Motorola ASTRO APX O5 User Manual page 104

The display shows the last user-selected and
stored encryption key, and the available menu
selections.
b)
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
current shown key.
You can abort this screen and return to Home
screen by pressing the Menu Select button
directly below ABRT.
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.
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English
1
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
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.
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
or