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AEGIS Private, ProVoice Private, And Voice Guard Private Modes
The Aegis, ProVoice and Voice Guard private modes allow the radio to
transmit encrypted messages and receive clear or private transmissions. The
radio will transmit private if the group/channel is programmed for private
operation and forced operation is pre-programmed.
If the radio was pre-programmed for autoselect, the radio will transmit in
the following modes;
•Private mode enabled, transmission always in private mode.
•Private mode disabled and private call received. Reply transmission
will be private mode if made during scan hangtime. If reply
transmission occurs after scan hangtime, transmission will be in clear
mode.
Aegis or ProVoice transmissions cannot be received by a radio set to
receive a Voice Guard transmission. Accordingly, Voice Guard or ProVoice
transmissions cannot be received by a radio set to receive an Aegis
transmission and niether Aegis or Voice Guard transmissions can be
received by a radio set to receive ProVoice.
Cryptographic keys are transferred to the radio 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-group/channel basis according to the
radio's programming. Groups and channels within Aegis, ProVoice, or
Voice Guard systems can be programmed for keys 1-7. Up to 8 banks of 7
keys can be stored for Aegis (DES and VGE) systems.
DES radios require a DES Keyloader (Option V4025 with software version
3.n or later). VGE radios require a VGE Keyloader (Option V4028 with
software version 2.n or later).
When operating on a group or channel programmed for private mode, all
transmissions will be private transmissions and the radio will receive clear
and private signals. The PVT keylight (Sys te m Mo de l) o r O P TI ON keyli g ht
(Scan Model) turns ON when the private mode is enabled. If the selected
group or channel is programmed for autoselect capability, the mode may be
toggled between private and clear with the PVT button (System Model) or O
button (Scan Model). Radios programmed for forced private operation do
not allow a change of the transmit mode; therefore, the PVT button (System
Model) or O button (Scan Model) has no effect.