I can't get a connection from my 2nd phone line and I'm baffled after
troubleshooting using several methods.
First, I went to the box outside and plugged in a phone tester tool and
dialed a special number that identifies the number of the line. I
successfully identified two lines and found that the red/green is the
primary #, and the yellow/black was the secondary. I traced the one line
that comes into the house from the outside box and this contains four
colors. This one line splits into pairs into a screw block that splits the
lines into two by using dual screw bolts that each pair is stranded into.
Finally, I installed a brand new line from the block that contains the
yellow/black to a phone jack and threaded it to the jack's yellow/black -
but still no dial tone.
Can you help tell me what I've missed?
If you installed the new line to a jack and used the yellow/black, you are
not using the correct pair for the jack.Even though you are using the
yellow/black pair from the block which is the second pair, the new jack
needs to run on the first pair, which would be the red/green at the final
destination. So, take the yellow/black wires and connect them to the
red/green of the new jack. See if that takes care of it.
Did that make sense?
The final jack where you are going to plug in a standard phone
should have the Y/B wires connected to the R/G terminals. The
phone still expects to draw dial tone from pins 3&4 of a 6
position RJ-11 jack, regardless of what wires carried the signal
into the house.
Thanks - that worked, but then what are the yellow/black jacks (and what are
the four other colors) that are included in the jack that I'm using there
PS - I'm using a jack supplied with my alarm system and it has a larger
cable than an RJ11. It almost seems larger than an RJ45 Ethernet connector.
They used to be used IIRC to power the ringer and lighted dials; now, all that
stuff draws power from the same pair of wires that carry the signal.
The main use now is to carry two lines on a single cable, one line using
red/green and the other line using yellow/black. You can buy splitters just
about any place that sells telephone wiring equipment that plug into a single
jack wired in this manner, and provide two jacks, one for each of the two
lines. The splitter does nothing except connect the red/green pair in the wall
jack to the red/green pair of one of the splitter jacks, and the yellow/black
pair in the wall jack to the red/green pair of the other splitter jack.
Doug Miller (alphageek-at-milmac-dot-com)
My alarm panel uses an RJ31-X jack and plug.
It's 8 pins wide, and the jack has some spring shunts that are designed to allow
the phone circuit to connect through the alarm system, but the alarm can be
disconnected without disconnecting the house phones.
There is also a pair for the alarm to be able to detect that it's been
I can transcribe the wiring info if you need it.
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