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CALLMASTER and CALLMASTER II and III Voice Terminals
MUTE Button
All CALLMASTER sets have a MUTE button, a fixed feature button. The Mute feature allows the
user to be in a listen-only mode. On the 602 CALLMASTER, the MUTE button light is green; on
the CALLMASTER II and III, the light next to the MUTE button is red.
Note: Although the default setting for the Mute feature is ‘‘Enabled,’’ the Mute feature can
also be disabled. For directions on disabling the Mute feature, or enabling it again,
see ‘‘Programming the Options’’ (555-015-161).
SELECT button
The CALLMASTER II and III voice terminals have a SELECT button that can be used in two dif-
ferent ways: (The green light next to the SELECT button goes on steadily when the SELECT but-
ton is activated.)
Used with the CONFERENCE/RING button to select one of eight personalized ringing
patterns for incoming calls;
Used with the DROP/TEST button to initiate the Self-Test feature which tests the lights,
ringer, and display.
VOLUME control button
The 602 CALLMASTER has a volume control slide switch behind the front panel. This slide
switch controls the volume of the tone ringer.
The CALLMASTER II and III terminals have a VOLUME ‘‘arrow’’ button with a double function.
When the user is on a call, the VOLUME button controls the volume of incoming transmission on
the headset or handset whichever is being used; when the user is not on a call, the VOLUME
control button adjusts the tone ringer. When the user sets the volume for the headset or handset
or for the tone ringer on the CALLMASTER II and III, the display on the voice terminal shows a
‘‘bar array’’ that indicates the volume setting.
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