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Turoa Kiwi

JH
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1634610517179.png
 

Varmintmist

Bear, with furnture.
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From what I remember the green was the tip(transmit) and the red was the ring(receive) the yellow and black are more recent addition and they were used with phones that had a lighted dial. Many installers would not connect them on the older phones and the older houses only had a two wire cable going from the street to the house.
Tip is the ground and ring is the -48. Its a talk path, there is no transmit and receive. It supplies 48vdc that the AC created by your voice into the transmitter rides on.

The lighted dial came way later. A transformer was added, normally in the basement and the yellow black were tied to that. Party lines were phasing out at that time. A lot of original inside wire was two wires under seperate sheaths and it was atatched to your baseboard with what looked like thumbtacks. That was changed to a 3 conductor with red green yellow, then RGYB, then twisted pair to carry multiple lines inside the house without crosstalk. All drops have 2 wires per line. Its only been the last 20 years that multiple pairs under one sheath were in a drop as a matter of course. Still, only 2 conductors from office to set.
 

Uncle-A

In the words of Paul Simon "You can call me Al"
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10,981
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NJ
Tip is the ground and ring is the -48. Its a talk path, there is no transmit and receive. It supplies 48vdc that the AC created by your voice into the transmitter rides on.

The lighted dial came way later. A transformer was added, normally in the basement and the yellow black were tied to that. Party lines were phasing out at that time. A lot of original inside wire was two wires under seperate sheaths and it was atatched to your baseboard with what looked like thumbtacks. That was changed to a 3 conductor with red green yellow, then RGYB, then twisted pair to carry multiple lines inside the house without crosstalk. All drops have 2 wires per line. Its only been the last 20 years that multiple pairs under one sheath were in a drop as a matter of course. Still, only 2 conductors from office to set.
Who did you work for?
 

Varmintmist

Bear, with furnture.
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Who did you work for?
United tel, United tel a Sprint co, Sprint United tel, Sprint with a 6 slash logo, Sprint with a 4 slash logo, Embarq, Centurylink, and it looks like Apollo next.
I&R, cable, CO, special circuits, and now CO again, hopefully for not to much longer. Party lines on bird wire, to multi mode fiber. Good analog signal to crap VOIP noise.
 

dbostedo

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