Requesting An Over-The-Air Rekey (Astro Only); Mdc Over-The-Air Rekeying (Otar) Page - Motorola ASTRO APX 4000 Model 2 User Manual

Requesting an Over-the-Air Rekey (ASTRO Only)

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.
Procedure:
1 < >
or to Reky.
2
Press the Menu Select button directly below Reky.
3
Press the PTT button to send the rekey request.
OR
Press the PTT button again, or the Home or Emergency
button, to exit the feature and transmit in normal mode.
4
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). This
key must be 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.
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English

MDC Over-the-Air Rekeying (OTAR) Page

This feature allows 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 Delayed Acknowledgements, and Power-
up Acknowledgements.
Some of the options selected may also need to be set up at the
Key Management Controller (KMC) site to work properly.
Note: This feature must be preprogrammed by a qualified
radio technician. Check with your dealer or system
administrator for more information.