telephone cable colours
Hello,
I fitted an extension socket and was reading which colour cable to
connect where. I was using wires with two pairs: blue/white and
orange/white pairs. I read that rarely a third pair (green/white) is
connected to terminals one and six. What were these used for and why
are they no longer used? I am guessing they were used for something
once upon a time otherwise they would not be there.
Thanks,
Stephen.
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