Here is my problems (sent a copy to the developer of ACR Phone aswell):

I have a mobile phone with ACR Phone client, and a fixed Cisco 8961
connected to a PBX with DID.

Incoming calls answered in the 8961 – audio works both ways fine

Outgoing calls called from the 8961 – audio works both ways fine

Incoming calls answered in the ACR Phone client – I can only hear the calling person, the calling person cannot hear me.

Outgoing calls called from the ACR Phone client – audio works both ways fine

Im using a VPN tunnel to the PBX server, so there no problems firewall-wise.

The SIP on the phone worked perfectly when I ran Android’s native SIP, but since native SIP support was dropped in android 12, I switched to ACR phone as SIP client, and since then the audio problems on incoming calls started.

Here is a incoming call where audio doesn’t work (calling party doesn’t hear me). Calling party CAN hear the IVR however, so I didn’t include the IVR, but only the parts from when sip09 (ACR phone) rings.

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