Thank you to all who have offered knowledge to this case. We have yet to determine the cause. IWATSU and the phone vendor insist that the issue lies with the network but have thus far failed to pinpoint the exact cause. Myself and other experts indicate that the network has been eliminated base on the 7 layer OSI model and insist that it is the phone system. So, no resolution yet! Thank you. We are going to redesign the IP network this month and see if that puts it in order. Short of that and physically separating the phone and network we have no answers.