Glossary

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.

A cable that carries several video channels between the facilities of a cable television company.

An LED in which incoherent light is emitted at all points along the pn junction.

A telecommunications outlet that is placed in front of the wall or pole.

A panel for electrical or data communications connections placed on a wall or pole.

A rapid rise in current or voltage, usually followed by a fall back to a normal level. Also referred to as a transient.

A device that contains a special electronic circuit that monitors the incoming voltage level and then trips a circuit breaker when an over-voltage reaches a certain level, called the over-voltage threshold.