Radio Permanent Disable; Radio Permanent Disable V2 - Motorola ST7000 Product Information Manual

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).
2.11.4

Radio Permanent Disable

Radio Permanent Disable and Radio Permanent Disable v2 are paid features that are mutually
exclusive.
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 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 Center and the Authentication Center. 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 Centers 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.
2.11.5

Radio Permanent Disable v2

Radio Permanent Disable and Radio Permanent Disable v2 are paid features that are mutually
exclusive.
Similar to 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 that is GCK, GSKO, DMO SCKs, Ks, DCK, CCK, TMO SCKs, and End-
to-End key material are deleted.
• The radio automatically enters programming mode upon powering attempts.
• 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.
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Chapter 2: Services and Features
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