We have some intermittent issues with audio going one-way only for a period of around 5 seconds during a call. It doesn’t happen every time and so far I’ve been unable to identify a pattern to which calls will be affected and which won’t, but when it does happen it seems to be a few seconds after the start of the call. So a call will be fine for a few seconds, one-way audio for 5 seconds, then fine for the rest of the call.
I’m at a loss where to start trying to isolate this. It happens on internal calls between extensions on the same system and on external calls going via a SIP trunk or ISDN line. We’ve got recordings of calls via MixMonitor which has all the two-way audio throughout but one or other of the extensions on the call have not been receiving any audio.
Any ideas what I could try next?