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Connect 3CX

Let the AI answer calls from 3CX (Version 18 and 20) and transfer them back to your team. Connect your phone system with these steps.

First create a trunk on Phone numbers → PBX / SIP and choose 3CX. In the steps below, SIP_SERVER, USERNAME and TRUNK_PASSWORD are the values shown on your trunk page.

#Steps

  1. In the 3CX Admin Console open Voice & Chat → Add Trunk and choose Generic → Generic SIP Trunk.

  2. Registrar/Server/Gateway: the SIP server from your trunk page, port 5060. Leave the outbound proxy empty.

  3. Authentication: Register / Account based. Authentication ID and username: the trunk username. Password: the trunk password.

  4. Main trunk number: your company number. Codecs: G.711 u-law and a-law first.

  5. Add an outbound rule: calls to numbers starting with 7777 use this trunk, stripping 0 digits.

  6. Send callers to the AI: in your inbound rule, office hours, or a ring group's "no answer" destination, choose External Number → 7777.

#Check it works

  1. The trunk page shows Registered (for username and password trunks).
  2. Dial 7777 from an internal extension. The AI should answer.
  3. Ask to be transferred to a person, and check the call reaches the extension you set.

Problems? See Troubleshoot SIP.