Final answer:
To ensure all edges in an edge group use the same WebRTC phone trunk, configure it in the Session Border Controller (SBC). This helps maintain consistent routing and connectivity.
Step-by-step explanation:
If you want all your edges in an edge group to use the same WebRTC phone trunk, you should configure it in the Session Border Controller (SBC). The SBC is responsible for managing communication between different networks, such as the one used by the WebRTC phone trunk. By configuring the SBC to use the same trunk for all edges in the group, you ensure consistent routing and connectivity.
For example, if you are using a popular open-source SBC like FreeSWITCH, you can modify the configuration file (freeswitch.xml) to specify the WebRTC phone trunk for the edge group. This will ensure that all edges in the group use the same trunk for their WebRTC communication.
Configuring the SBC for a consistent trunk usage is important to maintain a smooth and reliable VoIP (Voice over Internet Protocol) communication experience for all the edges in the group.