While you wait for answers, we may have found some information which could help you.
Click here for Bt Studio Flashing Base 1how do i record a telephone conversation on a bt synergi 5500 cordless anse?
How can i show calls made to my phone?
telephones?
Permanent engaged tone on BT Studio 1100 handset?
how can i fix a bt graphite 1100phone?
Beeping phone BT Studio 1100?