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
102