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Appendix B: Glossary

By Steven Shepard
From Metro Area Networking

Numbers

3G
Third-generation (3G) systems provide access to a wide range of telecommunication services supported by both fixed telecommunication networks and other services specific to mobile users. A range of mobile terminal types will be supported and may be designed for mobile or fixed use. Key features of 3G systems are the compatibility of services, small terminals with worldwide roaming capabilities, Internet access and other multimedia applications, high bandwidth, and a wide range of services and terminals.
4G
Fourth-generation (4G) networks extend 3G network capacity by an order of magnitude, rely entirely on a packet infrastructure, use network elements that are 100 percent digital, and offer extremely high bandwidth.

A

Abend
A contraction of the words abnormal end, used to describe a computer crash in the mainframe world.
Absorption
A form of optical attenuation in which optical energy is converted into an alternative form, often heat. Often caused by impurities in the fiber, hydroxyl absorption is the best known form.
Acceptance angle
The critical angle within which incident light is totally internally reflected inside the core of an optical fiber.
Access
The set of technologies used to reach the network by a user.
Add-Drop Multiplexer (ADM)
A device used in SONET and SDH systems that has the capability to add and remove signal components without having to demultiplex the entire transmitted transmission stream, a significant advantage over legacy multiplexing systems such as DS3.
Aerial plant
Transmission equipment (including media, amplifiers, splice...
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Products & Services
3G, UMTS, and EDGE Chips
Third generation (3G) cellular communication chips include UMTS and EDGE chips. Universal mobile telecommunication system (UMTS) chips provide high-speed data access. Enhanced data rates for GSM evolution (EDGE) chips make GSM implementation easier.
Network and Communication Chips
Network and communication chips are semiconductor integrated circuits (IC) used in telecommunication devices and systems.
Video Conferencing Equipment
Video conferencing equipment enables meeting participants at different locations to communicate via two-way video with simultaneous audio transmissions.
IC Interfaces
IC interfaces are semiconductor chips that are used to control and manage the sharing of information between devices.
Optical Add/Drop Multiplexers
Optical Add/Drop Multiplexers (OADMs) are used in wavelength-division multiplexing systems for multiplexing and routing fiber optic signals.
Topics of Interest

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