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Seminar - An Overview of Communications Technologies


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Module 2 - Data Communications Basics and Legacy Technologies                                                Slide 45 of 45  _________________                                                                                  __________

Glossary

ADSL - Asynchronous Digital Subscriber Line - A method of sending 1.544 M bps data over copper pairs.

ANSI - The American National Standards Institute is a national clearing house and co-ordinating agency for standards implemented in the United States. It is a member of the International Organization for Standards (ISO) and develops and co-ordinates standards in data communications for the OSI.

ATM - Asynchronous transfer Mode - A very high speed, full-duplex, fixed-length 48 byte cell switching scheme for voice, data and video.

CA*NET 4 - CA*NET is a Canadian Internet network owned by CA*net Networking Inc. CA*net was established in 1989 and was initially managed by the University of Toronto Computing Services Department. The network has gone through many upgrades: CA*Net II, CA*NET III and now CA*NET 4, a high speed network with giga bps switching hubs with the capacity to route traffic at gig bps speeds. 

CCS #7 - A Common Control Signaling scheme used in the ISDN and the Public Switched Telephone Network.

EIA - The Electronic Industries Association is a national trade association which develops standards. Best known for RS-232 standards.

FDM - A Frequency Division Multiplexer is a device which divides the available transmission frequency range into narrower bands. Each narrow band is a separate channel for the information transmission.

IEEE - The Institute of Electrical and Electronics Engineers, involved in developing standards for many years. It is well known for the LAN and wireless (802.11 a, b and g) standards.

TDM - A Time Division Multiplexer is a device which derives multiple channels on a single transmission line by connecting terminals one at a time at regular intervals.

WDM - Wave Division Multiplexing is the technique used to send several channels at different wavelengths through the same optical fiber. 

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