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Group/Channel Encryption Key
Figure 19: Group/Channel Encryption Key Display
Key Zero
All cryptographic keys can be zeroed (erased from radio memory) by pressing
the MONITOR/CLEAR button and while still pressing this button, press and
hold the OPTION button. Press both buttons for 2 seconds. A series of beeps
will begin at the start of the 2 second period and then switch to a solid tone
after the keys have been zeroed. The display will indicate
KEY ZERO
.
If the cryptographic key(s) are zeroed, one or more keys must be transferred
from the Keyloader into the radio before private communications may
continue.
Private Operation
Receiving an Encrypted Call
When receiving, the radio automatically switches between clear or private
operation. If the transmission being received is an encrypted transmission, it
will be decrypted, the icon is displayed, the receiver will unsquelch and the
message will be heard in the speaker. For this to occur the selected group or
channel must be programmed for private operation and the correct
cryptographic key must be loaded into the radio.
Transmitting an Encrypted Call
1.
Select the desired group or channel
2.
Place the radio in Private Mode by pressing
key, then follow the
selection mode rules. On a System radio, the
key can be used to
toggle the Private Mode ON/OFF. When Private Mode is enabled, the
icon is displayed.
If the last state of the radio was Private Mode, the Private Mode will be
enabled on power up. Also, the Private Mode will be enabled if forced
operation has been programmed in the radio.
