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New Member

cisco 878 no carrier detect LED


I have 2 878 routers that will be getting connected via a BT ESP8 4 wire circut, but the carrier detect led will not come on, I have checked with BT and they are saying that they can only see the TX of the routers at both sides.

I have had to use a RG11 to BT plug adaptor as the routers only came with the RJ11-RJ11 patch lead, and the LTU needs to have a BT plug.

Does anybody know what the pinouts are from the routers, as I can't get the link to come up and need to rule out the cabling.

Thanks in advance


Hall of Fame Super Gold

Re: cisco 878 no carrier detect LED

Hi, which DSL FW do you have, do "show dsl interface" to know.

The pinout is at:

but it's just the central wires, should not be a problem in that.

New Member

Re: cisco 878 no carrier detect LED

Thanks for the response but I have resolved this and it was a cabling pin out problem, I had to make up my own cables.

If anybody is reading this as they have the same fault drop me a mail and I will send the pin outs to you.


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