Since a terminal server uses a serial cable to connect to the router, if that's your only path to the router, you're out of luck using SNMP. Net::Telnet::Cisco is good stuff, but you'll probalby have to overried or modify the the new or login method to work through the terminal server.

If you do find some way to access via the LAN, Cisco has an ftp server with its OIDs in files, I believe. Instructions for getting them are at: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/ent_mib/getmib.htm

--Bob Niederman, http://bob-n.com

All code given here is UNTESTED unless otherwise stated.