Multiple T1 transmissions on Cat5E

My question is regarding the transmission of multiple T1 signals on
Category-5E cables bundled together. The reason I have this question is
one of my data center customers decided to extend (48) T1 lines from
the Telco room to IVR equipment over (48) Cat5E cables. Then terminate
on standard 48-port RJ-45 patch panel. The intent is to run 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.

Normally, the way I design T1 cable runs is to either use 56-pair ABAM
and terminate on a DSX panel; or substitute the ABAM with Category-3
and terminate each Cat-3 bundle one for Tx and one for Rx.

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??

 

:My question is regarding the transmission of multiple T1 signals on
:Category-5E cables bundled together. The reason I have this question is
ne of my data center customers decided to extend (48) T1 lines from
:the Telco room to IVR equipment over (48) Cat5E cables.

comp.dcom.lans.ethernet people -might- have an answer. It's a little
outside the normal question range there, but some of the people
there seem to know a fair bit about wiring issues such as
crosstalk effects.