Motorola APX 8000 User Manual page 67

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.
Requesting an Over-the-Air Rekey (ASTRO
Conventional Only)
Ensure that the 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.
This feature, also known as OTAR, allows the
dispatcher to reprogram the encryption keys in the
radio remotely. The dispatcher performs the rekey
operation upon receiving a rekey request from the
user.
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 Unique
Shadow Key (USK).
MDC Over-the-Air Rekeying (OTAR) Page
This feature allows you to view or define MDC Over-
the-Air Rekeying (OTAR) features. It is applied only
when operating in secure encrypted mode and only
for conventional communications. In additional to
Rekey Requests, OTAR transmissions include
Delayed Acknowledgements, and Power-up
Acknowledgements.
Some of the options selected may also need to be set
up at the Key Management Controller (KMC) site to
work properly.
Note
This feature must be preprogrammed by a
qualified radio technician. Check with your
dealer or system administrator for more
information.
Infinite UKEK Retention
This feature enables Unique Key Encryption Key
(UKEK) to be permanently stored in the radio even
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English