I have a IP office 8.1 (73) at office A and remote IP phones over VPN's at office B and Office C. I was told to turn off DMP because customer is having problems with incoming and outgoing calls (static, echo, dropped calls, reports of one way audio)phone carrier has replaced equipment and undergone testing and said there are no known issues with their PRI circuit. internal calls seem to work well with every now and then they say there was bad connection possibly due to network traffic. In this scenerio what should i do with DMP?