Problem with T1 card configuration

[Colin Higgins]

I have a 2851 router with a T1/E1 HWIC card installed in slot 0

I am attempting to configure a simple T1, but the system is not letting me configure the serial interface

this is the config I have so far :

card type t1 0 0

no network-clock-participate wic 0

no network-clock-participate aim 0

controller T1 0/0/0

framing esf

linecode b8zs

cablelength short 133

channel-group 1 timeslots 1-24

!

controller T1 0/0/1

framing esf

linecode b8zs

cablelength short 133

channel-group 2 timeslots 1-24

and interfaces

Serial0/0/0:1              unassigned      YES unset  down                  down    

Serial0/0/1:2              unassigned      YES unset  down                  down

show up, but I can't get into them.

01-P1-2851_Voice(config)#int Serial ?

  <0-2>  Serial interface number

01-P1-2851_Voice(config)#int Serial 0 ?

% Unrecognized command

01-P1-2851_Voice(config)#int Serial 0/0/0:1

                                          ^

% Invalid input detected at '^' marker.

something I am missing?

[Georg Pauwen · Accepted solution]

Hello,

try and add the following (in bold) to your controllers:

controller T1 0/0/1

framing esf
linecode b8zs
fdl both
clock source line
cablelength short 133
channel-group 2 timeslots 1-24 speed 64
crc-threshold 500

Also, can you post the output of 'show version' ?

[Colin Higgins]

I discovered that you have to start with channel-group 0 which produces interface Serial 0/0/0:0

for some reason, it won't accept starting with channel-group 1

[Georg Pauwen]

Colin,

honestly I have not seen that documented ever, anywhere. Good that you found out !