While you wait for answers, we may have found some information which could help you.
Success
Message
Bt Duet 700?
BT Synergy 3505 I can't hear them but they can hear me?
BT Telephone extension?
moving phone supply point?
Base not working properly?
BT DIVERSE X10 ADD HANDSET PROBLEM?
my phone crackles?
Radio cordless phone?
can my BTeasIcom 1000 corded telephone be repaired?
BT external connectors?
Additional handset/base?
How To Straighten A Tangled Corded Telephone?