While you wait for answers, we may have found some information which could help you.
Success
Message
binatone shield 6015 twin phone set?
Fix answer machine number?
keeps saying out of range?
How do I connect my own answering machine?
flashing new message light when call has been answered?
how can i fix a bt graphite 1100phone?
How can I get my telephone/answering machine (model 29870ge1-A)to work?
information needed?
base 1 again?
how do i record a telephone conversation on a bt synergi 5500 cordless anse?
BT Studio 1500 triple set?
Day Display - How do I alter?