While you wait for answers, we may have found some information which could help you.
Success
Message
BT Studio 4500 cordless telephone?
Battery cover?
How can I mend my BT4600 (1+1) phone?
How can i get my handset to speak with the caller?
Problem with handsets?
TAM FULL on Binatone 1420 Single, base holds old messages th?
Mute?
Fix blank screen in cordless hand set CLP99483?
Bt 4600 phone?
How do i clear the TAM?
BT 4600 twin one handset bot ringing?
How can I repair my phone?