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14221-1850-2000, Rev. C
The radio goes through transmit and receive cycles if so configured. Speak into the
microphone while the radio is transmitting or press PTT to talk.
3. To exit emergency, power cycle the radio or select EXIT EMERGENCY from the CALL menu.
If enabled via programming, you can clear an emergency by pressing the button programmed
for the Monitor/Clear function and then the emergency button.
4.29.2
Receiving an Emergency Call
When receiving an Emergency Call, an alert beep sounds (if tones are enabled) and an
emergency indication is displayed. The unit ID and/or unit name of the unit in emergency is
displayed. While the emergency display is active, press PTT to respond to the emergency caller.
4.29.3
Stealth Emergency
The radio can be programmed with the following emergency behavior:
No audio indications when declaring an emergency.
•
No visual indications when declaring an emergency.
•
No audio and no visual indications when declaring an emergency.
•
During stealth mode, the radio will not receive any type of call. Once the user presses the PTT
button, the radio display and audio return to normal.
4.30 MDC-1200 (ANALOG CONVENTIONAL ONLY)
MDC-1200 is a legacy in-band signaling protocol that provides the radio with the ability to transmit
and receive a unique PTT ID. This PTT ID can be decoded by receiving radios and displayed as
a hexadecimal number or an alias string. In addition, MDC-1200 provides radios with the ability
to transmit emergency status to a console. Refer to the MDC-1200 Feature Manual, publication
number 14221-7200-6000, for complete instructions on configuring and using this feature.
4.30.1
Normal PTT Operation
If MDC signaling on PTT press is enabled using RPM2, the radio transmits an MDC PTT ID
message when PTT is pressed. If the Sidetone option is enabled using RPM2, the radio plays a
Ready-to-Talk (RTT) tone after the MDC pre-signaling has been transmitted.
If MDC signaling on PTT release is enabled (using RPM2), the radio transmits post-call MDC
signaling when PTT is released.
IF STE is enabled using RPM2, the MDC post-call signaling is transmitted after STE is sent
•
on PTT release only.
•
MDC post-call signaling is also sent when there is a radio unkey due to Carrier Control
Timeout (CCT). Normal CCT alert tones occur prior to unkey.
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