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T1 WIC Card Errors on 1841 Router

If one is getting incrementing CRCs and input errors on Serial0/0/0 and the telco has tested clean to the smart jack onsite and now suspects faulty wiring or WIC card issue. How can I be certain its not a WIC card issue?

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Hall of Fame Super Bronze

Re: T1 WIC Card Errors on 1841 Router

Perform loopback test by following this link:

http://www.cisco.com/warp/public/471/hard_loopback.html

HTH,

__

Edison.

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