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Documentation Index

Fetch the complete documentation index at: https://developers.telnyx.com/llms.txt

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Telnyx provides call attestation information through the verstat parameter in the P-Asserted-Identity SIP header.

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Verstat parameter

P-Asserted-Identity: "John Doe" <sip:+18889809750@sip.telnyx.com;verstat=TN-Validation-Passed>
ValueDescription
TN-Validation-PassedVerification succeeded, A-level attestation
TN-Validation-Passed-BVerification succeeded, B-level attestation
TN-Validation-Passed-CVerification succeeded, C-level attestation
TN-Validation-FailedVerification failed (invalid certificate)
No-TN-ValidationNo Identity header provided

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Call scope

The verstat parameter is included for:
  • Inbound calls from the PSTN
  • On-net calls between Telnyx customers