Ericsson AEGIS M-PA, Operator'S Manual

Page: 17 / 40

the radio must be equipped with the optional en-
crypt/decrypt feature and the transmitting and receiv-
ing units must have identical cryptographic keys.
Aegis transmissions cannot be received when
the selected channel is programmed for Voice Guard
operation. Accordingly, a Voice Guard transmission
cannot be received when the selected channel is
programmed for Aegis operation.
Cryptographic keys are transferred into the ra-
dio using a cryptographic Keyloader. Up to seven (7)
different cryptographic keys, numbered 1 - 7, can be
transferred from a Keyloader and stored in the radio.
An individual key is automatically selected on a per-
channel basis according to the radio’s programming.
Channels within Aegis modes can be programmed
for keys 1 - 6. Channels within Voice Guard modes
can be programmed for keys 1 - 7.
DES radios require a DES Keyloader (option
V4025). Operating details on the DES Keyloader are
contained in LBI-31541. VGE radios require a VGE
Keyloader (option V4028). See LBI-31685 for oper-
ating details on the VGE Keyloader.
When operating on a channel programmed for
private mode, all transmissions will be private trans-
missions and the radio will receive clear and private
signals. The "PVT" status flag in the display turns on
when the private mode is enabled. In Aegis Scan and
System models, the mode may be toggled between
private and clear using the PVT button If the selected
channel is programmed for switched capability. Ra-
dios programmed for forced private operation do not
allow a change of the transmit mode; the PVT button
does not function.
Transferring Keys Into The Radio
The following procedure outlines basic key trans-
ferring steps.
1. Turn the radio off.
2. Plug the modular connector of the Key-
loader cable into the Keyloader’s modular
jack.
Before private messages can be sent or
received, one or more cryptographic keys
must be transferred into the radio from the
Keyloader.
NOTE
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