phone line not working

[deggers316]

my friends home phone is not working.BT automated phone line checker says there is a fault between exchange and his home which there are going to fix Monday,so how come his b/band router is working fine when it use the same line from the exchange?

[4candles]

This can and does happen, as the broadband signal is AC, at radio frequency, and therefore able to pass over a small disconnection or high resistance joint.

The telephone relies on having a good DC path. If the broadband is working, chances are that it will be at a lower speed than normal.

[deggers316]

thanks for that
4candles, very interesting,
i will check his speed,

[4candles]

OK deggers. When the fault is fixed, it could be up to 5 days before the broadband speed restores to normal.