Glossary

The process in which a photon interacting with an electron triggers the emission of a second photon with the same phase and direction as the first. Stimulated emission is the basis of a laser.

The process of terminating multiconductor cables on a punch-down block such as a 66-block or 110-block.

A type of twisted-pair cable in which the pairs are enclosed in an outer braided shield, although individual pairs may also be shielded. STP most often refers to the 150 ohm IBM Type 1, 2, 6, 8, and 9 cables used with Token Ring networks. Unlike UTP cabling, the pairs in STP cable have an individual shield, and the individual shielded cables are wrapped in an overall shield. The primary advantages of STP cable are that it has less attenuation at higher frequencies and is less susceptible to EMI. Since the advent of standards-based structured wiring, STP cable is rarely used in the United States.

Refers to the enhanced IBM Cabling System specifications with the Type A suffix. The enhanced Type 1A, 2A, 6A, and 9A cable specifications were designed to support operation of 100Mbps FDDI signals over copper. See Type 1A, Type 2A, Type 6A, or Type 9A.

Refers to a connector that is configured inline rather than right angled.

Straight-through—Refers to a cable assembly where the pin out (connections) are the same at both ends of the lead.
I.e Pin 1 to Pin 1
Pin 2 to Pin 2 and so on

Cable who’s conductor is made up of multiple strands of copper

The part of a fiber-optic cable composed of Kevlar aramid yarn, steel strands, or fiberglass filaments that increases the tensile strength of the cable.

Telecommunications cabling that is organized into a hierarchy of wiring termination and interconnection structures. The concept of structured wiring is used in the common standards from the TIA and EIA. See Chapter 1 for more information on structured cabling and Chapter 2 for more information on structured cabling standards.

A type of frame used in building construction.

A frequency range covering a single UK operator’s frequency allocation for given technology 900 / 1800 / 2100. Operators Sub Band

A cable designed to be laid underwater.

The subminiature D-connector is a family of multipin data connectors available in 9-, 15-, 25- and 37-pin configurations. Sometimes referred to as DB9, DB15, DB25, and DB37 connectors, respectively.

Subnet masks consist of 32 bits, usually a block of 1s followed by a block of 0s. The last block of 0s designate that part as being the host identifier. This allows a classful network to be broken down into subnets.

A network that is part of another network. The connection is made through a router.