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#12066 - 02/13/04 08:37 AM blink short
Dilpo Offline
Junior Member

Registered: 02/13/04
Posts: 2
Loc: USA
hey i am kinda new at this but got to thinking and not wanting to do something stupid on accident decided to see if someone had some input for this. I was thinking, if you just got a wire and connected the green and red wire in the telco box outside someones house it should short out the line. I duno just assuming it would, now if I just got those little christmas light lines with one christmas light on it and put the blinky kind in would it switch on and off the short? It would be kinda funny if the prankee picked up their phone and the dial tone came on for 3 seconds and cut off for 3 ect. Just wondering if there is any merit to this, again i was just sitting in my room making a cheap ass beige box as my first thing to play with and got to thinking. Thanks

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#12067 - 04/30/04 05:01 PM Re: blink short
n0mel Offline
Junior Member

Registered: 04/30/04
Posts: 34
Loc: ...
shorting the line is what old phones used to do to put the line on hold. Since the on hook state is dertermined by the line current, a short looks like the phone is off the hook to the telco. I don't remember the box's name, but there was one that exploited this. I can't remember exactly how it went, but I believe you would have someone call you, then you would use a resistor to decrease the current going through the phone, so the telco would think the phone was still on the hook when it actually wasn't. it would allow you to talk for like 15 minutes or something (before the telco would stop ringing, which is normal). quick search on google didn't come up with anything. anyone remember the name of this box?

the available current is so low (9v at 600 ohms, I=E/R, I=9/600=15mA) that you couldn't power a christmas light with it. but, you could easily set up something like you're saying, just with lower power components. I like the idea >

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