I have our asa5520 (local network) talking lan2lan VPN to a asa5505 (remote network) for a "remote office". I have a cisco IP phone communicating to the Call Manager over the VPN connection. The problem I have is that the phone will reset and come back or just reset and spin its wheels trying to come back. Checking the syslogs on each ASA device and the Remote device shows a TCP Reset-O, while the local network ASA is showing the TCP Reset-I message. What should I look for to keep the reset from happening and killing my IP phone connection?
I have this problem too.