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7.11.2
Selecting Clear Transmissions†‡
Procedure:
Press the preprogrammed
Secure/Clear
button to the clear secure mode.
• If the selected channel is preprogrammed for secure-only operation, when you press the
PTT
button, you hear an invalid mode tone and the display shows
SEC TX
.
• The radio does not transmit until you toggle the
Secure/ Clear
button to the secure mode.
• You can request to configure the radio to ignore the clear voice or insecured transmission
when the radio is in secured transmission. Check with your agent for details.
• If the “Ignore
Secure/Clear
Switch when Strapped” programming option is enabled, the radio
transmits without displaying any messages in the strapped mode of operation, regardless of
the
Secure/Clear
switch setting. This option must be preprogrammed by a qualified radio
technician.
• The
Secure/Clear
switch only applies when the radio is transmitting.
7.11.3
Managing Encryption
This chapter explains the encryption feature on your radio.
7.11.3.1
Loading Encryption Keys†
Prerequisites:
• Refer to the
Key Variable Loader (KVL) manual
for equipment connections and setup.
Procedure:
1
Attach the KVL to your radio.
All other radio functions, except for power down, backlight, and volume, are locked out.
2
Select the required keys and press
Load
on the KVL.
The KVL indicates that keyload is successful.
7.11.3.2
Multikey Feature
This feature allows the radio to be equipped with different encryption keys and supports the DES-OFB
algorithm.
There are two types of encryption keys:
Conventional Multikey
The encryption keys are strapped on a one-per-channel basis, through CPS. If talkgroups are
enabled in conventional, then the encryption keys are strapped to the talkgroups.
Trunked Multikey
If both conventional and trunked applications are applied, strap the encryption keys for trunking
on a per-talkgroup, or announcement-group basis. Also, a different key can be strapped to other
features such as dynamic regrouping, failsoft, or emergency talkgroup.
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Chapter 7 : Advanced Features
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