D.
Call
: Each wired intercom port (2-Wire only) can be individually set to send and receive a CrewCom-generated
call signal to/from a connected wired intercom system. To do so, turn that port’s Call function
ON
. Turning the
Call function
OFF
only prevents the signal from entering or leaving CrewCom via the respective port. Call
signals can still be generated and transmitted by entities across CrewNet. The default setting for Call is
OFF
.
See
for more information.
Figure 28
Intercom Type Options
E.
Mic Kill
: Each wired intercom port (2-Wire only) is capable of receiving a mic kill signal from a connected
wired intercom system. Each port is capable of sending a mic kill signal to connected RTS and AudioCom
systems. The mic kill signal is passed through to any Conference associated with the intercom port where the
signal came through. Turning the Mic Kill signal
OFF
only prevents external mic kill signals from entering or
leaving CrewCom via the respective port. Mic Kill signals can still be generated and transmitted by entities
across CrewNet. The default setting for Mic Kill is OFF.
Note
: CrewCom does not send Mic Kill signals to Clear-Com 2-Wire systems.
F.
Echo Cancellation (ECAN):
Echo Cancellation (ECAN) assists in reducing echo from 2-Wire and 4-Wire
intercom connections.
For 2-Wire ports, hardware connections need to be optimized with the null procedure to minimize echo in the
physical link so that the software can reduce any residual echo. ECAN is on by default in 2-Wire (it is off by
default in 4-Wire).
If a port is never utilized in a system, ECAN can be turned off to ensure that it cannot create undesirable
effects. This should not be necessary, though, and it is highly recommended that you keep ECAN on at all
times for 2-Wire connections. It is better to leave ECAN off for 4-Wire connections unless it is necessary on a
given port.
ECAN is disabled while the Control Unit’s Auto Null menu screen is active to ensure that the hardware is
optimized for echo reduction.
Operation - 54
Summary of Contents for Crewcom CCU-22
Page 1: ...Control Unit OPERATING MANUAL...
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