[c-nsp] T1 Cables

[Ted Mittelstaedt]

Yes, there are.  I forget the appropriate standard but your supposed
to use individually shielded pairs.  HOWEVER, this doesen't become
a problem unless your going a really long distance such as 500-1000
feet.  The teleco themselves run T1's on 100 pairs that are used as
IDFs inside of high rises all the time without trouble.

One thing I have found that can cause errors like this is clocking.
Traditionally, point to point spans would require one side set to
master clock, the other side set to slave clock.  But these days
telco's run T1's through multiplexers and while they are not supposed
to put clock on to the span, many many times I will have to set both
sides to obtain clock from the network.

Ted

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net]On Behalf Of Vincent Aniello
> Sent: Friday, May 18, 2007 8:25 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] T1 Cables
> 
> 
> Are there cables specifically for use with T1s that we should be using
> to connect circuits to our Cisco routers with integrated CSU/DSUs?  We
> currently use CAT5E cables and have chronic problems with errors on a
> few of our circuits.  The cable length between the smart jack and router
> is 25 feet.
> 
>  
> 
> Thanks.
> 
>  
> 
> V/
> 
>  
> 
>  
> 
> 
> 
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