Keypad
SIP Trunk Management
SIP Trunk Management Guide
Defines the signaling and media channels between the PBX and an external system (NEC SV9100), carrier IP-PBX, or SIP provider trunks.Routes, trunks and the normalization pages can all change a number, and they run one after the other. See the order and which setting to use.
- Transport & Port: UDP 5060 is the default VoIP signaling port.- T.38 UDPTL: fax over IP. Switch it on only when the carrier supports T.38: a carrier that refuses it makes faxes fail.
- Qualify (Heartbeat): Periodically tests the trunk connection status.
Limits to know
- Send as E.164 treats a number that starts with the country code as complete. A national number dialled without its national prefix that happens to start with those digits would be sent wrongly, so try your numbering in Try a number.
- Custom parameters: only option names are checked. Asterisk accepts a wrong value without an error, so test what you changed.
| Trunk | Description | IP & Port | Connection | Status | Actions | |
|---|---|---|---|---|---|---|
| carrier_main | Main carrier (SIP) | sip.carrier-one.example:5060 |
Unknown | |||
| carrier_backup | Backup carrier | 203.0.113.20:5060 |
Unknown | |||
| sbc_tls | SBC over TLS | sbc.carrier-two.example:5061 |
Unknown | |||
| old_pbx | Old PBX (tie line) | 192.0.2.10:5060 |
Unknown |