About configuring signaling manipulation for Microsoft Teams

Last Updated : Jan 15, 2021 |
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You must configure Avaya SBC with signaling manipulation (SigMa) rules. SigMa rules are used to modify certain numbering plans and attributes specific to PSTN trunks. Microsoft Teams with Avaya SBC is certified using PSTN trunks. Different PSTN trunks will require specific SigMa rules for those trunks. The SigMa scripts must be attached to the SIP server that corresponds to the PSTN trunks.
The following modifications are controlled using SigMa scripts:
  • Modify the Contact, Record-Route URI host with the Avaya SBC FQDN.
  • Add a prefix if required by the PSTN trunk dialing plan by modifying the From, To, and Request lines.
  • Add the X-MS-SBC header.
  • (Optional) For incoming messages from Microsoft Teams, modify the Request line with the Avaya SBC IP address.
  • (Optional) For incoming messages from Microsoft Teams, modify the Record-Route and Route headers with the Avaya SBC IP address if the Record-Route or Route header contains the Avaya SBC FQDN.
Note:
The last two scripts are marked optional, but you may need to create the scripts depending on your topology. Depending on your Service Providers, you might also need to apply other SigMa rules such as removing History Info and adding number manipulation. For more information, see Administering Avaya Session Border Controller.