Emergency Operation; Aegis Operation; Voice Modes - Ericsson EDACS MDX Operator's Manual

Emergency Operation

If the pre-programmed groupset on the currently selected system contains
an EMERGENCY/HOME group and the radio is in dynamic regroup, the radio
will exit dynamic regroup and declare the emergency on the HOME group. If
no EMERGENCY/HOME group is present, the radio will declare the
emergency on the currently selected dynamic regroup group.
Each channel or talk group (EDACS) 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 or talk group will only operate in
the ANALOG mode. ANALOG voice calls can be easily monitored by
unauthorized persons.
When programmed "DIG", a channel or talk group will only transmit
Aegis Digital Voice. Aegis Digital Voice and ANALOG Voice calls can
be received.
When programmed "1-6", a channel or talk group 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.

VOICE MODES

Each system (trunked or conventional) 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 programmed on
a per-group basis within each trunked system and 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
GROUP/CHANNEL
PROGRAMMING
(TRANSMIT)
CLEAR
DIGITAL
34

AEGIS OPERATION

NOTE
FOR AEGIS OPERATION
CLEAR
RECEIVE
Yes
Yes
DIGITAL
RECEIVE
No
Yes