User Manual

14221-1200-2000, Rev. A
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6.14.1 Receive an Emergency Call
When receiving an emergency call from the selected group and system, an alert beep sounds and the BSY
indicator illuminates. The message *RXEMER* flashes in the display on line 2 until the emergency
condition is cleared. Follow standard emergency procedures.
By default, The ID of the radio declaring an emergency appears in the display until the emergency
hangtime expires. After the hangtime expires, the radio displays emergency (with no ID) until the
emergency is cleared. If enabled via radio programming, the radio continues to display the ID of the radio
declaring the emergency until the emergency is cleared.
6.14.2 Declare an Emergency
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 transmits 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 – see Table 6-4) 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.
6.14.3 Emergency Lock
If Emergency Lock is enabled via radio programming, the radio locks on the group or channel after an
emergency is declared. The radio user cannot change to another group or channel until the emergency is
cleared.
6.15 ENCRYPTION
The XG-100M mobile radio supports AES, DES-OFB, and DES-CFB encryption. Encryption protects
against unauthorized reception and use of radio communications. DES encryption uses 56-bit keys, while
AES uses 128, 192, or 256-bit keys. Since every additional bit doubles the number of keys that must be
attempted for decoding, this makes AES significantly more robust than DES.
When operating on a group or channel programmed for encryption, all transmissions are encrypted. The
radio receives unencrypted and encrypted signals.
To enable or disable encryption for the system/group/channel displayed:
1. Scroll through the menu until PRIVATE is displayed.
2. Press the MENU button to toggle between encrypted and unencrypted.
Or
A button on the control head or HHC can be programmed to toggle encryption on or off.
appears on the display when encryption is enabled.