Adding Stir/Shaken Attestation with Sansay NSS API

Preamble

If you have a requirement to add a Stir/Shaken attestation to calls leaving a FreePBX/PBXact system and you have an account with the Sansay NSS service, you can apply headers by making an API call on each outbound call using the modifications described herein. There are a few third party services that will assist with generating S/S attestations for SIP calls, Sansay NSS does not rely on an SBC or proxy between the PBX and the provider.

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