In the past month I have had about 20 phones have QOS issues. If I browse to the IP address of the phone I notice a lot of jitter and Recr Discard entries sometimes I can hard reset the phone and the problem clears up, but most of the time I have to setup a new phone and call the old one defective. The MOS score will drop to 2.0-2.5. Could there be something else going on besides a defective phone? Any input would be great.