214 lines
7.9 KiB
Plaintext
214 lines
7.9 KiB
Plaintext
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: I S D N Volume i :
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: ------- :
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:Integrated Services Digital Network :
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: From: :
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: Bell Atlantic - vol 2,number 3 :
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: Typed in by: :
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: Zandar Zan :
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Part 1:
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ISDN Glossary
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---- --------
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Analog - As used for a word or data transmission,a continuously varying
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electrical signal in the shape of a wave.
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Bit Stream - Refers to a continuous series of bits(binary digits) being
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transmitted on a transmission line.
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CCITT - The initials of the name in French of the International Telegraph and
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Telephone Con- sultative Committee.At CCITT representatives of tele-
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communications authorities, operators of public networks and other interested
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bodies meet to agree on standards needed for international in- terworking of
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telecommunica- tion services.
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Channel - (1) CCITT and ASA standard :A means of one-way transmis- sion.(2)
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Tariff and common usage:UCA path for electrical transmission between two or more
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points without common carrier-provided treminal equipment.Also called circuit,
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line,link,path or facility.
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CCSS - Common Channel Signalling System.A system whereby all sig- nalling for
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a number of voice paths is carried over one common channel,instead of within
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each individual channel.
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Data Communications - In telephone company terminology,data communi- cations
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refers to an end-to-end transmission of any kind of in- formation other than
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sound (including voice),or video.Data sources may be either digital (i.e., a
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computer) or analog (i.e., an elctrocardiogram transmitter).
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Data Rate - The rate at which a chan- nel carries data,measured in bits per
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second (bit/s),also know as "data signalling rate."
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Digital - A method to represent information be discrete or indi- vidually
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distinct signals,such as bits,as opposed to a continuously variable analog
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signal.
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Digital Transmission - A mode of transmission in which all infor- mation to be
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transmitted is first converted to digital form and then transmitted as a serial
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stream of pulses.Any signal - voice,data,television,can be converted to digital
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form.
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End-To-End Signalling - A mode of network operation in which the originating
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central office(or station) retains control and sig- nals directly to each
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successive central office(or PBX)as trunks are added to the connection.
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Facsimile - A system for the trans- mission of images.The image is scanned at
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the transmitter, reconstructed at the receiving station,and duplicated on some
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form of paper.
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High-Speed Data - A rate of data transfer ranging upward from 10,000 bits per
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second.
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ISDN - Integrated Services Digital Network.ISDN is a planned hierarchy of
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digital switching and transmission systems.Synch- ronized so that all digital
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elements speak the same "language" at the same speed,the ISDN would provide
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voice,data and video in a unified manner.
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LADT - Local Area Data Transport. LADT is a method by which customers will
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send and receive digital data over existing customer loop wiring.Dial-up LADT
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will let customers use their lines for occasional data services;direct access
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LADT will transmit simultaneous voice and data traffic on the same lines.
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Signalling - The process by which a caller or equipment on the transmitting
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end of a line in- forms a particular party or equipment at the receiving end
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that a message is to be communicated.Signalling is also the supervisory
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information which lets the caller know the called party is ready to talk, the
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line is busy,or the called party has hung up.
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Terminal - (1) A point at whcih information can enter or leave a communication
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network.(2) Any device capable of sending and/or receiving information over a
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communication channel.The means by which data are entered into a computer system
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and by which the decisions of the system are communicated to the environment it
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affects.
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Videotext - Generic term for a class of two-way,interactive data distribution
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systems with output typically handled as in teletext systems and input typically
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accepted through the telephone or public data network.
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=======================================
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Note: I have ommitted some of the text originally in this glossary because it
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was quite common knowledge and needed no repition in this file. the text was:
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Architecture
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Data
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Facility
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Switch
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Transmission
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Get the point?
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This glossary is for the ISDN network and is a list of terms used within the
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explantion and function of this system.
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That's about all for this one....look for volumes ii and iii...
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Some text was rearranged slightly to faclitate the writing of this file.
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=======================================
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The Neon Knights
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=======================================
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201-879-6668 pw:kill 300/1200
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503-538-0761 300/10 megs
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201-528-6467 pw:zandar
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=======================================
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::::::::::::::::::::::::::::::::::::::
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: :
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: :
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: I S D N Volume ii :
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: ------- :
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: :
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: Integrated Services Digital Network:
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: :
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: From: :
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: :
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: Bell Atlantic - vol. 2,number 3 :
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: :
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: Typed in by: :
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: :
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: Zandar Zan :
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: :
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::::::::::::::::::::::::::::::::::::::
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Part 2:
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-------
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Bell Atlantic helps light the fuse to an explosive new technology
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I have merely sumarised this article into the basic facts about ISDN.
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In addition to instant facsimile transmission and video-conferencing, ISDN
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features include:
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-- centralized coordination and administration of Centrex phones within large
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companies;
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-- city-wide Centrex,allowing inter- building dialing of four-digit numbers
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without a prefix;
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-- reproduction by printer of onscreen images.
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Besides implementing an aggressive digital modernization program in key
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central offices throughout the region (221 COs will be digital by the end of the
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year,compared to 459 in 1986),the company has introduced two product lines that
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position ISDN in the mid-At lantic region: LADT(local area data transport) and
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CO-LANs(central office- based local area network).
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(LADT provides a LATA-wide public packet switching service,while CO-LAN
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provides a switched terminal-to termi- nal or terminal-to-host data
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communications service.Both services use a "data voice multiplexer"(DVM), which
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squeezes more out of the transmission medium and allows a customer to trasmit
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voice and data simultaneously to more than one re- ceiver over the existing
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telephone wire.)
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ISDN will help customers transmit high-speed facsimile and voice signals
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and,at the same time,receive calls and data.
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ISDN advances are confined to the U.S. shores,however.
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Trials are scheduled to get underway in Japan,Great Britain,France,West
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Germany,Italy and Sweden.(In Japan, ISDN is known as INS,or Information Network
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System,and in Great Britain, it's called IDA,or Integrated Digital Access.)
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get this line guys,true american bureaucratic bullshit and redtape that
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regulates fucking everything....
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"The movement to migrate to an ISDN network overseas is - for a variety of
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regulatory and political reasons - outpacing efforts in the u.s."
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In otherwords,cause of the fucking bureaucrats in office,the fucking japs and
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shit are moving faster than we are even in the phone systems now cause we have
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to many 'regulatory and political' bullshit laws...
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that's all dudes
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Zandar Zan
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=======================================
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The Neon Knights
|
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=======================================
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201-879-6668 pw:kill 300/1200
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=======================================
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Call The Works BBS - 1600+ Textfiles! - [914]/238-8195 - 300/1200 - Always Open
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