Using The Multikey Feature; Selecting An Encryption Key - Motorola APX 7500 O5 User Manual

3 Select the required keys and press the Menu Select button
directly below LOAD on the KVL. This loads the encryption
keys into your radio.
4 When the key has been loaded successfully, the radio
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:
• Conventional Multikey – The encryption keys can be tied
(strapped), on a one-per-channel basis, through radio service
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.
• Trunked Multikey – If you use your radio for both
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:
< >
1 or to KEY.
2 Press the Menu Select button directly below KEY. The
display shows the last user-selected and stored encryption
key, and the available menu selections.
< >
3 or to scroll through the encryption keys.
OR
Use the keypad to enter the number of the desired key.
4 Press the Menu Select button directly below SEL to save 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.
Note: If the selected key is erased, a momentary keyfail tone
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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