I have 3 remote IP phones that have worked fine for 3 months now all of a sudden when they are on a call for between 25 - 40 seconds the called party gets redirected to Voicemail, the IP phone continues to show a connection to the trunk for about 10 seconds and then resets.

I know why the redirect is happening and I'm fine with that however in the past this problem was always due to the "Phone Side" network or Router. I have verified that the network is staying up by doing a constant ping so I'm stumped on this one. Unless someone as a better suggestion I will replace the router on Monday.

Thanks Again