a technique used to satisfy the ones density requirements of digital T-carrier facilities in the public network while allowing 64 Kbps clear channel data. Strings of eight consecut [..]

The main connectivity device of a distributed system. All systems that have connectivity to the backbone connect to each other. This does not stop systems from setting up [..]

The total system noise in the absence of information transmission, independent of the presence or absence of a signal.

High-speed communications line to which individual components are connected. In multi-plane fabric switches, the backplane allows for inter-fabric connections and timing [..]

Usually identifies the capacity or amount of data that can be sent through a given circuit; may be user-specified in a PVC. Bar Code

Dilute sulfuric acid used as electrolyte in a lead/acid storage battery/accumulator.

A battery which provides power to equipment during the absence of commercial AC. Battery Capacitance

A device which has a rectifier and a filter. This device will convert AC power into the correct DC voltages necessary to drive a telephone system. Such a battery eliminator or powe [..]

Unit of signaling speed. The speed in baud is the number of discrete conditions or signal events per second. If each signal event represents only one bit, the baud rate i [..]

Information in the SETUP message that indicates the type of service requested by the calling user. BCOB-A (Bearer Class A)