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TWayne TWayne is offline
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Default really old phone lines

Ralph Mowery wrote:
"wendylee815" wrote in
message ...

-------------------------------------

we just bought this house and want to put a phone in the
kitchen..unfortunatly, the wires are bare....now we bought the jack
and went to install it, and found that there are only three wires
coming out of the hole, red, green and yellow..no black,,,
how can we install this new jack to an old line that has only the
three colored wires?


Phones normally use just two wires. Hook up the red and green wires
and forget the yellow.

Most of the time the phone wires will only have areound 12 volts on
them. While the phone rings there is around 90 volts on the line.
This voltage probably will not kill you but it sure can be painful.


EEK! Wrong voltage! The nominal DC voltage
on a phone line (on hook) is 48 volts DC.
The (off hook) voltage can be anywhere
between 6 and 12 volts DC. It's the (off
hook) loop current in milliamperes that
important. 15-36 ma is what I typically
see. The US standard ring voltage is 90
volts AC at 20 Hz unless you're on a party
line and the ringers will be of the type
that are filtered to ring at different
AC frequencies. The 48 volts can tingle
but the 90 volts will definitely bite you.
Don't strip a live phone line with your
teeth because that's the exact moment that
one of those damn telemarketers will decide
to call. If you're looking for good info
on phone systems and a source of parts, try
http://www.sandman.com/ I've purchased
phones and parts from the company for years.
Oh, the green (tip) and red (ring) wires
are the only ones you need for a standard
single line telephone as was previously
mentioned.

I'll bet you don't know what an "octothorp"
is. It's a part of every pushbutton phone.
*snicker*

[8~{} Uncle Monster


Heck, it's just the column 3 row 4 key (#)!