b. While holding
Top Side (Select)
button down, press the
Top (Orange)
button.
The display shows
Please wait
. When all the encryption keys have been erased, the
display shows
All keys erased
.
NOTICE:
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.
6.14.3.6
Requesting an Over-the-Air Rekey
If the Multi-system Over-the-Air Rekeying feature is in use, the rekey request is only for the current
selected secure profile.
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
or to
Reky
.
2
Press the
Menu Select
button directly below
Reky
.
3
Perform one of the following actions:
• Press the
PTT
button to send the rekey request.
• Press the
PTT
button again, or the
or
Emergency
button, to exit the feature and transmit
in normal mode.
If the rekey operation fails, you hear a bad-key tone and the display shows
Rekey fail
.
NOTICE:
The rekey operation failure indicates that your radio does not contain the UKEK
or USK.
6.14.3.7
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.
NOTICE:
This feature must be preprogrammed by a qualified radio technician. Contact your
system administrator for more information.
6.14.3.8
Infinite UKEK Retention
This feature enables Unique Key Encryption Key (UKEK) to be permanently stored in the radio even
when all the encryption keys are erased. Without this UKEK key, the radio cannot be rekeyed over the
air. The Infinite UKEK Retention settings can be different for each secure profile.
MN004476A01-AE
Chapter 6: Advanced Features
88
