Hi,
I've tested with:
VVX311/VVX411/VVX250
Tested with firmwares: 5.8.3.2414 / 5.9.2.3446 / 5.9.3.2857 / 6.1.0.6189
Attached is a quick picture of a sample packet capture
Only when using opus codec, not when using any other codec, when I place a call on hold, then resume the call, there is one way audio. It appears that the polycom phone is picking up a different RTP version payload type when the call is taken off hold. We can also replicate this issue when pressing the conference button (technically it places the caller on hold) and then cancelling the conference.
This only happens on incoming calls to the polycom phones, and I am unable to replicate this with any other vendor phone, even using the same IP PBX (asterisk 13 pjsip). When we place outbound calls, this issue does not exist.
Aby suggestion on where to go from here?
Not using SRTP (I saw a related post about SRTP issues). Don't know what else to try at this point. I've hit a wall.
Thanks in advance