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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.
7.14.3.3
Erasing Encryption Keys
Procedure:
•
Erasing the single key in radios with the single-key option and erasing all keys in radios with
the multikey option by using the preprogrammed Top Side (Select) button and Top (Orange)
button:
a. Press and hold the Top Side (Select) button.
b. While holding Top Side (Select) button down, press the Top (Orange) button.
The display shows PLS WAIT. When all the encryption keys have been erased, the display
shows ALL ERASED.
NOTE: Do not press the Top (Orange) button before pressing the Top Side (Select)
button, unless you are in an emergency situation as this sends an emergency alarm.
7.14.3.4
Requesting an Over-the-Air Rekey
Prerequisites: Ensure that the Unique Key Encryption Key (UKEK) or Unique Shadow Key (USK) is
loaded into the radio with the Key Variable Loader (KVL) before the rekey request can be sent. Refer
to your local key management supervisor for more information.
Procedure:
1 Press and hold the preprogrammed Rekey Request button to send the rekey request.
If the rekey operation fails, a bad-key tone sounds and the display shows RKY FAIL.
NOTE: The rekey operation failure indicates that your radio does not contain the UKEK
or USK.
7.14.3.5
MDC OTAR (Conventional Only)
This feature allows you to view or define the Motorola Data Communications (MDC) Over-the-Air
Rekeying (OTAR) features. This feature 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. For more information,
contact your system administrator.
MN006727A01-AF
Chapter 7 : Advanced Features
59
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