We are currently running Asterisk v22.214.171.124 on a Linux box. Occasionally, when talking with people outside the network, the incoming voice quality degrades considerably.
The only way to describe it is to say the person on the other end sounds like a Cylon from the old Battlestar Galactica television show. The person on the other end of the line is not aware of any problem. The sound quality is perfectly fine for them.
We’ve discovered that we can “fix” the problem by placing the call on hold and then immediately taking it off hold.
I also found that I could reproduce the problem by dialing an AT&T phone number and proceeding through the menu tree until a certain point, at which time the sound quality goes south.
Any ideas on what this might be?