June 11, 2003 6881096C73-O
7-8 Encryption: Over-the-Air Rekeying
7.7.1 W3 Control Head
1. Press > until REKY appears.
2. Press
m below REKY.
REQUEST REKY is displayed.
3. Press the PTT button to send the rekey request.
PLEASE WAIT is displayed.
One of the following occurs:
The radio sounds five tones when the dispatcher has
received the request.
NOTE: Any subsequent pressing of the PTT button will exit the feature and allow
you to transmit in the normal manner. Pressing
O or the emergency button
also exits the feature.
If the display momentarily shows
REKEY FAIL and a
bad-key tone sounds, the rekey operation failed
because the radio does not contain the Unique
Shadow Key (USK) or Unique Key Encryption Key
(UKEK).
You have to load the USK into the radio using the
KVL before the radio can be reprogrammed over the
air.
NOTE: If you exit at this point, but stay on the current channel in the dispatch mode,
the radio momentarily shows
REKEYED or DENIED and sounds a tone
indicating the status of the rekey request.
If the display shows
NO ACK and a bad-key tone
sounds, then the dispatcher has not acknowledged
your request after the radio has tried five times to
send it.
The radio then returns to the display message in step
2, allowing you to retry the request.
If the request is accepted and the radio is
successfully rekeyed, the display momentarily shows
REKEYED.
If the display momentarily shows
DENIED and a bad-
key tone sounds, the request has been denied by the
dispatcher, and the radio returns to the home display.
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