Motorola APX 8000 2 User Manual page 106

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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when all of the encryption keys is erased. Without this
UKEK key, the radio could not be over the air
rekeyed.
Note
This feature must be preprogrammed by a
qualified radio technician. Check with your
dealer or system administrator for more
information.
Hear Clear
Note
This feature must be preprogrammed by a
qualified radio technician. Check with your
dealer or system administrator for more
information.
There are two components of Hear Clear.
Companding Reduces the channel noise, e.g.
OTA transmission, that is
predominantly present in UHF2 and
900 MHz channel with the following
features.
Compressor Reduces the
background noise
flow and the speech