While you wait for answers, we may have found some information which could help you.
Success
Message
BT Studio 1500 triple set?
BT Studio 3500 base problem?
telephones?
Bt 3500 cordless tel/answerphone?
how to repair BT 3500 Studio phone base (Master) unit?
Permanent engaged tone on BT Studio 1100 handset?
how can i fix a bt graphite 1100phone?
Beeping phone BT Studio 1100?
How do I connect my own answering machine?
How can i show calls made to my phone?
how do i record a telephone conversation on a bt synergi 5500 cordless anse?
bt 1100 twin need to replace broken 2nd handset?