declared scanning will stop and restarts only after the emergency has been cleared.
Receiving an Emergency Call
When receiving an emergency call on the selected group and system, an alert beep is heard
and 
comes on. The message *RXEMER* flashes in the display on line two until the emergency condition is cleared.
Declaring an Emergency Call
To send an emergency call to selected system and group (or on an optionally preprogrammed group), proceed as follows:
1.Press and hold the red EMERGENCY button that is on top of the radio in front of the antenna for approximately one second (this time is programmable and therefore could be longer or shorter; check with the system administrator). The radio will transmit an emergency call request with the radio ID until an emergency channel assignment is received.
2.When the working channel assignment is received, the radio sounds a single beep indicating the radio has auto keyed (see Auto Key) and is ready for voice transmission. *TXEMER* flashes on line two in the display until the emergency is cleared.
3.Press PTT and speak into the microphone in a normal voice. 
and 
momentarily turns on.
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