I've just replaced an original BT extension with a new cable run. The
previous extension was made of of lots of old bits of wire with several
joints etc. The total run length was about 75 metres and worked perfectly.
I just ran 4 x 80m Cat5e cables using 2 as phone extensions, both buzz!! Any
ideas as to why a scrappy old bit of BT wire doesn't buzz and my new shiny
twisted pair does?
Do the new cables run alongside mains cables - whereas the old one didn't?
Are you sure that you have used the pairs correctly - and not mixed them,
which would defeat their noise-cancelling mechanism.
If it has appeared please ignore my previous incorrect statement
about 2 doing nothing, it is obviously quite important :-). (Can't
even claim it was the effect of cider either).
Another likely cause is if a different phone is used or possibly even
relocated. A friend has BT phone (can't recall model) which works
fine in all sockets bar one. The fault is nothing to do with the
socket but a mains cable near where the phone lead hangs down induces
massive hum but on only this one phone. Others used in the same
socket are OK.
Peter Parry WPP Ltd http://www.wpp.ltd.uk
Antenna solutions for car, caravan, house, office, boat and tent.
Maintained the correct pairs and polarity? The line (pins 2 & 5)
should be one pair and pins 3 & 4 another.
How did you fix the cable, leg of a staple through insulation?
Long shot, what about the 2 spare pairs in each cable, open or short
at each end?
Dave. pam is missing e-mail
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