I have 2 remote sites connecting to a main location. The remotes have 1720s and the main site has 1 1720 with 2 csu cards. The 1 remote site works fine running the app and transferring files. The other site is configured the same yet it can only connect up via terminal services with no problem. If we try to transfer a file of any size it just times out and looks like the connection is dropped. New routers new csu's. T-1 lines has been thoroughly checked and supposedly no problems. Wiring has been checked, tried new switches, new patch cables. At a loss at this time as to why terminal services work but can't transfer files of any size.
I have this problem too.