DRAKE 4000 series II Guide de l'utilisateur Page 41

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4000 Digital Series II Issue 1.4 Panel User Guide
STA0380 Page 11
3.3.10 Headset Socket (DIN 5)
The 5 pin Headset Socket is used to connect an optional headset for use when the gooseneck
microphone and panel loudspeaker are not required.
(Headsets should be used in areas where a number of control panels are used in close proximity, this
should avoid any possibility of howlround (audio feedback) occurring).
3.3.11 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 main gooseneck microphone and panel
loudspeaker are muted.
3.3.12 Reply Key
This DAK is designated to respond to any unscheduled calls. The green LED indicator on the REPLY
Key only flashes to signal the presence of an unscheduled call, when a DAK is unavailable, (i.e. to
indicate that the call can only be responded to by the Reply Key).
The Reply Key can only respond to the call mnemonic displayed (or last caller). All other incoming calls
are placed in a queue and have to be accessed in turn. The latest call is placed at the front of the queue.
The maximum number of calls in this queue is ten.
3.3.13 Auxiliary Volume Control
Turn the Auxiliary Volume Control clockwise to increase the auxiliary channel volume, or anti-clockwise
to decrease the volume. The volume level indicator LED changes colour according to the volume setting;
green indicates a low setting, green and orange an intermediate setting and orange a high setting.
The auxiliary channel is not always used.
Consult the Vitec Group Communications Installation Guide for fur-
ther details.
A panel fitted with a PDE4537 options card can have an external line
level auxiliary input.
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