Motorola APX 4000 User Manual page 106

• Erasing the selected encryption keys via 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.
b) or
c) Press the Menu Select button directly below
Optn.
The display shows the available key erase
options.
d) or
Menu Select button directly below Sel.
e) Select Erase all keys? or Erase single
key? by pressing the Menu Select button
below Yes to erase the encryption key(s) in the
radio.
You can return to the previous screen by
pressing the Menu Select button below No.
• Erasing the single key in radios with the single-key
option and erasing all keys in radios with the
multikey option via the preprogrammed Top Side
(Select) button and Top (Orange) button:
102
English
to the desired encryption key.
to the required option and press the
a) Press and hold the Top Side (Select) button.
b) While holding Top Side (Select) button down,
press the Top (Orange) button.
The display shows Please wait. When all the
encryption keys have been erased, the display
shows All keys erased.
Note: Do not press the Top (Orange) button
before pressing the Top Side (Select) button,
unless you are in an emergency situation as
this sends an emergency alarm.
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.
1
or to Reky.