
4000 Digital Series II Issue 1.4 Panel User Guide
STA0380 Page 143
4.15.6 Loudspeaker
Audio is output from the loudspeaker unless the Headset Select is engaged.
4.15.7 Headset Select Pushbutton
The Headset Select Pushbutton is used to select headset operation. The red LED is illuminated to
indicate that the headset microphone is active and the detachable microphone and loudspeaker are
muted.
4.15.8 Soft Pushbutton
Press the pushbutton to enable the Control Panel Soft Mode operation. The red LED is illuminated.
Another press will return the Control Panel to normal operation.
4.15.9 Auxiliary Volume Control
Turn the Auxiliary Volume Control clockwise to increase the auxiliary channel volume, or anti-clockwise
to decrease the volume. The auxiliary channel is not always used.
The current setting of either the Main or Auxiliary Volume Control is displayed as a level bar on the Reply
Key, above the Reply Key text. Turning these controls clockwise or counter-clockwise, increases or
decreases the length of the relevant control bar.
The most recently moved control is displayed. If the Auxiliary Volume level setting is displayed and the
Auxiliary Volume Control is static for 2 seconds, the display reverts to showing the Main Volume level
setting. (The auxiliary level bar is displayed as a broken line to distinguish it from the main level bar).
The level bars are graded in 0.5 steps from a minimum setting of 0.0 (off) to a maximum setting of 10.0
(approximately +12 dB). Each 0.5 step corresponds to 1 pixel of the level bar. The default setting for both
controls is 5.0 (approximately 0 dB).
Contact Vitec Group Communications for suitable External Loud-
speaker options
Your panel loudspeaker reduces volume automatically when a talk key
is pressed. This is to help reduce the chance of howlround (audio
feedback) occurring.
Consult the Section “LCD Key Panel Soft Mode” for Soft Mode pro-
gramming description.
Auxiliary level indicator
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