Twilio

Global preset (E.164) for Twilio Elastic SIP Trunking. All fields are verified in the documentation.

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: twilio_sip
Region: Global (E.164, non-TR numbers allowed)
Connection test: SIP OPTIONS (the provider does not accept REGISTER)
Username: Credential List username
Caller ID (DID): Your Twilio number, E.164 (e.g. +14155550100)

Preset values

These values are pre-filled in the console; you can change every one of them.

Field	Default	Status
SIP server	`enter your own — <your-trunk>.pstn.twilio.com (regional: .pstn.dublin.twilio.com …)`	✓ Verified
Transport	`UDP`	✓ Verified
Authentication	`username / password (Digest)`	✓ Verified
Dialled number format	`e164`	✓ Verified
Inbound signalling IPs	`54.172.60.0/30, 54.244.51.0/30, 54.171.127.192/30, 35.156.191.128/30, 54.65.63.192/30, 54.169.127.128/30, 54.252.254.64/30, 177.71.206.192/30`	✓ Verified
Suggested codecs	`PCMU, PCMA`	✓ Verified
SIP REFER (transfer)	`supported`	✓ Verified

Provider notes

Twilio Console → Elastic SIP Trunking → Trunk: create a Termination URI (<name>.pstn.twilio.com) and a Credential List; the username/password come from that list. Twilio doesn't accept REGISTER (credentials are sent with every INVITE). Enter your LiveKit SIP address as the Origination URI (sip:<livekit-sip>;transport=tcp). For TLS add :5061 to the address. For REFER transfers, enable 'Call Transfers' (and 'PSTN Transfer') on the trunk.

Sources

Connecting

In Settings → Integrations → Phone line, pick Twilio 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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