Ericsson LBI-39012B - Manual (Page 22)

AEGIS OPERATION
Each channel can be programmed for ANALOG Voice, Aegis Digital Voice,
or Aegis VGE Encrypted Digital Voice mode of operation by programming
the "KEY" variable.
When programmed "DIS", a channel will only operate in the ANALOG
mode. ANALOG voice calls can be easily monitored by unauthorized
persons.
When programmed "DIG", a channel will only transmit Aegis Digital
Voice. Aegis Digital Voice and ANALOG Voice calls can be received.
When programmed "1-6", a channel will transmit Aegis VGE Encrypted
Digital Voice. Valid cryptographic keys must be loaded into the MDX using
the Universal Key Loader. The "PVT" icon (indicating encrypted mode is
on) can be turned on and off using one of the AUX keys or by chosing
"FORCED" as the mode of operation in the programmer.
NOTES
VOICE MODES
Each system in the radio can be programmed for Aegis communications.
Aegis programmed systems have two (2) different voice modes: clear (analog)
and digital. The voice modes are programmmed on a per-channel basis within
each conventional system. A radio must be equipped with the encrypt/decrypt
option before it will operate in Aegis mode.
TRANSMIT/RECEIVE MODE COMPATIBILITY
FOR AEGIS OPERATION
CHANNEL
PROGRAMMING
(TRANSMIT)
CLEAR
RECEIVE
DIGITAL
RECEIVE
CLEAR YES NO
DIGITAL YES YES
Conventional Aegis requires Channel Guard on the channel to operate
correctly.
NOTE
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