Phone line

[bdeal4122]

I'm having an issue I've never had before. I was asked to setup a user with a caller ID phone which means I have to switch them from an analog line to a digital.

When hooked up to an analog line, their phone works great. When I change it over to a digital, I get no display and no dial tone. I gave them a digital phone and I know the TN I picked works because I hooked it up to another desk and had a display and dial tone. I also know that I am punching them down to their correct desk location because every time I put the analog line back, it works.

Any suggestions?

 

[KCFLHRC]

Very possible the TN is disabled or polarity is reversed

 

[bdeal4122]

I know the TN isn't disabled because I hooked it up to another desk and it worked fine. I then immediately hooked it up to this other desk and it didn't work.

Also, what do you mean by polarity is reversed?

 

[Firebird Scrambler]

The pair of wires feeding the digital phone are the wrong way round.

Firebird Scrambler

Nortel & Avaya Meridian 1 / Succession & BCM / Norstar Programmer

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[bdeal4122]

You guys are never going to believe this, but I thought about this last night and the one thing I didn't change out was the cord that goes from the wall to the phone. I changed that this morning and the phone lite up right away. I just don't understand why that cord worked when it was digital, but didn't when it was analog. Oh well, I'm so happy it works. Thanks for the suggestions!

 

[phones1]

in the UK analogue works on pins 5 & 2 while digital is connected to 3 & 4, you must have a similar/ equivalent setup world wide....

Remember if it doesn't work hit it harder

Scott UK

 

[bdeal4122]

Correction: It did work when it was analog, but didn't work when it was digital with the first phone cord.

 

[KCFLHRC]

Analog sets are not polarity sensitive as are digital. So the center 2 pins on the jack or in your case the cord from the wall to the set wasn't correctly wired. That's why it didn't work. A standard North American 4 conductor line cord actually has the 2 center pins reversed if you look at it.