Pre-requisites:
- 3CX Firewall Test has passed.
- SIP user with password has been created.
- Direct in-dial number (DiD) is bound to the SIP user.
Login to your 3CX Management Console:
• Select SIP Trunks on the sidebar.
• Select Add SIP Trunk > Select Country and Provider as “Generic” > Enter your DiD number in the Main Trunk No field > Click OK.
• General > Enter details as below screenshot
• Options > Enter details as below screenshot
• Inbound Parameters > Enter details as below screenshot
• Outbound Parameters > Enter details as below screenshot