*80 Intercom - No Audio from user who dialed

[Stewart1 (Stewart)]

Possibly, this thread:

One way audio between extensions

Running into a weird issue that I haven’t before. Got a box setup on vultur. Phones at an office registering using pjsip to the system via a fqdn and using the responsive firewall. Calls made to the system via an external caller work great. Calls made out from a phone in the office to an external caller work great. Echo tests from extensions to the pbx work great. BUT With a couple of particular extensions, if one extension dials another extension the callee cant hear the caller but the caller…

is relevant to your situation, if the problem occurs only when the called extension has multiple registered devices.