Electronic Alarms and Home Security Devices - What is this jack called?

My lifeline system has an rj31x module that plugs into an rj45 type keystone jack on the wall. The jack is recessed to identify it as the proper one and it has a little PCB on the back. What is this jack called and where can they be purchased.

Thanks

You've stumped me, it almost sounds like a DSL filter.

The fact that you are plugging into a network style jack (and not a rj31x jack) makes me wonder if it's some sort of ethernet translator.

These "lifeline" systems have some proprietary parts.

The phone does plug into an rj31x/dci module and then goes then the module goes into this wall jack using a cat5e cable. Does this help?

Hmmm, lets try a different tack.

What is the brand and model of the lifeline system? This definitely sounds like a proprietary part.

from what I understand, the rj31x allows for an interconnection with the alarm system so that it can seize the phone line when needed.

It merely allows the proper connection of the CO line, the alarm system, and the internal phone system.

So, depending on your rj31x's connections, you would either have screw terminals inside the rj31x or you could have rj45 or some other modular jack in up to 3 inputs. One from the CO, one to the alarm system and one to the internal phone system.

Do you have any literature on the rj31x? If not, what is the brand name?

and what are you looking for?

edit; I went back and re-read the thread. What does this jack you speak of connect to? Plugging a cable into the wall is meaningless. The jack has to be connected to something from the other side.

We have apartments with 2 phone jacks. We use a March networks Mainstreet messenger system. Each jack is a homerun to the phone room where we put tone on the blue pair in jack one. It goes to the apartment where it jumps to the orange pair and returns to the phone room. We then jump tone from the orange pair to the blue pair of the second jack. The system uses what I believe to be a proprietary module that they call a rj31x/dci in between the phone and the wall jack. The phone line brings red,yellow,black,and green into the module where there is a DS4E 14 pin relay and then we exit the module with cat5e but again only use the blue and orange pair. I thought the shorting was taking place in the keystone style ( looks like an rj45 8p) jack with the pcb and the module uses the relay to switch between lines when the alarm is activated. This is my best understanding of the system and do not mind being called an idiot if I got some of it wrong:D March did not supply the wall jacks and they don't know who did and I have one that no longer passes tone. Thanks for the time guys Beer 4U2

Adding some clarity as I learn - The "box" is my rj31x jack as when I connect to an rj45 through the module I get tone passed to a second pair. However, the recessed keystone jack I am looking for also passes tone to a second pair(from blue to brown) without anything plugged in so that I can have tone to the second jack

>bumping please> thank you>

Ok, chum. Here's the little info I can gleam. The Mainstreet Messenger system seems to be a specialized system that routes through a central system located somewhere on the property. It is not a normal phone system nor is it a normal data network.
It's more like a mix between a nurse call and a proprietary telephone system, than anything else.


You will have to deal with the original source of the hardware to get this fixed. If you can get them to sell you the specialized jack, it's probably not a difficult repair, but this is not off the shelf hardware, as best as I can tell.

Well MrRon, I finally found out the proper name of the jack I was searching for. It is an rj48x, which is basically just an rj45 with a shorting bar that connects 1to 4, and 2 to 5. In my application it takes T&R from 1and2 and passes it to another pair on 4and5. Now it's just a matter of finding a source of these with the recessed feature or getting it in a different color to make it stand apart. Do you have a vendor for such things that you would recommend? Thanks Again and Happy New Year to Ya!:thumbup:

Those jacks were actually designed to be used with T1 and ISDN data lines, so it sounds like these folks are using them in a non standard way. The shorting bars were intended to create a loop back for testing and troubleshooting purposes, but they clearly are not using them this way.

I can find lots of sites that tell you how to wire them, but none that actually sell the darned things. Your best bet is to contact a local telecom specialist that does T1 line installations.

Thanks for all your help and Happy New Year!Beer 4U2

accepting your info:

If this jack is actively being used, you can use an rj45 as long as it is terminated per the rj48x pinout requirements. If you need to test, a test loop can be made simply by using an rj45 plug and connect one piece of wire between 1 and 4 and another wire connecting 2 and 5.

as to identifying the jack; you can purchase jacks in myriad colors. Just get one that is unique compared to the others in your installation.