RE: Frame-relay with T1

From: Mike Williams (ccie2be@swbell.net)
Date: Mon Sep 22 2003 - 22:48:25 GMT-3


My friend,

If you are connecting a T1 directly to the router, there is a CSU/DSU
involved....... There has to be. The CSU is built-in to the card
itself. When you configure the 'service-module t1" to set the clocking,
framing, linecode and number of channels used (timeslots), you are
actually configuring the built-in CSU (i.e. if you have an external
CSU/DSU connected to a serial port, the main things you set on the
external CSU/DSU are clocking, linecode, framing and # of channels).
Once you have the "service-module" configured, if you can run PPP over
the line, you should be able to run FR over the line. Also, keep in
mind, that you can (and should) use a subinterface for point-to-point
T1s (as you can designate a serial subinterface as point-to-point,
whereas if you use the main (physical) interface it's considered
point-to-multipoint).

HTH,
Mike W.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Rajagopal S
Sent: Monday, September 22, 2003 9:15 AM
To: Kurt Kruegel; ccielab@groupstudy.com
Subject: Re: Frame-relay with T1

Hi Kurt,
 
Thanks for the info.
 
The doc only shows about configuring FR on an interface which has a V.35
interface. There is a CSU-DSU which converts the T1 signals. But this is
not my scenario.
 
I have a router which has a direct T1 card and the T1 line coming from
the DOT directly lands on the router without a CSU/DSU.
 
As given below, a normal T1 link works fine end to end when we have the
encapsulation as ppp. I wanted to know if it will work with FR.
 
Cheers
Raj

Kurt Kruegel <kurt@cybernex.net> wrote:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_configur
ation_guide_chapter09186a0080080fdc.html

----- Original Message -----
From: "Rajagopal S"
To:
Sent: Monday, September 22, 2003 6:53 AM
Subject: Frame-relay with T1

> Hi guys,
>
> Is FR possible with a T1 interface ? Am in India and never worked with

> a
T1 interface. Is there any documentation for this ?
>
>
> interface serial0/1
>
> no shutdown
>
> service-module t1 clock source line
>
> service-module t1 timeslots 1-4 speed 64
>
> service-module t1 framing esf
>
> service-module t1 linecode b8zs
>
> ip address 10.30.30.1 255.255.255.252
>
> encapsulation frame-relay
>
> frame-relay interface dlci 101
>
>
>
> Will this config work ?
>
>
>
> Cheers
>
> Raj
>
>
>
>
>
>
>
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