Radio Permanent Disable; Radio Permanent Disable V2 - Motorola MTP830 S Product Information Manual

46 | Services and Features
If the radio is in the disabled state, and receives an appropriate TETRA signaling for subscription enablement with the
correct SSI and MNI, it restores to its normal operative state.
The TEI Query feature provides TEI information to the infrastructure during registration. This allows to disable the
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.
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).

Radio Permanent Disable

Permanent disabling is intended to protect a network from attack from a compromised or faulty radio. It can be used
when the radio has been compromised, or has been suspected of compromise for a long time. It is a one-way function
and no equivalent enable is available. Then the radio should be recovered and reprogrammed before being used again
by the service provider.
When the radio is permanently disabled, it becomes inoperable.
• All its MMI interfaces on the radio are disabled.
• All its security key material, that is GCK, GSKO, DMO SCKs, Ks, DCK, CCK, TMO SCKs are deleted.
• All its codeplug is deleted.
• All its software is deleted.
The permanent disable should be invoked when it has been determined that a radio is unrecoverable. When a radio
has been lost or stolen, the first step always is to stun the radio (using the temporary disable).
The permanent disable should be used with the deletion of the user radio record in the User Configuration Server and
the deletion of the K-REF association of the disabled radio in the Provisioning Centre and the Authentication Centre.
This deletion ensures that subscriber information is not downloaded into the Home Location Register if a restore of
the UCS is performed.
The system operator has to also ensure that the radio K-REF association is also removed from the other
Authentication Centres in the network, in cases where the K-REF pairs are duplicated across the network.
If this association is not removed, the radio could be assigned a new home zone that lies in a cluster where the K-REF
association has not been deleted.
Radio Permanent Disable and Radio Permanent Disable v2 are mutually exclusive selling features.

Radio Permanent Disable v2

Similarly to the permanent disable, once the radio is disabled using the permanent disable v2, it cannot be recovered
over the air. When the radio accepts the permanent disable command, and if the permanent disable v2 flag is enabled
in the codeplug, the radio appears to be inoperable.
• All its MMI interfaces on the radio appear to be disabled.
• All its security key material; GCK, GSKO, DMO SCKs, Ks, DCK, CCK, TMO SCKs, and End-to-End key
material are deleted.
• The radio automatically turns off on powering attempts without any audible/visible indications to the end users.
• The permanent disable flag is set in the codeplug.
Unlike in the permanent disable, a permanent disabled v2 radio can be re-enabled using the software selling dongle. If
you have the software selling dongle, you can read the codeplug and clear the permanent disable flag.
Note: When a radio has been disabled using the permanent disable v2, entering programming mode
procedure is different. For the details, see TETRA Terminals CPS Start-up User Guide (Motorola Part
Number: 6802974C10).
Radio Permanent Disable and Radio Permanent Disable v2 are mutually exclusive selling features.
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