Bought the BT handsets but will not work with my Virgin account, I get line is busy on all handsets. Called their tech support who were notable to help. Is this a compatibility issue or do I need a micro Filter?
presume you need CALLER ID active on the line to block calls, same as you would on a BT circuit?
...seems odd you would get line busy when you pickup the phone. Dont believe you need a filter as the circuit is presented in a different way to typical BT
but check your manual for the phone