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ISDN & far end block error

Hello all!

Can you help?

When I 'show controller e1 1/1' I get this error : 'far end block detected error'.

Yet on the controller e1 1/0 there is no such error. Can anyone tell me what this error is trying to tell me. What do I need to do to rectify it? Have I configured something wrong? Does it just 'go away'? Do I need to inform the ISDN provider?

I think the line is working fine, it's this error that troubles me.

Any ideas?

George.

1 REPLY
Bronze

Re: ISDN & far end block error

Far-End Block Error: A signal returned to the transmitting network element indicating that an erred block has been received at the receiving network element.

Two possible causes for this are a faulty cable or the wrong framing set (usually on a point-to-point circuit where the two ends are set differently). Have you confirmed that the circuit is working fine (has any other device been

tested)? To check for any hardware problems on the router side, you could perform a hardware loopback test as shown here:

http://www.cisco.com/warp/public/116/e1_hard_loopback.html

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