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BT A/B wires
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M.Joshi
Senior Member
Posts: 134
Quote:
Originally Posted by
Rich Webb
On Tue, 3 Apr 2012 14:51:14 +0000, M.Joshi
wrote:
How can I identify which is the A and B wire coming in from outside?
There is no earth wire supplied.
Assuming it's RS-422, when idle the "A" line is negative with respect to
the "B" line.
--
Rich Webb Norfolk, VA
Ah no, I was referring to UK telephone line A/B wires. BT - British Telecom.
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