Motorola ST7500 - 4.11.3.1 Viewing Air Encryption State; 4.11.3.2 Deleting User Keys; 4.11.4 K Validity; 4.11.4.1 Verifying K Validity

In the TMO Mode, when Air Encryption is enabled on your radio but cannot be supported due to an
infrastructure failure, the following icon appears on the display: . When encryption is not available in
the DMO Mode, the radio displays: .
4.11.3.1
Viewing Air Encryption State
Procedure:
1 From the home screen, press the Menu key.
2 From the home screen, press the Menu/OK key.
3 Select Security→AirEncrypt.
Your radio displays:
• Air Encryption Is Off – The Air Encryption is not activated.
• Air Encryption Is On – The Air Encryption is activated.
4.11.3.2
Deleting User Keys
IMPORTANT: The key deletion takes up to 30 seconds. During this period, the battery must not
be removed. Removing the battery during this period may lead to radio malfunction.
Prerequisites:Ensure that the user key deletion is enabled in the codeplug.
Procedure:
1 Press *→*→0→0→#→#.
2 Press OK→Power→Power→Down→Down→Power→Power→Up→Up.
Encryption and/or Authentication keys are deleted. The radio enters Temporary Disable state and the
service provider must manually restore it.
4.11.4
K Validity
Key (K) is a secret key the infrastructure uses to authenticate the radio in the system. It is part of the
authentication that provides service confidentiality between your radio and the system.
4.11.4.1
Verifying K Validity
Procedure:
1 From the home screen, press the Menu key.
2 From the home screen, press the Menu/OK key.
3 Select Security→K Validity.
Your radio displays:
• K is Valid – The infrastructure can authenticate your radio.
MN004519A01-AK
Chapter 4: Main Menu
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