Chapter 13
Secure Operations
Secure radio operation provides the highest commercially available level of voice security on both
trunked and conventional channels.
By default, the radio automatically enters the encrypted environment without having to manually select
or clear the secure transmission.
13.1
Toggling Between Secure and Clear Transmission
Procedure:
Turn the
Secure/Clear
switch to the required position.
If the Secure/Clear selection differs from the security settings of the channel when you attempt
to transmit, the
Radio Control Widget
shows
Secure Tx Only
or
Clear Tx Only
.
13.2
Multikey Feature
This feature allows the radio to be equipped with different encryption keys.
There are two types of encryption keys:
Conventional Multikey
The encryption keys are strapped on a one-per-channel basis, through CPS. In addition, you can
have operator-selectable keys, operator-selectable keysets, and operator-selectable key erasure. 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. You can have operator-
selectable key erasure.
13.3
MDC OTAR (Conventional Only)
This feature allows you to view or define the Motorola Data Communications (MDC) Over-the-
Air Rekeying (OTAR) features. It is applied only when operating in secure encrypted mode. In
addition to Rekey Requests, OTAR transmissions include Delayed Acknowledgments, and Power-up
Acknowledgments.
Some of the selected options require configuration at the Key Management Controller (KMC) site to
work properly.
NOTE:
This feature must be programmed by a qualified radio technician.
MN009207A01-AA
Chapter 13 : Secure Operations
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