Icom IC-F5123D Operating Guide - Page 6

2 MDC 1200 OPERATION ■ Transmitting a call D PTTID Calls The transceiver can send an MDC 1200 system signal that includes PTTID when [PTT] is pushed (begin transmitting) and released (stop transmitting). If a PTTID call is received, the transceiver will display the calling station's ID (or alias) and sound a beep.* (*Depending on the preprogramming.) D Transmitting an Emergency Call When [Emergency] (described in the instruction manual) is held down for a specified time period,* the emergency signal is once or repeatedly transmitted on the specified emergency channel. When no emergency channel is specified, the call is transmitted on the operating channel. The repeat emergency signal is automatically transmitted until you turn OFF the power. Depending on the preprogramming, receiving an acknowledgement may cancel the transmission. If you want to cancel the Emergency function, hold down [Emergency] for the preprogrammed time period again before transmitting the call. If your transceiver is programmed for Silent operation, you can transmit emergency calls without the beep sounding and the LCD display changing. IMPORTANT: Setting an individual emergency channel is recommended for dependable emergency call operation. *Depending on the preprogramming, the following functions can be automatically activated. Ask your dealer for details. D NOTES • Auto TX function After an emergency call transmission, audio from the microphone is automatically transmitted for a specified time period. • The HM-148G or HM-152 hand microphone is required. • Auto RX function After an emergency call transmission, the transceiver stands by in the audible mode for a specified time period. 3