home *** CD-ROM | disk | FTP | other *** search
-
- ::::::::::::::::::::::::::::::::::::::
- : :
- : 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
- =======================================