In the SIP Private Trunk Scenario
When you use your remote extension to make outgoing calls via the SIP private trunk.
You probably encounter the one-way audion issue.
So please follow the steps below to fix it:
1. Fill in the external IP as usual, but leave the Local Network Identification field blank.
2. Customize the "localnet", add the IP segment of the SIP private trunk as the "localnet".
Follow the customized configuration guide and input the command the in SSH.
Then write the content like the follwoing:
In this example, 192.168.5.0/255.255.255.0 is the local network that MyPBX deploys in.
10.10.0.1/255.255.255.0 is the IP segment of the SIP private trunk.