Telephone

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 Question by Cameron Clark posted 28 Apr 2004
 Telephone
Added 3rd line to home....telco connected and told me green & white/green was the pair to connect to my punchdown block. (1st line is blue & White/Blue and 2nd line is orange & white/orange). When I connect both sides matching green & white/green to my punch down block..i get nothing. Tried multiple lines with same result. For grins I connected previously working Blue & White/Blue leads to tmy green & white/Green source row and line 3 works. Glad all three lines have dial tone but not sure why that works and why the green & white/green pairs or the orange & white/orange pair will not work when connected to the same row.?
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 Answer by Joseph Golan posted 28 Apr 2004
Dear Cameron,
First the telco information is correct as to pair colors and line numbers.

I would need more information to help you find your problem.
What jacks and what type of pin-out was used at the jacks that you are trying to connect to?
Is this a three line telephone or 3 single line telephones?
If it is a three line telephone do multiple line come in on a single jack? if so How many lines/Jack?

Briefly, regarless of the jack type or "normal" wiring, line 1 (white/blue) is always on the center two pins of a jack. if it is a six conductor jack then it is on pins 3 & 4, If it is an 8 conductor jack then it is on pins 4 & 5.

Line 2 now gets a little trickier because there are 3 possible "normal" senarios.
1. 6 conductor jack (RJ-25) 2nd line is on pins 2 & 5
2. 8 conductor jack wired to RJ-61x & T568A line 2 is on pins 3 & 6
3. 8 conductor jack wired at T568B pins 1 & 2 (This one willnot work with most standard telephone equipment.

Line 3 now gets a little worse
1. 6 conductor jack pins 1 & 6
2. 8 conductor jack wired to RJ-61 pins 2 & 7
3. 8 conductor jack wired to T568A pins 1 & 2
4. 8 conductor jack wired to T568B pins 4 & 5

There are numerours sources of these various pinning standards. Check this site for a single source of all these that I have mentioned as well as some additional to see if this helps you sort out your wiring.
http://www.hubbell-premise.com/Technical/ModularJackWiring.htm

If you do post a follow-up question, please address me as "Joe" and the other experts will bypass your question and leave it for me to answer.



Sincerely,
Joseph Golan, RCDD

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