STIR SHAKEN

Summary of how STIR SHAKEN works

A high-level summary of how STIR/SHAKEN works on an all SIP network, and a description of the STIR/SHAKEN Governance model.

Originating Service Provider (OSP)

Terminating Service Provider (TSP)

Call Attestation Levels

Full Attestation (A)

The service provider (SP) has authenticated the calling party and they are authorized to use the calling number. An example of this case is a subscriber registered with the originating telephone service provider’s soft switch.

Partial Attestation (B)

The service provider has authenticated the call origination but cannot verify the call source is authorized to use the calling number. An example of this use case is a telephone number behind an enterprise PBX.

Gateway Attestation (C)

The service provider has authenticated from where it received the call but cannot authenticate the call source. An example of this case would be a call received from an international gateway.