Documentation Index
Fetch the complete documentation index at: https://developers.telnyx.com/llms.txt
Use this file to discover all available pages before exploring further.
Attestation levels assigned by Telnyx for outbound calls.
Outbound calls
| Scenario | Attestation |
|---|
| Call from owned phone number | A |
| Call from non-owned or verified number | B |
Certificate selection
| Origin | Destination | Certificate |
|---|
| US number | Any | US |
| Canadian number | Canadian number | Canadian |
| Canadian number | US number | US |
Call forwarding
When call forwarding is enabled on a Telnyx number:
- Original STIR/SHAKEN passport preserved or passed through
- DIV (diversion) passport added for forwarded leg with Attestation A
| Route | Certificate |
|---|
| US → US | US |
| Canada → Canada | Canadian |
| US ↔ Canada (cross-border) | US |
Call transfers
| Method | Origination Number | Attestation | Original Passport |
|---|
| SIP REFER | Original caller | B | Not preserved |
| Call Control API (transfer) | Specified in request | A or B* | Not preserved |
| Call Control API (dial/bridge) | Specified in request | A or B* | Not preserved |
TeXML <Dial> | Specified in request | A or B* | Not preserved |
