DACS Digital Audio Control System
Operators Manual
Rev: 1.00 Page 14
DACS_813-0100
CONFIDENTIAL AND PROPRIETARY TO COBHAM
3.5.3 Call Priority
In ISO mode a passenger may use the call switch on their ACP to contact the crew.
When the ISO/CALL switch is pressed by a passenger, CALL will be indicated on the
crew ACP unit(s). The crew can cancel ISO mode to acknowledge the call or if the call
is not answered it can continue or be set and will automatically cancel after the DevCS
'call time out' period has expired. If the crew have not answered (i.e. cancelled ISO
mode) a subsequent call can be given High Priority status or override can be selected
using remote call and override buttons that can be connected to the AMU50.
The function of the CALL buttons on any passenger ACP can be configured
through DevCS to allow the CALL button to initiate a normal call, a high priority call or to
override the isolation mode.
3.6 Transmit Features
3.6.1 User Priority
If a user has keyed a specific transceiver no other user can access that transceiver
for the duration of the transmission.
3.6.2 Transmit Time-Out
The system has a stuck microphone (transmit key-line shorted to ground) timeout
feature. After 30 to 120 seconds (adjustable through the DevCS), the transmit key
input signal is overridden, the selected radio will stop transmitting and the transmit
indicator on the user’s Audio Control Panel will no longer be displayed. The timer is
reset once the transmit key-line is no longer grounded.
At installation, this feature may be disabled through the DevCS.
These commodities, technology or software are controlled in accordance with the United States Export Administration Regulations, Export Classification
Control Number(ECCN) 7E994. When exporting, diversion contrary to U.S. law is prohibited.
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