"The Natural Philosopher" wrote in message
...
Dave Plowman (News) wrote:

In article ,
The Natural Philosopher wrote:

Ther are only two wires which connect you to the exchange, and the way
round they are is not important.


It's not 'important' how you connect mains line and neutral either in
that
most things will still work. But not good practice.


I am FAIRLY sure that any phone/PABX 'to spec' WILL work. those thet
take power have full wave rectifiers and I am ALMOST sure that teh voice
signal has to be tansformer coupled anway..

Some cheap faxes and fax modems don't do ring detect properly and could fail
on a line reversal. But who uses faxes anymore ;-)