I have a few SPA252G that connects via VPN, but everytime they make a call it only last about 4 to 5 minutes sometimes less then it drops, basically the connection is lost and the phones reset, how do I check on the UC560 to see why the connection wi...

I've been trying to set up a site to site VPN using a Cisco Wrvs4400n and a sonicwall Pro 2040 enhanced, both with the latest firmware, the sonicwall shows that the tunnel is up but for some reason the linksys cisco does not want to connect, any know...