They can hear me, I can't hear them - incoming calls

[butterfly_mtn]

Over the past few weeks it is suddenly hit or miss whether I can hear the caller.  I test the settings afterwards and they are fine. 

Also, my phone is ringing, along with my computer, but not giving me a way to answer on the phone, until it finishes one cycle of trying, and continues to ring longer on a 2nd cycle, then the interface on my phone pops up on my phone to answer. 

Why all the sudden bugs? 

[sparrow]

Lots of questions here. First, you test the settings, how? Are you using your own SBC or using Zoom for PSTN? You mentioned phone, what make and model of phone is it? Is it all phones or a limited set?