1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T V.59 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 1 (07/2001) SERIES V: DATA COMMUNICATION OVER THE TELEPHONE NETWORK Transmission quality and maintenance Managed objects for diagnostic information of public switched telephone network conne
2、cted V-series modem DCEs Corrigendum 1 ITU-T Recommendation V.59 Corrigendum 1 (Formerly CCITT Recommendation) ITU-T V-SERIES RECOMMENDATIONS DATA COMMUNICATION OVER THE TELEPHONE NETWORK General V.1V.9 Interfaces and voiceband modems V.10V.34 Wideband modems V.35V.39 Error control V.40V.49 Transmis
3、sion quality and maintenance V.50V.59 Simultaneous transmission of data and other signals V.60V.99 Interworking with other networks V.100V.199 Interface layer specifications for data communication V.200V.249 Control procedures V.250V.299 Modems on digital circuits V.300V.399 For further details, ple
4、ase refer to the list of ITU-T Recommendations. ITU-T V.59/Cor.1 (07/2001) i ITU-T Recommendation V.59 Managed objects for diagnostic information of public switched telephone network connected V-series modem DCEs CORRIGENDUM 1 Summary Corrigendum 1 to V.59 has various modifications for clarification
5、s of ITU-T V.59. Source Corrigendum 1 to ITU-T Recommendation V. 59 was prepared by ITU-T Study Group 16 (2001-2004) and approved under the WTSA Resolution 1 procedure on 29 July 2001. ii ITU-T V.59/Cor.1 (07/2001) FOREWORD The International Telecommunication Union (ITU) is the United Nations specia
6、lized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a
7、worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down
8、in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication ad
9、ministration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or appl
10、icability 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, ITU had received notice of intellectual property, protected by patents, which may be required to implemen
11、t 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. ITU 2002 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, elec
12、tronic or mechanical, including photocopying and microfilm, without permission in writing from ITU. ITU-T V.59/Cor.1 (07/2001) 1 ITU-T Recommendation V.59 Managed objects for diagnostic information of public switched telephone network connected V-series modem DCEs CORRIGENDUM 1 1) Clause 5 Clarifica
13、tion that V.59 uses X.691 PER Although it is implied by the inclusion of the reference to ITU-T X.691, V.59 does not explicitly indicate which Packet Encoding Rules should be used. A clarification is essential since it defines how to encode the various data types. The following sentence is to be add
14、ed to the end of the final paragraph of clause 5 just prior to 5.1. ORIGINAL TEXT The presentation of the managed objects within this Recommendation complies with the specification of ASN.1 (see ITU-T X.680). The ASN.1 as defined in Annex A should be used in conjunction with the object definitions t
15、o provide a complete overview of the diagnostics. END ORIGINAL REPLACEMENT TEXT The presentation of the managed objects within this Recommendation complies with the specification of ASN.1 (see ITU-T X.680). The ASN.1 as defined in Annex A should be used in conjunction with the object definitions to
16、provide a complete overview of the diagnostics. The ASN.1 encoding in Annex A should employ the BASIC-ALIGNED version of Packed Encoding Rules (PER) according to ITU-T X.691. END REPLACEMENT 2) Clause 6.2 Clarify the interpretation of ASN.1 built-in definitions This modification further clarifies ho
17、w to interpret the various built-in definitions of the ASN.1 used in ITU-T V.59, such as the types BOOLEAN, INTEGER, NULL etc. The following paragraph replaces the one similar that is the first in 6.2: ORIGINAL TEXT The data types used in this Recommendation are based upon those defined in ASN.1. Fo
18、r types defined as an IA5 STRING (International Alphabet No. 5), the following string types are used. END ORIGINAL REPLACEMENT TEXT The data types used in this Recommendation are based upon those defined in ASN.1. For details to the encoding of the ASN.1 built-in data types refer to ITU-T X.691. For
19、 types defined as an IA5 STRING (International Alphabet No. 5), the following string types are used. END REPLACEMENT 2 ITU-T V.59/Cor.1 (07/2001) 3) Clause 6.2.3 Clarify the definition of Bit Strings In 6.2.3 that provides the definition of the Bit String data type, no guidance as to the ordering of
20、 the bits is given. The following text should be used to replace that of 6.2.3: ORIGINAL TEXT 6.2.3 BIT STRING Where BIT STRING is used to identify an object a 0 indicates non-availability or disabled, a 1 indicates availability or enabled. END ORIGINAL REPLACEMENT TEXT 6.2.3 BIT STRING Where BIT ST
21、RING is used to identify an object a 0 indicates non-availability or disabled, a 1 indicates availability or enabled. Bit Strings containing multiple elements shall be displayed using bit 0 in the least significant bit position. Example v42featureNegotiation00000000001, where the 1 is the value of t
22、he zero-eth bit. END REPLACEMENT 4) Clause 6.8.5 Correct typographical error in V.92 objects definition table In 6.8.5 for the table of V.92 modulation objects, the Tag-ID definition of the cP object is missing its last digit. ORIGINAL TEXT cP 0B5 END ORIGINAL REPLACEMENT TEXT cP 0B54 END REPLACEMEN
23、T 5) Clause 6.9 Clarification of the definition of txCarrier and rxCarrier low level objects The descriptions for the low level objects txCarrier and rxCarrier are vague and are not differentiated between themselves and the modulationHistory object. The intent of these objects was that the carrier o
24、bjects would not be a list, but rather the indicator of the modulation employed by the transmitter and receiver at the end of the connection. The following text needs to replace that used for the descriptions of the txCarrier and rxCarrier objects (Tag-IDs 2C01 and 2C02) in 6.9 (Connection Diagnosti
25、c Object Attributes). ORIGINAL TEXT Object: txCarrier Tag-ID: 01 Description: This object is a text string that is used in the same manner as defined in 6.4.1 and Table 13/V.250. Data type: IA5STRING:simpleText Mandatory: Yes ITU-T V.59/Cor.1 (07/2001) 3 Object: rxCarrier Tag-ID: 02 Description: Thi
26、s object performs the same function as described in txCarrier above and it uses the same definition. Data type: IA5STRING:simpleText Mandatory: Yes END ORIGINAL REPLACEMENT TEXT Object: txCarrier Tag-ID: 01 Description: This object contains the modulation last used by the transmitter in the connecti
27、on and is a text string that is used in the same manner as defined in 6.4.1 and Table 13/V.250. Data type: IA5STRING:simpleText Mandatory: Yes Object: rxCarrier Tag-ID: 02 Description: This object performs the same function as described in txCarrier above except that it applies to the receiver and i
28、t uses the same definition. Data type: IA5STRING:simpleText Mandatory: Yes END REPLACEMENT Printed in Switzerland Geneva, 2002 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series B Means of expression: definitions, symbols, classification Series C General telecommunicat
29、ion statistics Series D General tariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia sys
30、tems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cables and other elements of outside plant Series M TM
31、N and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Telephone transmission quality
32、, telephone installations, local line networks Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks and open system communications Series Y Global information infrastructure and Internet protocol aspects Series Z Languages and general software aspects for telecommunication systems
