14221-1850-2000, Rev. A
57
4.28.3 Emergency Declaration
Emergency declaration is accomplished by the radio generating an MDC Emergency PTT message. An
Emergency is considered acknowledged when the radio receives an “Ack To Emergency” PTT message
with an ID which matches its own ID. If Emergency Audio is enabled and the PTT Sidetone option is
enabled, the radio plays the Ready-to-Talk tone after the MDC Emergency PTT signaling is transmitted.
• If an MDC Alert on ACK is enabled, the radio plays an ACK tone when the MDC emergency is
acknowledged.
• If audio tones are enabled, the radio plays an ACK tone if the emergency is not acknowledged within
the programmed number of retries.
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