I have a situation where two remote calls are bridged and they lose voice (can’t hear each other).
We initiate a manual call out of a SIP trunk, person picks up. We put them on hold, dial a second person on a second line using the same SIP trunk, second person picks up. We transfer line 1 to line 2 (tried on Granstream and Polycom phones) and the two lines are joined in a basic mixing bridge (can see via ARI) but neither one can hear the other.
I’ve tested several settings changes thinking it’s the SIP trunk - but nothing there seems to affect this.