Re: Multiple T1 transmissions on Cat5E

Tech Geek <oelissa@xxxxxxxxx> wrote:
> each T1 on an individual Cat5E cable (ie. Tx & Rx within
> each cable). My cusomter claims that there would be no
> intereference between all these T1 lines running together
> in the cable tray. The distance is over 100 feet.

I don' t have direct experience with that many T1s, but I
wouldn't expect any problems over such a short distance in
such tightly twisted wire. There's a lot of power (current)
in a T1, but twist tames power.

> I was taught by an SBC engineer once that running more
> than 6-7 T1s in individual Category-5E/6 cables next to
> each other will cause interference or cross-talk. Is this
> true from your knowledge and experience??

What I've heard is there is a limit to the number of T1
that will run cleanly per cable binder-group (25pr). 1 is
fine. 2-3 usually work. 6+ is trouble. This depends on wire
guage, twist (Cat1 - 3) and cable feet.

-- Robert




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