BT 1250/1300/1800
Your phone may not ring when the answer machine is on due to the 'VIP' feature.
To rectify this:
Bt1250 / 1800 Press INTERCOM OK 4 7 up/down till 0 then OK
Bt1300 up ok, up ok, down to 4 -
"Answer" ok, down to 7 - "VIP Access" ok,
ok.
There should NOT be a tick in the left hand box.