Telnyx
Global preset (E.164) for Telnyx SIP Trunking. The username is also added to outbound INVITEs in the X-Telnyx-Username header.
Values are taken one-to-one from the product’s telephony preset (sip_presets.py). Check any field marked Not verified in the docs in your provider’s panel; it stays editable in the console with the same note.
- Provider key
telnyx_sip- Region
- Global (E.164, non-TR numbers allowed)
- Connection test
- SIP OPTIONS (the provider does not accept REGISTER)
- Username
- Username of the FQDN connection
- Caller ID (DID)
- Your Telnyx number, E.164 (e.g. +14155550100)
- Extra header
X-Telnyx-Username
Preset values
These values are pre-filled in the console; you can change every one of them.
| Field | Default | Status |
|---|---|---|
| SIP server | sip.telnyx.com | ✓ Verified |
| Transport | TCP | ✓ Verified |
| Authentication | username / password (Digest) | ✓ Verified |
| Dialled number format | e164 | ✓ Verified |
| Inbound signalling IPs | 192.76.120.10, 64.16.250.10, 185.246.41.140, 185.246.41.141, 103.115.244.145, 103.115.244.146, 192.76.120.31, 64.16.250.13, 185.246.42.128, 185.246.42.129, 103.115.244.158, 103.115.244.159 | ✓ Verified |
| Suggested codecs | PCMU, PCMA, G722 | ✓ Verified |
| SIP REFER (transfer) | unknown — use bridge | ! Not verified in the docs |
Provider notes
Telnyx Portal → SIP Trunking: create an FQDN connection (a credentials connection needs REGISTER for inbound calls; LiveKit doesn't send REGISTER). Outbound credentials: the connection's username/password; the username is also sent in the X-Telnyx-Username header. Assign an Outbound Voice Profile to the connection and choose +E.164 as the ANI/DNIS format. Use the 'bridge' method for transfers to a number (REFER only works on inbound calls).
Sources
- sip.telnyx.com/
- support.telnyx.com/en/articles/4245868-sip-connection-types
- support.telnyx.com/en/articles/1130706-sip-connection-number-formats
- developers.telnyx.com/docs/voice/sip-trunking/features/external-transfers
- docs.livekit.io/telephony/start/providers/telnyx/
Connecting
Section titled “Connecting”- In Settings → Integrations → Phone line, pick Telnyx as the provider. The preset fills in the fields.
- Enter the SIP username, password (write-only) and caller number (DID); change the server, transport or number format if needed.
- Press Test connection. Then map your inbound numbers to an assistant. Number mapping →
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