Adding Stir/Shaken attestation using Transnexus ClearIP Service

Preamble

If you have a requirement to add a Stir/Shaken attestation to calls leaving a FreePBX/PBXact system you can do so with a subscription to the ClearIP service provided by Transnexus. There are a few third party services that will assist with generating S/S attestations for SIP calls, ClearIP does this by means of a SIP signaling mechanism that can't easily be consumed directly by FreePBX. It relies on an external SIP proxy to perform the S/S signature.

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