A remote user's connection times out after about 30-90 minutes when coming through a VPN tunnel from a remote site. I have two Cico 515e pixs acting as peers. These are the timeout paramaters:
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
It is my understanding that these do not apply to the VPN tunnel (or do they?) because the firewall will see the remote tunnel as a local connection and treat it like it is on the local LAN.