1、INTERNATIONAL TELECOMMUNICATION UN ION ITU=T TELECOM M U N KATION STANDARDIZATION SECTOR OF ITU VA 7 Corrigendum I (09198) SERIES V: DATA COMMUNICATION OVER THE TELEPHONE NETWORK Interfaces and voiceband modems A 2-wire modem for facsimile applications with rates up to 14 400 bitls Corrigendum I ITU
2、-T Recommendation V.17 - Corrigendum 1 (Previously CCITT Recommendation) _ STD.ITU-T RECMN Va17 CORR= 1-ENGL i1998 m 4862591 Ohhq2h5 223 ITU-T V-SERIES RECOMMENDATIONS DATA COMMUNICATION OVER THE TELEPHONE NETWORK General v. 1 -v. 9 Wideband modems v.35-v. 39 Error control V.40-V.49 Transmission qua
3、lity and maintenance v.50-v.59 Interworking with other networks v.100-v.199 Simultaneous transmission of data and other signals Interface layer specifications for data communication V.200-V.249 Control procedures V.250-V.299 Modems on digital circuits V. 300-V.399 V.60-V.99 For further details, plea
4、se refer to ITU-T List of Recommendations. - STD-ITU-T RECMN Va37 CORR- 1-ENGL 3976 4862593 Obb42bb LbT ITU-T RECOMMENDATION V.17 A 2-WIRE MODEM FOR FACSIMILE APPLICATIONS WITH RATES UP TO 14 400 bit/s CORRIGENDUM 1 Source Corrigendum 1 to ITU-T Recommendation V.17 was prepared by ITU-T Study Group
5、16 (1997-2000) and approved on the 25th of September 1998. Recommendation V.17Kor.l (09/98) 1 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (IT-T) is a permanent organ
6、 of the ITU. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establis
7、hes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the IT-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fall within ITU-T
8、?s purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation the term recognized operating agency (ROA) includes any individual, company, corporation or governmental organization that operates a public conespondence service. The terms Admini
9、stration, ROA and public correspondence are defined in the Constitution of the ITU (Geneva, 1992). INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU
10、takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU had not received notice of intellectua
11、l property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 1999 All rights reserved. No part of this public
12、ation may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. 11 Recommendation V.17Kor.l (09198) Recommendation V.17 Segment 1 ABAB alternations Long train 256 Resync. 256 A 2-WIRE MODEM F
13、OR FACSIMILE APPLICATIONS WITH RATES UP TO 14 400 bih Segment 2 Segment 3 Segment 4 Equalizer Bridge Scrambled Total Approximate training signai ONES symbol time (ms) 2976 64 48 3344 1393 38 - 48 342 142 signal interval CORRIGENDUM 1 (Geneva, 1998) 1) Table 3 Amend Table 3 as follows: 2) Subclause 3
14、.7 Amend subclause 3.7 as follows: 3.7 Circuit 109 threshold -43 dBm ON. c -48 dBm OFF. Recommendation V.17Kor.l (09/98) 1 - c eries A )cries B leries C leries D ieries E ieries F ieries G ;cries H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Ser
15、ies T Series U Series V Series X Series Y Series Z ITU-T RECOMMENDATIONS SERIES Organization of the work of the ITU-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operati
16、on and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated services digital network Transmission of television, sound programme and other multimedia signals Protection against interference C
17、onstruction, installation and protection of cables and other elements of outside plant TMN and network maintenance: international transmission systems, telephone circuits telegraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifi
18、cations of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communications Global information infrastructure and Internet protocol aspects Languages and general software aspects for telecommunication systems Printed in Switzerland Geneva, 1999
