Sean brings up a good point to check the maximum clock rate of your module. I've seen more than 1 person try to use the A/S module for 1.544Mbps.... However, the A/S module that he refers to supports a max of 115.2Kbps in async mode and when put into sync mode supports a max of 128Kbps. This module you speak of (NM-4T) should support up to 8Mbps on a single interface or up to 2Mbps on all 4 interfaces at the same time. (just to be sure I checked Cisco's site on that module and here's what I found:
"The 4-port synchronous (sync) serial network module (NM-4T) has four DB-60 ports and provides a data rate of 8 Mbps on port 0, 4 Mbps each on port 0 and port 2, or 2 Mbps on all four ports simultaneously. The NM-4T network module supports only sync mode. " http://www.cisco.com/warp/public/107/hw_4t.html So you clockrate shouldn't be a problem at 64Kbps..... It seems that most of any suggestions I could make have been covered here (framing, frame-relay switching, etc)..... I guess I would just start at layer 1 and work up from there. i.e. make sure all cables, connectors and even serial interfaces on the routers are good, then proceed up to layer 2 with debugs, etc.... HTH, Mike W. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=41368&t=41250 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]

