Need advice on running T1 from Demark to jack

[snidercomm]

Cable Techs,

Was wondering if someone could help me cut through some crap and help me figure out what modular jacks and pin outs are best to use when connecting a T1 line from a Demark to a remote jack, to be patched into a switch/router.

I keep seeing RJ48C but I think that is a ten pin connector, and most of what I have seen has all been 8 pin RJ45. I am almost certain its pins 1245 that are used but is this a 568A or 568B configuration with an RJ45 or neither?

Is it acceptable to use an RJ45 jack ?
With what wiring scheme? 568A or 568B?
Any X-over cables needed?

First time doing a T1 run, any step by step help would be greatly appriciated,

 

[MasterRacker]

This link and the T1 section on this site will tell you what you need.

http://www.celticrover.com/bgtt/rjinfo.asp

Jeff
No matter how bad it is, it can always get worse ....

 

[daronwilson]

That is a great link! To summarize, you should expect your T1 on a RJ48C or RJ48X (wired the same, the X version has shorting pins to loop back the circuit when the plug is out). An RJ45 is ACTUALLY a designation for how to wire an 8 pin modular jack. Just as RJ48C is an 8 pin modular jack wired for T1 data service. So yes, you can use a Cat5 jack and wire it appropriately.

Depending on the distance from the Demarc to your router, you could use a good quality Cat5 patch cable. There are technical limitations to the distance, but in operation it depends on the signal level delivered at the T1 interface. I have seen this method used for 100+ feet with no reported problems. It is a straight through patch cable to the back of your router.

That being said, the most correct way is to use a two pair individually shielded cable, keeping the transmit pairs on one shielded pair, and the recieve pairs on one shielded pair.

Hope that gets you going. Good Luck! It is only my opinion, based on my experience and education...I am always willing to learn, educate me!
Daron J. Wilson, RCDD
daron.wilson@lhmorris.com

 

[MasterRacker]

We just put in a site where we're extending the demarc over 300' on a Cat5 run with no problems at all.
Jeff
No matter how bad it is, it can always get worse ....

 

[BryanZwahlen]

Check the link below. It shows in detail how the cable should be setup. Scroll down to "Loss of Signal".

http://www.cisco.com/warp/public/116/T1_layer1.html#ensuring