Carriers
The carriers and PBXs listed in the SIP trunk picker, what choosing one fills in for you, and what to do when yours is not on the list.
Voice agentsAdd Phone Number, Custom SIP Trunk opens Connect via SIP trunk, a searchable list of 30 carriers, PBXs and contact-centre platforms plus Custom / other. Choosing one pre-fills the trunk’s Nickname with the carrier’s name and labels the trunk with it in the Summary. It fills in nothing else, and every carrier goes through the same form. In the form’s Trunk & gateways step, Detect can identify the server at the host you enter and fill in the first gateway; registration and the SIP options stay for you to enter from the carrier’s own SIP settings. The list is a shortcut, not a different integration: a carrier that is not listed works through Custom / other.
| Carrier | Kind | What the preset fills |
|---|---|---|
| Custom / other | Any SIP endpoint | Nothing; start from scratch |
| Vonage | Carrier | Nickname Vonage |
| Telnyx | Carrier | Nickname Telnyx |
| AudioCodes | Session border controller | Nickname AudioCodes |
| Avaya | PBX | Nickname Avaya |
| Cisco CUCM / CUBE | PBX and border element | Nickname Cisco CUCM / CUBE |
| Genesys | Contact-centre platform | Nickname Genesys |
| Ribbon | Session border controller | Nickname Ribbon |
| 3CX | PBX | Nickname 3CX |
| Maniphone | Carrier | Nickname Maniphone |
| Bandwidth | Carrier | Nickname Bandwidth |
| Plivo | Carrier | Nickname Plivo |
| Sinch | Carrier | Nickname Sinch |
| RingCentral | Cloud PBX | Nickname RingCentral |
| 8x8 | Cloud PBX | Nickname 8x8 |
| Zoom Phone | Cloud PBX | Nickname Zoom Phone |
| Intermedia | Cloud PBX | Nickname Intermedia |
| Nextiva | Cloud PBX | Nickname Nextiva |
| Oracle (Acme Packet) | Session border controller | Nickname Oracle (Acme Packet) |
| Sangoma | PBX and gateways | Nickname Sangoma |
| Patton | Gateways | Nickname Patton |
| Mitel | PBX | Nickname Mitel |
| NEC | PBX | Nickname NEC |
| Asterisk / FreePBX | Open-source PBX | Nickname Asterisk / FreePBX |
| Grandstream | PBX and gateways | Nickname Grandstream |
| Microsoft Teams | Direct Routing | Nickname Microsoft Teams |
| Five9 | Contact-centre platform | Nickname Five9 |
| NICE CXone | Contact-centre platform | Nickname NICE CXone |
| Talkdesk | Contact-centre platform | Nickname Talkdesk |
| Amazon Connect | Contact-centre platform | Nickname Amazon Connect |
| Dialpad | Cloud PBX | Nickname Dialpad |
What to collect from the carrier
Whichever you pick, the form needs the same 3 things from the carrier’s SIP trunk settings:
- Gateway: the signalling host or IP, port and protocol. Some carriers give several; add each as a gateway.
- Authentication: either registration credentials (tick Requires Register) or IP-based authentication, in which case allow Callab AI’s public IP on the carrier side; the form prints it under Register Public IP in Contact.
- Number format: whether the carrier wants the dialled number with or
without the leading
+. That sets Send the leading + to the carrier.
The field-by-field reference is on Connect a SIP trunk.