The SBC Core supports routing non-INVITE messages, including out-of-dialog messages, in SIP core in addition to INVITE only messages.

Routing non-INVITE out-of-dialog messages is supported for the following types of SIP messages:

  • MESSAGE
  • REFER
  • REGISTER
  • OPTIONS
  • INFO
  • SUBSCRIBE
  • PUBLISH

The basic configuration required to enable routing of non-INVITE messages using SIP In Core is as follows:

  1. Enable signaling flag relayNonInviteRequest on the all the Trunk Groups including the default SIP Trunk Groups.
    Reference: SIP Trunk Group - Signaling - CLI

  2. Enable new flag sipRegRelay on the default Zone
    Reference: Common IP Attributes - SIP - CLI

  3. Set the relayFlags related to the appropriate events needed on the Inter-Gateway Signaling Group or Signaling Gateway Group IPSP used for the inter-SBC leg. This enables SUBSCRIBE messages with specific events to pass through.
    Reference: Common IP Attributes - SIP - CLI

 

The above configurations must be performed in addition to the configuration mentioned in the Configuring SBC to use SIP in the Sonus IP Core section, which details the basic configuration required for SIP In Sonus IP Core.

 

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