Operating and signal voltages??

[MarkIsTrying]

Okay, I have a somewhat strange question (or at least I think it is) regarding connecting a line for a Partner telephone extension through a channel on an audio snake...to get an extension located in a sound booth at a church.

They want to place a telephone extension in the sound/multimedia book at their church. But, they don't want to run a new line to it (difficult is an understatement).

The question I'm trying to answer is "is there any reason we can't use one of those open channels on your audio snake to run it?"

I did a search on the web and found a couple of RJ11 to XLR adapters and of the 2 the one that looks the best to me is located here:

http://www.markertek.com/Cables-Con...io-Binding-Posts/Fluke-Electronics/7286.xhtml

I guess my question is, is there a problem with doing this or should everything be just fine? The line would run to the audio snake that is back stage and then in the booth another connector, linked to above, would be placed in-line and the RJ11 phone line connected between it and the phone. And the system is the Partner ACS system.

So, expanding on the question -- what is the operating voltage and ringing voltage? I've posted this question on a church sound forum and got varied responses, several saying it shouldn't be a problem unless a lot of voltage was being pumped through that channel which might jump across the lines if the shielding was faulty anywhere in the audio snake.

Give me your input. Good idea or not? Done this before somewhere??

Thanks in advance!

 

[mforrence]

A partner phone uses two cable pairs, while an RJ11 only supplies one. You could use this with an analog telephone hooked to a partner station port and it would likely work fine. But it won't work with Partner keyset. In theory, you could bond together TWO sets of these and make it work. Keysets also prefer twisted pair cable, so you may run into an issue on this account.
Mike

 

[MarkIsTrying]

Ok, thanks for your response! I guess I thought since the Partner system utilizes just standard telephone cords and cables then there wouldn't be a problem; I thought the connections were the same as a standard/analog set.

So basically the only way to get an extension back there would be use a standard telephone set instead of a Partner set (they have an 18D they were wanting to use). I think they wanted the system phone so they could see what extensions were in use and also have the flashing light by the line that has an incoming call (since the ringers will be set to 'no ring' for each line).

 

[mforrence]

Partner DOES use standard telephone cords - but cords with two pair (typically referred to as RJ14 vs RJ11). Analog set uses one pair. Again, you may be able to bond two of these together in order to create the required two pair. You could use a "two pair splitter" device on each end to marry them together. Of course, this would require TWO spare snake channels.
Mike

 

[MarkIsTrying]

Okay, I understand now. I will see if that is what they want to do; I know they do have at least two channels open.

So aside from the two-pair issue, would the voltages cause a problem, you think? That was the question I was asked to make sure it wasn't so high that it might cross-over and end up damaging some equipment or something. I wasn't sure of operating and/or ring voltages since it is a system extension. Any idea on that issue?

Thanks for the input thus far!

 

[mforrence]

48VDC is max idle voltage, ring will be 50VAC max. Since the cables won't touch any other electronics, I wouldn't worry about damaging anything else.
Mike

 

[MarkIsTrying]

Okay, thanks. I had tried a search for the idle voltage and ring voltage (on Google and here) but in that brief search hadn't turned up anything. That helps, too.

 

[SYQUEST]

Are all the wire channels on the snake 2-wire shielded? Just wondered if the snake had any 4-wire channels? Some snakes have a "com" channel or other multi-wire arrangement.

By the way the designation "RJ" anything refers to Modular Jack hardware with the specific wiring arrangement for telephone service, or a certain type of circuit, NOT a line cord or jack on a telephone set!!

....JIM....

 

[mforrence]

@SYSQUEST - I'm a firm member of the RJ bandwagon. Nothing can drive me quite as nuts as a spec requiring RJ45 jacks when I know they plan to use them for Ethernet. By using the term "typically referred to as...", I had hoped to caveat my response, yet get across the fact that the partner uses a 4-wire circuit, nothing more.
Cheers!
Mike