Using The Multikey Feature; Selecting An Encryption Key - Motorola ASTRO APX 7500 Series Quick Reference Card

Press the Menu Select button below Load to load the key
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to your radio.
When the key has been loaded successfully, the radio
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sounds a short tone for single-key radios.
OR
When the key has been loaded successfully, the radio
sounds an alternating tone for multikey radios.

Using the Multikey Feature

This feature allows the radio to be equipped with as many as 48
different encryption keys and supports the DES-OFB algorithm.
There are two types:
– The encryption keys can be tied
•
Conventional Multikey
(strapped), on a one-per-channel basis, through Customer
Programming Software. In addition, you can have operator-
selectable keys, operator-selectable keysets, and operator-
selectable key erasure. If talkgroups are enabled in
conventional, then the encryption keys are strapped to the
talkgroups.
– If you use your radio for both
•
Trunked Multikey
conventional and trunked applications, you have to strap your
encryption keys for trunking on a per-talkgroup or
announcement-group basis. In addition, you may strap a
different key to other features, such as dynamic regrouping,
failsoft, or emergency talkgroup. You can have operator-
selectable key erasure.

Selecting an Encryption Key

Procedure:
< >
or to Key.
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Press the Menu Select button directly below Key. The
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display shows the last user-selected and stored encryption
key, and the available menu selections.
U D
or to scroll through the encryption keys.
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OR
Use the keypad to enter the number of the desired key.
Press the Menu Select button directly below Select to save
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the newly selected key and return to the Home screen.
OR
H
Press , the PTT button, or the Menu Select button directly
below Exit to exit.
If the selected key is erased, a momentary keyfail tone
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sounds and the display shows Key fail.
OR
If the selected key is not allowed, a momentary illegal key
tone sounds and the display shows Illegal key.
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English