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MDC 1200 system operation
The MDC 1200 signaling system enhances your trans-ceiv-
er’s capabilities. It allows PTT ID*, Emergency signaling, and
receiving Radio Check. Also, the dispatcher can stun and re-
vive transceivers on the system.
An additional feature of MDC 1200 system found in Icom
transceivers is called aliasing. Each transceiver on the system
has a unique ID number. Aliasing allows the substitution of an
alphanumeric name for this ID number. For transmit, you can
use this alias to select a transceiver to call. For receive, the
alias of the calling station is displayed instead of the ID.
* When
[.TT]
is pushed and/or released, the transceiver transmits
your own station ID.
D
Receiving an Emergency Call
q
When an emergency call is received;
• Beeps sound.
• The calling station ID (or alias) and “EMG EMG” are displayed
alternately.
w
Turn power OFF, change the channel, push [PTT] for reply-
ing the call, etc. to stop the beep and display indication.
D
Transmitting an Emergency Call
The MDC 1200 system Emergency feature can be accessed
using the
[Emergency]
key (p. 5). The transceiver will send
an Emergency MDC 1200 system command once or repeat-
edly for a programmed number of times until it receives the
acknowledgement signal.
The emergency call can be transmitted without a beep emis-
sion, and the LCD indication change depends on how emer-
gency is programmed. Ask your dealer for details.
D
Receiving a Stun and Revive
The dispatcher can send MDC 1200 system signals that will
stun or revive your transceiver. If a Stun command is re-
ceived that matches your station ID, the transceiver will dis-
play “SORRY” (default) and you can not receive or transmit.
When a Revive command is received that matches your sta-
tion ID, normal operation is restored.
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BASIC OPERATION