Re: Multiple T1 transmissions on Cat5E

Tech Geek wrote: 
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??


I routinely get away with running two T1's on one 4 pair cat5 cable, distance of about 75 feet. I got 11 T1's total, over six cat5e cables, all in the same cable tray, all bundled together with tie wraps.

No issues. Works fine.

Your mileage may vary.


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Relevant Pages

  • Re: Multiple T1 transmissions on Cat5E
    ... > Category-5E cables bundled together. ... > the Telco room to IVR equipment over Cat5E cables. ... > and terminate on a DSX panel; or substitute the ABAM with Category-3 ... > individual Category-5E/6 cables next to each other will cause ...
    (comp.dcom.cabling)
  • Multiple T1 transmissions on Cat5E
    ... Category-5E cables bundled together. ... 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 ...
    (comp.dcom.cabling)
  • Multiple T1 transmissions on Cat5E
    ... Category-5E cables bundled together. ... 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 ...
    (comp.dcom.telecom.tech)
  • Multiple T1 transmissions on Cat5E
    ... Category-5E cables bundled together. ... 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 ...
    (comp.dcom.lans.ethernet)
  • Multiple T1 transmissions on Cat5E
    ... Category-5E cables bundled together. ... 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 ...
    (comp.dcom.sys.cisco)