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