[Asterisk-Users] Re: Shielding of T1/E1 cables WAS RE: Pinouts for T1/E1 crossover

[Kevin P. Fleming]

Rich Adamson wrote:

> I've never bothered to check to see if cat5 cables use the appropriate
> mating twisted pairs or not. Since the pinouts are different for cat5 vs
> T1 cables, I'd have to guess a single strand is used from two different
> twisted pair groups. That wouldn't be cool, but in short runs it
> probably doesn't have much of an impact.

They are fine, actually, other than color-coding difference. Since
Ethernet-on-twisted-pair standards were derived from existing telco
standards for cabling, the pairing in the 8-position connector is
compatible.