Mdc Over-The-Air Rekeying Page; Infinite Ukek Retention; Hear Clear - Motorola APX 8000H 2.5 User Manual

NOTICE:
The rekey operation failure indicates that
your radio does not contain the USK.

MDC Over-the-Air Rekeying 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.
NOTICE:
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 when all the
encryption keys are erased. Without this UKEK key, the
radio cannot be rekeyed over the air.
NOTICE:
This feature must be preprogrammed by a qualified
radio technician. Check with your dealer or system
administrator for more information.

Hear Clear

NOTICE:
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, such as 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
signal at transmitting radio.
Expander
Expands the speech while the noise flow remains the
same at receiving radio.
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