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2 phones numbers on 1 phone line (4-wire)

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2 phones numbers on 1 phone line (4-wire) BETA-32 11-29-2006
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Posted by BETA-32 on November 29, 2006, 1:41 pm


I should probably know this, but....

I have one 4-wire phone line running from the main incoming phone connection
box to a standard phone jack. I want to add a second phone jack next to the
existing one for a second phone line, and I don't want to run a new wire.

So, here's what I am assuming:

1) Inside the existing phone jack, leave the red and green wires from phone
line connected to the red and green connectors inside the phone jack.

2) Then take the black and yellow wires from the phone line and connect them
to the red and green connectors inside the second phone jack for the second
phone line.

I know what to do with the wires on the other end (at the incoming phone
connection box).

But, is number 2 above correct?

If so, when matching the yellow and black wires to the red and green
connectors inside the phone jack, is it better or correct to connect the
yellow wire to the red terminal and the black wire to the green terminal?

Or should it be yellow to green and black to red?

Thanks.



Posted by Jeff Wisnia on November 29, 2006, 2:06 pm


BETA-32 wrote:
> I should probably know this, but....
>
> I have one 4-wire phone line running from the main incoming phone connection
> box to a standard phone jack. I want to add a second phone jack next to the
> existing one for a second phone line, and I don't want to run a new wire.
>
> So, here's what I am assuming:
>
> 1) Inside the existing phone jack, leave the red and green wires from phone
> line connected to the red and green connectors inside the phone jack.
>
> 2) Then take the black and yellow wires from the phone line and connect them
> to the red and green connectors inside the second phone jack for the second
> phone line.
>
> I know what to do with the wires on the other end (at the incoming phone
> connection box).
>
> But, is number 2 above correct?
>
> If so, when matching the yellow and black wires to the red and green
> connectors inside the phone jack, is it better or correct to connect the
> yellow wire to the red terminal and the black wire to the green terminal?
>
> Or should it be yellow to green and black to red?
>
> Thanks.
>
>


The yellow corresponds to the red and the black to the green.

Most modern phones don't care about the polarity of the line but some
old touch tone phones won't dial if they are wired "backwards".

HTH,

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.


Posted by BETA-32 on November 30, 2006, 9:33 am


>
> The yellow corresponds to the red and the black to the green.
>
> Most modern phones don't care about the polarity of the line but some old
> touch tone phones won't dial if they are wired "backwards".
>
> HTH,
>
> Jeff
>
> --
> Jeffry Wisnia
> (W1BSV + Brass Rat '57 EE)
> The speed of light is 1.8*10^12 furlongs per fortnight.

Thanks Jeff. That's exactly what I needed to know. And I guess that's why
I used to hear people talking about making sure the wires aren't backwards
but I don't hear that anymore.

Beta-2K
(formerly WN2FPE -- 48 years ago -- built my own Heathkit receiver and
transmitter; put up a long-wire antenna along the roof ridge of my parent's
house; had the receiver working; and never could get the transmitter to work
so I never got to get on the air with anyone.)



Posted by Terry on November 29, 2006, 2:09 pm


wrote:

>I should probably know this, but....
>
>I have one 4-wire phone line running from the main incoming phone connection
>box to a standard phone jack. I want to add a second phone jack next to the
>existing one for a second phone line, and I don't want to run a new wire.
>
>So, here's what I am assuming:
>
>1) Inside the existing phone jack, leave the red and green wires from phone
>line connected to the red and green connectors inside the phone jack.
>
>2) Then take the black and yellow wires from the phone line and connect them
>to the red and green connectors inside the second phone jack for the second
>phone line.
>
>I know what to do with the wires on the other end (at the incoming phone
>connection box).
>
>But, is number 2 above correct?
>
>If so, when matching the yellow and black wires to the red and green
>connectors inside the phone jack, is it better or correct to connect the
>yellow wire to the red terminal and the black wire to the green terminal?
>
>Or should it be yellow to green and black to red?
>
>Thanks.
>

You can do what you are suggesting but you should consider this. It
is ok to use both pairs of wires but you have to have special
equipment to use the second line.

A 2 line phone will work but a modem or anything other single line
device will always pick the first line. Also, some phone cords only
come with 2 wires. You have to make sure you get a 4 conductor phone
cord.

If you do use both pairs then you should tap off the two line jack and
mount a single jack if you want to use the black/yellow for anything
else.

Or you can buy a jack that has an opening for each line.




Posted by Jeff Wisnia on November 29, 2006, 2:15 pm


Terry wrote:

> wrote:
>
>
>>I should probably know this, but....
>>
>>I have one 4-wire phone line running from the main incoming phone connection
>>box to a standard phone jack. I want to add a second phone jack next to the
>>existing one for a second phone line, and I don't want to run a new wire.
>>
>>So, here's what I am assuming:
>>
>>1) Inside the existing phone jack, leave the red and green wires from phone
>>line connected to the red and green connectors inside the phone jack.
>>
>>2) Then take the black and yellow wires from the phone line and connect them
>>to the red and green connectors inside the second phone jack for the second
>>phone line.
>>
>>I know what to do with the wires on the other end (at the incoming phone
>>connection box).
>>
>>But, is number 2 above correct?
>>
>>If so, when matching the yellow and black wires to the red and green
>>connectors inside the phone jack, is it better or correct to connect the
>>yellow wire to the red terminal and the black wire to the green terminal?
>>
>>Or should it be yellow to green and black to red?
>>
>>Thanks.
>>
>
>
> You can do what you are suggesting but you should consider this. It
> is ok to use both pairs of wires but you have to have special
> equipment to use the second line.
>
> A 2 line phone will work but a modem or anything other single line
> device will always pick the first line. Also, some phone cords only
> come with 2 wires. You have to make sure you get a 4 conductor phone
> cord.
>
> If you do use both pairs then you should tap off the two line jack and
> mount a single jack if you want to use the black/yellow for anything
> else.
>
> Or you can buy a jack that has an opening for each line.
>
>
>
He did write "second phone jack" y'know....

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.


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