A series of significant conditions determined by the decisions taken according to the products of the demodulation process.

The bound on performance that is allowed when corrective action is taken to restore a parameter after an IAL (immediate action limit) failure. Performance as measured by a parameter is satisfactory if the value of the parameter is equal to or better than the limit. [T1.506-1989]

Of an impaired (degraded) or unserviceable telecommunications service or facility, action taken to repair it and return it to service.
Note: Permanent or temporary restoration may be accomplished by various means, such as patching, rerouting, substitution of component parts, etc.

Describes supremacy given to some Government and National Security circuits.

A class of service in which users may be denied access to one or more of the system features or operating levels.

Synonym controlled space.

In digital communications systems, a channel that has a useful capacity of only 56 kb/s (kilobits per second), instead of 64 kb/s.
Note: The restricted channel, currently common in North America, was originally developed to satisfy a ones-density limitation in T1 circuits.

In secure systems, an authorization certificate that indicates the security restrictions on documents and transactions that an entity may authorize. [After X9.45]

Storage in the signaling link control for signal units that have been transmitted but not yet positively acknowledged. [T1.226-1992]

In interactive telecommunications, a service allowing access to and retrieval of stored information, e.g., the information within a database.