Originally Posted by Dan the Van:
“Hi,
Can someone please detail what a BT Line test does.
Although I have noise on my phone line the test says 'No Fault Found'
Many thanks.”
it basically tests to see if there is a NTE5 at the end of the line(which proves continuity, i.e dis faults).
checks for partial/rectified loops(causes noise and bell not ringing problems,also no dial tone)
then checks the resistance of each leg to earth and battery(also causes noisy faults).
it also tests the capacitance of each leg(i.e possible hr dis or contact fault).
could go into more detail but my fingers would tire.
basically the test system was designed to test the line for pstn services and as a result unless your experiancing a complete loss of service, or very very noisy line it will usually always line test o.k.
could you give a bit more detail on your noise fault? i.e do you have b/band? is it noisy continuously or intermittant? is it noisy at the test socket of the nte5 with a standard corded phone(nothing else plugged in)? is it only noisy when the b/band router is connected to the line?