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