New SHAKEN/STIR verstat parameters
15, Sep 2021
Today we are releasing two additional values to the verstat parameter to provide customers with more granular information on call attestation and verification results.
Initial SHAKEN/STIR implementation introduced a verification feature, a verstat parameter, that is included in the P-Asserted-Identity SIP header. The verstat parameter includes information about the caller identity validation and attestation level, with possible values of TN-Validation-Passed, TN-Validation-Failed or No-TN-Validation depending on verification results of the PASSPorT and attestation level. This verification is done for inbound calls from the PSTN as well as on-net calls from Telnyx customers to other Telnyx customers.
Following Telnyx efforts to improve the SHAKEN STIR framework, we are introducing additional values to the verstat parameter. These new values will provide Telnyx customers with more granular information regarding originating Caller ID attestation and verification results.
As of today, the possible values are as follows:
|Identity header verification successful and call has an A attestation|
|Identity header verification failed|
|No verification took place because Identity header was not provided|
|NEW||Identity header verification successful and call has a B attestation|
|NEW||Identity header verification successful and call has a C attestation|