Creating the Master Bridge
- Navigate to “Bridges” from the 3CX Management Console and click “Add > Master Bridge”.
- Enter a name for the bridge and make note of the virtual extension number, as this will be required when creating the “Slave” bridge connection.
- Specify the “Outbound Rule Prefix” to be used for the “Master” bridge.
- Add the maximum amount of simultaneous calls to be made through this bridge.
- Enter an “Authentication” password that will be used by the Slave bridge to connect.
- To send all SIP and RTP traffic via a single TCP port, select the “Remote PBX uses SBC/ Tunnel Connection” option.
- If enabled, enter the public IP address of the “Slave” 3CX phone system and specify the remote 3CX Tunnel port.
- Click “OK” and the 3CX bridge will be created.
- Navigate to the “Outbound Rules” section and add a new rule, entering a name and the prefix from step 3.
- Select your newly created bridge from the “Route” drop-down and press OK.
Creating the Slave Bridge
- On the “Slave” phone system, select “Bridges” from the 3CX Management Console and click “Add > Slave Bridge”.
- Enter a name for the slave bridge and use the virtual extension number from the “Master” 3CX phone system.
- Specify an “Outbound Rule Prefix”, ensure it is the same as the prefix used for the “Master” bridge.
- Enter the authentication password from the “Master” phone system.
- Enter the Public IP of the “Master” bridge in the remote PBX section, and click OK to create the bridge.
- Add a new rule in the “Outbound Rules” section, entering a name and the same prefix as above.
- Select your bridge from the “Route” drop-down and select OK.
Configure Presence Information across Bridges
- Select “Publish Information” to publish presence information and select “Add” to add which groups on the PBX should be published.
- For users in this 3CX system to see presence of users in other offices, select “Receive Information”.
- Add the Public IP address of the remote phone system and select “Add” to add users or groups.