RJ31 Jack

[jbrots04]

Thanks in advance for any help.

I need to install a RJ31 jack in our wiring closet for a new alarm system. Does anyone know the pinouts or anything about RJ31 jacks. I'm having some trouble finding out on the web.

Thanks,
Jeff

 

[jerryreeve]

On almost all RJ-31 blocks it is embossed on the coverplate.

One common is pins 1 and 8 are the inpair from telco and 4 and 5 are the pair to the telephone equipment

http://www.shout.net/~wildixon/telecom/rj/rj31x.html

http://www.shout.net/~wildixon/telecom/rj/rj38x.html

Mind like a Steel trap - Once used forever clamped shut.

JerryReeve
Communications Systems Int'l
com-sys.com

 

[TouchToneTommy]

Actually, pins 4 and 5 should come from the Telco, and pins 1 and 8 are the return to the phone equipment. Be sure to use a REAL RJ-31X jack with the "shorting bars", so if the alarm equipment is unplugged, to line is still extended to the phone equipment. The links you reference ARE correct; the terminology is confusing, as "To Network" is the side to the Telco, and "To Telco Wiring" is the side to the phone equipment.

 

[Servamatic]

You can find the USOC configurations in the downloadable file below.

http://www.servamatic.net/cd/servamaticcd.zip

Richard S. Anderson, RCDD

http://www.servamatic.net

 

[ANFPS26]

Another link:

http://www.shout.net/~wildixon/telecom/rj/rj31x.html

Jim

 

[jerryreeve]

TTT all the references are showing 1 and 8 from the telco and 4 & 5 to vendor network. Do you have any references that show otherwise?

Mind like a Steel trap - Once used forever clamped shut.

JerryReeve
Communications Systems Int'l
com-sys.com

 

[TouchToneTommy]

It's the terminology on those references that "sounds" backwards. Remember that these are from USOC manuals that were written for the Telco installers, who installed them originally. So when it says pins 4 & 5 are "To Network", it means the side closest to the central office. Where it says "To Telco Wiring" it means the side towards the jacks or equipment.

 

[jerryreeve]

Ya, I remember that now. thanks

Mind like a Steel trap - Once used forever clamped shut.

JerryReeve
Communications Systems Int'l
com-sys.com