Did it to me two more times today, once on my call to 801-349-94XX and once on the call to 303-280-33XX. these are outgoing calls that I make, and the symptom is that I cannot hear the called party after 15 minutes of call duration -- they can hear me fine. I've got the VOIPO-provided PAP2 -- and don't have this problem with the other VOIP providers.