Abbreviation for intermodulation distortion.

See communications deception.

The bound on performance allowed for a circuit or connection that is in service. When any parameter value exceeds the IAL, the circuit or connection is considered defective and corrective action is necessary. [T1-506-1989]

In cryptology, a condition of readiness associated with a key having no effective date.
Note: A key is immediately activated (a) by the receiver when the RSM is sent in response to the KSM that carried that key, and (b) by the sender when the RSM is received in response to the KSM that carried the key. [After X9.17]

A category of precedence reserved for messages relating to situations that gravely affect the security of national/allied forces or populace and that require immediate delivery to the addressee(s). [JP 1-02]

The ability of an assembly, equipment, or a system to perform without degradation in the presence of an electromagnetic disturbance. [T1.308-1996]

Abbreviation for interface message processor.

Is where an individual circuit exceeds the transmission limits or where the quality of service is diminished. A circuit is also impaired if its signaling functions (e.g., seizure, disconnect, ANI) is experiencing intermittent failures.

The total passive opposition offered to the flow of electric current.
Note 1: Impedance is determined by the particular combination of resistance, inductive reactance, and capacitive reactance in a given circuit.
Note 2: Impedance is a function of frequency, except in the case of purely resistive networks.

The connection of an additional impedance to an existing one in order to accomplish a specific effect, such as to balance a circuit or to reduce reflection in a transmission line.