Requesting An Over-The-Air Rekey; Mdc Over-The-Air Rekeying Page (Conventional Only); Infinite Ukek Retention; Hear Clear - Motorola APX MOBILE O9 User Manual

68007024014-GK
Advanced Features
2.11.3.6

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 Rekey.
2 Press the Menu Select button directly below Rekey.
3 Perform one of the following actions:
• Press the PTT button to send the rekey request.
• Press the PTT button again, or the
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.
2.11.3.7

MDC Over-the-Air Rekeying Page (Conventional Only)

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. 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. Check with your
dealer or system administrator for more information.
2.11.3.8

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.
NOTICE: This feature must be preprogrammed by a qualified radio technician. Check with your
dealer or system administrator for more information.
2.11.3.9

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.
90
or Emergency button, to exit the feature and transmit