I have a 1602 router supporting a customer site with a fractional t1 (128K).The LEC has indicated the router is switching back and forth from ESF to AMI framing. There are lots of errors showing up on the interface counters. Everytime I have checke...

I was wondering if there was any advantage to assigning IP addresses to the sub-interfaces? It has always run fine using IP unnumbered but am curious if there could be a performance issue.interface Serial1 no ip address encapsulation frame-relay ser...

I am upgrading my customers frame relay network from 56k to 128k. Obviously, this requires a new WIC to be installed in their Cisco 1602 routers. I purchased and installed a WIC-1DSU-T1 card but when rebooting the router it says the software does n...