Have a SIP trunk from any carrier (Twilio, Telnyx, your local provider — anything with SIP login) but no Asterisk of your own? Telephony → SIP Trunks connects your trunk to our phone system and sends its calls to your agent. Nothing to run on your side.

Setup — one form:

1. A name you will recognise, and a short technical name (e.g. my-carrier).
2. The server, port, login, password and protocol (UDP/TCP/TLS) from your carrier.
3. Save. We check the settings, keep a copy of the current configuration, connect the line and confirm it registered. If anything fails, the previous configuration comes back automatically.

Your other lines are not touched. Each trunk is kept separately, so adding or deleting one never changes another.

Next step. Once the trunk is live, add your phone numbers in Telephony → Your numbers so incoming calls reach your account. Not registering? See what to do when a trunk does not register.