7613 Router Channlised E1 not coming UP

Unanswered Question
Mar 24th, 2009

Hii Freindz,

I am facing problem with one Channelised E1 connectivity from Cisco 7613 router.

Sonet interface on 7613 router is configured as channelised for 63 E1s. But when we are extending one E1 connectivity toward customer router(on E1 controller card) the same is showing as "Serial Down, Line protocol down" at customer end and at cisco 7613 router "serial is UP, line protocol down" . However we have checked the LOOP from both the routers toward each other. getting the same fine from one end to other .. but still link / serial at customer router is not coming up.

Can anyone suggest... may there is any possibility of problem with configs or its purely a transmission end issue (but please rememeber that loop are fine from 7613 router interface toward customer end interface & vice-versa).


I have this problem too.
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Paolo Bevilacqua Tue, 03/24/2009 - 10:43

Which loops have you tried? Physical with a plug-in or configuration loops ?

What is the remote router? Are you using an E1 converter there ?

sudhir.bhagat Tue, 03/24/2009 - 22:23


Remote router is 2600 series router with E1 Controller ports.

We are testing with loop from routers interface i.e configuration loop.

We are not using E1 converter. Cable from MUX is directly conected to remote router controller interface.


Paolo Bevilacqua Tue, 03/24/2009 - 22:27

For a proper test, make a an RJ45 loop plug and put in E1 termination instead of cable from router. On the other side, interface state must become must be "up, up (looped)".

If it does not do that, it's a circuit problem.


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