Telnyx

Telnyx is a modern SIP/CPaaS provider with a clean static-trunk model — Callina supports it natively.

Step 1 — Telnyx side

1. In Telnyx Mission Control → SIP Trunking, create a new SIP Connection (FQDN type).
2. Note the connection's SIP URI (e.g. your-trunk.sip.telnyx.com).
3. Under Authentication & Routing, choose Credentials and create a username + password.
4. Add the Callina source IPs to the IP allowlist (shown in Callina → Settings → SIP → Telnyx).
5. Assign your phone number(s) to this connection.

Step 2 — Callina side

In Callina → Settings → SIP:

1. Provider: Telnyx.
2. Paste SIP URI, username, password.
3. Save. Callina registers within ~10 seconds.

Step 3 — Test

Call your Telnyx number — Anna should answer in under 3 seconds.

Troubleshooting