Stormin Mormon wrote:
In the 1980s, I had a two line cordless telephone. Panasonic, I think.
Much as you describe, black and yellow were "line 2". Worked very
nicely, actually.

Can't remember which colors hooked to which ones. But you have only
two choices of hookup. And many modern phones are not polarity
sensetive.


The bad news is that many of the simpler two line phones are polarity
sensitive. If you reverse either pair you can have cross talk and or
idle both lines.
--
Tom Horne

"This alternating current stuff is just a fad. It is much too dangerous
for general use." Thomas Alva Edison