1、NORME?CEIINTERNATIONALE?1ECINTERNATIONAL?50(721)STANDARDj/LTT.,Y1 premire dition 1?First edition1991-11Vocabulaire Electrotechnique InternationalChapitre 721:Tlgraphie,tlcopie etcommunication de donnesInternational ElectrotechnicalVocabularyChapter 721:Telegraphy,facsimile anddata communication 721:
2、,Vocabulario ElectrotcnicoInternacionalCapitulo 721:Telegrafa,facsmil ycomunicacin de datos1ECiNumro de rfrenceReference numberCEI/IEC 50(721):1991LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.LICENSED TO MECON Limited.-RANCHI/BANGAL
3、OREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.NORME?CEIINTERNATIONALE?1ECINTERNATIONAL?50(721)STANDARDMEYHAPOH/?/D?Premire dition1?First edition1991-00Vocabulaire ElectrotechniqueInternationalChapitre 721:Tlgraphie,tlcopie etcommunication de donnesInternational Electrotech
4、nicalVocabularyChapter 721:Telegraphy,facsimile anddata communication 721:,Vocabulario ElectrotcnicoInternacionalCaptulo 721:Telegrafa,facsmil y comunicacin de datos CEI 1991 Droits de reproduction rservs-Copyright-all rights reserved-Aucune partie de cette publication ne peut tre reproduite ni util
5、ise sous?No part of this publication may be reproduced or utilized in any form or by anyquelque forme que ce soit et par aucun procd,lectronique ou mcanique.y?means,electronic or mechanical,including photocopying and microfilm,compris la photocopie et les microfilms,sans laccord crit de Iitdinuur.?w
6、ithout permission in writing from the publisher.m u ee e WIN ,.Ninguna parte de esta publicacin se puede reproducik ni utilizar en cualquier forna ni cualquier procedimiento,electrnico o mecnico,incluidas Ian fotocopiasy las microfiches,sin permiso escrito del editor.Bureau central de la Commission
7、Electrotechnique Intemationale 3,rue de Varemb Genve Suisse1EC.Commission Electrotechnique InternationaleInternational Electrotechnical Commission?Code prix?(Price code?XG Pour pod,voir catalogue en vigueurfor price,see current catalogue LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT
8、 THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.II 50(721)C E ISOMMAIREPagesAVANT-PROPO5 VISections721-01 Formes de tlcommunications par signaux discrets 1721-02 Signaux temporels discrets et signaux numriques,lments de signaux 8721-0 Transmission par signaux temporels discrets ou numriques?17721
9、-04 Voies et mthodes de transmission 27721-05 Transmission par courant continu 37721-06 Transmission par courant porteur,multiplexage 40721-07 Qualit de transmission,distorsion temporelle 48721-08 Erreurs et protection contre les erreurs 59721-09 Codes et alphabets 77721-10 Commandes et signaux de f
10、onctions 86721-11 Voies et procds de transmission 100721-12 Appareils de tlgraphie et de transmission de donnes 118721-13 Appareils et services de tlcopie 136.721-14 Caractristiques de fonctionnement en tlcopie 140721-15 Dfauts et distorsion en tlcopie 158721-16 Rseaux tlgraphiques et de donnes 1637
11、21-17 Commutation tlgraphique et de donnes,signalisation 172721-18 Exploitation et services tlgraphiques 198721-19 Exploitation et services de donnes 218INDEX 229LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.50(721)I E C III CONTENTS
12、PageFOREWORD VIISection721-01 Forms of telecommunications using discrete signals 1721-02 Discretely-timed and digital signals,signal elements 8721-03 Transmission using discretely-timed or digital signals 17721-04 Transmission channels and methods 27721-05 Direct current transmission 37721-06 Carrie
13、r transmission,multiplexing 40721-07 Transmission performance,distortion in time 48721-08 Errors and error control 59721-09 Codes and alphabets 77721-10 Function controls and function signals 86721-11 Transmission channels and processes 100721-12 Telegraph and data transmission equipments 118721-13
14、Facsimile equipments and services 136721-14 Facsimile operational characteristics 140721-15 Defects and distortion in facsimile reproduction 158721-16 Telegraph and data networks 163721-17 Telegraph and data switching,signalling 172721-18 Telegraph operation and services 198721-19 Data transmission
15、operation and services 218INDEX 229LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IV-50(721)C E I.?VIII721-01?1721-02 ;?8721-c -?17721-04?27721-05?37721-06 ;-?40721-07 ;?48721-08?59721-09?77721-10?86721-11?100721-12?118721-13?136721-1
16、4?140721-15?158721-16?163721-17 ;?172721-18?198721-19?218?229LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.50(721)IECTABLA DE MATERIASPgs.PREAMBULO IXSecciones721-01 Formas de telecomunicacin por seales discretas 1721-02 Seales temporales discretas y seales digitales;elementos de seales 8721-03 Transmisin por seales temporales discretas o digitales 17721-04 Canales y mtodos de transmisin 27721-05 Transmisin por corriente continua
