While you wait for answers, we may have found some information which could help you.
Click here for Set Phone ModelBt Duet 700?
can my BTeasIcom 1000 corded telephone be repaired?
How can I fix my Binatone 3525 phone?
Ryobi battery charger?
RCA 25255RE2 Corded phone?
What sequence is the wire to the main inbound plug?