Issue with HSSI on 3640 and a adtran DSU

briangeorgevinson · ‎02-03-2008

Hello ALL,

I have a Cisco 3640 with a hssi card connected to a adtran T3SU 300. The hssi card is receving lots of input erros and CRC errors. The DSU is receving errors aswell on the local side.

My telco tests clean to a loop i Put infrom of the DSU and behind the DSU. So it seems to be an issue with the DSU talking with the HSSI card. I have found serveral threads on the net about this issue but no resloution. Any thoughts?

jsivulka · ‎02-08-2008

I think you should take care of this problem first before going futher. Here is the link for throubleshooting serial line,

and look for the one that say serial x is up, and line protocol is down;

http://www.cisco.com/univercd/cc/td/doc/cisintwk/itg_v1/tr1915.htm#xtocid1