Thanks for your answer. So I need to buy a new BT phone with Call Guardian on it. However if I do so, will my other 4 Handsets work ok with it, and Call Guardian will work for my setup.
I think I understand. I will really need a new BT Phone as recommended to get the Call Guardian system installed on my incoming line.
However do I have to throw awy the other handsets I have all round the house? They are currently all BT 6500 phones. My question is - If I buy a new suitable Call Guardian phone (such as you are suggesting) with answerphone,to put as the main receiving instrument, will I still be able to keep the other handsets and will they be compatible with the new Call Guardian handset?
Or are you saying I need to replace all my instruments?
PLease note the existing equipment has call blocking, but less efficient I think than Call Guardian.