Exclusion - AT&T SYSTEM 25 User Manual

Exclusion

This feature prevents other inside parties from listening in on a
shared line. If you activate this feature while on a conference
call, you will drop all other inside parties. Therefore, when you
set up a conference call, press (EXCLUSION) before you add the
inside conferees.
Activating Exclusion
1
2
3
Display:
Activating the Exclusion feature does not affect the current
display.
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Lift the handset.
Press (EXCLUSION) .
The light next to this button turns on.
Place or answer a call.
The Exclusion feature turns off
NOTE:
automatically at the end of your call.