Ericsson AEGIS EDACS M-PA Narrowband 9600, Руководство оператора

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VOICE MODES
Aegis programmed systems have three (3)
different voice modes: clear, digital and private.
The voice modes are programmed on a per-
group basis (for group calls) and on a per-system
basis (for individual, telephone interconnect, sys-
tem all and dynamic regroup calls) for trunked
systems. Voice modes are programmed on a
per-channel basis for conventional system.
Clear Modes
In Aegis clear mode the radio transmits and
receives only clear (analog) voice signals. These
analog signals are non-digitized and non-en-
crypted. Clear mode transmissions can be easily
monitored by unauthorized persons. Groups and
channels programmed for clear operation cannot
transmit or receive Aegis digital or private mes-
sages.
* Assumes the proper cryptographic key is
loaded.
Aegis Digital Mode
Aegis digital mode allows the radio to transmit
and receive digitized voice signals. Aegis digital
signals provide improved weak signal perform-
ance and they cannot be easily monitored with a
standard receiver. Groups and channels pro-
grammed for Aegis digital operation transmit only
digital signals and they can receive clear and
digital signals. In other words, with a certain group
or channel selected, the operator cannot change
TRANSMIT/RECEIVE MODE
COMPATIBILITY
FOR AEGIS OPERATION
GROUP/CHANNEL
PROGRAMMING
(TRANSMIT)
RECEIVE CAPABILITY
CLEAR DIGITAL PRIVATE
CLEAR Yes No No
DIGITAL Yes Yes No
PRIVATE Yes No Yes *
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