Panasonic KX-TD612E 手册

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页码 284
General Features
214
Features Guide
Privacy, Automatic
Description
By default all conversations established on CO lines, extension lines, and doorphone lines have 
privacy enabled.
Conditions
Automatic privacy may be temporarily released for a three-party conference, which is 
established by Executive Busy Override.
Programming Guide References
No programming required.
Features Guide References
User Manual References
Not Applicable