1. See also

2. References

Clearing, in telecommunications means:

• A sequence of events used to disconnect a call and return to the ready state. It is sometimes, particularly in the context of common-channel signaling, called teardown.
• Removal of data from an AIS, its storage devices, and other peripheral devices with storage capacity, in such a way that the data may not be reconstructed using normal system capabilities (i.e., through the keyboard).

Note: An AIS need not be disconnected from any external network before clearing takes place. Clearing enables a product to be reused within, but not outside of, a secure facility. It does not produce a declassified product by itself, but may be the first step in the declassification process.

See also

• Disengagement originator
• Clearing (disambiguation)

References

• National Information Systems Security Glossary

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