Cabling Glossary

Glossary Term Description
Attenuation

Attenuation is a loss of signal strength measured in decibels (db) sometimes referred to as insertion loss

Auto-Negotiation

A process to automatically adapt LAN devices operating with the same technology but different bit (autoneg) rates. Used by Ethernet and Token ring.

AWG

American Wire Gauge

Backbone Cabling

Subsystem cabling inter-linking equipment rooms and points of administration within and between buildings supporting the horizontal cabling subsystem

Bandwidth

Frequency range defining the throughput characteristics of the channel (measured in mhz)

BAS

Building Automation Systems

Baseband

A form of modulation in which data signals are coded directly onto the transmission medium without frequency division.

Baud

The number of signal transitions per second. Used for modems.

BD

Building Distributor

BER

Bit error rate. The ratio of received bits that are in error (relative to the amount of bits received); usually expressed as a number referenced to a power of 10, e.g. 1 error in 105 bits - also referred to as a BER 10-5.

BMS

Building management system

BREEAM

Building research establishment environmental assessment method

BS

British Standard

BS EN

British Standard European norm

CAC

Cold Aisle Containment (system)

CCTV

Closed Circuit Television

CD

Campus Distributor

CENELEC

Comité Européen de Normalisation Électrotechnique (European Standards Organisation).

COC

Centralized optical Cabling - The use of fibre cabling to provide direct connections from the outlet back to the Campus or Building Distributors

Collapsed Backbone

A star-configured backbone system supported by a single root device - often a high-speed switch.

Pages