T1 cable length 1

[zoomaster]

I have to run a T1 cable from 81C dual PRI card on 4th floor to 1st floor to connect Gateway. I am planning on using cat5e cable with Rj45 each end and a mod D kit RJ45 to DB15 for the back of the 81C. The total length is about 160 to 180 ft. has anybody used cable length of 180ft and worked or do I require Pairgain amplifiers for this?

 

[Rudh]

Should work ok. If your using a T-1 CSU they have settings for cable length from 133 to 633ft.

 

[phonz1]

I agree, should work fine, real issues come in at 400' plus. What I have done is use 2 csu's in that case....

 

[telebub]

I'm running 10 PRI tie lines between 2 Option 81 systems using dry cable pairs out of a 600 pair feeder. Like phonez1 said, I just have CSUs on each end. Works great.

War Eagle!!

 

[zoomaster]

Has anyone tried a T1 over 180 ft distance without using a csu? I am wondering how far the 81C can drive the digital signals before csu's are required?

 

[johnpoole]

yes.. we don't use csu's at all.. i've ran one 10 floors and across the building through old cat 4 tie cable with out a problem..

if i see distance problems i move the smart jack closer.. same tie pairs just higher voltage..

i've also tied two switches together with just a tie cable as the pri's.. no csu's at over 1.4 of a mile.. this was for 6 weeks while we did a cut, but it ran clean


john poole
bellsouth business
columbia,sc