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If the call is authenticated the Verstat Parameter would be updated as TN validation passed. If the call is not authenticated, then the terminating service provider would set it TN validation failed. In this case, they can also block the call.I've heard this referred to as CVT or Call Validation Treatment.

The origid , standardized as part of STIR / SHAKEN, represents the originating point of a call in each network and opens up the possibility of streamlining the traceback process. The third is potentially to provide some form of display to the end user that the caller ID has been verified.

Attestation. In a STIR/SHAKEN call, the originating service provider signs (or attests) to their relationship with the caller and their right to use the calling number.

A validated call (TN-Validation-Passed) simply means the call was signed and an attestation provided by the originating service provider, and the authentication header was validated by the terminating service provider.

If the call is authenticated the Verstat Parameter would be updated as TN validation passed. If the call is not authenticated, then the terminating service provider would set it TN validation failed. In this case, they can also block the call.

The STIR system aims to add information to the SIP headers that allow the endpoints along the system to positively identify the origin of the data. This does not directly prevent the ability for a robocaller to spoof a caller ID, but it does allow upstream points to decide whether or not to trust that ID.

The verstatparameter is a tel URI parameter within the P-Asserted-Identity header or the From header. P-Asserted-Identity: tel:+15617500080;verstat=TN-Validation-Passed. There are currently three different options to convey verification results through the verstat parameter: TN-Validation-Passed.