[c-nsp] Channelized E1

Rodney Dunn rodunn at cisco.com
Fri Oct 8 09:35:53 EDT 2004

You need to be more specific about platform,
PA, etc...

but usually you can't loop further than a T1/E1
level on the router.

ie: for a T3 that can carve to a DS0:

controller T3 3/0/0
 t1 1 channel-group 1 timeslots 1-24
 t1 2 channel-group 1 timeslots 1-24
controller T3 3/0/1
controller T3 3/1/0
controller T3 3/1/1
controller T3 5/1/0
75xx_#confi t
Enter configuration commands, one per line.  End with CNTL/Z.
75xx_(config)#controller T3 3/0/0
75xx_(config-controller)#t1 2 ?
  bert           Start BERT test
  channel-group  Specify a channel-group mapping on a T1 interface
  clock          Specify the clock source for a T1
  fdl            Specify the Facility Data Link for a T1
  framing        Specify the type of Framing on a T1
  loopback       Put the T1 line into loopback
  yellow         Yellow Alarm Configuration for a T1

That's at the T1 level.


On Thu, Oct 07, 2004 at 04:28:05PM -0700, Annu Roopa wrote:
> Hi guys,
> We have a channelized E3 controller which is divided into
> multiple E1's. One E1 is further channelized into 30*64k
> lines. What is required is to provide software loop one of
> the 64k line for testing purposes. I am not able to find a
> way to do this. Whole of E1 is getting looped when i give a
> loop command.
> Is there a way at all or am i having some wrong understanding
> here ? trying to so something which is not possible.Can anyone
> explain why it is not possible if so ?
> Thanks,
> Annu
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