I am having interment issues with all of my softphone clients where 3 calls work flawlessly and the forth the incoming call via the PRI rings the softphone but neither have any audio. its not every 4 seems to be no real pattern but seems to happen to all of them. The incoming caller hears the auto attendant so confident the issue is with the softphone setup not the PRI. We only use the Softphones when the office is closed due to snow storms etc. I know the softphone is using UDP and I with so many Nating configs at my support personal home routers, I think TCP would be more reliable as it would hold the connection with tcp keep alives and hold a bi directional channel through the home routers. Anyways I have tried changing to TCP as signal Type under "2.7.1.ITP Information" for a given Softphone extension but then the Softphone client hangs at downloading from MCP and then retries. Anyone successfully switched to TCP versus UDP for there softphone setup?