short in telephone line

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  #1  
Old 12-21-00, 02:53 PM
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I had a 2nd line turned on by the phone company and the tech that came to the house said the line was working ok up to the house but that it looked like there was a problem with the ground with the line in the house.. Checked the line and installed new jack myself and it worked finew for about 4 days them iut just stopped working. can't see what the problem is please help.
 
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  #2  
Old 12-21-00, 03:06 PM
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Take out all the phone jacks in your house and look for potential shorts or opens. In most cases, the jacks are daisy-chained together, so an open circuit affect all the ones downstream. Make sure that all jacks connect the line 2 wires coming in to the line2 wires going out. If you have any doubts about your service, take a phone out and plug it into the test jack in the Network Interface.
 
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Old 12-21-00, 03:11 PM
Wgoodrich
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Your telephone works on what the call a tip and a ringer. The only place that I know of where there is a ground is at the box where your phone company stops and you start the house wiring. There is a ground wire that is required to be run from that outside box to a grounding source, usually the ground rod of the electrical system.

I would confirm that your ground is run outside to that ground rod. I suspect that is what he is talking about.

Now as for your phone not working. I would go to the outside box where the phone company connected, and open it look for a jack that you can plug a phone into. plug in a line one and line two adapter into that jack and then plug a phone into line one of the adapter jack. Then test that line by dialing out and listening for a dial tone. Then repeat the same test again on the second line by plugging your phone into line two of that adapter jack.

If you have both lines operating right then go to your first phone jack inside your home. If you do not have both lines then disconnect the house wiring from that test jack in the outside box and test again. If you still don't have both phone lines then call the phone company back they have the problem, because you have eliminated the house.

If you do have both lines at that jack but don't when you wire the house into that outside jack then go to the first inside jack on the circuit and disconnect all wires there. If you get the phone lines back outside then go back inside and connect the incoming lines to your jack only. Now test the two phone at that first inside jack with the rest of the house disconnected. If you have both lines working then go to the second phone jack and disconnect all wires and go back to the first phone jack and connect the outgoing wires to that second jack. Now test again and repeat until you have both phone lines throughout the house.

Good Luck

Wg
 
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Old 12-21-00, 03:50 PM
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You might also check your existing lines with a voltmeter. On a good phone line, you will read a minimum of 50 volts DC. Check each one of your phone jacks for this voltage, and if you read considerably less than 50 volts on the old jacks, replace them, and see if that does it for you. Termination posts on a phone jack can appear brand new to the eye, but in actuality be junk. If all of your jacks are reading around 50 volts DC, you may have a short somewhere in the line inside the house. The only ground for a telephone line is outside, usually at or around the electrical service entrance.

Originally posted by erica4249
I had a 2nd line turned on by the phone company and the tech that came to the house said the line was working ok up to the house but that it looked like there was a problem with the ground with the line in the house.. Checked the line and installed new jack myself and it worked finew for about 4 days them iut just stopped working. can't see what the problem is please help.
 
  #5  
Old 12-21-00, 08:36 PM
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phone line troubleshooting

This second line that quit after four days, was it? It worked O.K. until then?

And then the line just went flat dead, did it? Any static or hum on the line before it went dead?

Follow the advice and check the second line at the network interface jack. If you have dial tone there, it's your inside wire (IW). Keep in mind that there's a short in the IW, you'll have to disconnect the line at the interface and wait 5 minutes for the phone co equipment to reset. That's a self-protection feature at the telco central office. When you pick up your phone to dial out, the line is shorted (the tip and ring leads, or positive and negative in electrician's terms). This is a signal for the switch at the central office to give you dial tone. If you don't dial out in a certain amount of time, the switch cuts you off, because there are only so many lines that can be served dial tone at one time.

To check your IW, use a continuity tester or better an ohm meter. With line two IW disconnected from the interface, and all instruments unplugged from the line two jacks, check resistance across the line. Ought to be infinity. zero resistance means a dead short--the tip and ring are touching, usually due to sloppy jack wiring, or a nail or something across them. Resistance between a kohm and many megohms is a "high joint" short, maybe due to a bad (corroded) splice or a short caused by dirty water across the tip & ring.

Water is usually the culprit when static or hum appears on a line that was working O.K. Sometimes the problem will go away as the wiring dries out, sometimes the problem gets worse. A line going dead suddenly sometimes is due to rodent chewing, or someone working in the attic/basement/crawlspace who snagged and broke a wire.

To fix the problem, try another pair if there's an unused one in the cable. We call this "cutting to clear". Even in a 1800 pair cable, eventually you run out of spare pairs...then you have to run a new cable. Same in your situation. If you don't have a spare pair, time to crawl...

Good luck.
 
  #6  
Old 12-21-00, 09:00 PM
Wgoodrich
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Trunkpuncher, you give good advice. Good detail and reasoning explained

Keep up the good work

Wg
 
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