6. Features

The sip:provider CE provides plenty of subscriber features to offer compelling VoIP services to end customers, and also to cover as many deployment scenarios as possible. In this chapter, we provide the features overview and describe their function and use cases.

6.1. Managing System Administrators

The sip:provider CE offers the platform operator with an easy to use interface to manage users with administrative privileges. Such users are representatives of resellers, and are entitled to manage configuration of services for Customers, Subscribers, Domains, Billing Profiles and other entities on Sipwise NGCP.

Administrators, as user accounts, are also used for client authentication on the REST API of NGCP.

There is a single administrator (username: "administrator"), whose account is enabled by default and who belongs to the default reseller. This user is the superuser of the NGCP administrative web interface (the so-called "admin panel"), and he has the right to modify administrators of other Resellers as well.

6.1.1. Configuring Administrators

Configuration of access rights of system administrators is possible through the admin panel of NGCP. In order to do that, please navigate to Settings → Administrators.

Figure 23. List of System Administrators

You have 2 options:

If you’d like to create a new administrator user press Create Administrator button.
If you’d like to update an existing administrator user press Edit button in its row.

There are some generic attributes that have to be set for each administrator:

Figure 24. Generic System Administrator Attributes

Reseller: each administrator user must belong to a Reseller. There is always a default reseller (ID: 1, Name: default), but the administrator has to be assigned to his real reseller, if such an entity (other than default) exists.
Login: the login name of the administrator user
Password: the password of the administrator user for logging in the admin panel, or for authentication on REST API

The second set of attributes is a list of access rights that are discussed in subsequent section of the handbook.

6.1.2. Access Rights of Administrators

The various access rights of administrators are shown in the figure and summarized in the table below.

Figure 25. Access Rights of System Administrators

Table 2. Access Rights of System Administrators

Label in admin list

Access Right

Description

not shown

Is superuser

The user is allowed to modify data on Reseller level and — among others — is able to modify administrators of other resellers. There should be only 1 user on Sipwise NGCP with this privilege.

Master

Is master

The user is allowed to create, delete or modify other Admins who belong to the same Reseller.

Active

Is active

The user account is active, i.e. the admin user can login on the web panel or authenticate himself on REST API; otherwise user authentication will fail.

Read Only

Read only

The user will only be able to list various data but is not allowed to modify anything.

For the web interface this means that Create… and Edit buttons will be hidden or disabled.
For the REST API this means that only GET, HEAD, OPTIONS HTTP request methods are accepted, and NGCP will reject those targeting data modification: PUT, PATCH, POST, DELETE.

Show Passwords

Show passwords

The user sees subscriber passwords (in plain text) on the web interface.

info
info	Admin panel user passwords are stored in an unreadable way (cryptographic hash digest) in the database, while subscriber passwords are basically always stored in plain text. The latter happens on purpose, e.g. to make subscriber data migration possible.

Show CDRs

Call data

This privilege has effect on 2 items that will be displayed on admin panel of NGCP, when Subscriber → Details is selected:

PBX Groups list
Captured Dialogs list

Show Billing Info

Billing data

Some REST API resources that are related to billing are disabled: HTTP requests on /api/vouchers, /api/topupcash and /api/topupvoucher resources are rejected.

Lawful Intercept

Lawful intercept

If the privilege is selected then the REST API for interceptions (that is: /api/interceptions) is enabled; if the privilege is not selected then the interceptions API is disabled.

info
info	This means that besides enabling LI in `config.yml` configuration file one also needs to enable the API via the LI privilege of an administrator user, so that NGCP can really provide LI service.

6.2. Access Control for SIP Calls

There are two different methods to provide fine-grained call admission control to both subscribers and admins. One is Block Lists, where you can define which numbers or patterns can be called from a subscriber to the outbound direction and which numbers or patterns are allowed to call a subscriber in the inbound direction. The other is NCOS Levels, where the admin predefines rules for outbound calls, which are grouped in certain levels. The subscriber can then just choose the level, or the admin can restrict a subscriber to a certain level. Also sip:provider CE offers some options to restrict the IP addresses that subscriber is allowed to use the service from. The following sections describe these features in detail.

6.2.1. Block Lists

Block Lists provide a way to control which users/numbers can call or be called, based on a subscriber level, and can be found in the Call Blockings section of the subscriber preferences.

Subscriber Block Lists

Block Lists are separated into Administrative Block Lists (adm_block_*) and Subscriber Block Lists (block_*). They both have the same behaviour, but Administrative Block Lists take higher precedence. Administrative Block Lists are only accessible by the system administrator and can thus be used to override any Subscriber Block Lists, e.g. to block certain destinations. The following break-down of the various block features apply to both types of lists.

6.2.1.1. Block Modes

Block lists can either be whitelists or blacklists and are controlled by the User Preferences block_in_mode, block_out_mode and their administrative counterparts.

The blacklist mode (option is not checked tells the system to allow anything except the entries in the list. Use this mode if you just want to block certain numbers and allow all the rest.
The whitelist mode indicates to reject anything except the entries in the list. Use this mode if you want to enforce a strict policy and allow only selected destinations or sources.

You can change a list mode from one to the other at any time.

6.2.1.2. Block Lists

The list contents are controlled by the User Preferences block_in_list, block_out_list and their administrative counterparts. Click on the Edit button in the Preferences view to define the list entries.

In block list entries, you can provide shell patterns like * and []. The behavior of the list is controlled by the block_xxx_mode feature (so they are either allowed or rejected). In our example above we have block_out_mode set to blacklist, so all calls to US numbers and to the Austrian number +431234567 are going to be rejected.

Outgoing Block List

Click the Close icon once you’re done editing your list.

6.2.1.3. Block Anonymous Numbers

For incoming call, the User Preference block_in_clir and adm_block_in_clir controls whether or not to reject incoming calls with number supression (either "[Aa]nonymous" in the display- or user-part of the From-URI or a header Privacy: id is set). This flag is independent from the Block Mode.

6.2.2. NCOS Levels

NCOS Levels provide predefined lists of allowed or denied destinations for outbound calls of local subscribers. Compared to Block Lists, they are much easier to manage, because they are defined on a global scope, and the individual levels can then be assigned to each subscriber. Again there is the distinction for user- and administrative-levels.

If case of a conflict, when the Block Lists feature allows a number and NCOS Levels rejects the same number or vice versa, the number will be rejected.

NCOS levels can either be whitelists or blacklists.

The blacklist mode indicates to allow everything except the entries in this level. This mode is used if you want to just block certain destinations and allow all the rest.
The whitelist mode indicates to reject anything except the entries in this level. This is used if you want to enforce a strict policy and allow only selected destinations.

6.2.2.1. Creating NCOS Levels

To create an NCOS Level, go to Settings→NCOS Levels and press the Create NCOS Level button.

NCOS Levels

Select a reseller, enter a name, select the mode and add a description, then click the Save button.

Create NCOS Levels

6.2.2.2. Creating Rules per NCOS Level

To define the rules within the newly created NCOS Level, click on the Patterns button of the level.

Enter NCOS Pattern View

There are 2 groups of patterns where you can define matching rules for the selected NCOS Level:

NCOS Number Patterns: here you can define number patterns that will be matched against the called number and allowed or blocked, depending on whitelist / blacklist mode. The patterns are regular expressions.
NCOS LNP Carriers: here you can select predefined LNP Carriers that will be allowed (whitelist mode) or prohibited (blacklist mode) to route calls to them. (See Section 6.4.1, “Local LNP Database” in the handbook for the description of LNP functionality)

Figure 26. NCOS Patterns List

In the NCOS Number Patterns view you can create multiple patterns to define your level, one after the other. Click on the Create Pattern Entry Button on top and fill out the form.

Figure 27. Create NCOS Number Pattern

In this example, we block (since the mode of the level is blacklist) all numbers starting with 439. Click the Save button to save the entry in the level.

There are 2 options that help you to easily define specific number ranges that will be allowed or blocked, depending on whitelist / blacklist mode:

Include local area code: all subscribers within the caller’s local area, e.g. if a subscriber has country-code 43 and area-code 1, then selecting this checkbox would result in the implicit number pattern: ^431.
Intra PBX calls within same customer: all subscribers that belong to the same PBX customer as the caller himself.

In the NCOS LNP Carriers view you can select specific LNP Carriers — i.e. carriers that host the called ported numbers — that will be allowed or blocked for routing calls to them (whitelist / blacklist mode, respectively).

Sipwise NGCP performs number matching always with the dialed number and not with the number generated after LNP lookup that is: either the original dialed number prefixed with an LNP carrier code, or the routing number.

An example of NCOS LNP Carrier pattern definition:

Figure 28. Create NCOS LNP Carrier

In the above example we created a rule that blocks calls to "LNP_Carr1" carrier, supposing we use blacklist mode of the NCOS Level.

info
info	Currently NGCP does not support filtering of individual phone numbers in addition to LNP Carrier matching. In other words: combining phone number and LNP Carrier patterns is not possible.

tip

There might be situations when phone number patterns may not be strictly aligned with telephony providers, for instance in case of full number portability in a country. In such cases using NCOS LNP Carriers patterns still allows for defining NCOS levels that allow / block calls to mobile numbers, for example. In order to achieve this goal you have to list all LNP carriers in the NCOS patterns that are known to host mobile numbers.

6.2.2.3. Assigning NCOS Levels to Subscribers/Domains

Once you’ve defined your NCOS Levels, you can assign them to local subscribers. To do so, navigate to Settings→Subscribers, search for the subscriber you want to edit, press the Details button and go to the Preferences View. There, press the Edit button on either the ncos or adm_ncos setting in the Call Blockings section.

Assign NCOS Level

You can assign the NCOS level to all subscribers within a particular domain. To do so, navigate to Settings→Domains, select the domain you want to edit and click Preferences. There, press the Edit button on either ncos or admin_ncos in the Call Blockings section.

Note: if both domain and subscriber have same NCOS preference set (either ncos or adm_ncos, or both) the subscriber’s preference is used. This is done so that you can override the domain-global setting on the subscriber level.

6.2.2.4. Assigning NCOS Level for Forwarded Calls to Subscribers/Domains

In some countries there are regulatory requirements that prohibit subscribers from forwarding their numbers to special numbers like emergency, police etc. While the sip:provider CE does not deny provisioning Call Forward to these numbers, the administrator can prevent the incoming calls from being actually forwarded to numbers defined in the NCOS list: just select the appropriate NCOS level in the domain’s or subscriber’s preference adm_cf_ncos. This NCOS will apply only to the Call Forward from the subscribers and not to the normal outgoing calls from them.

6.2.3. IP Address Restriction

The sip:provider CE provides subscriber preference allowed_ips to restrict the IP addresses that subscriber is allowed to use the service from. If the REGISTER or INVITE request comes from an IP address that is not in the allowed list, the sip:provider CE will reject it with a 403 message. Also a voice message can be played when the call attempt is rejected (if configured).

By default, allowed_ips is an empty list which means that subscriber is not restricted. If you want to configure a restriction, navigate to Settings→Subscribers, search for the subscriber you want to edit, press Details and then Preferences and press Edit for the allowed_ips preference in the Access Restrictions section.

Edit Subscriber Allowed IP Addresses

Press the Edit button to the right of empty drop-down list.

You can enter multiple allowed IP addresses or IP address ranges one after another. Click the Add button to save each entry in the list. Click the Delete button if you want to remove some entry.

6.3. Call Forwarding and Call Hunting

The sip:provider CE provides the capabilities for normal call forwarding (deflecting a call for a local subscriber to another party immediately or based on events like the called party being busy or doesn’t answer the phone for a certain number of seconds) and serial call hunting (sequentially executing a group of deflection targets until one of them succeeds). Targets can be stacked, which means if a target is also a local subscriber, it can have another call forward or hunt group which is executed accordingly.

Call Forwards and Call Hunting Groups can either be executed unconditionally or based on a Time Set Definition, so you can define deflections based on time period definitions (e.g. Monday to Friday 8am to 4pm etc).

6.3.1. Setting a simple Call Forward

Go to your Subscriber Preferences and click Edit on the Call Forward Type you want to set (e.g. Call Forward Unconditional).

Create Simple Call Forward

If you select URI/Number in the Destination field, you also have to set a URI/Number. The timeout defines for how long this destination should be tried to ring.

6.3.2. Advanced Call Hunting

Beside call forwarding to a single destination, Sipwise NGCP offers the possibility to activate call forwarding in a more sophisticated way:

to multiple destinations (→ Destination Set)
only during a pre-defined time set (→ Time Set)
only for specific callers (→ Source Set)

If you want to define such more detailed call forwarding rules, you need to change into the Advanced View when editing your call forward. There, you can select multiple Destination Set - Time Set - Source Set triples that determine all conditions under which the call will be forwarded.

Explanation of call forward parameters

A Destination Set is a list of destinations where the call will be routed to, one after another, according to the order of their assigned priorities. See the Destination Sets Section 6.3.2.1, “Configuring Destination Sets” subchapter for a detailed description.
A Time Set is a time period definition, i.e. when the call forwarding has to be active. See the Time Sets Section 6.3.2.2, “Configuring Time Sets” subchapter for a detailed description.
A Source Set is a list of number patterns that will be matched against the calling party number; if the calling number matches the call forwarding will be executed. See the Source Sets Section 6.3.2.3, “Configuring Source Sets” subchapter for a detailed description.

6.3.2.1. Configuring Destination Sets

Click on Manage Destination Sets to see a list of available sets. The quickset_cfu has been implicitly created during our creation of a simple call forward. You can edit it to add more destinations, or you can create a new destination set.

Create CF Destination Set

When you close the Destination Set Overview, you can now assign your new set in addition or instead of the quickset_cfu set.

Assign CF Destination Sets

Press Save to store your settings.

6.3.2.2. Configuring Time Sets

Click on Manage Time Sets in the advanced call-forward menu to see a list of available time sets. By default there are none, so you have to create one.

Create CF Time Set

You need to provide a Name, and a list of Periods where this set is active. If you only set the top setting of a date field (like the Year setting in our example above), then it’s valid for just this setting (like the full year of 2013 in our case). If you provide the bottom setting as well, it defines a period (like our Month setting, which means from beginning of April to end of September). For example, if a CF is set with the following timeset: "hour { 10-12 } minute { 20-30 }", the CF will be matched within the following time ranges:

from 10.20am to 10:30am
from 11.20am to 11:30am
from 12.20am to 12:30am

important
important	the period is a through definition, so it covers the full range. If you define an Hour definition 8-16, then this means from 08:00 to 16:59:59 (unless you filter the Minutes down to something else).

If you close the Time Sets management, you can assign your new time set to the call forwards you’re configuring.

6.3.2.3. Configuring Source Sets

Once the Advanced View of the call forward definition has been opened, you will need to press the Manage Source Sets button to start defining new Source Sets or managing an existing one. The following image shows the Source Set definition dialog:

Figure 29. Creating a Call Forward Source Set

You will need to fill in the Name field first, then in Source field you can enter:

A simple phone number in E.164 format
A pattern, in order to define a range of numbers. You can use "*" (matches a string of 0 to any number of characters), "?" (matches any single character), "[abc]" (matches a single character that is part of the explicitly listed set: a, b or c) and "[0-9]" (matches a single character that falls in the range 0 to 9) as wildcards, as usual in shell patterns. Examples:
- "431*" (all numbers from Vienna / Austria)
- "49176[0-5]77*" (German numbers containing fixed digits and a variable digit in 0-5 range in position 6)
- "43130120??" (numbers from Vienna with fixed prefix and 2 digits variable at the end)
The constant string "anonymous" that indicates a suppressed calling number (CLIR)

You can add more patterns to the Source Set by pressing the Add another source button. When you finished adding all patterns, press the Save button. You will then see the below depicted list of Source Sets:

Figure 30. List of Call Forward Source Sets

As a next step you can define a Destination Set as described in Destination Sets Section 6.3.2.1, “Configuring Destination Sets” subchapter. For our example, we have defined the following Destination Set:

Figure 31. List of Call Forward Destination Sets

A final step of defining the call forward settings is selecting a Destination, a Time and a Source Set, as shown in the image below. Please note that there is no specific Time Set selected in our example, that means the call forward rule is valid (as shown) <always>.

Figure 32. Definition of a Call Forward with Source and Destination Sets

Once all the settings have been defined and the changes are saved, you will see the call forward entry (in our example: Call Forward Unconditional), with the names of the selected Destination, Time and Source Sets provided, at Subscriber Preferences → Call Forwards location on the web interface:

Figure 33. List of Call Forward with Source and Destination Sets

6.4. Local Number Porting

The Sipwise NGCP platform comes with two ways of accomplishing local number porting (LNP):

one is populating the integrated LNP database with porting data,
the other is accessing external LNP databases via the Sipwise LNP daemon using the LNP API.

info
info	Accessing external LNP databases is available for PRO and CARRIER products only.

6.4.1. Local LNP Database

The local LNP database provides the possibility to define LNP Carriers (the owners of certain ported numbers or number blocks) and their corresponding LNP Numbers belonging to those carriers. It can be configured on the admin panel in Settings→Number Porting or via the API. The LNP configuration can be populated individually or via CSV import/export both on the panel and the API.

6.4.1.1. LNP Carriers

LNP Carriers are defined by an arbitrary Name for proper identification (e.g. British Telecom) and contain a Prefix which can be used as routing prefix in LNP Rewrite Rules and subsequently in Peering Rules to route calls to the proper carriers. The LNP prefix is written to CDRs to identify the selected carrier for post processing and analytics purposes of CDRs. LNP Carrier entries also have an Authoritative flag indicating that the numbers in this block belong to the carrier operating the sip:provider CE. This is useful to define your own number blocks, and in case of calls to those numbers reject the calls if the numbers are not assigned to local subscribers (otherwise they would be routed to a peer, which might cause call loops). Finally the Skip Rewrite flag skips executing of LNP Rewrite Rules if no number manipulation is desired for an LNP carrier.

6.4.1.2. LNP Numbers

LNP Carriers contain one or more LNP Numbers. Those LNP Numbers are defined by a Number entry in E164 format (<cc><ac><sn>) used to match a number against the LNP database. Number matching is performed on a longest match, so you can define number blocks without specifying the full subscriber number (e.g. a called party number 431999123 is going to match an entry 431999 in the LNP Numbers).

For an LNP Numbers entry, an optional Routing Number can be defined. This is useful to translate e.g. premium 900 or toll-free 800 numbers to actual routing numbers. If a Routing Number is defined, the called party number is implicitly replaced by the Routing Number and the call processing is continued with the latter. For external billing purposes, the optional Type tag of a matched LNP number is recorded in CDRs.

An optional Start Date and End Date allows to schedule porting work-flows up-front by populating the LNP database with certain dates, and the entries are only going to become active with those dates. Empty values for start indicate a start date in the past, while empty values for end indicate an end time in the future during processing of a call, allowing to define infinite date ranges. As intervals can overlap, the LNP number record with a start time closest to the current time is selected.

6.4.1.3. Enabling local LNP support

In order to activate Local LNP during routing, the feature must be activated in config.yml. Set kamailio→proxy→lnp→enabled to yes and kamailio→proxy→lnp→type to local.

6.4.1.4. LNP Routing Procedure

Calls to non-authoritative Carriers

When a call arrives at the system, the calling and called party numbers are first normalized using the Inbound Rewrite Rules for Caller and Inbound Rewrite Rules for Callee within the rewrite rule set assigned to the calling party (a local subscriber or a peer).

If the called party number is not assigned to a local subscriber, or if the called party is a local subscriber and has the subscriber/domain preference lnp_for_local_sub set, the LNP lookup logic is engaged, otherwise the call proceeds without LNP lookup. The further steps assume that LNP is engaged.

If the call originated from a peer, and the peer preference caller_lnp_lookup is set for this peer, then an LNP lookup is performed using the normalized calling party number. The purpose for that is to find the LNP prefix of the calling peer, which is then stored as source_lnp_prefix in the CDR, together with the selected LNP number’s type tag (source_lnp_type). If the LNP lookup does not return a result (e.g. the calling party number is not populated in the local LNP database), but the peer preference default_lnp_prefix is set for the originating peer, then the value of this preference is stored in source_lnp_prefix of the CDR.

Next, an LNP lookup is performed using the normalized called party number. If no number is found (using a longest match), no further manipulation is performed.

If an LNP number entry is found, and the Routing Number is set, the called party number is replaced by the routing number. Also, if the Authoritative flag is set in the corresponding LNP Carrier, and the called party number is not assigned to a local subscriber, the call is rejected. This ensures that numbers allocated to the system but not assigned to subscribers are dropped instead of routed to a peer.

important

If the system is serving a local subscriber with only the routing number assigned (but not e.g. the premium number mapping to this routing number), the subscriber will not be found and the call will either be rejected if the called party premium number is within an authoritative carrier, or the call will be routed to a peer. This is due to the fact that the subscriber lookup is performed with the dialled number, but not the routing number fetched during LNP. So make sure to assign e.g. the premium number to the local subscriber (optionally in addition to the routing number if necessary using alias numbers) and do not use the LNP routing number mechanism for number mapping to local subscribers.

Next, if the the LNP carrier does not have the Skip Rewriting option set, the LNP Rewrite Rules for Callee are engaged. The rewrite rule set used is the one assigned to the originating peer or subscriber/domain via the rewrite_rule_set preference. The variables available in the match and replace part are, beside the standard variables for rewrite rules:

${callee_lnp_prefix}: The prefix stored in the LNP Carrier
${callee_lnp_basenumber}: The actual number entry causing the match (may be shorter than the called party number due to longest match)

Typically, you would create a rewrite rule to prefix the called party number with the callee_lnp_prefix by matching ^([0-9]+)$ and replacing it by ${callee_lnp_prefix}\1.

Once the LNP processing is completed, the system checks for further preferences to finalize the number manipulation. If the originating local subscriber or peer has the preference lnp_add_npdi set, the Request URI user-part is suffixed with ;npdi. Next, if the preference lnp_to_rn is set, the Request URI user-part is suffixed with ;rn=LNP_ROUTING_NUMBER, where LNP_ROUTING_NUMBER is the Routing Number stored for the number entry in the LNP database, and the originally called number is kept in place. For example, if lnp_to_rn is set and the number 1800123 is called, and this number has a routing number 1555123 in the LNP database, the resulting Request-URI is sip:1800123;rn=1555123@example.org.

Finally, the destination_lnp_prefix in the CDR table is populated either by the prefix defined in the Carrier of the LNP database if a match was found, or by the default_lnp_prefix prefrence of the destination peer or subscriber/domain.

6.4.1.5. Blocking Calls Using LNP Data

The Sipwise NGCP provides means to allow or block calls towards ported numbers that are hosted by particular LNP carriers. Please visit Section 6.2.2.2, “Creating Rules per NCOS Level” in the handbook to learn how this can be achieved.

6.4.1.6. Transit Calls using LNP

If a call originated from a peer and the peer preference force_outbound_calls_to_peer is set to force_nonlocal_lnp (the if callee is not local and is ported selection in the panel), the call is routed back to a peer selected via the peering rules.

This ensures that if a number once belonged to your system and is ported out, but other carriers are still sending calls to you (e.g. selecting you as an anchor network), the affected calls can be routed to the carrier the number got ported to.

6.4.1.7. CSV Format

The LNP database can be exported to CSV, and in the same format imported back to the system. On import, you can decide whether to drop existing data prior to applying the data from the CSV.

The CSV file format contains the fields in the following order:

carrier_name carrier_prefix number routing_number start end authoritative skip_rewrite

Table 3. LNP CSV Format

Name	Description
Carrier Name	The Name in the LNP Carriers table (string, e.g. My Carrier)
Carrier Prefix	The Prefix in the LNP Carriers table (string, e.g. DD55)
Number	The Number in the LNP Numbers table (E164 number, e.g. 1800666)
Routing Number	The Routing Number in the LNP Numbers table (E164 number or empty, e.g. 1555666)
Start	The Start in the LNP Numbers table (YYYY-MM-DD or empty, e.g. 2016-01-01)
End	The End in the LNP Numbers table (YYYY-MM-DD or empty, e.g. 2016-12-30)
Authoritative	The Authoritative flag in the LNP Carriers table (0 or 1)
Skip Rewrite	The Skip Rewrite flag in the LNP Carriers table (0 or 1)
Type	The Type tag in the LNP Numbers table (alphanumeric string, e.g. mobile)

6.5. Emergency Mapping

As opposed to the Simple Emergency Number Handling Section 5.7.5.1, “Simple Emergency Number Handling Overview” solution, the Sipwise NGCP supports an advanced emergency call handling method, called emergency mapping. The main idea is: instead of obtaining a statically assigned emergency prefix / suffix from subscriber preferences, NGCP retrieves an emergency routing prefix from a central emergency call routing table, according to the current location of the calling subscriber.

The following figure shows the overview of emergency call processing when using emergency mapping feature:

Figure 34. Emergency Call Handling with Mapping

6.5.1. Emergency Mapping Description

Emergency numbers per geographic location are mapped to different routing prefixes not deriveable from an area code or the emergency number itself. This is why a global emergency mapping table related to resellers is introduced, allowing to map emergency numbers to their geographically dependent routing numbers.

The geographic location is referenced by a location ID, which has to be populated by a north-bound provisioning system. No towns, areas or similar location data is stored on the NGCP platform. The locations are called Emergency Containers on NGCP.

The actual emergency number mapping is done per location (per Emergency Container), using the so-called Emergency Mapping entries. An Emergency Mapping entry assigns a routing prefix, valid only in a geographic area, to a generic emergency number (for example 112 in Europe, 911 in the U.S.A.) or a country specific one (for example 133).

info
info	As of mr4.5 version, the NGCP performs an exact match on the emergency number in the emergency routing table.

Emergency Containers may be assigned to various levels of the client hierarchy within NGCP. The following list shows such levels with each level overriding the settings of the previous one:

Customer or Domain
Customer Location, which is a territory representing a subset of the customer’s subscribers, defined as one or more IP subnets.
Subscriber

info
info	Please be aware that Customer Location is not necessarily identical to the "location" identified through an Emergency Container.

Once the emergency routing prefix has been retrieved from the emergency mapping table, call processing continues in the same way as in case of simple emergency call handling.

6.5.2. Emergency Mapping Configuration

The administrative web panel of NGCP provides the configuration interface for emergency mapping. Please navigate to Settings → Emergency Mapping menu item first, in order to start configuring the mapping.

An Emergency Container must be created, before the mapping entries can be defined. Press Create Emergency Container to start this. An example of a container is shown here:

Figure 35. Creating an Emergency Container

You have to select a Reseller that this container belongs to, and enter a Name for the container, which is an arbitrary text.

tip
tip	The platform administrator has to create as many containers as the number of different geographic areas (locations) the subscribers are expected to be in.

As the second step of emergency mapping provisioning, the Emergency Mapping entries must be created. Press Create Emergency Mapping to start this step. An example is shown here:

Figure 36. Creating an Emergency Mapping Entry

The following parameters must be set:

Container: select an emergency mapping container (i.e. a location ID)
Code: the emergency number that subscribers will dial
Prefix: the routing prefix that belongs to the particular emergency service within the selected location

Once all the necessary emergency mappings have been defined, the platform administrator will see a list of containers and mapping entries:

Figure 37. Emergency Mapping List

The emergency number mapping is now defined. As the next step, the platform administrator has to assign the emergency containers to Customers / Domains / Customer Locations or Subscribers. We’ll take an example with a Customer: select the customer, then navigate to Details → Preferences → Number Manipulations. In order to assign a container, press the Edit button and then select one container from the drop-down list:

Figure 38. Assigning an Emergency Mapping Container

Rewrite Rules for Emergency Mapping

Once emergency containers and emergency mapping entries are defined, the NGCP administrator has to ensure that the proper number manipulation takes place, before initiating any emergency call towards peers.

important
important	Please don’t forget to define the rewrite rules for peers — particularly: Outbound Rewrite Rules for Callee — as described in Normalize Emergency Calls for Peers Section 5.7.5.3, “Normalize Emergency Calls for Peers” section of the handbook.

6.5.2.1. Emergency Calls Not Allowed

There is a special case when the dialed number is recognized as an emergency number, but the emergency number is not available for the geographic area the calling party is located in.

In such a case the emergency mapping lookup will return an emergency prefix, but the value of this will be NULL. Therefore the call is rejected and an announcement is played. The announcement is a newly defined sound file referred as emergency_geo_unavailable.

It is possible to configure the rejection code and reason in /etc/ngcp-config/config.yml file, the parameters are: kamailio.proxy.early_rejects.emergency_invalid.announce_code and kamailio.proxy.early_rejects.emergency_invalid.announce_reason.

6.5.2.2. Bulk Upload or Download of Emergency Mapping Entries

The Sipwise NGCP offers the possibility to upload / download emergency mapping entries in form of CSV files. This operation is available for each reseller, and is very useful if a reseller has many mapping entries.

Downloading Emergency Mapping List

One has to navigate to Settings → Emergency Mapping menu and then press the Download CSV button to get the list of mapping entries in a CSV file. First the reseller must be selected, then the Download button must be pressed. As an example, the entries shown in "Emergency Mapping List" picture above would be written in the file like here below:

EmergCont_1,133,E1_133_
EmergCont_1,144,E1_144_
EmergCont_2,133,E2_133_

The CSV file has a plain text format, each line representing a mapping entry, and contains the following fields:

Container name, as defined in Emergency Containers
Emergency Number
Emergency Prefix

Uploading Emergency Mapping List

Uploading a CSV file with emergency mapping entries may be started after pressing the Upload CSV button. The following data must be provided:

Reseller: selected from the list
Upload mapping: the CSV file must be selected after pressing the Choose File button
Purge existing: an option to purge existing emergency mapping entries that belong to the selected reseller, before populating the new mapping data from the file

Figure 39. Uploading Emergency Mapping Data

The CSV file for the upload has the same format as the one used for download.

6.6. Header Manipulation

6.6.1. Header Filtering

Adding additional SIP headers to the initial INVITEs relayed to the callee (second leg) is possible by modifying the following template file: /etc/ngcp-config/templates/etc/ngcp-sems/etc/ngcp.sbcprofile.conf.customtt.tt2. The following section can be changed:

header_filter=whitelist
header_list=[%IF kamailio.proxy.debug == "yes"%]P-NGCP-CFGTEST,[%END%]
P-R-Uri,P-D-Uri,P-Preferred-Identity,P-Asserted-Identity,Diversion,Privacy,
Allow,Supported,Require,RAck,RSeq,Rseq,User-Agent,History-Info,Call-Info
[%IF kamailio.proxy.presence.enable == "yes"%],Event,Expires,
Subscription-State,Accept[%END%][%IF kamailio.proxy.allow_refer_method
== "yes"%],Referred-By,Refer-To,Replaces[%END%]

By default the system will remove from the second leg all the SIP headers which are not in the above list. If you want to keep some additional/custom SIP headers, coming from the first leg, into the second leg you just need to add them at the end of the header_list= list. After that, as usual, you need to apply the changes. In this way the system will keep your headers in the INVITE sent to the destination subscriber/peer.

warning
warning	DO NOT TOUCH the list if you don’t know what you are doing.

6.6.2. Codec Filtering

Sometimes you may need to filter some audio CODEC from the SDP payload, for example if you want to force your subscribers to do not talk a certain codecs or force them to talk a particular one. To achieve that you just need to change the /etc/ngcp-config/config.yml, in the following section:

sdp_filter:
      codecs: PCMA,PCMU,telephone-event
      enable: yes
      mode: whitelist

In the example above, the system is removing all the audio CODECS from the initial INVITE except G711 alaw,ulaw and telephone-event. In this way the callee will be notified that the caller is able to talk only PCMA. Another example is the blacklist mode:

sdp_filter:
      codecs: G729,G722
      enable: yes
      mode: blacklist

In this way the G729 and G722 will be removed from the SDP payload. In order to apply the changes, as usual, you need to run ngcpcfg apply Enable CODEC filtering .

6.6.3. Enable History and Diversion Headers

It may be useful and mandatory - specially with NGN interconnection - to enable SIP History header and/or Diversion header for outbound requests to a peer or even for on-net calls. In order to do so, you should enable the following preferences in Domain’s and Peer’s Preferences:

Domain’s Prefererences: inbound_uprn = Forwarder’s NPN
Peer’s Prefererences: outbound_history_info = UPRN
Peer’s Prefererences: outbound_diversion = UPRN
Domain’s Prefererences: outbound_history_info = UPRN (if you want to allow History Header for on-net call as well)
Domain’s Prefererences: outbound_diversion = UPRN (if you want to allow Diversion Header for on-net call as well)

6.7. SIP Trunking with SIPconnect

6.7.1. User provisioning

For the purpose of external SIP-PBX interconnect with sip:provider CE the platform admin should create a subscriber with multiple aliases representing the numbers and number ranges served by the SIP-PBX.

Subscriber username - any SIP username that forms an "email-style" SIP URI.
Subscriber Aliases - numbers in the global E.164 format without leading plus.

To configure the Subscriber, go to Settings→Subscribers and click Details on the row of your subscriber. There, click on the Preferences button on top.

You should look into the Number Manipulations and Access Restrictions sections in particular, which control the calling and called number presentation.

6.7.2. Inbound calls routing

Enable preference Number Manipulations→e164_to_ruri for routing inbound calls to SIP-PBX. This ensures that the Request-URI will comprise a SIP-URI containing the dialed alias-number as user-part, instead of the user-part of the registered AOR (which is normally a static value).

6.7.3. Number manipulations

The following sections describe the recommended configuration for correct call routing and CLI presentation according to the SIPconnect 1.1 recommendation.

6.7.3.1. Rewrite rules

The SIP PBX by default inherits the domain dialplan which usually has rewrite rules applied to normal Class 5 subscribers with inbound rewrite rules normalizing the dialed number to the E.164 standard. If most users of this domain are Class 5 subscribers the dialplan may supply calling number in national format - see Section 5.7, “Configuring Rewrite Rule Sets”. While the SIP-PBX trunk configuration can be sometimes amended it is a good idea in sense of SIPconnect recommendation to send only the global E.164 numbers.

Moreover, in mixed environments with the sip:provider CE Cloud PBX sharing the same domain with SIP trunking (SIP-PBX) customers the subscribers may have different rewrite rules sets assigned to them. The difference is caused by the fact that the dialplan for Cloud PBX is fundamentally different from the dialplan for SIP trunks due to extension dialing, where the Cloud PBX subscribers use the break-out code to dial numbers outside of this PBX.

The SIPconnect compliant numbering plan can be accommodated by assigning Rewrite Rules Set to the SIP-PBX subscriber. Below is a sample Rewrite Rule Set for using the global E.164 numbers with plus required for the calling and called number format compliant to the recommendation.

Inbound Rewrite Rule for Caller

Match Pattern: ^(00|\+)([1-9][0-9]+)$
Replacement Pattern: \2
Description: International to E.164
Direction: Inbound
Field: Caller

Inbound Rewrite Rule for Callee

Match Pattern: ^(00|\+)([1-9][0-9]+)$
Replacement Pattern: \2
Description: International to E.164
Direction: Inbound
Field: Callee

Outbound Rewrite Rule for Caller

Match Pattern: ^([1-9][0-9]+)$
Replacement Pattern: +\1
Description: For the calls to SIP-PBX add plus to E.164
Direction: Outbound
Field: Caller

Outbound Rewrite Rule for Callee

Match Pattern: ^([1-9][0-9]+)$
Replacement Pattern: +\1
Description: For the calls to SIP-PBX add plus to E.164
Direction: Outbound
Field: Callee

Assign the aforementioned Rewrite Rule Set to the SIP-PBX subscribers.

warning
warning	Outbound Rewrite Rules for Callee shall NOT be applied to the calls to normal SIP UAs like IP phones since the number with plus does not correspond to their SIP username.

6.7.3.2. User parameter

The following configuration is needed for your platform to populate the From and To headers and Request-URI of the INVITE request with "user=phone" parameter as per RFC 3261 Section 19.1.1 (if the user part of the URI contains telephone number formatted as a telephone-subscriber).

Domain’s Prefererences: outbound_from_user_is_phone = Y
Domain’s Prefererences: outbound_to_user_is_phone = Y

6.7.3.3. Forwarding number

The following is our common configuration that covers the calling number presentation in a variety of use-cases, including the incoming calls, on-net calls and Call Forward by the platform:

Domain’s Preferences: inbound_uprn = Forwarder’s NPN
Domain’s Preferences: outbound_from_user = UPRN (if set) or User-Provided Number
Domain’s Preferences: outbound_pai_user = UPRN (if set) or Network-Provided Number
Domain’s Preferences: outbound_history_info = UPRN (if the called user expects History-Info header)
Domain’s Preferences: outbound_diversion = UPRN (if the called user expects Diversion header)
Domain’s Preferences: outbound_to_user = Original (Forwarding) called user if the callee expects the number of the subscriber forwarding the call, otherwise leave default.

The above parameters can be tuned to operator specifics as required. You can of course override these settings in the Subscriber Preferences if particular subscribers need special settings.

tip
tip	On outgoing call from SIP-PBX subscriber the Network-Provided Number (NPN) is set to the cli preference prefilled with main E.164 number. In order to have the full alias number as NPN on outgoing call set preference extension_in_npn = Y.

Externally forwarded call. If the call forward takes place inside the SIP-PBX it can use one of the following specification for signaling the diversion number to the platform:

using Diversion method (RFC 5806): configure Subscriber’s Prefererences: inbound_uprn = Forwarder’s NPN / Received Diversion
using History-Info method (RFC 7044): NGCP platform extends the History-Info header received from the PBX by adding another level of indexing according to the specification RFC 7044.

6.7.3.4. Allowed CLIs

For correct calling number presentation on outgoing calls, you should include the pattern matching all the alias numbers of SIP-PBX or each individual alias number under the allowed_clis preference.
If the signalling calling number (usually taken from From user-part, see inbound_upn preferences) does not match the allowed_clis pattern, the user_cli or cli preference (Network-Provided Number) will be used for calling number presentation.

6.7.4. Registration

SIP-PBX can use either Static or Registration Mode. While SIPconnect 1.1 continues to require TLS support at MUST strength, one should note that using TLS for signaling does not require the use of the SIPS URI scheme. SIPS URI scheme is obsolete for this purpose.

Static Mode. While SIPconnect 1.1 allows the use of Static mode, this poses additional maintenance overhead on the operator. The administrator should create a static registration for the SIP-PBX: go to Susbcribers, Details→Registered Devices→Create Permanent Registration and put address of the SIP-PBX in the following format: sip:username@ipaddress:5060 where username=username portion of SIP URI and ipaddress = IP address of the device.

Registration Mode. It is recommended to use the Registration mode with SIP credentials defined for the SIP-PBX subscriber.

important
important	The use of RFC 6140 style "bulk number registration" is discouraged. The SIP-PBX should register one AOR with email-style SIP URI. The sip:provider CE will take care of routing the aliases to the AOR with e164_to_ruri preference.

6.7.4.1. Trusted sources

If a SIP-PBX can not be configured to perform digest authentication, you can enable IP-based authentication in sip:provider CE for it. For this go to the subscriber’s preferences (Details→Preferences→Trusted Sources) and specify the IP address of the SIP-PBX in the Source IP field.

When this feature is configured, the sip:provider CE will authenticate all calls of this user that arrive from the specified IP without sending a challenge.

important
important	If the same IP address is mistakenly specified as trusted for different subscribers, the sip:provider CE will not know which subscriber should be responsible for the call and will randomly select one.

6.8. Trusted Subscribers

In some cases, when you have a device that cannot authenticate itself towards sip:provider CE, you may need to create Trusted Subscriber. Trusted Subscribers use IP-based authentication and they have a Permanent SIP Registration URI in order to receive messages from sip:provider CE. In order to create a Trusted Subscriber you just need to create a normal subscriber, then Create a Permanent Registration via (Subscribers→Details→Registered Devices→Create Permanent Registration) and also you need to add the devices IP as Trusted Source in your subscriber’s preferences (Details→Preferences→Trusted Sources). In this way, all messages coming from your device IP will be trusted (and authenticate just via the source IP), on the other side all the SIP messages to your devices will be sent to the SIP URI specified in the Permanent Registration.

6.9. Peer Probing

The basic way of selecting the appropriate peering server, where an outbound call can be routed to, has already been described in Section 5.6.2.3, “Peering Group Selection Procedure” of the handbook.

This chapter provides information on the peer probing feature of NGCP that is available since mr5.4.1 release.

6.9.1. Introduction to Peer Probing Feature

The Sipwise NGCP provides web admin panel and API capabilities to configure peering servers in order to terminate calls to non-local subscribers. Those peering servers may become temporarily unavailable due to overloading or networking issues. The NGCP will fail over to another peering server (matching the corresponding peering rules) after a timeout configured at system level (see sems.sbc.outbound_timeout configuration parameter; 6 sec by default), if no provisional response (a response with a code in the range of 100 to 199) is received for the outbound INVITE request.

Even if this timer is set much lower, like 3 sec, the call setup time is increased significantly. This is even more true if multiple peering servers fail at the same time, which will sum up the individual timeouts, finally causing call setup times reach the order of tens of seconds.

To optimize the call setup time in such scenarios, a new feature is implemented to continuously probe peering servers via SIP messages, and mark them as unavailable on timeout or when receiving unexpected response codes. Appropriate SIP response codes from the peering servers will mark them as available again.

Peering servers marked as unavailable are then skipped during call routing in the peering selection process, which significantly shortens the call setup times if peering servers fail.

6.9.2. Configuration of Peer Probing

The system administrator has to configure the peer probing feature in 2 steps:

System-level configuration enables the peer probing feature in general on the NGCP and determines the operational parameters, such as timeouts, the SIP method used for probing requests, etc.
Peering server configuration will add / remove a peering server to the list of probed endpoints.

6.9.2.1. System-level Configuration

The parameters of peer probing are found in the main system configuration file /etc/ngcp-config/config.yml. You can see the complete list of configuration parameters in Section 1.14, “kamailio” of the handbook, while the most significant ones are discussed here.

Enabling peer probing system-wide happens through the kamailio.proxy.peer_probe.enable parameter. If it is set to yes (which is the default value) then NGCP will consider probing of individual peering servers based on their settings.

Timeout of a single probing request can be defined through kamailio.proxy.peer_probe.timeout parameter. This is a value interpreted as seconds while NGCP will wait for a SIP response from the peering server. Default is 5 seconds.

The probing interval can be set through the kamailio.proxy.peer_probe.interval parameter. This is the time period in seconds that determines how often a probing request is sent to the peering servers. Default is 10 seconds.

The SIP method used for probing requests can be defined through kamailio.proxy.peer_probe.method parameter. Allowed values are: OPTIONS (default) and INFO.

tip
tip	The system administrator, in most of the cases, will not need to modify the default configuration values other than that of timeout and interval.

If no available peering server is found, the call is rejected with the response code and reason configured in kamailio.proxy.early_rejects.peering_unavailable.announce_code and kamailio.proxy.early_rejects.peering_unavailable.announce_reason. If a sound file is configured within the system sound set assigned to the calling party, an announcement is played as early media before the rejection.

6.9.2.2. Individual Peering Server Configuration

When the peer probing feature is enabled on system-level, it is possible to add each individual peering server to the list of probed endpoints. You can change the probed status of a server in two ways:

Enable probing of a peering server via the admin web interface

Open the properties panel of a peering server: Peerings → select a peering group → Details → select a peering server → Edit
Tick the checkbox Enable Probing
Save changes

Figure 40. Enable Probing of Peering Server

Enable probing of a peering server via the REST API

when you create a new peering server you will use an HTTP POST request and the target URL: https://<IP_of_NGCP>:1443/api/peeringservers
when you update an existing peering server you will use an HTTP PUT or PATCH request and the target URL: https://<IP_of_NGCP>:1443/api/peeringservers/id

In all cases you have to set the probe property to true in order to enable probing, and to false in order to disable probing. Default value is false and this property may be omitted in a create/update request, which ensures backward compatibility of the /api/peeringservers API resource.

6.9.3. Monitoring of Peer Probing

Peering server states, such as "reachable" / "unreachable", are continuously stored in a time-series database (InfluxDB type) by NGCP Proxy nodes. It is possible to graphically represent the state of peering servers on NGCP’s admin web interface, just like other system variables (like CPU and memory usage, number of registered subscribers, etc.). However this is not available by default and must be configured by Sipwise.

State changes of peering servers are also reported by means of SNMP traps. Each time the reachable state of one of the monitored peering servers changes, NGCP will send an SNMP trap, raising or clearing the alarm.

The Sipwise MIB is extended by a table of peers per proxy, containing the peer ID and the peer name, along with the peer probe status. An external monitoring system can poll the peers table via SNMP to gather the peer status from each proxy’s point of view.

The peer status can be obtained through the following route / OID:

 ...enterprises.sipwise.ngcp.ngcpObjects.ngcpMonitor.ngcpMonitorPeering.psTable.psEntry.psPeerStatus

 .1.3.6.1.4.1.34274.1.1.2.40.2.1.7

Value of psPeerStatus can be:

0: unknown
1: administratively down
2: administratively up
3: probed, pending
4: probed, down
5: probed, up

6.9.4. Further Details for Advanced Users

tip
tip	This subchapter of the handbook is targeted on advanced system operators and Sipwise engineers and is not necessary to read in order to properly manage peer probing feature of NGCP.

6.9.4.1. Behaviour of Kamailio Proxy Instances

Each kamailio-proxy instance on the proxy nodes performs the probing individually for performance reasons. Each proxy holds its result in its cache to avoid central storage and replication of the probing results. Each proxy will send an SNMP trap if it detects a state change for a peering server, because proxies might be geographically distributed along with their load-balancers and can therefore experience different probing results.

Each peering server is cross-checked against the hash table filled during outbound probing requests and is skipped by call routing logic, if a match is found.

On start or restart of the kamailio-proxy instance, the probing will start after the first interval, and NOT immediately after start. In the first probing interval the proxy will always try to send call traffic to peering servers until the first probing round is finished, and will only then start to skip unavailable peering servers.

6.9.4.2. Changes to Kamailio Proxy Configuration

A new configuration template: /etc/ngcp/config/templates/etc/kamailio/proxy/probe.cfg.tt2 is introduced to handle outbound probing requests.

6.9.4.3. Database Changes

A new DB column: provisioning.voip_peer_hosts.probe with type TINYINT(1) (boolean) is added to the DB schema.

A peer status change will populate the kamailio.dispatcher table, inserting the SIP URI in format sip:$ip:$port;transport=$transport in dispatcher group 100, which defines the probing group for peering servers.

Also the kamailio.dispatcher.attrs column is populated with a parameter peerid=$id. This ID is used during probing to load the peer preferences: outbound_socket and lbrtp_set, that are required to properly route the probing request.

6.10. Voicemail System

6.10.1. Accessing the IVR Menu

For a subscriber to manage his voicebox via IVR, there are two ways to access the voicebox. One is to call the URI voicebox@yourdomain from the subscriber itself, allowing password-less access to the IVR, as the authentication is already done on SIP level. The second is to call the URI voiceboxpass@yourdomain from any number, causing the system to prompt for a mailbox and the PIN. The PIN can be set in the Voicemail and Voicebox section of the Subscriber Preferences.

6.10.1.1. Mapping numbers and codes to IVR access

Since access might need to be provided from external networks like PSTN/Mobile, and since certain SIP phones do not support calling alphanumeric numbers to dial voicebox, you can map any number to the voicebox URIs using rewrite rules.

To do so, you can provision a match pattern e.g. ^(00|\+)12345$ with a replace pattern voicebox or voiceboxpass to map a number to either password-less or password-based IVR access respectively. Create a new rewrite rule with the Inbound direction and the Callee field in the corresponging rewrite rule set.

For inbound calls from external networks, assign this rewrite rule set to the corresponding incoming peer. If you also need to map numbers for on-net calls, assign the rewrite rule set to subscribers or the whole SIP domain.

6.10.1.2. External IVR access

When reaching voiceboxpass, the subscriber is prompted for her mailbox number and a password. All numbers assigned to a subscriber are valid input (primary number and any alias number). By default, the required format is in E.164, so the subscriber needs to enter the full number including country code, for example 4912345 if she got assigned a German number.

You can globally configure a rewrite rule in config.yml using asterisk.voicemail.normalize_match and asterisk.voicemail.normalize_replace, allowing you to customize the format a subscriber can enter, e.g. having ^0([1-9][0-9]+)$ as match part and 49$1 as replace part to accept German national format.

6.10.2. IVR Menu Structure

The following list shows you how the voicebox menu is structured.

1 Read voicemail messages
- 3 Advanced options
  - 3 To Hear messages Envelope
  - * Return to the main menu
- 4 Play previous message
- 5 Repeat current message
- 6 Play next message
- 7 Delete current message
- 9 Save message in a folder
  - 0 Save in new Messages
  - 1 Save in old Messages
  - 2 Save in Work Messages
  - 3 Save in Family Messages
  - 4 Save in Friends Messages
  - # Return to the main menu
2 Change folders
- 0 Switch to new Messages
- 1 Switch to old Messages
- 2 Switch to Work Messages
- 3 Switch to Family Messages
- 4 Switch to Friends Messages
- # Get Back
3 Advanced Options
- * To return to the main menu
0 Mailbox options
- 1 Record your unavailable message
  - 1 accept it
  - 2 Listen to it
  - 3 Rerecord it
- 2 Record your busy message
  - 1 accept it
  - 2 Listen to it
  - 3 Rerecord it
- 3 Record your name
  - 1 accept it
  - 2 Listen to it
  - 3 Rerecord it
- 4 Record your temporary greetings
  - 1 accept it / or re-record if one already exist
  - 2 Listen to it / or delete if one already exist
  - 3 Rerecord it
- 5 Change your password
- * To return to the main menu
* Help
# Exit

6.10.3. Type Of Messages

A message/greeting is a short message that plays before the caller is allowed to record a message. The message is intended to let the caller know that you are not able to answer their call. It can also be used to convey other information like when you will be available, other methods to contact you, or other options that the caller can use to receive assistance.

The IVR menu has three types of greetings.

6.10.3.1. Unavailable Message

The standard voice mail greeting is the "unavailable" greeting. This is used if you don’t answer the phone and so the call is directed to your voice mailbox.

You can record a custom unavailable greeting.
If you have not recorded your unavailable greeting but have recorded your name, the system will play a generic message like: "Recorded name is unavailable."
If you have not recorded your unavailable greeting, the phone system will play a generic message like: "Digits-of-number-dialed is unavailable".

6.10.3.2. Busy Message

If you wish, you can record a custom greeting used when someone calls you and you are currently on the phone. This is called your "Busy" greeting.

You can record a custom busy greeting.
If you have not recorded your busy greeting but have recorded your name, the phone system will play a generic message: "Recorded name is busy."
If you have not recorded your busy greeting and have not recorded your name (see below), the phone system will play a generic message: "Digits-of-number-dialed is busy."

6.10.3.3. Temporary Greeting

You can also record a temporary greeting. If it exists, a temporary greeting will always be played instead of your "busy" or "unavailable" greetings. This could be used, for example, if you are going on vacation or will be out of the office for a while and want to inform people not to expect a return call anytime soon. Using a temporary greeting avoids having to change your normal unavailable greeting when you leave and when you come back.

6.10.4. Folders

The Voicemail system allows you to save and organize your messages into folders. There can be up to ten folders.

6.10.4.1. The Default Folder List

0 - New Messages
1 - Old Messages
2 - Work Messages
3 - Family Messages
4 - Friends Messages

When a caller leaves a message for you,the system will put the message into the "New Messages" folder. If you listen to the message, but do not delete the message or save the message to a different folder, it will automatically move the message to the "Old Messages" folder. When you first log into your mailbox, the Voicemail System will make the "New Messages" folder the current folder if you have any new messages. If you do not have any new messages the it will make the "Old Messages" folder the current folder.

6.10.5. Voicemail Languages Configuration

To add a new language or to change the pronunciation for an existing one, ensure that mode=new is defined in /etc/ngcp-config/templates/etc/asterisk/say.conf.tt2. Adjust the configuration in the same file using the manual in the beginning. Then, as usual, make the new configuration active.

6.10.6. Flowcharts with Voice Prompts

This section shows flowcharts of calls to the voicemail system. Flowcharts contain the name of prompts as they are identified among Asterisk voice prompts.

6.10.6.1. Listening to New Messages

Figure 41. Flowchart of Listening to New Messages

6.10.6.2. Changing Voicemail Folders

Figure 42. Flowchart of Changing Voicemail Folders

6.10.6.3. Mailbox Options

Figure 43. Flowchart of Changing Mailbox Options

6.10.6.4. Leaving a Message

Figure 44. Flowchart of Leaving a Voice Message

6.11. Configuring Subscriber IVR Language

The language for the Voicemail system IVR or Vertical Service Codes (VSC) IVRs may be set using the subscriber or domain preference language.

Set Subscriber IVR Language

The sip:provider CE provides the pre-installed prompts for the Voicemail in the English, Spanish, French and Italian languages and the pre-installed prompts for the Vertical Service Codes IVRs in English only.

The other IVRs such as the Conference system and the error announcements use the Sound Sets configured in NGCP Panel and uploaded by the administrator in his language of choice.

6.12. Sound Sets

The sip:provider CE provides the administrator with ability to upload the voice prompts such as conference prompts or call error announcements on the Sound Sets page. There is a preference sound_set in the NAT and Media Flow Control section on Domain and Subscriber levels to link subscribers to the sound set that they should hear (as usual the subscriber preference overrides the domain one). Sound Sets can be defined in Settings→Sound Sets. To create a new Sound Set, click Create Sound Set. Then click the Files button.

Create a Sound Set

info
info	You may use 8 or 16 bit mono WAV audio files for all of the voice prompts.

6.12.1. Configuring Early Reject Sound Sets

The call error announcements are grouped under Early Rejects section. Unfold the section and click Upload next to the sound handles (Names) that you want to use. Choose a WAV file from your file system, and click the Loopplay setting if you want to play the file in a loop instead of just once. Click Save to upload the file.

Early Reject Sounds

The call error announcements are played to the user in early media hence the name "Early Reject". If you don’t provide the sound files for any handles they will not be used and the sip:provider CE will fallback to sending the error response code back to the user.

The exact error status code and text are configurable in the /etc/ngcp-config/config.yml file, in kamailio.proxy.early_rejects section. Please look for the announcement handle listed in below table in order to find it in the configuration file.

Table 4. Early Reject Announcements

Handle	Description	Message played
`announce_before_cf`	This is an announcement that the calling party hears before the call is being forwarded (Unconditional and Not Available cases) to the destination. The feature can be activated with Applications / `play_announce_before_cf` domain or subscriber preference.	N/A (custom message, no default)
`block_in`	This is what the calling party hears when a call is made from a number that is blocked by the incoming block list (adm_block_in_list, block_in_list customer/subscriber preferences)	Your call is blocked by the number you are trying to reach.
`block_out`	This is what the calling party hears when a call is made to a number that is blocked by the outgoing block list (adm_block_out_list, block_out_list customer/subscriber preferences)	Your call to the number you are trying to reach is blocked.
`block_ncos`	This is what the calling party hears when a call is made to a number that is blocked by the NCOS level assigned to the subscriber or domain (the NCOS level chosen in ncos and adm_ncos preferences). PLEASE NOTE: It is not possible to configure the status code and text.	Your call to the number you are trying to reach is not permitted.
`block_override_pin_wrong`	Announcement played to calling party if it used wrong PIN code to override the outgoing user block list or the NCOS level for this call (the PIN set by block_out_override_pin and adm_block_out_override_pin preferences)	The PIN code you have entered is not correct.
`callee_busy`	Announcement played on incoming call to the subscriber which is currently busy (486 response from the UAS)	The number you are trying to reach is currently busy. Please try again later.
`callee_offline`	Announcement played on incoming call to the subscriber which is currently not registered	The number you are trying to reach is currently not available. Please try again later.
`callee_tmp_unavailable`	Announcement played on incoming call to the subscriber which is currently unavailable (408, other 4xx or no response code or 30x with malformed contact)	The number you are trying to reach is currently not available. Please try again later.
`callee_unknown`	Announcement that is played on call to unknown or invalid number (not associated with any of our subscribers/hunt groups)	The number you are trying to reach is not in use.
`cf_loop`	Announcement played when the called subscriber has the call forwarding configured to itself	The number you are trying to reach is forwarded to an invalid destination.
`emergency_geo_unavailable`	Announcement played when emergency destination is dialed but the destination is not provisioned for the location of the user. PLEASE NOTE: The configuration entry for this case in `/etc/ngcp-config/config.yml` file is `emergency_invalid`.	The emergency number you have dialed is not available in your region.
`emergency_unsupported`	Announcement played when emergency destination is dialed but the emergency calls are administratively prohibited for this user or domain (reject_emergency preference is enabled)	You are not allowed to place emergency calls from this line. Please use a different phone.
`error_please_try_later`	Announcement played when the call is handled by 3rd party call control (PCC) and there was an error during call processing. PLEASE NOTE: This announcement may be configured in the sound set in `voucher_recharge` section.	An error has occured. Please try again later.
`invalid_speeddial`	This is what the calling party hears when it calls an empty speed-dial slot	The speed dial slot you are trying to use is not available.
`locked_in`	Announcement played on incoming call to a subscriber that is locked for incoming calls	The number you are trying to reach is currently not permitted to receive calls.
`locked_out`	Announcement played on outgoing call to subscriber that is locked for outgoing calls	You are currently not allowed to place outbound calls.
`max_calls_in`	Announcement played on incoming call to a subscriber who has exceeded the concurrent_max limit by sum of incoming and outgoing calls or whose customer has exceeded the concurrent_max_per_account limit by sum of incoming and outgoing calls	The number you are trying to reach is currently busy. Please try again later.
`max_calls_out`	Announcement played on outgoing call to a subscriber who has exceeded the concurrent_max (total limit) or concurrent_max_out (limit on number of outbound calls) or whose customer has exceeded the concurrent_max_per_account or concurrent_max_out_per_account limit	All outgoing lines are currently in use. Please try again later.
`max_calls_peer`	Announcement played on calls from the peering if that peer has reached the maximum number of concurrent calls (configured by admin in concurrent_max preference of peering server). PLEASE NOTE: There is no configuration option of the status code and text in `config.yml` file for this case.	The network you are trying to reach is currently busy. Please try again later.
`no_credit`	Announcement played when prepaid account has insufficient balance to make a call to this destination	You don’t have sufficient credit balance for the number you are trying to reach.
`peering_unavailable`	Announcement played in case of outgoing off-net call when there is no peering rule matching this destination and/or source	The network you are trying to reach is not available.
`reject_vsc`	When the VSC (Vertical Service Code) service is disabled in domain or subscriber preferences (Access Restrictions / `reject_vsc` is set to TRUE) and a subscriber tries to make a call with VSC, an announcement is played.	N/A (custom message, no default)
`relaying_denied`	Announcement played on inbound call from trusted IP (e.g. external PBX) with non-local Request-URI domain	The network you are trying to reach is not available.
`unauth_caller_ip`	This is what the calling party hears when it tries to make a call from unauthorized IP address or network (allowed_ips, man_allowed_ips preferences)	You are not allowed to place calls from your current network location.
`voicebox_unavailable`	PLEASE NOTE: This announcement is already obsolete, as of NGCP version mr5.3	The voicemail of the number you are trying to reach is currently not available. Please try again later.

There are some early reject scenarios when either no voice announcement is played, or a fixed announcement is played. In either case a SIP error status message is sent from NGCP to the calling party. It is possible to configure the exact status code and text for such cases in the /etc/ngcp-config/config.yml file, in kamailio.proxy.early_rejects section. The below table gives an overview of those early reject cases.

Table 5. Additional Early Reject Reason Codes

Handle	Description
`block_admin`	Caller blocked by `adm_block_in_list, adm_block_in_clir` and callee blocked by `adm_block_out_list` (customer or subscriber preference)
`block_callee`	Callee blocked by subscriber preference `block_out_list`
`block_caller`	Caller blocked by subscriber preference `block_in_list, block_in_clir`
`block_contract`	Caller blocked by customer preference `block_in_list, block_in_clir` and callee blocked by customer preference `block_out_list`
`callee_tmp_unavailable_gp`	Callee is a PBX group with 0 members. Announcement `callee_tmp_unavailable` is played; status code and text can be configured.
`callee_tmp_unavailable_tm`	Callee is a PBX group and we have a timeout (i.e. no group member could be reached). Announcement `callee_tmp_unavailable` is played; status code and text can be configured.
`emergency_invalid`	PLEASE NOTE: This handle refers to the same early reject case as `emergency_geo_unavailable`, but is labeled differently in the configuration file.

6.13. Conference System

The sip:provider CE provides the simple pin-protected conferencing service built using the SEMS DSM scripting language. Hence it is open for all kinds of modifications and extensions.

Template files for the sems conference scripts stored in /etc/ngcp-config/templates/etc/ngcp-sems/:

IVR script: /etc/ngcp-config/templates/etc/ngcp-sems/dsm/confpin.dsm.tt2
Config: /etc/ngcp-config/templates/etc/ngcp-sems/dsm/confpin.conf.tt2

6.13.1. Configuring Call Forward to Conference

Go to your Subscriber Preferences and click Edit on the Call Forward Type you want to set (e.g. Call Forward Unconditional).

Configure Call Forward to Conference

You should select Conference option in the Destination field and leave the URI/Number empty. The timeout defines for how long this destination should be tried to ring.

6.13.2. Configuring Conference Sound Sets

Sound Sets can be defined in Settings→Sound Sets. To create a new Sound Set, click Create Sound Set. Then click the Files button.

Conference Sounds

Upload the following files:

Table 6. Conference Sound Sets

Handle	Message played
conference_greeting	Welcome to the conferencing service.
conference_pin	Please enter your PIN, followed by the pound key.
conference_pin_wrong	You have entered an invalid PIN number. Please try again.
conference_joined	You will be placed into the conference.
conference_first	You are the first person in the conference.
conference_join	A person has joined the conference.
conference_leave	A person has left the conference.
conference_max_participants	All conference lines are currently in use. Please try again later.
conference_waiting_music	…waiting music…
goodbye	Goodbye.

info
info	You may use 8 or 16 bit mono WAV audio files.

Then set the preference sound_set on the Domain or Subscriber level in order to assign the Sound Set you have just created to the subscriber (as usual the subscriber preference overrides the domain one).

6.13.3. Joining the Conference

There are 2 ways of joining a conference: with or without PIN code. The actual way of joining the conference depends on Subscriber settings. A subscriber who has activated the conference through call forwarding may set a PIN in order to protect the conference from unauthorized access. To activate the PIN one has to enter a value in Subscriber → Details → Preferences → Internals → conference_pin field.

Figure 45. Setting Conference PIN

In case the PIN protection for the conference is activated, when someone calls the subscriber who has enabled the conference, the caller is prompted to enter the PIN of the conference. Upon the successful entry of the PIN the caller hears the announcement that he is going to be placed into the conference and at the same time this is announced to all participants already in the conference.

6.13.4. Conference Flowchart with Voice Prompts

The following 2 sections show flowcharts with voice prompts that are played to a caller when he dials the conference.

6.13.4.1. Conference Flowchart with PIN Validation

Figure 46. Flowchart of Conference with PIN Validation

6.13.4.2. Conference Flowchart without PIN

Figure 47. Flowchart of Conference without PIN

6.14. Malicious Call Identification (MCID)

MCID feature allows customers to report unwanted calls to the platform operator.

6.14.1. Setup

To enable the feature first edit config.yml and enable there apps: malicious_call: yes and kamailio: store_recentcalls: yes. The latter option enables kamailio to store recent calls per subscrbriber UUID in the redis DB (the amount of stored recent calls will not exceed the amount of provisionined subscribers).

Next step is to create a system sound set for the feature. In Settings→Sound Sets either use your already existing Sound Set or create a new Sound Set and then assign it to your domain or subscribers. In the Sound Set there is a fileset malicious_call_identification→mailicious_call_report for that purpose.

Once the Sound Set is created the Subscriber’s Preferences Malicious Call Identification must be enabled under Subcriber → Preferences → Applications menu. The same parameter can be set in the Customer’s preferences to enable this feature for all its subscribers.

The final step is to create a new Rewrite Rule and to route calls to, for instance *123 → MCID application. For that you create a Calee Inbound rewrite rule ^(\*123)$ → malicious_call

Finaly you run ngcpcfg apply Enabling MCID to recreate the templates and automatically restart depended services.

6.14.2. Usage

As a subscriber, to report a malicious call you call to either malicious_call or to your custom number assigned for that purpose. Please note that you can report only your last received call. You will hear the media reply from the Sound Set you have previosuly configured.

To check reported malicious calls as the plafrom operator open Settings→Malicious Calls tab where you will see a list of registered calls. You can selectively delete records from the list and alternatively you can manage the reported calls by using the REST API.

6.14.3. Advanced configuration

By default the expiration time for the most recent call per subscriber is 3600 seconds (1 hour). If you wish to prolong or shorten the expiration time open constants.yml and set there recentcalls: expire: 3600 to a new value, and issue ngcpcfg apply Enabling MCID afterwards.

6.15. Subscriber Profiles

The preferences a subscriber can provision by himself via the CSC can be limited via profiles within profile sets assigned to subscribers.

6.15.1. Subscriber Profile Sets

Profile sets define containers for profiles. The idea is to define profile sets with different profiles by the administrator (or the reseller, if he is permitted to do so). Then, a subscriber with administrative privileges can re-assign profiles within his profile sets for the subscribers of his customer account.

Profile Sets can be defined in Settings→Subscriber Profiles. To create a new Profile Set, click Create Subscriber Profile Set.

Create Subscriber Profile Set

You need to provide a reseller, name and description.

To create Profiles within a Profile Set, hover over the Profile Set and click the Profiles button.

Profiles within a Profile Set can be created by clicking the Create Subscriber Profile button.

Create Subscriber Profile

Checking the Default Profile option causes this profile to get assigned automatically to all subscribers, who have the profile set assigned. Other options define the user preferences which should be made available to the subscriber.

info
info	When the platform administrator selects Preferences of the Subscriber Profile he will get an empty page like in the picture below, if none or only certain options are selected in the Subscriber Profile.

Empty Subscriber Profile

Some of the options, like ncos (NCOS level), will enable the definition of that preference within the Subscriber Profile Preferences. Thus all subscribers who have this profile assigned to will have the preference activated by default. The below picture shows the preferences linked to the sample Subscriber Profile:

Subscriber Profile with NCOS Preferences

6.16. SIP Loop Detection

In order to detect a SIP loop ( incoming call as a response for a call request ) sip:provider CE checks the combination of SIP-URI, To and From headers.

This check can be enabled in config.yml by setting kamailio.proxy.loop_detection.enable: 'yes'. The system tolerates kamailio.proxy.loop_detection.max loops within kamailio.proxy.loop_detection.expire seconds. Higher occurrence of loops will be reported with a SIP 482 "Loop Detected" error message

6.17. Invoices and Invoice Templates

Content and vision of the invoices are customizable by invoice templates Section 6.17.3, “Invoice Templates”.

info
info	The sip:provider CE generates invoices in pdf format.

6.17.1. Invoices Management

Invoices can be requested for generation, searched, downloaded and deleted on the administrative web interface. Navigate to Settings → Invoices menu and you get a list of all invoices currently stored in the database.

tip
tip	The system operator or a third party application can also generate, list, retrieve and delete invoices via the REST API. Please read further details here Section 6.17.2, “Invoice Management via REST API”.

Invoice management interface

To request invoice generation for the particular customer and period press "Create invoice" button. On the invoice creation form following parameters are available for selection:

Template: any of existent invoice template can be selected for the invoice generation.
Customer: owner of the billing account, recipient of the invoice.
Invoice period: billing period. Can be specified only as one calendar month. Calls with start time between first and last second of the period will be considered for the invoice

All form fields are mandatory.

Invoice creation form

Generated invoice can be downloaded as pdf file.

Invoice created view

To do it press button "Download" against invoice in the invoice management interface.

Respectively press on the button "Delete" to delete invoice.

6.17.2. Invoice Management via REST API

Besides managing invoices on the admin web interface of NGCP, the system administrator (or a third party system) has the opportunity to request generation and retrieval of invoices via the REST API.

The subsequent sections describe the available operations for invoice management with API requests in details. All operations work on the Invoices resource and use the /api/invoices base path. The authentication method is username/password in the examples given below, however it is recommended to use a TLS client certificate for authentication on the REST API.

info
info	The full API documentation is always available at the location: `https://<IP_of_NGCP_web_panel>:1443/api`

6.17.2.1. Generate a New Invoice

The prerequisite for generating a new invoice is that the customer has to have an invoice template assigned to him.

The following example shows a CURL command that will request generation of an invoice:

for customer with ID "79"
for the time period of November 2017
based on the invoice template with ID "1"

curl -i -X POST -H 'Connection: close' -H 'Content-Type: application/json' \
  --user adminuser:adminpwd -k 'https://127.0.0.1:1443/api/invoices/'      \
  --data-binary '{ "customer_id" : "79", "template_id" : "1",              \
  "period_start": "2017-11-01 00:00:00", "period_end": "2017-11-30 23:59:59"  }'

Please note that in this operation we used the /api/invoices path (the invoices collection) and a POST request on it to create a new invoice item.

In case of a successful operation, NGCP will reply with 201 Created HTTP status and send the ID of the invoice in Location header. In our example the new invoice item may be directly referred as /api/invoices/3 (ID = 3).

HTTP/1.1 201 Created
Server: nginx
Date: Tue, 14 Nov 2017 13:38:40 GMT
Content-Length: 0
Connection: close
Location: /api/invoices/3
Set-Cookie: ngcp_panel_session=d5e4a8dd003fd7cac646653a6b5aefa703cf3e66; path=/; expires=Tue, 14-Nov-2017 14:38:38 GMT; HttpOnly
X-Catalyst: 5.90114
Strict-Transport-Security: max-age=15768000

In case of a failed operation, e.g. when we request an invoicing period that is invalid for the customer, NGCP will reply with 422 Unprocessable Entity or 500 Internal Server Error HTTP status.

6.17.2.2. Download Invoice Data

You can download properties / data of a specific invoice by selecting the item by its ID, using an HTTP GET request.

curl -i -X GET -H 'Connection: close' --user adminuser:adminpwd -k 'https://127.0.0.1:1443/api/invoices/3'

The above request will return a JSON data structure containing invoice properties:

HTTP/1.1 200 OK
Server: nginx
Date: Wed, 15 Nov 2017 12:13:04 GMT
Content-Type: application/hal+json; profile="http://purl.org/sipwise/ngcp-api/"; charset=utf-8
Content-Length: 759
Connection: close
Link: </api/invoices/>; rel=collection
Link: <http://purl.org/sipwise/ngcp-api/>; rel=profile
Link: </api/invoices/3>; rel="item self"
Link: </api/invoices/3>; rel="item http://purl.org/sipwise/ngcp-api/#rel-invoices"
Link: </api/customers/79>; rel="item http://purl.org/sipwise/ngcp-api/#rel-customers"
Set-Cookie: ngcp_panel_session=219feccbee4fa936defd1ee511c84efe7b5a6d6a; path=/; expires=Wed, 15-Nov-2017 13:13:03 GMT; HttpOnly
Strict-Transport-Security: max-age=15768000

{
   "_links" : {
      "collection" : {
         "href" : "/api/invoices/"
      },
      "curies" : {
         "href" : "http://purl.org/sipwise/ngcp-api/#rel-{rel}",
         "name" : "ngcp",
         "templated" : true
      },
      "ngcp:customers" : {
         "href" : "/api/customers/79"
      },
      "ngcp:invoices" : {
         "href" : "/api/invoices/3"
      },
      "profile" : {
         "href" : "http://purl.org/sipwise/ngcp-api/"
      },
      "self" : {
         "href" : "/api/invoices/3"
      }
   },
   "amount_net" : 0,
   "amount_total" : 0,
   "amount_vat" : 0,
   "id" : 3,
   "period_end" : "2017-11-30T23:59:59+00:00",
   "period_start" : "2017-11-01T00:00:00+00:00",
   "sent_date" : null,
   "serial" : "INV2017110000003"
}

It is also possible to query the complete invoices collection and use a filter (e.g. invoicing period, customer ID, etc.) to get the desired invoice item. In the example below we request all available invoices that belong to the customer with ID "79".

curl -i -X GET -H 'Connection: close' --user adminuser:adminpwd -k 'https://127.0.0.1:1443/api/invoices/?customer_id=79'

The returned dataset is now slightly different because it is represented as an array of items, although in our example the array consist of only 1 item:

{
   "_embedded" : {
      "ngcp:invoices" : [
         {
            "_links" : {
               "collection" : {
                  "href" : "/api/invoices/"
               },
               "curies" : {
                  "href" : "http://purl.org/sipwise/ngcp-api/#rel-{rel}",
                  "name" : "ngcp",
                  "templated" : true
               },
               "ngcp:customers" : {
                  "href" : "/api/customers/79"
               },
               "ngcp:invoices" : {
                  "href" : "/api/invoices/3"
               },
               "profile" : {
                  "href" : "http://purl.org/sipwise/ngcp-api/"
               },
               "self" : {
                  "href" : "/api/invoices/3"
               }
            },
            "amount_net" : 0,
            "amount_total" : 0,
            "amount_vat" : 0,
            "id" : 3,
            "period_end" : "2017-11-30T23:59:59+00:00",
            "period_start" : "2017-11-01T00:00:00+00:00",
            "sent_date" : null,
            "serial" : "INV2017110000003"
         }
      ]
   },
   "_links" : {
      "curies" : {
         "href" : "http://purl.org/sipwise/ngcp-api/#rel-{rel}",
         "name" : "ngcp",
         "templated" : true
      },
      "ngcp:invoices" : {
         "href" : "/api/invoices/3"
      },
      "profile" : {
         "href" : "http://purl.org/sipwise/ngcp-api/"
      },
      "self" : {
         "href" : "/api/invoices/?page=1&rows=10"
      }
   },
   "total_count" : 1
}

6.17.2.3. Download Invoice as PDF File

You can download a specific invoice as a PDF file in the following way:

selecting the item by its ID (as in our example, but you can also use a filter and query the complete invoices collection)
using an HTTP GET request
adding "Accept: application/pdf" header to the request

curl -X GET -H 'Connection: close' -H 'Accept: application/pdf' \
  --user adminuser:adminpwd -k 'https://127.0.0.1:1443/api/invoices/3' > result.pdf

Please note that in the example above we do not add the "-i" option that would also include the headers of the HTTP response in the output file. The output of the CURL command, i.e. the PDF file, is saved as "result.pdf" locally.

6.17.2.4. Delete an Invoice

In order to delete an invoice item you have to send a DELETE request on the specific item:

curl -i -X DELETE -H 'Connection: close' --user adminuser:adminpwd -k 'https://127.0.0.1:1443/api/invoices/3'

In case of successful deletion NGCP should send HTTP status 204 No Content as a response:

HTTP/1.1 204 No Content
Server: nginx
Date: Wed, 15 Nov 2017 13:42:42 GMT
Connection: close
Set-Cookie: ngcp_panel_session=10b66a6baf25a09739c2bb2377c70ecceee78387; path=/; expires=Wed, 15-Nov-2017 14:42:42 GMT; HttpOnly
X-Catalyst: 5.90114
Strict-Transport-Security: max-age=15768000

6.17.3. Invoice Templates

Invoice template defines structure and look of the generated invoices. The sip:provider CE makes it possible to create some invoice templates. Multiple invoice templates can be used to send invoices to the different customers using different languages.

important
important	At least one invoice template should be created to enable invoice generation. Each customer has to be associated to one of the existent invoice template, otherwise invoices will be not generated for this customer.

Customer can be linked to the invoice template in the customer interface.

6.17.3.1. Invoice Templates Management

Invoice templates can be searched, created, edited and deleted in the invoice templates management interface.

Invoice templates management interface

Invoice template creation is separated on two steps:

Register new invoice template meta information.
Edit content (template itself) of the invoice template.

To register new invoice template press "Create Invoice Template" button.

On the invoice template meta information form following parameters can be specified:

Reseller: reseller who owns this invoice template. Please note, that it doesn’t mean that the template will be used for the reseller customers by default. After creation, invoice template still need to be linked to the reseller customers.
Name: unique invoice template name to differentiate invoice templates if there are some.
Type: currently sip:provider CE supports only svg format of the invoice templates.

All form fields are mandatory.

Invoice template creation form

After registering new invoice template you can change invoice template structure in WYSIWYG SVG editor and preview result of the invoice generation based on the template.

6.17.3.2. Invoice Template Content

Invoice template is a XML SVG source, which describes content, look and position of the text lines, images or other invoice template elements. The sip:provider CE provides embedded WYSIWYG SVG editor svg-edit 2.6 to customize default template. The sip:provider CE svg-edit has some changes in layers management, image edit, user interface, but this basic introduction still may be useful.

Template refers to the owner reseller contact ("rescontact"), customer contract ("customer"), customer contact ("custcontact"), billing profile ("billprof"), invoice ("invoice") data as variables in the "[%%]" mark-up with detailed information accessed as field name after point e.g. [%invoice.serial%]. During invoice generation all variables or other special tokens in the "[% %]" mark-ups will be replaced by their database values.

Press on "Show variables" button on invoice template content page to see full list of variables with the fields:

Invoice template available variables

You can add/change/remove embedded variables references directly in main svg-edit window. To edit text line in svg-edit main window double click on the text and place cursor on desired position in the text.

After implementation of the desired template changes, invoice template should be saved Section 6.17.3.3, “Save and preview invoice template content”.

To return to the sip:provider CE invoice template default content you can press on the "Discard changes" button.

important
important	"Discard changes" operation can’t be undone.

Layers

Default template contains three groups elements (<g/>), which can be thinked of as pages, or in terms of svg-edit - layers. Layers are:

Background: special layer, which will be repeated as background for every other page of the invoice.
Summary: page with a invoice summary.
CallList: page with calls made in a invoice period. Is invisible by default.

To see all invoice template layers, press on "Layers" vertical sign on right side of the svg-edit interface:

Invoice template layers

Side panel with layers list will be shown.

Invoice template layers open

One of the layers is active, and its element can be edited in the main svg-edit window. Currently active layer’s name is bold in the layers list. The layers may be visible or invisible. Visible layers have "eye" icon left of their names in the layers list.

To make a layer active, click on its name in the layers list. If the layer was invisible, its elements became visible on activation. Thus you can see mixed elements of some layers, then you can switch off visibility of other layers by click on their "eye" icons. It is good idea to keep visibility of the "Background" layer on, so look of the generated page will be seen.

Edit SVG XML source

Sometimes it may be convenient to edit svg source directly and svg-edit makes it possible to do it. After press on the <svg> icon in the top left corner of the svg-edit interface:

Invoice xml source button

SVG XML source of the invoice template will be shown.

SVG source can be edited in place or just copy-pasted as usual text.

info
info	Template keeps sizes and distances in pixels.

important

When edit svg xml source, please change very carefully and thinkfully things inside special comment mark-up "<!--{ }-→". Otherwise invoice generation may be broken. Please be sure that document structure repeats default invoice template: has the same groups (<g/>) elements on the top level, text inside special comments mark-up "<!--{ }-→" preserved or changed appropriately, svg xml structure is correct.

To save your changes in the svg xml source, first press "OK" button on the top left corner of the source page:

Save xml source changes

And then save invoice template changes Section 6.17.3.3, “Save and preview invoice template content”.

info
info	You can copy and keep the svg source of your template as a file on the disk before start experimenting with the template. Later you will be able to return to this version replacing svg source.

Change logo image

Make sure that "Select tool" is active.
Select default logo, clicking on the logo image.
Press "Change image" button, which should appear on the top toolbar.

Steps to change the image

After image uploaded save invoice template changes Section 6.17.3.3, “Save and preview invoice template content”.

6.17.3.3. Save and preview invoice template content

To save invoice template content changes press button "Save SVG".

Save invoice template

You will see message about successfully saved template. You can preview your invoice look in PDF format. Press on "Preview as PDF" button.

Preview invoice template

Invoice preview will be opened in the new window.

info
info	Example fake data will be used for preview generation.

Preview invoice as PDF

6.17.4. Invoices Generation

Besides generating invoices on demand using web interface, Sipwise NGCP contains an invoice generator script that allows for producing invoices automatically, at regular intervals, for all customers, using the cron system tool.

warning
warning	Automated invoice generation is deprecated since mr4.0 release of NGCP. The invoice generator script will damage billing records in the database. The rest of the description in "Invoices Generation" section is kept in the handbook for reference purposes only.

Script is located at: /usr/share/ngcp-panel/tools/generate_invoices.pl

In short:

To generate and immediately send invoices for the previous month:

perl /usr/share/ngcp-panel/tools/generate_invoices.pl --send --prevmonth

To generate invoices for the previous month without sending:

perl /usr/share/ngcp-panel/tools/generate_invoices.pl --prevmonth

To send already generated invoices for the previous month:

perl /usr/share/ngcp-panel/tools/generate_invoices.pl --sendonly --prevmonth

Regenerate invoices for the specified period:

perl /usr/share/ngcp-panel/tools/generate_invoices.pl --stime="2015-01-01 00:00:00"  --etime="2015-01-31 00:00:00" --regenerate

Some not obvious options:

*--allow_terminated* Generates invoices for the terminated contracts too.
*--force_unrated* Generate invoices despite unrated calls existence in the specified generation period.
*--no_empty* Skip invoices for the contracts without calls in the specified period and with null permanent fee for the billing profile.

To see all possible script options use --help or --man:

/usr/share/ngcp-panel/tools/generate_invoices.pl --man

Script will be run periodically as configured by the cron files. Cron files templates can be found at:

/etc/ngcp-config/templates/etc/cron.d/ngcp-invoice-gen.tt2
/etc/ngcp-config/templates/etc/cron.d/ngcp-invoice-gen.services

After applying your configuration cron file will be located at:

/etc/cron.d/ngcp-invoice-gen

Script uses configuration file located at: /etc/ngcp-invoice-gen/invoice-gen.conf

Except common DB connection configuration following specific options can be defined in the config file:

RESELLER_ID 1,2,3,…N

Comma separated resellers id. Invoice generation will be performed only for the specified resellers.

CLIENT_CONTRACT_ID 1,2,3,…N

Comma separated customers id. Invoice generation will be performed only for the specified customers.

STIME YYYY-mm-DD HH:MM:SS

Usually is not necessary. Script option --prevmonth will define correct start and end time for the previous month billing period. Generated invoices will include all calls with call start time more then STIME value and less the ETIME value.

ETIME YYYY-mm-DD HH:MM:SS

SEND [0|1]

Generated invoices will be immediately sent to the customers.

RESEND [0|1]

Invoices, already sent to the customers, will be sent again.

REGENERATE [0|1]

Already presented invoices files will be generated again. Otherwise they will stay intouched.

ALLOW_TERMINATED [0|1]

Generate invoices for the already terminated customers too.

ADMIN_EMAIL your@email.com

Purposed for notifications about invoices generation fails. Not in use now.

All generated invoices can be seen in the invoice management interface Section 6.17.1, “Invoices Management”.

On request each invoice will be sent to the proper customer as e-mail with the invoice PDF in the attachment. Letter content is defined by the invoice email template.

6.18. Email Reports and Notifications

6.18.1. Email events

The sip:provider CE makes it possible to customize content of the emails sent on the following actions:

Web password reset requested. Email will be sent to the subscriber, whom password was requested for resetting. If the subscriber doesn’t have own email, letter will be sent to the customer, who owns the subscriber.
New subscriber created. Email will be sent to the newly created subscriber or to the customer, who owns new subscriber.
Letter with the invoice. Letter will be sent to the customer.

6.18.2. Initial template values and template variables

Default email templates for each of the email events are inserted on the initial sip:provider CE database creation. Content of the default template is described in the corresponding sections. Default email templates aren’t linked to any reseller and can’t be changed through sip:provider CE Panel. They will be used to initialize default templates for the newly created reseller.

Each email template refers to the values from the database using special mark-ups "[%" and "%]". Each email template has fixed set of the variables. Variables can’t be added or changed without changes in the sip:provider CE Panel code.

6.18.3. Password reset email template

Email will be sent after subscriber or subscriber administrator requested password reset for the subscriber account. Letter will be sent to the subscriber. If subscriber doesn’t have own email, letter will be sent to the customer owning the subscriber.

Default content of the password reset email template is:

Template name	passreset_default_email
From	default@sipwise.com
Subject	Password reset email
Body	Dear Customer, Please go to [%url%] to set your password and log into your self-care interface. Your faithful Sipwise system -- This is an automatically generated message. Do not reply.

Following variables will be provided to the email template:

[%url%]: specially generated url where subscriber can define his new password.
[%subscriber%]: username@domain of the subscriber, which password was requested for reset.

6.18.4. New subscriber notification email template

Email will be sent on the new subscriber creation. Letter will be sent to the newly created subscriber if it has an email. Otherwise, letter will be sent to the customer who owns the subscriber.

info
info	By default email content template is addressed to the customer. Please consider this when create the subscriber with an email.

Template name	subscriber_default_email
From	default@sipwise.com
Subject	Subscriber created
Body	Dear Customer, A new subscriber [%subscriber%] has been created for you. Your faithful Sipwise system -- This is an automatically generated message. Do not reply.

Following variables will be provided to the email template:

[%url%]: specially generated url where subscriber can define his new password.
[%subscriber%]: username@domain of the subscriber, which password was requested for reset.

6.18.5. Invoice email template

Template name	invoice_default_email
From	default@sipwise.com
Subject	Invoice #[%invoice.serial%] from [%invoice.period_start_obj.ymd%] to [%invoice.period_end_obj.ymd%]
Body	Dear Customer, Please find your invoice #[%invoice.serial%] for [%invoice.period_start_obj.month_name%], [%invoice.period_start_obj.year%] in attachment of this letter. Your faithful Sipwise system -- This is an automatically generated message. Do not reply.

Variables passed to the email template:

[%invoice%]: container variable for the invoice information.

info	Invoice fields
[%invoice.serial%] [%invoice.amount_net%] [%invoice.amount_vat%] [%invoice.amount_total%] [%invoice.period_start_obj%] [%invoice.period_end_obj%] The fields [%invoice.period_start_obj%] and [%invoice.period_end_obj%] provide methods of the perl package DateTime for the invoice start date and end date. Further information about DateTime can be obtained from the package documentation: man DateTime

info

Invoice fields

[%invoice.serial%]
[%invoice.amount_net%]
[%invoice.amount_vat%]
[%invoice.amount_total%]
[%invoice.period_start_obj%]
[%invoice.period_end_obj%]

The fields [%invoice.period_start_obj%] and [%invoice.period_end_obj%] provide methods of the perl package DateTime for the invoice start date and end date. Further information about DateTime can be obtained from the package documentation:

man DateTime

[%provider%]: container variable for the reseller contact. All database contact values will be available.
[%client%]: container variable for the customer contact.

info	Contact fields example for the "provider". Replace "provider" to client to access proper "customer" contact fields.
[%provider.gender%] [%provider.firstname%] [%provider.lastname%] [%provider.comregnum%] [%provider.company%] [%provider.street%] [%provider.postcode%] [%provider.city%] [%provider.country%] [%provider.phonenumber%] [%provider.mobilenumber%] [%provider.email%] [%provider.newsletter%] [%provider.faxnumber%] [%provider.iban%] [%provider.bic%] [%provider.vatnum%] [%provider.bankname%] [%provider.gpp0 - provider.gpp9%]

info

Contact fields example for the "provider". Replace "provider" to client to access proper "customer" contact fields.

[%provider.gender%]
[%provider.firstname%]
[%provider.lastname%]
[%provider.comregnum%]
[%provider.company%]
[%provider.street%]
[%provider.postcode%]
[%provider.city%]
[%provider.country%]
[%provider.phonenumber%]
[%provider.mobilenumber%]
[%provider.email%]
[%provider.newsletter%]
[%provider.faxnumber%]
[%provider.iban%]
[%provider.bic%]
[%provider.vatnum%]
[%provider.bankname%]
[%provider.gpp0 - provider.gpp9%]

6.18.6. Email templates management

Email templates linked to the resellers can be customized in the email templates management interface. For the administrative account email templates of all the resellers will be shown. Respectively for the reseller account only owned email templates will be shown.

Email templates management interface

To create create new email template press button "Create Email Template".

Email templates form

On the email template form all fields are mandatory:

Reseller: reseller who owns this email template.
Name: currently only email template with the following names will be considered by the sip:provider CE on the appropriate event Section 6.18.1, “Email events” :
- passreset_default_email;
- subscriber_default_email;
- invoice_default_email;
From Email Address: email address which will be used in the From field in the letter sent by the sip:provider CE.
Subject: Template of the email subject. Subject will be processed with the same template variables as the email body.
Body: Email text template. Will be processed with appropriate template variables.

6.19. The Vertical Service Code Interface

Vertical Service Codes (VSC) are codes a user can dial on his phone to provision specific features for his subscriber account. The format is *<code>*<value> to activate a specific feature, and #<code> or #<code># to deactivate it. The code parameter is a two-digit code, e.g. 72. The value parameter is the value being set for the corresponding feature.

important
important	The value user input is normalized using the Rewrite Rules Sets assigned to domain as described in Section 5.7, “Configuring Rewrite Rule Sets”.

By default, the following codes are configured for setting features. The examples below assume that there is a domain rewrite rule normalizing the number format 0<ac><sn> to <cc><ac><sn> using 43 as country code.

72 - enable Call Forward Unconditional e.g. to 431000 by dialing *72*01000, and disable it by dialing #72.
90 - enable Call Forward on Busy e.g. to 431000 by dialing *90*01000, and disable it by dialing #90.
92 - enable Call Forward on Timeout e.g. after 30 seconds of ringing to 431000 by dialing *92*30*01000, and disable it by dialing #92.
93 - enable Call Forward on Not Available e.g. to 431000 by dialing *93*01000, and disable it by dialing #93.
50 - set Speed Dial Slot, e.g. set slot 1 to 431000 by dialing *50*101000, which then can be used by dialing *1.
55 - set One-Shot Reminder Call e.g. to 08:30 by dialing *55*0830.
31 - set Calling Line Identification Restriction for one call, e.g. to call 431000 anonymously dial *31*01000.
32 - enable Block Incoming Anonymous Calls by dialing *32*, and disable it by dialing #32.
80 - call using Call Block Override PIN, number should be prefixed with a block override PIN configured in admin panel to disable the outgoing user/admin block list and NCOS level for a call. For example, when override PIN is set to 7890, dial *80*789001000 to call 431000 bypassing block lists.

6.19.1. Configuration of Vertical Service Codes

You can change any of the codes (but not the format) in /etc/ngcp-config/config.yml in the section sems→vsc. After the changes, execute ngcpcfg apply 'changed VSC codes'.

caution
caution	If you have the EMTAs under your control, make sure that the specified VSCs don’t overlap with EMTA-internal VSCs, because the VSC calls must be sent to the NGCP via SIP like normal telephone calls.

6.19.2. Voice Prompts for Vertical Service Code Configuration

Table 7. VSC Voice Prompts

Prompt Handle	Related VSC	Message
vsc_error	any	An error has occurred. Please try again later.
vsc_invalid	wrong code	Invalid feature code.
reject_vsc	any	Vertical service codes are disabled for this line.
vsc_cfu_on	72 (Call Forward Unconditional)	Your unconditional call forward has successfully been activated.
vsc_cfu_off	72 (Call Forward Unconditional)	Your unconditional call forward has successfully been deactivated.
vsc_cfb_on	90 (Call Forward Busy)	Your call forward on busy has successfully been activated.
vsc_cfb_off	90 (Call Forward Busy)	Your call forward on busy has successfully been deactivated.
vsc_cft_on	92 (Call Forward on Timeout)	Your call forward on ring timeout has successfully been activated.
vsc_cft_off	92 (Call Forward on Timeout)	Your call forward on ring timeout has successfully been deactivated.
vsc_cfna_on	93 (Call Forward on Not Available)	Your call forward while not reachable has successfully been activated.
vsc_cfna_off	93 (Call Forward on Not Available)	Your call forward while not reachable has successfully been deactivated.
vsc_speeddial	50 (Speed Dial Slot)	Your speed dial slot has successfully been stored.
vsc_reminder_on	55 (One-Shot Reminder Call)	Your reminder has successfully been activated.
vsc_reminder_off	55 (One-Shot Reminder Call)	Your reminder has successfully been deactivated.
vsc_blockinclir_on	32 (Block Incoming Anonymous Calls)	Your rejection of anonymous calls has successfully been activated.
vsc_blockinclir_off	32 (Block Incoming Anonymous Calls)	Your rejection of anonymous calls has successfully been deactivated.

6.20. Handling WebRTC Clients

WebRTC is an open project providing browsers and mobile applications with Real-Time Communications (RTC) capabilities. Configuring your platform to offer WebRTC is quite easy and straightforward. This allows you to have a SIP-WebRTC bridge in place and make audio/video call towards normal SIP users from WebRTC clients and vice versa. Sip Provider listens, by default, on the following WebSockets and WebSocket Secure: ws://your-ip:5060/ws, wss://your-ip:5061/ws and wss://your-ip:1443/wss/sip/.

The WebRTC subscriber is just a normal subscriber which has just a different configuration in his Preferences. You need to change the following preferences under Subscribers→Details→Preferences→NAT and Media Flow Control:

use_rtpproxy: Always with rtpproxy as additional ICE candidate
transport_protocol: RTP/SAVPF (encrypted SRTP with RTCP feedback)

The transport_protocol setting may change, depending on your WebRTC client/browser configuration. Supported protocols are the following:

Transparent (Pass through using the client’s transport protocol)
RTP/AVP (Plain RTP)
RTP/SAVP (encrypted SRTP)
RTP/AVPF (RTP with RTCP feedback)
RTP/SAVPF (encrypted SRTP with RTCP feedback)
UDP/TLS/RTP/SAVP (Encrypted SRTP using DTLS)
UDP/TLS/RTP/SAVPF (Encrypted SRTP using DTLS with RTCP feedback)

warning
warning	The below configuration is enough to handle a WebRTC client/browser. As mentioned, you may need to tune a little bit your `transport_protocol` configuration, depending on your client/browser settings.

In order to have a bridge between normal SIP clients (using plain RTP for example) and WebRTC client, the normal SIP clients' preferences have to have the following configuration:

transport_protocol: RTP/AVP (Plain RTP)

This will teach Sip Provider to translate between Plain RTP and RTP/SAVPF when you have calls between normal SIP clients and WebRTC clients.

6.21. XMPP and Instant Messaging

Instant Messaging (IM) based on XMPP comes with sip:provider CE out of the box. sip:provider CE uses prosody as internal XMPP server. Each subscriber created on the platform have assigned a XMPP user, reachable already - out of the box - by using the same SIP credentials. You can easily open an XMPP client (e.g. Pidgin) and login with your SIP username@domain and your SIP password. Then, using the XMPP client options, you can create your buddy list by adding your buddies in the format user@domain.

6.22. Call Recording

6.22.1. Introduction to Call Recording Function

Sipwise NGCP provides an opportunity to record call media content and store that in files. This function is available since mr5.3.1 version of the sip:provider CE.

Some characteristics of the Call Recording:

Call Recording function can store both unidirectional (originating either from caller, or from callee) or bidirectional (combined) streams from calls, resulting in 1, 2 or 3 physical files as output
The location and format of the files is configurable.
File storage is planned to occur on an NFS shared folder.
Activation of call recording may happen generally for a Domain / Peer / Subscriber through the NGCP admin web interface.
important
NGCP’s Call Recording function is not meant for individual call interception purpose! Sipwise provides its Lawful Interception solution for that use case.
Querying or deletion of existing recordings may happen through the REST API.
Listing recordings of a subscriber is possible on NGCP’s admin web interface.

The Call Recording function is implemented using NGCP’s rtpengine module.

info
info	There are 2 rtpengine daemons employed when call recording is enabled and active. The main rtpengine takes care of forwarding media packets between caller and callee, as usual, while the secondary rtpengine (recording) daemon is responsible for storing call data streams in the file system.

Call Recording is disabled by default. Enabling and configuration of Call Recording takes place in 2 steps:

Enabling the feature on the NGCP by setting configuration parameters in the main config.yml configuration file.
Activating the feature for a Domain / Peer / Subscriber.

6.22.2. Information on Files and Directories

NGCP’s Call Recording function uses an NFS shared folder to save recorded streams.

important
important	Since call data amount may be huge (depending, of course, on the number and duration of calls), it is strongly not recommended to store recorded streams on NGCP’s local disks. However if you have to store recorded streams as files in the local filesystem, please contact Sipwise Support team in order to get the proper configuration of Call Recording function.

The NFS share gets mounted during startup of the recording daemon. If the NFS share cannot be mounted for some reason, the recording daemon will not start.

Filenames have the format: <call_ID>-<random>-<SSRC>.<extension>, where:

call_ID: SIP Call-ID of the call being recorded
random: is a string of random characters, unique for each recorded call. It’s purpose is to avoid possible filename collisions if a Call-ID ever gets reused.
SSRC: is the RTP SSRC for unidirectional recordings, or “mix” for the bidirectional (combined) audio.
extension: is either “mp3” or “wav”, depending on the configuration (rtpproxy.recording.output_format)

There might be 1, 2 or 3 files produced as recorded streams. The number of files depends on the configuration:

rtpproxy.recording.output_mixed = ‘yes’ (combined stream required)
rtpproxy.recording.output_single = ‘no’ (unidirectional streams not required)
rtpproxy.recording.output_mixed = ‘no’ (combined stream not required)
rtpproxy.recording.output_single = ‘yes’ (unidirectional streams required)
rtpproxy.recording.output_mixed = ‘yes’ (combined stream required)
rtpproxy.recording.output_single = ‘yes’ (unidirectional streams required)

6.22.3. Configuration

The Call Recording function can be enabled and configured on the NGCP by changing the following configuration parameters in config.yml file:

rtpproxy:
  ...
  recording:
    enabled: no
    mp3_bitrate: '48000'
    nfs_host: 192.168.1.1
    nfs_remote_path: /var/recordings
    output_dir: /var/lib/rtpengine-recording
    output_format: wav
    output_mixed: yes
    output_single: yes
    resample: no
    resample_to: '16000'
    spool_dir: /var/spool/rtpengine

6.22.3.1. Enabling Call Recording

Enabling the function requires changing the value of rtpproxy.recording.enabled parameter to “yes”. In order to make the new configuration active, it’s necessary to do:

ngcpcfg apply ‘Activated call recording’

Description of configuration parameters:

enabled: when set to “yes” Call Recording function is enabled; default: “no”
mp3_bitrate: the bitrate used when recording happens in MP3 format; default: "48000"
nfs_host: IP address of the NFS host that provides storage space for recorded streams; default: "192.168.1.1"
nfs_remote_path: the remote path (folder) where files of recorded streams are stored on the NFS share; default: "/var/recordings"
output_dir: is the local mount point for the NFS share, and thus where the final audio files will be written; default: "/var/lib/rtpengine-recording"
caution
Normally you don’t need to change the default setting. If you do change the value, please be aware that recorded files will be written by root user in that directory.
output_format: possible values are “wav” (Wave) or “mp3” (MP3); default: “wav”
output_mixed: “yes” means that there is a file that contains a mixed stream of caller and callee voice data; default: "yes"
output_single: “yes” means that there is a separate file for each stream direction, i.e. for the streams originating from caller and callee; default: "yes"
resample: when set to “yes” the call data stream will be resampled before storing it in the file; default: “no”
resample_to: the sample rate used for resampling output; default: "16000"
spool_dir: is the place for temporary metadata files that are used by the recording daemon and the main rtpengine daemon for their communication; default: "/var/spool/rtpengine"
caution
You should not change the default setting unless you have a good reason to do so! Sipwise has thoroughly tested the Call Recording function with the default setting.

If Call Recording is enabled you can see 2 rtpengine processes running when checking the NGCP system state with monit tool:

root@sp1:/etc/ngcp-config# monit summary
...
Process 'lb'                        Running
Process 'rtpengine'                 Running
Process 'rtpengine-recording'       Running
Process 'voisniff-ng'               Running
...

6.22.3.2. Activating Call Recording

Activating Call Recording for e.g. a Subscriber: please use NGCP’s admin web interface for this purpose. On the web interface one has to navigate as follows: Settings → Subscribers → select subscriber Details → Preferences → NAT and Media Flow Control. Afterwards the record_call option has to be enabled by pressing the Edit button and ticking the checkbox.

Figure 48. Activating Call Recording

info

The call recording function may be activated for a single Subscriber, a Domain and a Peer server in the same way: Preferences → NAT and Media Flow Control → record_call. When activating call recording for a Domain or Peer this effectively activates the function for all subscribers that belong to the selected domain, and for all calls with a local endpoint going through the selected peer server, respectively.

It is possible to list existing call recordings of a Subscriber through the admin web interface of NGCP. In order to do so, please navigate to: Settings → Subscribers → select subscriber Details → Call Recordings

Figure 49. Listing Call Recordings

If you select an item in the list, besides the main properties such as the time of call and the SIP Call-ID, you can retrieve the details of the related call (press the Call Details button), get the list of recorded files (press the Recorded Files button) or Delete the recorded call.

When selecting Call Details you will see the most important accounting data of the call. Furthermore you can see the SIP Call Flow or the complete Call Details if you press the respective buttons.

Figure 50. Listing Call Details for a Recording

When navigating to Recorded Files of a call you will be presented with a list of files. For each file item:

type of stream is shown, that can be either "mixed" (combined voice data), or "single" (voice data of caller or callee)
file format is shown, that can be either "wav", or "mp3"
you can download the file by pressing the Play button

Figure 51. Listing Files for a Recording

6.22.4. REST API

The NGCP REST API provides methods for querying and deletion of existing recording data. The full documentation of the available API methods is available on the admin web interface of the NGCP, as usual.

The following API methods are provided for managing Call Recordings:

CallRecordings:
- Provides information about the calls recorded in the system; can also be used to delete a recording entry
- accessible by the path: /api/callrecordings (collection) or /api/callrecordings/id (single item)
- Supported HTTP methods: OPTIONS, GET, DELETE
CallRecordingStreams:
- Provides information about recorded streams, such as start time, end time, format, mixed/single type, etc.; can also be used to delete a recorded stream
- accessible by the path: /api/callrecordingstreams (collection) or /api/callrecordingstreams/id (single item)
- Supported HTTP methods: OPTIONS, GET, DELETE
CallRecordingFiles:
- Provides information about recorded streams, such as start time, end time, format, mixed/single type, etc.; additionally returns the file content too
- accessible by the path: /api/callrecordingfiles (collection) or /api/callrecordingfiles/id (single item)
- Supported HTTP methods: OPTIONS, GET

6.23. SMS (Short Message Service) on Sipwise NGCP

Starting with its mr5.0.1 release, Sipwise NGCP offers short messaging service to its local subscribers. The implementation is based on a widely used software module: Kannel, and it needs to interact with a mobile operator’s SMSC in order to send and receive SMs for the local subscribers. The data exchange with SMSC uses SMPP (Short Message Peer-to-Peer) protocol.

SMS directions:

incoming / received: the destination of the SM is a local subscriber on the NGCP
outgoing / sent: the SM is submitted by a local subscriber

info
info	The Sipwise NGCP behaves as a short message client towards the SMSC of a mobile operator. This means every outgoing SM will be forwarded to the SMSC, and every incoming SM will reach the NGCP through an SMSC.

The architecture of the SMS components of NGCP and their interactions to other elements is depicted below, on a sip:carrier system:

Figure 52. SMS Interactions on NGCP

info
info	For the sip:provider CE and PRO NGCP installations: the Kannel components and the ngcp-panel all run on the same single node. The description of SMS module will continue referring to a sip:carrier installation in the handbook.

There are 2 components of the SMS module:

SMS Box: this component takes care of handling the messages locally, that means:
- delivering them to subscribers (writing into database for later retrieval)
- picking up the submitted SMs from the database and forwarding them to the Bearer Box component
Bearer Box: this component manages the transmission of SMs between Sipwise NGCP and the mobile operator’s SMSC

6.23.1. Configuration

6.23.1.1. Main Parameters

The SMS function of NGCP is disabled by default. In order to enable SMS you have to change the value of configuration parameter sms.enable to yes in the main configuration file (/etc/ngcp-config/config.yml).

The second step of configuration is related to the SMSC where NGCP will connect to. You have to set the following parameters:

sms.smsc.host: IP address of the SMSC
sms.smsc.port: Port number of the SMSC
sms.smsc.username: Username for authentication on the SMSC
sms.smsc.password: Password for authentication on the SMSC

Other parameters of the SMSC connection may also need to be changed from the default values, but this is specific to each deployment.

Then, as usual, you have to make the new configuration active:

$ ngcpcfg apply 'Enabled SMS'

6.23.1.2. Configuration Files of Kannel

There are a few configuration files for the Kannel module, namely:

/etc/default/ngcp-kannel: determines which components of Kannel will be started. This is auto-generated from /etc/ngcp-config/templates/etc/default/ngcp-kannel.tt2 file when SMS is enabled.
/etc/kannel/kannel.conf: contains detailed configuration of Kannel components. This is auto-generated from /etc/ngcp-config/templates/etc/kannel/kannel.conf.tt2 file when SMS is enabled.
/etc/logrotate.d/ngcp-kannel.conf: configuration of logrotate for Kannel log files. This is auto-generated from /etc/ngcp-config/templates/etc/logrotate.d/ngcp-kannel.conf.tt2 file when SMS is enabled.

caution
caution	Please do not change settings in the above mentioned template files, unless you have to tailor Kannel settings to your specific needs!

Finally: see the description of each configuration parameter in the appendix Section 1.31, “sms”.

6.23.1.3. Call Forwarding for SMS (CFS)

Any subscriber registered on NGCP can apply a call forwarding setting for short messages, referred to as "CFS" (Call Forward - SMS). If the CFS feature is enabled, he can receive the SMs on his mobile phone, for example, instead of retrieving the SMs through the REST API. This is much more convenient for users if they do not have an application on their smartphone or computer that could manage the SMs through the REST API.

In order to enable CFS you have to set the forwarding as usual on the admin web interface, or through the REST API. Navigate to Subscribers → select one → Details → Preferences → Call Forwards and press the Edit button.

Figure 53. Call Forward for SMS

6.23.2. Monitoring, troubleshooting

6.23.2.1. Bearer Box (LB node of NGCP)

On the LB node you can see a process named "bearerbox". This process has 2 listening ports assigned to it:

13000: this is the generic Kannel administration port, that belongs to the "core" component of Kannel.
13001: this is the communication port towards the SMS Box component running on PRX nodes of NGCP.

The monit tool also shows the bearerbox process in its status information:

$ monit summary
...
Process 'kannel-bearerbox'          Running
...

The following log files can provide information about the operation of Bearer Box:

status messages and high level, short entries about sent and received messages: /var/log/ngcp/kannel/kannel.log

...
2017-09-26 08:57:32 [15922] [10] DEBUG: boxc_receiver: heartbeat with load value 0 received
...
2017-09-26 11:12:06 [15922] [10] DEBUG: boxc_receiver: sms received
2017-09-26 11:12:06 [15922] [10] DEBUG: send_msg: sending msg to box: <192.168.1.4>
2017-09-26 11:12:06 [15922] [11] DEBUG: send_msg: sending msg to box: <192.168.1.4>
2017-09-26 11:12:06 [15922] [11] DEBUG: boxc_sender: sent message to <192.168.1.4>
2017-09-26 11:12:06 [15922] [10] DEBUG: boxc_receiver: got ack
...

detailed information and message content of sent and received messages, link enquiries: /var/log/kannel/smsc.log

info
info	Sent and received message examples shown here do not contain the full phone number and content for confidentiality reason.

Example received message:

...
2017-09-26 12:09:36 [15922] [6] DEBUG: SMPP[default_smsc]: Got PDU:
2017-09-26 12:09:36 [15922] [6] DEBUG: SMPP PDU 0x7f2274025070 dump:
2017-09-26 12:09:36 [15922] [6] DEBUG:   type_name: deliver_sm
2017-09-26 12:09:36 [15922] [6] DEBUG:   command_id: 5 = 0x00000005
2017-09-26 12:09:36 [15922] [6] DEBUG:   command_status: 0 = 0x00000000
2017-09-26 12:09:36 [15922] [6] DEBUG:   sequence_number: 11867393 = 0x00b51501
2017-09-26 12:09:36 [15922] [6] DEBUG:   service_type: NULL
2017-09-26 12:09:36 [15922] [6] DEBUG:   source_addr_ton: 2 = 0x00000002
2017-09-26 12:09:36 [15922] [6] DEBUG:   source_addr_npi: 1 = 0x00000001
2017-09-26 12:09:36 [15922] [6] DEBUG:   source_addr: "0660......."
2017-09-26 12:09:36 [15922] [6] DEBUG:   dest_addr_ton: 1 = 0x00000001
2017-09-26 12:09:36 [15922] [6] DEBUG:   dest_addr_npi: 1 = 0x00000001
2017-09-26 12:09:36 [15922] [6] DEBUG:   destination_addr: "43668......."
2017-09-26 12:09:36 [15922] [6] DEBUG:   esm_class: 0 = 0x00000000
2017-09-26 12:09:36 [15922] [6] DEBUG:   protocol_id: 0 = 0x00000000
2017-09-26 12:09:36 [15922] [6] DEBUG:   priority_flag: 0 = 0x00000000
2017-09-26 12:09:36 [15922] [6] DEBUG:   schedule_delivery_time: NULL
2017-09-26 12:09:36 [15922] [6] DEBUG:   validity_period: NULL
2017-09-26 12:09:36 [15922] [6] DEBUG:   registered_delivery: 0 = 0x00000000
2017-09-26 12:09:36 [15922] [6] DEBUG:   replace_if_present_flag: 0 = 0x00000000
2017-09-26 12:09:36 [15922] [6] DEBUG:   data_coding: 3 = 0x00000003
2017-09-26 12:09:36 [15922] [6] DEBUG:   sm_default_msg_id: 0 = 0x00000000
2017-09-26 12:09:36 [15922] [6] DEBUG:   sm_length: 158 = 0x0000009e
2017-09-26 12:09:36 [15922] [6] DEBUG:   short_message:
2017-09-26 12:09:36 [15922] [6] DEBUG:    Octet string at 0x7f2274000f80:
2017-09-26 12:09:36 [15922] [6] DEBUG:      len:  158
2017-09-26 12:09:36 [15922] [6] DEBUG:      size: 159
2017-09-26 12:09:36 [15922] [6] DEBUG:      immutable: 0
2017-09-26 12:09:36 [15922] [6] DEBUG:      data: 5a <14 bytes> 46
2017-09-26 12:09:36 [15922] [6] DEBUG:      data: 72 <14 bytes> 68
2017-09-26 12:09:36 [15922] [6] DEBUG:      data: 61 <14 bytes> 67
2017-09-26 12:09:36 [15922] [6] DEBUG:      data: 20 <14 bytes> 57
2017-09-26 12:09:36 [15922] [6] DEBUG:      data: 65 <14 bytes> 63
2017-09-26 12:09:36 [15922] [6] DEBUG:      data: 68 <14 bytes> 73
2017-09-26 12:09:36 [15922] [6] DEBUG:      data: 2e <14 bytes> 61
2017-09-26 12:09:36 [15922] [6] DEBUG:      data: 6c <14 bytes> 73
2017-09-26 12:09:36 [15922] [6] DEBUG:      data: 3a <14 bytes> 73
2017-09-26 12:09:36 [15922] [6] DEBUG:      data: 4d <14 bytes> 6e
2017-09-26 12:09:36 [15922] [6] DEBUG:    Octet string dump ends.
2017-09-26 12:09:36 [15922] [6] DEBUG: SMPP PDU dump ends.
2017-09-26 12:09:36 [15922] [6] DEBUG: SMPP[default_smsc]: Sending PDU:
2017-09-26 12:09:36 [15922] [6] DEBUG: SMPP PDU 0x7f2274020790 dump:
2017-09-26 12:09:36 [15922] [6] DEBUG:   type_name: deliver_sm_resp
2017-09-26 12:09:36 [15922] [6] DEBUG:   command_id: 2147483653 = 0x80000005
2017-09-26 12:09:36 [15922] [6] DEBUG:   command_status: 0 = 0x00000000
2017-09-26 12:09:36 [15922] [6] DEBUG:   sequence_number: 11867393 = 0x00b51501
2017-09-26 12:09:36 [15922] [6] DEBUG:   message_id: NULL
2017-09-26 12:09:36 [15922] [6] DEBUG: SMPP PDU dump ends.
2017-09-26 12:09:36 [15922] [6] DEBUG: SMPP[default_smsc]: throughput (0.00,5.00)
...

Example sent message:

...
2017-09-26 12:04:08 [15922] [6] DEBUG: SMPP[default_smsc]: throughput (0.00,5.00)
2017-09-26 12:04:08 [15922] [6] DEBUG: SMPP[default_smsc]: Manually forced source addr ton = 1, source add npi = 1
2017-09-26 12:04:08 [15922] [6] DEBUG: SMPP[default_smsc]: Manually forced dest addr ton = 1, dest add npi = 1
2017-09-26 12:04:08 [15922] [6] DEBUG: SMPP[default_smsc]: Sending PDU:
2017-09-26 12:04:08 [15922] [6] DEBUG: SMPP PDU 0x7f2274025070 dump:
2017-09-26 12:04:08 [15922] [6] DEBUG:   type_name: submit_sm
2017-09-26 12:04:08 [15922] [6] DEBUG:   command_id: 4 = 0x00000004
2017-09-26 12:04:08 [15922] [6] DEBUG:   command_status: 0 = 0x00000000
2017-09-26 12:04:08 [15922] [6] DEBUG:   sequence_number: 98163 = 0x00017f73
2017-09-26 12:04:08 [15922] [6] DEBUG:   service_type: NULL
2017-09-26 12:04:08 [15922] [6] DEBUG:   source_addr_ton: 5 = 0x00000005
2017-09-26 12:04:08 [15922] [6] DEBUG:   source_addr_npi: 0 = 0x00000000
2017-09-26 12:04:08 [15922] [6] DEBUG:   source_addr: "any"
2017-09-26 12:04:08 [15922] [6] DEBUG:   dest_addr_ton: 1 = 0x00000001
2017-09-26 12:04:08 [15922] [6] DEBUG:   dest_addr_npi: 1 = 0x00000001
2017-09-26 12:04:08 [15922] [6] DEBUG:   destination_addr: "43676......."
2017-09-26 12:04:08 [15922] [6] DEBUG:   esm_class: 3 = 0x00000003
2017-09-26 12:04:08 [15922] [6] DEBUG:   protocol_id: 0 = 0x00000000
2017-09-26 12:04:08 [15922] [6] DEBUG:   priority_flag: 0 = 0x00000000
2017-09-26 12:04:08 [15922] [6] DEBUG:   schedule_delivery_time: NULL
2017-09-26 12:04:08 [15922] [6] DEBUG:   validity_period: NULL
2017-09-26 12:04:08 [15922] [6] DEBUG:   registered_delivery: 0 = 0x00000000
2017-09-26 12:04:08 [15922] [6] DEBUG:   replace_if_present_flag: 0 = 0x00000000
2017-09-26 12:04:08 [15922] [6] DEBUG:   data_coding: 0 = 0x00000000
2017-09-26 12:04:08 [15922] [6] DEBUG:   sm_default_msg_id: 0 = 0x00000000
2017-09-26 12:04:08 [15922] [6] DEBUG:   sm_length: 23 = 0x00000017
2017-09-26 12:04:08 [15922] [6] DEBUG:   short_message:
2017-09-26 12:04:08 [15922] [6] DEBUG:    Octet string at 0x7f227400c460:
2017-09-26 12:04:08 [15922] [6] DEBUG:      len:  23
2017-09-26 12:04:08 [15922] [6] DEBUG:      size: 24
2017-09-26 12:04:08 [15922] [6] DEBUG:      immutable: 0
2017-09-26 12:04:08 [15922] [6] DEBUG:      data: 44 <14 bytes> 73
2017-09-26 12:04:08 [15922] [6] DEBUG:      data: 74 <5 bytes> 39
2017-09-26 12:04:08 [15922] [6] DEBUG:    Octet string dump ends.
2017-09-26 12:04:08 [15922] [6] DEBUG: SMPP PDU dump ends.
2017-09-26 12:04:08 [15922] [6] DEBUG: SMPP[default_smsc]: throughput (1.00,5.00)
...

Example link enquiry:

...
2017-09-26 12:13:38 [15922] [6] DEBUG: SMPP[default_smsc]: throughput (0.00,5.00)
2017-09-26 12:13:38 [15922] [6] DEBUG: SMPP[default_smsc]: Got PDU:
2017-09-26 12:13:38 [15922] [6] DEBUG: SMPP PDU 0x7f2274020790 dump:
2017-09-26 12:13:38 [15922] [6] DEBUG:   type_name: enquire_link
2017-09-26 12:13:38 [15922] [6] DEBUG:   command_id: 21 = 0x00000015
2017-09-26 12:13:38 [15922] [6] DEBUG:   command_status: 0 = 0x00000000
2017-09-26 12:13:38 [15922] [6] DEBUG:   sequence_number: 90764 = 0x0001628c
2017-09-26 12:13:38 [15922] [6] DEBUG: SMPP PDU dump ends.
2017-09-26 12:13:38 [15922] [6] DEBUG: SMPP[default_smsc]: Sending PDU:
2017-09-26 12:13:38 [15922] [6] DEBUG: SMPP PDU 0x7f2274025070 dump:
2017-09-26 12:13:38 [15922] [6] DEBUG:   type_name: enquire_link_resp
2017-09-26 12:13:38 [15922] [6] DEBUG:   command_id: 2147483669 = 0x80000015
2017-09-26 12:13:38 [15922] [6] DEBUG:   command_status: 0 = 0x00000000
2017-09-26 12:13:38 [15922] [6] DEBUG:   sequence_number: 90764 = 0x0001628c
2017-09-26 12:13:38 [15922] [6] DEBUG: SMPP PDU dump ends.
2017-09-26 12:13:38 [15922] [6] DEBUG: SMPP[default_smsc]: throughput (0.00,5.00)
...

6.23.2.2. SMS Box (PRX node of NGCP)

On the PRX node you can see a process named "smsbox". This process has a listening port assigned to it: 13002, that is the communication port towards the Bearer Box component running on LB nodes.

The monit tool also shows the smsbox process in its status information:

$ monit summary
...
Process 'kannel-smsbox'             Running
...

The following log files can provide information about the operation of SMS Box:

sent and received messages using the API of WEB node: /var/log/kannel/smsbox.log

info
info	Sent and received message examples shown here do not contain the full phone number and content for confidentiality reason.

Example sent message:

...
2017-09-26 12:16:42 [22763] [2] DEBUG: HTTP: Creating HTTPClient for `192.168.1.2'.
2017-09-26 12:16:42 [22763] [2] DEBUG: HTTP: Created HTTPClient area 0x7f5dcc000ad0.
2017-09-26 12:16:42 [22763] [3] INFO: smsbox: Got HTTP request </cgi-bin/sendsms> from <192.168.1.3>
2017-09-26 12:16:42 [22763] [3] INFO: sendsms used by <sipwise>
2017-09-26 12:16:42 [22763] [3] INFO: sendsms sender:<sipwise:43668.......> (192.168.1.3) to:<43676.......> msg:<...>
2017-09-26 12:16:42 [22763] [3] DEBUG: Stored UUID ab95eb45-1ec0-4932-9863-1a95609a025f
2017-09-26 12:16:42 [22763] [3] DEBUG: message length 52, sending 1 messages
2017-09-26 12:16:42 [22763] [3] DEBUG: Status: 202 Answer: <Sent.>
2017-09-26 12:16:42 [22763] [3] DEBUG: Delayed reply - wait for bearerbox
2017-09-26 12:16:42 [22763] [0] DEBUG: Got ACK (0) of ab95eb45-1ec0-4932-9863-1a95609a025f
2017-09-26 12:16:42 [22763] [0] DEBUG: HTTP: Destroying HTTPClient area 0x7f5dcc000ad0.
2017-09-26 12:16:42 [22763] [0] DEBUG: HTTP: Destroying HTTPClient for `192.168.1.3'.
...

Example received message:

...
2017-09-26 11:59:45 [22763] [5] INFO: Starting to service <...message content...> from <+43676-------> to <+43668------->
2017-09-26 11:59:45 [22763] [10] DEBUG: Queue contains 0 pending requests.
2017-09-26 11:59:45 [22763] [10] DEBUG: HTTPS URL; Using SSL for the connection
2017-09-26 11:59:45 [22763] [10] DEBUG: Parsing URL `https://192.168.1.2:1443/internalsms/receive?auth_token=fNLosMgwdNUrKvEfFMm9
&timestamp=2017-09-26+09:59:45&from=%2B43676-------&to=%2B43668-------&charset=UTF-8&coding=0&text=...':
2017-09-26 11:59:45 [22763] [10] DEBUG:   Scheme: https://
2017-09-26 11:59:45 [22763] [10] DEBUG:   Host: 192.168.1.2
2017-09-26 11:59:45 [22763] [10] DEBUG:   Port: 1443
2017-09-26 11:59:45 [22763] [10] DEBUG:   Username: (null)
2017-09-26 11:59:45 [22763] [10] DEBUG:   Password: (null)
2017-09-26 11:59:45 [22763] [10] DEBUG:   Path: /internalsms/receive
2017-09-26 11:59:45 [22763] [10] DEBUG:   Query: auth_token=fNLosMgwdNUrKvEfFMm9&timestamp=2017-09-26+09:59:45&from=%2B43676-------
&to=%2B43668-------&charset=UTF-8&coding=0&text=...
2017-09-26 11:59:45 [22763] [10] DEBUG:   Fragment: (null)
2017-09-26 11:59:45 [22763] [10] DEBUG: Connecting nonblocking to <192.168.1.2>
2017-09-26 11:59:45 [22763] [10] DEBUG: HTTP: Opening connection to `192.168.1.2:1443' (fd=31).
2017-09-26 11:59:45 [22763] [10] DEBUG: Socket connecting
2017-09-26 11:59:45 [22763] [9] DEBUG: Get info about connecting socket
2017-09-26 11:59:45 [22763] [9] DEBUG: HTTP: Sending request:
2017-09-26 11:59:45 [22763] [9] DEBUG: Octet string at 0x7f5dbc00f470:
2017-09-26 11:59:45 [22763] [9] DEBUG:   len:  382
2017-09-26 11:59:45 [22763] [9] DEBUG:   size: 1024
2017-09-26 11:59:45 [22763] [9] DEBUG:   immutable: 0
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 47 45 54 20 2f 69 6e 74 65 72 6e 61 6c 73 6d 73   GET /internalsms
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 2f 72 65 63 65 69 76 65 3f 61 75 74 68 5f 74 6f   /receive?auth_to
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 6b 65 6e 3d ...                                   ken=
                                                          ... 20 48 54 54 50 2f 31 2e 31 0d 0a         HTTP/1.1..
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 43 6f 6e 6e 65 63 74 69 6f 6e 3a 20 6b 65 65 70   Connection: keep
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 2d 61 6c 69 76 65 0d 0a 55 73 65 72 2d 41 67 65   -alive..User-Age
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 6e 74 3a 20 4b 61 6e 6e 65 6c 2f 31 2e 34 2e 34   nt: Kannel/1.4.4
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 0d 0a 48 6f 73 74 3a 20 31 39 32 2e 31 36 38 2e   ..Host: 192.168.
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 31 2e 32 3a 31 34 34 33 0d 0a 0d 0a               1.2:1443....
2017-09-26 11:59:45 [22763] [9] DEBUG: Octet string dump ends.
2017-09-26 11:59:45 [22763] [9] DEBUG: HTTP: Status line: <HTTP/1.1 200 OK>
2017-09-26 11:59:45 [22763] [9] DEBUG: HTTP: Received response:
2017-09-26 11:59:45 [22763] [9] DEBUG: Octet string at 0x7f5dbc006970:
2017-09-26 11:59:45 [22763] [9] DEBUG:   len:  333
2017-09-26 11:59:45 [22763] [9] DEBUG:   size: 1024
2017-09-26 11:59:45 [22763] [9] DEBUG:   immutable: 0
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 53 65 72 76 65 72 3a 20 6e 67 69 6e 78 0d 0a 44   Server: nginx..D
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 61 74 65 3a 20 54 75 65 2c 20 32 36 20 53 65 70   ate: Tue, 26 Sep
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 20 32 30 31 37 20 30 39 3a 35 39 3a 34 35 20 47    2017 09:59:45 G
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 4d 54 0d 0a 43 6f 6e 74 65 6e 74 2d 54 79 70 65   MT..Content-Type
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 3a 20 74 65 78 74 2f 68 74 6d 6c 3b 20 63 68 61   : text/html; cha
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 72 73 65 74 3d 75 74 66 2d 38 0d 0a 43 6f 6e 74   rset=utf-8..Cont
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 65 6e 74 2d 4c 65 6e 67 74 68 3a 20 30 0d 0a 43   ent-Length: 0..C
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 6f 6e 6e 65 63 74 69 6f 6e 3a 20 6b 65 65 70 2d   onnection: keep-
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 61 6c 69 76 65 0d 0a 53 65 74 2d 43 6f 6f 6b 69   alive..Set-Cooki
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 65 3a 20 6e 67 63 70 5f 70 61 6e 65 6c 5f 73 65   e: ngcp_panel_se
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 73 73 69 6f 6e 3d 34 35 30 32 64 64 66 65 31 62   ssion=4502ddfe1b
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 63 31 65 33 39 30 65 30 64 36 66 39 64 34 37 30   c1e390e0d6f9d470
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 35 30 37 62 64 64 33 61 65 32 36 62 64 63 3b 20   507bdd3ae26bdc;
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 70 61 74 68 3d 2f 3b 20 65 78 70 69 72 65 73 3d   path=/; expires=
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 54 75 65 2c 20 32 36 2d 53 65 70 2d 32 30 31 37   Tue, 26-Sep-2017
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 20 31 30 3a 35 39 3a 34 35 20 47 4d 54 3b 20 48    10:59:45 GMT; H
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 74 74 70 4f 6e 6c 79 0d 0a 58 2d 43 61 74 61 6c   ttpOnly..X-Catal
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 79 73 74 3a 20 35 2e 39 30 30 37 35 0d 0a 53 74   yst: 5.90075..St
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 72 69 63 74 2d 54 72 61 6e 73 70 6f 72 74 2d 53   rict-Transport-S
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 65 63 75 72 69 74 79 3a 20 6d 61 78 2d 61 67 65   ecurity: max-age
2017-09-26 11:59:45 [22763] [9] DEBUG:   data: 3d 31 35 37 36 38 30 30 30 0d 0a 0d 0a            =15768000....
2017-09-26 11:59:45 [22763] [9] DEBUG: Octet string dump ends.
2017-09-26 11:59:45 [22763] [6] WARNING: Tried to set Coding field, denied.
2017-09-26 11:59:45 [22763] [6] INFO: No reply sent, denied.
2017-09-26 11:59:55 [22763] [9] DEBUG: HTTP: Server closed connection, destroying it <192.168.1.2:1443:1::><0x7f5db0000b20><fd:31>.
...

short log of sent/received messages: /var/log/kannel/smsbox-access.log

...
2017-09-26 12:39:18 SMS HTTP-request sender:+43680------- request: '' url: 'https://192.168.1.2:1443/internalsms/receive?
auth_token=fNLosMgwdNUrKvEfFMm9&timestamp=2017-09-26+10:39:18&from=%2B43680-------&to=%2B43668-------&charset=UTF-8&coding=0
&text=<...message content...>' reply: 200 '<< successful >>'
...
2017-09-26 12:41:54 send-SMS request added - sender:sipwise:43668------- 192.168.1.3 target:43680-------- request: '<...message content...>'
...

6.23.3. REST API

Handling of short messages from the user perspective happens with the help of NGCP’s REST API. There is a dedicated resource: https://<IP of WEB node>:1443/api/sms that allows you to:

Get a list of sent and received messages. This is achieved by sending a GET request on the /api/sms collection, as in the following example:

curl -i -X GET -H 'Connection: close' --cert NGCP-API-client-certificate.pem --cacert ca-cert.pem \
  'https://example.org:1443/api/sms/?page=1&rows=10'

Retrieve an SM (both sent and received). This is achieved by sending a GET request for a specific /api/sms/id item, as in the following example:
```
curl -i -X GET -H 'Connection: close' --cert NGCP-API-client-certificate.pem --cacert ca-cert.pem 'https://example.org:1443/api/sms/1'
```

Send a new message from a local subscriber. This is achieved by sending a POST request for the /api/sms collection, as in the following example:

curl -i -X POST -H 'Connection: close' -H 'Content-Type: application/json' --cert NGCP-API-client-certificate.pem --cacert ca-cert.pem \
  'https://example.org:1443/api/sms/'  --data-binary '{"callee" : "43555666777", "subscriber_id" : 4, "text" : "test"}'

As always, the full documentation of the REST API resources is available on the admin web interface of NGCP: https://<IP of WEB node>:1443/api/#sms

important
important	NGCP’s Call Recording function is not meant for individual call interception purpose! Sipwise provides its Lawful Interception solution for that use case.

caution
caution	Normally you don’t need to change the default setting. If you do change the value, please be aware that recorded files will be written by root user in that directory.

caution
caution	You should not change the default setting unless you have a good reason to do so! Sipwise has thoroughly tested the Call Recording function with the default setting.