While you wait for answers, we may have found some information which could help you.
Success
Message
BT 4600 twin one handset bot ringing?
BT Studio 4500 cordless telephone?
How do i clear the TAM?
My bt freestyle phone don't ring or con?
How can i get my handset to speak with the caller?
How can I repair my phone?
BT 4600 phone problem?
Battery cover?
Bt 4600 phone?
TAM FULL on Binatone 1420 Single, base holds old messages th?
Problem with handsets?
How can I mend my BT4600 (1+1) phone?