The application performs the following actions:
• Generation of Key Stream Segments (KSS)
• Synchronization for E2EE
• TETRA authentication algorithm based on K key on the SIM
• Key management for E2EE keys
• SIM interface encryption and authentication using the AES
The filing system holds the following items:
• Network access parameters as Individual Tetra Subscriber Identity (ITSI)
• Security class definition and authentication definition
• Integrated circuit card identifier
• SIM version number
• OPTA
The E2EE keys are also kept on the SIM. However, they are accessible for the SIM application only,
thus E2EE key management is transparent to the radio.
The keys for AIE remain on the radio. The SIM application handles AIE key management.
2.8.7
Radio Disable or Enable
A dispatcher can disable or enable the radio remotely.
When disabled, the radio does not participate in any Short Data Service (SDS) activity and ignores all
supplementary services sent on the down link. All visible and audible indications are disabled, and the
radio appears to be turned off. All user inputs, such as key presses, are ignored, and the PEI interface
is closed.
The radio continues to perform mobility management functions, such as roaming, to facilitate
subsequent enabling or further disabling.
The radio stores the disabled or enabled state in the codeplug, so the unit remains in that state after
turning on.
If the radio is in the disabled state, and receives an appropriate TETRA signaling for subscription
enablement with the correct Short Subscriber Identity (SSI) and Mobile Network Identity (MNI), it
restores to its normal operative state.
The TEI Query feature provides TEI information to the infrastructure during registration. This allows the
dispatcher to disable radio by sending an appropriate TETRA signaling for equipment disable with the
correct TEI for this radio. Replacing the SIM card does not activate the radio. TEI Query feature is only
available on GMOI network.
If the radio is in the equipment disabled state, and receives an appropriate TETRA signaling with the
correct TEI, the radio restores to its normal operative state (if the subscription is also in the enabled
state).
2.8.8
Radio Permanent Disable
NOTE:
This is a Software Selling Feature.
MN003465A01-AF
Chapter 2 : Services and Features
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