Tyco Electronics M/A-COM, M7300 Series 9.8 EMERGENCY OPERATION , 9.9 SYSTEM SCAN OPERATION

Emergency and Special Call are not operational during conventional failsoft. In

addition, the GRP control will not operate.

9.8 EMERGENCY OPERATION

The radio's ability to declare an emergency, clear an emergency, remain locked on an emergency and

group, and the emergency audio and display freeze can each be enabled or disabled through

programming. When an emergency is declared scanning will stop and will restart only after the

emergency has been cleared.

When receiving an emergency call from the selected group and system, an alert beep is heard and the

BSY indicator lights. The message *RXEMER* flashes in the display on line 2 until the emergency

condition is cleared. Follow standard emergency procedures.

To send an emergency call to the selected system and group (or on an optionally pre-programmed

emergency group), proceed as follows:

1. Press and hold the red emergency button 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 (Autokey alert

tone) indicating it is ready for voice transmission. *TXEMER* flashes on line 2 in the display until

the emergency is cleared.

3. Press PTT and speak into the microphone in a normal voice.

4. Release PTT when the transmission is complete and listen for a reply.

5. The emergency can be cleared by pressing and holding the CLR button followed by pressing the red

emergency button then releasing both buttons.

9.9 SYSTEM SCAN OPERATION

The radio can be programmed with the following System Scan features. These features are automatically

enabled upon radio power up. A key or menu option is also defined to allow the System Scan features to

be toggled during radio operation. This is covered in the Menu Selection and Pre-Programmed Keypad

Key sections. The System Scan state will be maintained through system changes but will default to ON at

power up.

The M7300 Series mobile radio can be programmed for wide area system scan operation for multi-site

applications. Upon the loss of the currently selected system's control channel, radios can be programmed

to automatically scan the control channels of other systems. If a new control channel is found, the radio

will switch to the new system and sound an alert tone.