Pinouts for T1/E1 crossover cable WAS "RE: [Asterisk-Users] what cable to connect a legacy PBX to a TE410P ?"

[Leo Ann Boon]

Rich Adamson wrote:

> <snip>
> For short runs, the use of cat5 vs proper T1 cables isn't likely to 
> have any impact unless there is a fair amount of induction from 
> electrical noise, etc. That can take the form of florescent fixtures, 
> transformers, older CRT monitors, etc, etc.
>
> On longer runs, the shielded T1 cables are likely to provide better 
> results particularly if there happens to be any electrical noise.
>
> Oh, and if shielded T1 cable is used, the shield at each end of the 
> cable must be grounded. (Let's see how many can figure out how to do 
> that via an rj45 plug. ;)

Totally agree with you, unshielded cables are only usable if the 
distance is short. Just curious, how should one ground the shield? Do 
you ground it to the ground bar in the server room? Any special 
requirements?

TIA