SIP trunk status (SPA3)


This probe reports the operational status of a SIP trunk interface.

Release notes

Version 2.0.0 - Early deployment
  • Improvement: Review storing information to support inheritance (M16035)
  • Dependency:
    • SNMP Agent module 3.13.0+ or 4.1.0+
    • Sip Trunk resource 2.3.0+ (or backport 1.55.0+)
    • Monitoring Service v2.1.0+

Version 1.4.0 - Early deployment
  • Feature: Include finished calls passed during the last polling period in computation (M11435)
  • Dependency:
    • SNMP Agent module 3.11.0+ or 4.1.0+
    • Sip Trunk resource 2.3.0+ (or backport 1.55.0+)

Version 1.3.0 - General deployment
  • Improvement: Probe will now not be executed on the server if it is not defined on the SMP (M6425)
  • Dependency:
    • SNMP Agent module v3.3.0 or higher
    • Sip Trunk resource 1.44.0+

Version 1.2.0 - General deployment
  • Feature: report and graph SIP trunk usage (M3413)
  • Dependency:
    • SNMP Agent module v2.12.0+
    • Sip Trunk resource 1.44.0+

Version 1.01 - General deployment
  • Bugfix: probe appears on all sop's in the BMS when sop field is not set to 'all'
  • Limitation: this version does not work for sop set to 'all'. Use version 1.0 instead
  • Dependency:
    • SNMP Agent module v2.4+

Version 1.00 - General deployment
  • Initial version
  • Dependency:
    • SNMP Agent module v2.4+

Resource configuration interface

GUI unavailable.

Resource configuration parameters

  • SIP trunk name: Name of the outgoing SIP trunk to be monitored. For example SOA20001

Configuration example

To monitor all the meshed sip trunk of a cluster, create for each trunk a probe and set the SOP field to "*". In this way if a SOP is not seen by another SOP an alarm will be risen.

When added, this resource requires you to apply changes, followed by a reinstall of the SNMP Agent module on all sops in the cluster.

To effectively use this probe the "Qualify SIP registrations" parameter should be enabled in the interface configuration.

Performance graphs

This probe generates a graph with following performance metrics:

  • Total: the number of channels allowed in the SIP trunk. This is a value set in the SIP trunk resource.
  • Used: the number of channels currently in use.
  • Free: the number of channels currently available.


This probe can report following alarm states:

  • CRITICAL: the SIP trunk is down. More precisely, the asterisk SIPShowPeer command reports a status that is not OK.
  • WARNING: the number of channels used is higher or equal to the number of channels allowed.

Possible causes

  • Issue on the Sip Trunk Provider side

Possible consequences

A SIP trunk that is down has following consequences:

  • No new calls can be set up over the SIP trunk. Ongoing calls routed over the SIP trunk are not interrupted.

Possible actions

  • Contact the SIP Trunk Provider
  • Contact Escaux
  • Reboot the SOP

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