1、INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2931 Amendment 2 Corrigendum I (06/2000) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for access Sig na Hing Digital subscriber signalling system No. 2 - User-network int
2、erface (UNI) layer 3 specification for bas c ca I I/co n n ect i o n con t ro I Amendment 2 Corrigendum 1 ITU-T Recommendation Q.2931 - Amendment 2 - Corrigendum 1 (Formerly CCITT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE F
3、UNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM R 1 SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF
4、 SIGNALLING SYSTEM No. 7 43 INTERFACE DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK BROADBAND ISDN INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WOFUUNG CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS SIGNALLING REQUIRE
5、MENTS AND PROTOCOLS FOR IMT-2000 General aspects Signalling ATM adaptation layer (SAAL) Signalling network protocols Common aspects of B-ISDN application protocols for access signalling and network signalling and interworking B-ISDN application protocols for the network Signalling -i cess Q. 1-4.3 4
6、.4-4.59 4.60-Q.99 Q. 100-Q. 1 19 Q. 120-4.249 4.250-4.309 4.310-4.399 4.400-4.499 4.500-4.599 4.600-4.699 4.700-4.799 Q.800-Q.849 Q.850-Q.999 Q. 1000-Q. 1099 Q. 1 100-Q. 1 199 Q. 1200-4.1 699 Q.1700-4.1799 4.2000-4.2999 4.2000-4.2099 Q.2100-4.2199 4.2200-4.2299 4.2600-4.2699 4.2700-4.2899 Q.29O-4.29
7、99 For further details, please refer to the list of ITU-T Recommendations. ITU-T Recommendation 4.2931 Digital subscriber signalling system No. 2 - User-network interface (UNI) layer 3 specification for basic calYconnection control AMENDMENT 2 CORIUGENDUM 1 Summ ry This Corrigendum is being issued b
8、ecause an error has been detected in the description of the coding of the OUI fields in various DSS2 information elements. One of these, the “ATM adaptation layer corrigendum makes this amendment of ITU-T 4.293 1 consistent with a compatible correction introduced in Amendment 4/Q.293 1. The corrigen
9、dum only shows the corrected text. parameters“ information element is contained in ITU-T 4.2931 Amendment 2 (03/99). The 4 Source Corrigendum 1 to Amendment 2 to ITU-T Recommendation 4.2931 was prepared by ITU-T Study Group 1 1 (1 997-2000) and approved under the WTSC Resolution 1 procedure on 15 Ju
10、ne 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 responsible for studying technical, operating and tariff quest
11、ions 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 ITU-T study groups which, in turn, produce Recommendatio
12、ns on these topics. The approval of IT-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 collaborative basis with IS0 and IEC. NOTE In this Recommendation,
13、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 implementation of this Recommendation may involve the use of a claim
14、ed Intellectual Property Right. ITU 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, ITU had no
15、t 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 consult the TSB patent database. o ITU 2001 All rights
16、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 IT. ITU-T Recommendation 4.2931 Digital subscriber signalling system No. 2 - User-network interface (UNI
17、) layer 3 specification for basic calkonnection control AMENDMENT 2 CORRIGENDUM 1 Replace thejnal page of Table 4-6 with the following: Table 4-6/Q.2931 - AAL parameters information element le Source (octet I I. I, bits 8- 7 when octet 8. I = 0001 0001 for AAL type 2) IT-T predefined profile used (S
18、ee Annex PK366.2.) Other predefined profile used other values reserved. nedprofile (octet 11.2, when octet 8. I = 00010001 and octet 9, bits 8-5 = O000 for AAL type 2) contains the binary coded value for the profile identifier of the profile which is administered by thl on identified by the OUI in t
19、he following octets (if octet 1 1.1, bits 8-7 = 01) or which is Organizationally Unique IdentiJier (Our) (octets 11.3, 11.4 and 11.5, when octet 8.1 = 00010001; t 9, bits 8-5 = O000 and octet II. I, bits 8-7 = O1 TE 1 -The default AAL for voice is the AAL specified in ITU-T 1.363 for voiceband signa
20、l transpor TE 2 -For AAL for voice, no further parameters are specified beyond the ones given in part 1 of 8 o 4 - ITU-T 1.366.1 indicates that the parameters for the assured data transfer mechanism are specifiel TE 5 -The assured data transfer mechanism can only be selected if the transmission erro
21、r detectio echanism is also detected. Table 4-6/Q.2931 - AAL parameters information element (concluded) IOTE 6 - If the value of this parameter is disabled, the user shall not change to Circuit Mode Data 01 acsimile Demodulation operation. OTE 7 - If octet 9, bits 8-5 = O001 (Multirate service), tra
22、nsport of Circuit Mode Data must be enabled. IOTE 8 - In case of the absence of AAL parameter subfields, the following default values will apply: Subtype: no default (must be signalled for AAL type 1). CBR Rate: no default (must be signalled for AAL type 1). Multiplier: no default (must be signalled
23、 for CBR Rate n = 64 kbits and n = 8 kbit/s). Clock Frequency Recovery: default = null. Error Correction: default = null. SDT Block Size: default = no SDT is used. Partially Filled Cells: default = partially filled cells method is not used, i.e. cells are fillec completely. Forward max. CPCS-SDU siz
24、e: default = 65 535 octets. Backward max. CPCS-SDU size: default = 65 535 octets. MID range: default = 0-0 (no multiplexing via MID field). SSCS-Type: default =null. Maximum CPS-SDU size: default = 45. Maximum number of multiplexed channels: default = 255. Assured data: default = mechanism not used.
25、 Error detect: default = not selected. Forward maximum SSSAR-SDU size: default = 65 535 octets. Backward maximum SSSAR-SDU size: default = 65 535 octets. Service category: default = audio service. PCM encoding: default = A-law. Profile source: default = ITU-T and predefined profile = 1. Fax, CAS, DT
26、MF, MF-R1, MF-R2, CMD, FMD: default = disabled. Maximum length of a frame mode data unit (for AAL type 2) = 65 535 octets. Series A Series 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
27、 T Series U Series V Series X Series Y Series Z SERIES OF ITU-T RECOMMENDATIONS Organization of the work of ITU-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation a
28、nd 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 Const
29、ruction, 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: intemational sound programme and television transmission circuits Specificati
30、ons 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
