how to configure a t1 controller on a 2901 router?

kope · ‎02-02-2011

hi,

i have trouble to get the serial card (2nd genteration T1 card) on up/up state on a 2901 router.

the SP guy who installed the rj48 at the demarc says it was tested good.

For some reason, it is on up/down state no matter what i tried. Can someone please look at the config below to see if something obviously missing here?

my config is as follows:

card type t1 0 0

!

controller T1 0/0/0

cable length long 0db

channel-group 0 timeslots 1-24

!

interface serial0/0/0:0

ip adress x.x.x.x 255.255.255.252

(i configured this as ESF frame, B8ZS...although it did not show up on the real config, must by default)

Thanks.

jmunoz19 · ‎02-02-2011

I believe it defaults to HDLC encapsulation. Try typing in "encapsulation ppp" under the serial interface.

kope · ‎02-03-2011

ppp encap fixed the problem. the default was hdlc.

Thank you!

richarz87 · ‎02-03-2011

Hi,

Make sure that you have the same lineCode and Framing Set on both sides of the Router, After this, you need to Shut/noShut the Controller and try to do loop testing with ISP in case if the issue persists.Controller Config Should be something like this below For Eg:,

card type t1 0 0

!

controller T1 0/0/0

framing esf

linecode b8zs

cablelength long 0db

channel-group 0 timeslots 1-24

!

Thanks,

Richard.

Latchum Naidu · ‎02-03-2011

Hi,

The interfaces should show up regardless of whether you configure them.

When you do a sh run or a sh interfaces you should see all available interfaces in the router whether enabled/disabled or configured/unconfigured. I would suggest you to reseat the WIC cards and make sure they are detected.

Find the below config may help...

controller t1 0/0
framing esf (should match the other side mostly esf)
line code b8zs ( do )
clock source independent
ds0-group 1 timeslots 1 - 10 type fx0-ground-start

Here most of the config depends on the type of device you are connecting to. If connecting to Telco/ISP they may give you some details like framing, line coding etc. You can also configure the Pri-group if you want to use CAS.

Please rate if this helped you...

Regards,

Naidu.