1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU X.28 Amendment I (03/2 O0 O) SERIES X: DATA NETWORKS AND OPEN SYSTEM COM MUN ICATIONS Public data networks - Interfaces DTE/DCE interface for a start-stop mode data terminal equipment accessing the Packet Ass
2、embly/Disassembly facility (PAD) in a public data network situated in the same country Amendment 1 : Extensions of PAD parameter settings and PAD service signals ITU-T Recommendation X.28 - Amendment 1 (Formerly CCITT Recommendation) ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS AND OPEN SYSTEM COMMU
3、NICATIONS PUBLIC DATA NETWORKS Services and facilities Interfaces Transmission, signalling and switching Network aspects Maintenance Administrative arrangements Model and notation Service definitions Connection-mode protocol specifications Connectionless-mode protocol specifications PICS profomas Pr
4、otocol Identification Security Protocols Layer Managed Objects Conformance testing General Satellite data transmission systems IP-based networks MESSAGE HANDLING SYSTEMS DIRECTORY OS1 NETWORKING AND SYSTEM ASPECTS Networking Efficiency Qualiy of service Naming, Addressing and Registration Abstract S
5、yntax Notation One (ASN. 1) Systems Management framework and architecture Management Communication Service and Protocol Structure of Management Information Management functions and ODMA functions OPEN SYSTEMS INTERCONNECTION INTERWORKING BETWEEN NETWORKS OS1 MANAGEMENT SECURITY OS1 APPLICATIONS Comm
6、itment, Concurrency and Recovery Transaction processing Remote operations OPEN DISTRIBUTED PROCESSING X.l-X.19 X.20-X.49 X.50-X.89 X.90-X.149 X.150-X.179 X.180-X.199 X.200-X.209 X.210-X.219 X.220-X.229 X.230-X.239 X.240-X.259 X.260-X.269 X.270-X.279 X.280-X.289 X.290-X.299 X.300-X.349 X.350-X.369 x.
7、370-x.399 X.400-X.499 X.500-X.599 X.600-X.629 X.630-X.639 X.640-X.649 X.650-X.679 X.680-X.699 X.700-X.709 X.7 10-X.7 19 X.720-X.729 X.730-x.799 X.800-X.849 X.850-X.859 X.860-X.879 X.880-X.899 X.900-X.999 For further details, please refer to the list of ITU-TRecommendations. ITU-T Recommendation X.28
8、 DTE/DCE interface for a start-stop mode data terminal equipment accessing the Packet Assembly/Disassembly facility (PAD) in a public data network situated in the same country AMENDMENT 1 Extensions of PAD parameter settings and PAD service signals Summary This amendment to ITU-T Recommendation X.28
9、 contains extensions to the PAD parameter settings in line with ITU-T Recommendation X.3 (2000). It also includes additional possible PAD service signals text in Chinese for extended dialogue mode. Source Amendment 1 to ITU-T Recommendation X.28 was prepared by ITU-T Study Group 7 (1 997-2000) and a
10、pproved under the WTSC Resolution 1 procedure on 3 1 March 2000. FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is respon
11、sible 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, establishes the topics for study by the
12、ITU-T study groups which, in tum, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSC Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborati
13、ve basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementati
14、on of this Recommendation may involve the use of a claimed Intellectual Property Right. IT 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
15、the date of approval of this Recommendation, ITU had not received notice of intellectual 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
16、consult the TSB patent database. o ITU 2001 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from ITU. ITU-T Recommendation X.28 Transparent standa
17、rd profile (Note 2) DTE/DCE interface for a start-stop mode data terminal equipment accessing the Packet AssemblyDisassernbly facility (PAD) in a public data network situated in the same country Simple standard (Note 4) AMENDMENT 1 Extensions of PAD parameter settings and PAD service signals The def
18、ault packet size is network dependent (value O) 1) Table 1 Add a new row to Table l/X28: The default packet size is network dependent (value O) Parameter reference number (Note 3) 30 (Note 6) Parameter description Parameter setting for ITU-T standard profile (Note 2) Selection of the default packet
19、size 2) Annex C Add the following to Annex C C.3 Possible PAD sewice signals text in Chinese for extended dialogue mode 1, Engaged: 6 45328) I T4763) (3.5.1 I) 2 Free: q3153) q4748) (3.5.1 1) 3 Reset PAD service signal (Table 5) DTE: 014293) 2 rif3061) a q3141) a (3660) li 72210) i (4207), (0312) 6
20、a5222) a 8 (2243) Ef4172) f 41724) a 12420) a 74627) p314) ERR: 6 r(1730) q2156) (3061) 5 q3141) a (3660) li 72210) i +(4207), (0312) (4627) 3031 4) NC: a 1(5141)i 35158) (5347), (0312) n(4293) 2 rif3061) 2 q3141) a (3660) li 72210) i (4207), (0312) (2420) a 74627) 314) RPE: 6 95222) a q2243) 72570)
21、 0 41944) * f2077) f f4683), (0312) o(4293) 2 (3061) 2 q3141) a (3660) li 72210) i +(4207), (0312) f4588) 43471) 12420) a x (4627) 70314) 72570) 0 41944) q2077) f a4683), (0312) 014293) 2 f4588) 43471) - 12420) a x q3357) E 34217) 0 32136) 2 f4588) 43471) 5 72542) 0 1 4 Clear PAD service signal (Tab
22、le 6) OCC: 0 45328) rif4763), (0312) 071880) 6 F(1993) 72684) 32948) 0 314) NC: 75261) 34217) 0 32136) f4588) 43471) 5 72542) 0 1(5347), (0312) 01 (1880) 6 F(1993) 72684) 32948) (b314) INV: C 94662) (1 880) 6 F(1993) y2684) q2948) 0 314) NA: 0 $2951) fi y4075) 012637) (1993) ERR: 2 q4588) 43471) (19
23、44) * q2077), (0312) 071880) 6 F(1993) 13 72684) RPE: (1944) * f2077), (0312) Oq1880) NP: 6 q4620) 6 q2354) (1 993) DER: 012637) q3475) 72542) 3(5347), (0312) 071880) 6 71993) 72684) 2 3 (2948) 0 314) PAD: 6 95222) a 92243) c q3975) 2 13983) , (0312) 071880) 6 F(1993) (2948) 0 I3 14) 14807) 32136) $
24、4172) i 44209) c q3975) 2 13983), (0312) 01 q3475) e f(4260) 6 y5572), (0312) 071880) 6 F q2684) 5 72948) u (b314) 12876) q1866) a $2129) 6 r(1730) q2156) 72570) 0 $1 72948) 0 (b314) f4588) 43471) fG 12876) q1866) a $2129) 95222) Ci q2156) 72570) 0 1 71993) 72684) g3768) 0 12136) 012637) q2948) 0 R3
25、14) ?3475), (0312) 071880) 0 F 72684) 2 32948) 0 (b314) 72684) 3 5 Clear confirmation PAD service signal (Table 7) CONF: 0 q5404) DTE: q3141) a 0 314) (3660) li 72210) i (4207) o(4293) q3061), (0312) 03 (1 880) 0 F(1993) 22684) q2948) fb31 4) RNA: 2 q3060) x E(3088) e q2320) y4782) (1993) 0 52684) 5
26、 q2948) 0 fb314) ID: 6 11827) (1 880) 6 F(1993) 52684) q2948) 0 fb314) SA: 72684) (1 993) 0 52684) 5 32948) 0 314) y4221) 0 22684) 5 $2948) 0 13969) 6 T1993) 0 fb314) f2838) . q2349) , (0312) ol(1880) 6 F T2870) (4061) 0 3(2136) C 33631) 0 1(2136) i3 ?2156), (0312) 04 32948) C q4662) e 92308) 5 1290
27、8) C *3302), (0312) oq1880) 6 F FNA: 2 T3060) 36 E(3088) 0 q3176) i q4357) (4901) q5281), (0312) ol(1880) 6 F (1993) 52684) 2 q2948) 0 314) ROO: C q4662) q2308) i (1620) c 93975) (1880) 6 F(1993) 0 52684) q2948) 0 314) 13983) 74916) a v3423) , (031 2) all SERIES OF ITU-T RECOMMENDATIONS Series A Ser
28、ies B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z Organization of the work of ITU-T Means of expression: definitions, symbols, classifica
29、tion General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated se
30、rvices digital network Transmission of television, sound programme and other multimedia signals Protection against interference Construction, installation and protection of cables and other elements of outside plant TMN and network maintenance: international transmission systems, telephone circuits,
31、 telegraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and signalling Telegraph transmission Telegraph serv
32、ices 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
