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
This article incorporates public domain material from the General Services Administration document: "Federal Standard 1037C". (in support of MIL-STD-188)
- National Information Systems Security Glossary