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Gear / Technical Help => Cables => Topic started by: InfiniteOhms on January 19, 2007, 02:39:50 PM

Title: Is it possible to make a telephone patch cable?
Post by: InfiniteOhms on January 19, 2007, 02:39:50 PM
Is it possible to make a patch cable that works like this:
(http://img.photobucket.com/albums/v444/infiniteohms/telephone_patch.gif)

Title: Re: Is it possible to make a telephone patch cable?
Post by: twatts (pants are so over-rated...) on January 19, 2007, 03:03:47 PM
Yes.

I used to make these when I was phone-phreaking back in high-school...  Ahhh...  Commodore 64...

Anyways, I'll look around, I think I still ahve some phone-gear...  That should include a 1/8"TRS phone output cable...

Terry

Title: Re: Is it possible to make a telephone patch cable?
Post by: twatts (pants are so over-rated...) on January 19, 2007, 03:07:45 PM
Google reveals:

Two wires (normally referred to as a "pair") are needed for most telephone connections.  One of the wires in a pair is referred to as the "tip" and the other is called the "ring".  Color code schemes are used to identify wires within a cable.

You may encounter two different wire color schemes while working on your phone wiring.

The simplest color scheme is used on normal station cable (what your phone tech may call "JK"), which has only two pairs of wire.  The first pair has one green wire ("tip") and one red wire ("ring").  The second pair has one black wire ("tip") and one yellow wire ( "ring").  For a single phone line, only the green and red pair are normally used.  The black and yellow pair is normally spare and available to install a second phone line.



If I remember correctly, attach tip to green and ring to red.  No cutting involved, just clip in with alligators and you'll be good.

Terry

Title: Re: Is it possible to make a telephone patch cable?
Post by: InfiniteOhms on January 19, 2007, 03:14:16 PM
excellent!  ;D I'm starting to collect gear for a pirate FM radio station and this seems like the cheapest way to do on-air phone ins.  ;D ++T to you!
Title: Re: Is it possible to make a telephone patch cable?
Post by: twatts (pants are so over-rated...) on January 19, 2007, 04:14:24 PM
I actually have a phone microphone that fit on the old school at&t phone (round ear and mouth piece).  I'll send that to you for free if I can find it...

Terry

(http://static.flickr.com/70/188700129_7dc99b69e6_m.jpg)
Title: Re: Is it possible to make a telephone patch cable?
Post by: BayTaynt3d on January 19, 2007, 04:56:47 PM
Cheap units can be had at Rat Shack for $15 I bet...
Title: Re: Is it possible to make a telephone patch cable?
Post by: InfiniteOhms on January 19, 2007, 05:20:18 PM
I actually have a phone microphone that fit on the old school at&t phone (round ear and mouth piece).  I'll send that to you for free if I can find it...

Terry

(http://static.flickr.com/70/188700129_7dc99b69e6_m.jpg)

that would be awesome, just let me know if you find it. Thanks!

Cheap units can be had at Rat Shack for $15 I bet...
Not that i was able to find, if you take a look and find anything I would love to hear about it.
Title: Re: Is it possible to make a telephone patch cable?
Post by: BayTaynt3d on January 19, 2007, 05:43:29 PM

I think this ought to do it. Don't worry about the REM cable, that's for an old-school cassete deck. I'm pretty sure you can just use the mini cable and not worry about the REM cable, but check with your local rat shack geek. Looks like inflation brought it up to $26 now, heh...
Title: Re: Is it possible to make a telephone patch cable?
Post by: BayTaynt3d on January 19, 2007, 05:44:38 PM
Oops, forgot the link!!!

http://www.radioshack.com/product/index.jsp?productId=2062697
Title: Re: Is it possible to make a telephone patch cable?
Post by: rokpunk on January 20, 2007, 07:45:44 AM
(http://www.jkaudio.com/assets/prod-gfx/that-1_01.jpg)
Title: Re: Is it possible to make a telephone patch cable?
Post by: InfiniteOhms on January 20, 2007, 10:35:00 AM
(http://www.jkaudio.com/assets/prod-gfx/that-1_01.jpg)
That is exactly what i'm looking for... plus i like the model # ... to bad its $150. :(
Title: Re: Is it possible to make a telephone patch cable?
Post by: BayTaynt3d on January 20, 2007, 12:22:55 PM
The one I posted was only $25.
Title: Re: Is it possible to make a telephone patch cable?
Post by: InfiniteOhms on January 20, 2007, 12:48:42 PM
The one I posted was only $25.
Yes, its a pretty damn good deal compared ... i just might pick one up. (and thanks for posting that BTW)
Title: Re: Is it possible to make a telephone patch cable?
Post by: china_rider on January 20, 2007, 06:42:59 PM
It's been quite a while since I used one... But years ago I had some legal problems with an old roommate trying to screw me over for about $6k.

At least in AZ it is legal to record telephone calls as long as *one* party is aware of it.  I was able to goto RatShack and they had a device that attached to the back of the phone handset (the plastic part) and would send any conversation out to be recorded through an 1/8" jack.  Quality was surprisingly good for a conversation, not sure for music,  and when we went to court he did not know about the recordings and I got punitive damages of about $4k and lawyers fees, missed work, etc.
Title: Re: Is it possible to make a telephone patch cable?
Post by: rokpunk on January 21, 2007, 12:07:01 PM
Do you just need one for a short time? I can lend you a THAT-1 for a few weeks if you don't need to keep it forever.
Title: Re: Is it possible to make a telephone patch cable?
Post by: Lil Kim Jong-Il on January 21, 2007, 02:09:39 PM
Is it possible to make a patch cable that works like this:

I don't think you want to split a POTS line cable directly into your recorder line input.  Ring voltage is around 90Vrms.  That suction cup microphone from RS is a safer solution.

Title: Re: Is it possible to make a telephone patch cable?
Post by: twatts (pants are so over-rated...) on January 22, 2007, 05:48:39 PM
PM me your addy and I'll send you the old school phone thingy...

Terry

Title: Re: Is it possible to make a telephone patch cable?
Post by: InfiniteOhms on January 26, 2007, 02:27:02 PM
PM me your addy and I'll send you the old school phone thingy...

Terry

PM sent ... many thanks!!

Do you just need one for a short time? I can lend you a THAT-1 for a few weeks if you don't need to keep it forever.

Thanks for the offer, i dont even need it yet... me and some friends are working on getting a pirate radio station going and once its up i'd like to a weekly or monthly "radio open mic" where people could call in and play a song or read something etc. It will probably be at least a month before we can go on the air.
Title: Re: Is it possible to make a telephone patch cable?
Post by: rowjimmy on January 30, 2007, 01:25:26 PM
This page might be useful:
http://www.audiotheater.com/phone/phone.html