How to Install & Setup 3CX SIP Trunking

[su_howto_introduction text=”setting up 3CX SIP Trunking with Circuit ID”] [su_howto_steps]

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Add your 3CX Server(s) to Circuit ID

Follow the How to Add your Server(s) to Circuit ID guide

Purchase Phone Numbers

Follow the How to Purchase Phone Numbers guide to purchase one (1) or more numbers.

Create a 3CX SIP Trunk

Note: Configuring 3CX via the web client and management console differs slightly, but the required information is the same. The below information is based on configuring 3CX via the web client.

Login to your 3CX web client or management console
Next, tick the Admin button (or SIP Trunks if using the management console) , then Voice & chat (skip if using management console)
Click + Add Trunk and enter the following details:
- Country: Generic
- Trunk: Generic SIP Trunk
- Main trunk number: Enter the phone number you purchased in Step 3
- Registrar / Server: g.pstn.circuitid.com
- Authentication ID (SIP User ID): Leave blank
- Authentication password: Leave blank