Siemens 600 Series - Manual (Page 138)

6–6 ROLMphone 300/600 User Guide
Automatic Privacy
If your telephone has been assigned the Automatic
Privacy feature, no one can bridge (or join) your calls
unless you turn off the feature.
To turn off Auto-
matic Privacy ➩ During a call, press the PRIVACY key, or press
TRANSFR and dial # # 2.