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(ITU) ﻟﻼﺗﺼﺎﻻﺕ ﺍﻟﺪﻭﻟﻲ ﺍﻻﺗﺤﺎﺩ ﻓﻲ ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﺃﺟﺮﺍﻩ ﺍﻟﻀﻮﺋﻲ ﺑﺎﻟﻤﺴﺢ ﺗﺼﻮﻳﺮ ﻧﺘﺎﺝ (PDF) ﺍﻹﻟﻜﺘﺮﻭﻧﻴﺔ ﺍﻟﻨﺴﺨﺔ ﻫﺬﻩ .ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﻓﻲ ﺍﻟﻤﺘﻮﻓﺮﺓ ﺍﻟﻮﺛﺎﺋﻖ ﺿﻤﻦ ﺃﺻﻠﻴﺔ ﻭﺭﻗﻴﺔ ﻭﺛﻴﻘﺔ ﻣﻦ ﻧﻘﻼ ً◌ 此电子版（PDF版本）由国际电信联盟（ITU）图书馆和档案室利用存于该处的纸质文件扫描提供。 Настоящий электронный вариант (PDF) был подготовлен в библиотечно-архивной службе Международного союза электросвязи путем сканирования исходного документа в бумажной форме из библиотечно-архивной службы МСЭ. © International Telecommunication Union INTERNATIONAL TELECOMMUNICATION UNION CCITT THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE YELLOW BOOK VOLUME VIII - FASCICLE Vlll/I DATA COMMUNICATION OVER THE TELEPHONE NETWORK RECOMMENDATIONS OF THE V SERIES VIIth PLENARY ASSEMBLY GENEVA, 10-21 NOVEMBER 1980 Geneva 1981 INTERNATIONAL TELECOMMUNICATION UNION CCITT THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE YELLOW BOOK VOLUME VIII - FASCICLE VIII.1 DATA COMMUNICATION OVER THE TELEPHONE NETWORK RECOMMENDATIONS OF THE V SERIES VIIth PLENARY ASSEMBLY GENEVA. 10-21 NOVEMBER 1980 Geneva 1981 ISBN 92-61-01151-9 © I.T.U. CONTENTS OF THE CCITT BOOK APPLICABLE AFTER THE SEVENTH PLENARY ASSEMBLY (1980) YELLOW BOOK Volume I Minutes and reports of the Plenary Assembly. Opinions and Resolutions. Recommendations on: - the organization and working procedures of the CCITT (Series A); - means of expression (Series B); - general telecommunication statistics (Series C). List of Study Groups and Questions under study. Volume II FASCICLE II. 1 General tariff principles - Charging and accounting in international telecommunications services. Serie D Recommendations (Study Group III). FASCICLE II.2 International telephone service - Operation. Recommendation E.100 - E.323 (Study Group II). FASCICLE II,3 International telephone service - Network management - Traffic engineering. Recommenda­ tions E.401 - E.543 (Study Group II). FASCICLE II.4 Telegraph and “telematic services”1) operations and tariffs. Series F Recommendations (Study Group I). Volume III FASCICLE III.l General characteristics of international telephone connections and circuits. Recommendations G.101 - G.171 (Study Group XV, XVI, CMBD). FASCICLE III.2 International analogue carrier systems. Transmission media - characteristics. Recommenda­ tions G.211 - G.651 (Study Group XV, CMBD). FASCICLE III.3 Digital networks - transmission systems and multiplexing equipments. Recommendations G.701 - G 941 (Study Group XVIII). FASCICLE III.4 Line transmission of non telephone signals. Transmission of sound programme and television signals. Series H, J Recommendations (Study Group XV). Volume IV FASCICLE IV. 1 Maintenance; general principles, international carrier systems, international telephone circuits. Recommendations M.10 - M.761 (Study Group IV). FASCICLE IV.2 Maintenance; international voice frequency telegraphy and facsimile, international leased circuits. Recommendations M.800 - M.1235 (Study Group IV). FASCICLE IV.3 Maintenance; international sound programme and television transmission circuits. Series N Recommendations (Study Group IV). FASCICLE IV.4 Specifications of measuring equipment. Series O Recommendations (Study Group IV). “Telematic services” is used provisionally. Volume V - Telephone transmission quality. Series P Recommendations (Study Group XII). Volume VI FASCICLE VI. 1 General Recommendations on telephone switching and signalling. Interface with the maritime service. Recommendations Q.l - Q. 118 bis (Study Group XI). FASCICLE VI.2 Specifications of signalling systems Nos. 4 and 5. Recommendations Q.120 - Q.180 (Study Group XI). FASCICLE VI.3 Specifications of signalling system No. 6. Recommendations Q.251 - Q.300 (Study Group XI). FASCICLE VI.4 Specifications of signalling systems R1 and R2. Recommendations Q.310 - Q.490 (Study Group XI). FASCICLE VI.5 Digital transit exchanges for national and international applications. Interworking of signalling systems. Recommendations Q.501 - Q.685 (Study Group XI). FASCICLE VI.6 Specifications of signalling system No. 7. Recommendations Q.701 - Q.741 (Study Group XI). FASCICLE VI.7 Functional Specification and Description Language (SDL). Man-machine language (MML). Recommendations Z.101 - Z.104 and Z.311 - Z.341 (Study Group XI). FASCICLE VI.8 CCITT high level language (CHILL). Recommendation Z.200 (Study Group XI). Volume VII FASCICLE VII. 1 Telegraph transmission and switching. Series R, U Recommendations (Study Group IX). FASCICLE VII.2 Telegraph and “telematic services” 1) terminal equipment. Series S, T Recommendations (Study Group VIII). Volume VIII FASCICLE VIII. 1 Data communication over the telephone network. Series V Recommendations (Study Group XVII). FASCICLE VIII.2 Data communication networks; services and facilities, terminal equipment and interfaces. Recommendations X.l - X.29 (Study Group VII). FASCICLE VIII.3 Data communication networks; transmission, signalling and switching, network aspects, maintenance, administrative arrangements. Recommendations X.40 - X.l 80 (Study Group VII). Volume IX Protection against interference. Series K Recommendations (Study Group V). Protection of cable sheaths and poles. Series L Recommendations (Study Group VI). Volume X FASCICLE X.l Terms and definitions. FASCICLE X.2 Index of the Yellow Book. ^ “Telematic services” is used provisionally. CONTENTS OF FASCICLE VII 1.1 OF THE YELLOW BOOK Part I — Series V Recommendations Data communication over the telephone network Rec. No. Page Principles governing the collaboration between the CCITT and other international organizations in the study of data communications..................................................................................................................................................... 3 SECTION 1 - General V.l Equivalence between binary notation symbols and the significant conditions of a two-condition c o d e ........................................................................................................................................ 5 V.2 Power levels for data transmission over telephone lines .................................................................. 7 V.3 International alphabet No. 5 ........................................................................................................................ 9 V.4 General structure of signals of international alphabet No. 5 code for data transmission over public telephone netw orks ................................................................................................................ 20 V.5 Standardization of data signalling rates for synchronous data transmission in the general switched telephone network ...................................................................................................... 22 V.6 Standardization of data signalling rates for synchronous data transmission on leased telephone-type circuits ................................................................................................................................. 23 V.7 Definitions of terms concerning data communication over the telephone network .... 24 SECTION 2 — Interfaces and voice-band modems Y.10 Electrical characteristics for unbalanced double-current interchange circuits for general use with integrated circuit equipment in the field of data com munications........................... 27 V.ll Electrical characteristics for balanced double-current interchange circuits for general use with integrated circuit equipment in the field of data com m unications .................................. 43 V.15 Use of acoustic coupling for data transmission ................................................................................... 56 V.16 Medical analogue data transmission modems ....................................................................................... 57 V.19 M odem s for parallel data transm ission using telephone signalling fre q u en c ies....................... 63 Fascicle VII LI — Table of Contents V Rec. No. Page V.20 Parallel data transmission modems standardized for universal use in the general switched telephone netw ork ...................................................................................................................... 66 V.21 300 bits per second duplex modem standardized for use in the general switched telephone network .................... 71 V.22 1200 bits per second duplex modem standardized for use on the general switched telephone network and on leased circuits .............................. 76 V.23 600/1200-baud modem standardized for use in the general switched telephone network . 91 V.24 List of definitions for interchange circuits between data terminal equipment and data circuit-terminating equipm ent................................................................................................................... 97 V.25 Automatic calling and/or answering equipment