example of Different T1 configurations.

[sarahr202]

Hi everybody.

From the last thread, I learned we could  have different kinds of t1 connections  i.e some support time slots. some don't. So it pretty much depends upon wic card for T1.

1)Let say we have a wic card that does not support time slots for T1. How can we configure such T1 connection for data? I just need an example.

2) Let say we have a wic card that supports time slots for t1. How can we configure such t1 card for data?

3)And for Voice?

thanks and have a great day.

[Rick Morris · Accepted solution]

The question you have is pretty vague.  I took some liberties to provide some different configs based on real world scenerios.

interface Serial0/0 

 no ip address 

 load-interval 30 

 no keepalive 

 no fair-queue 

 service-module t1 cablelength short 110ft 

 service-module t1 framing sf 

 service-module t1 linecode ami 

 service-module t1 timeslots 1-24 speed 56 

 no cdp enable 

In this interface you can specify the number of timeslots so a ckt that is only 256, then you will use only 4 timeslots.

This is an example of a T1 Frame-Relay config

controller T1 0
framing esf
clock source internal


linecode b8zs
channel-group 0 timeslots 1-24 ! interface Serial 0:0 no ip address encapsulation frame-relay 
no keepalive !
interface Serial 0:0.1 point-to-point 
ip address 209.165.200.252 255.255.255.224 frame-relay interface-dlci 100


Info taken from 

http://www.cisco.com/en/US/docs/routers/access/1700/1721/software/feature/guide/t1e11721.html
http://www.cisco.com/en/US/docs/ios/12_2/12_2z/12_2zl/feature/guide/t1dsu.html