User's Guide

Table Of Contents

system administrator. Erasing all keys using the Top (Orange) button and the Top Side (Select) button

erases all keys in all keylists in the radio.

Procedure:

• Erasing the selected encryption keys using the radio menu:

a. or to Eras and press the Menu Select button directly below Eras.

The display shows the last user-selected and stored encryption key, and the available menu

selections.

or to the desired encryption key or use the keypad to enter the number of the desired

key.

c. Press the Menu Select button directly below All to delete all keys, or press the Menu

Select button directly below Sngl to delete the current shown key.

You can abort this screen and return to the Home screen by pressing the Menu Select

button directly below Abrt.

6.12.3.6

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:

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.

6.12.3.7

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.

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Chapter 6: Advanced Features