1、1 STD-ITU-T RECMN X-301i-ENGL L79b W LiBb2591 Ob29878 220 W INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU X.301 (1 O96) SERIES X: DATA NETWORKS AND OPEN SYSTEM COM M U N I CATI ON Interworking between networks - General Description of the general arrange
2、ments for call control within a subnetwork and between subnetwork for the provision of data transmission services ITU-T Recommendation X.301 (Previously CCilT Recommendation) ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS AND OPEN SYSTEM COMMUNICATION PUBLIC DATA NETWORKS Services and facilities Inter
3、faces Transmission, signalling and switching Network aspects Maintenance Administrative arrangements OPEN SYSTEM INTERCONNECTION Model and notation Service definitions Connection-mode protocol specifications Connectionless-mode protocol specifications PICS profomas Protocol Identification Security P
4、rotocols Layer Managed Objects Conformance testing INTERWORKING BETWEEN NETWORKS Satellite data transmission systems MESSAGE HANDLING SYSTEMS DIRECTORY OS1 NETWORKING AND SYSTEM ASPECTS Networking Efficiency Naming, Addressing and Registration Abstract Syntax Notation One (ASN. i) Systems Management
5、 framework and architecture Management Communication Service and Protocol Structure of Management Information Management functions OS1 MANAGEMENT SECURITY OS1 APPLICATIONS Commitment, Concurrency and Recovery Transaction processing Remote operations OPEN DISTRIBUTED PROCESSING For further details, p
6、lease refer to ITU-T List of Recommendations. X. l-X. 199 Transmission, signalling and switching X.50-X.89 aspects X.90-X. 149 X. 150-X. 179 Administrative arrangements X.180-X.199 X.200-X.299 and notation X.200-X.209 X.21-X.219 protocol specifications X.220-X.229 protocol specifications X.230-X.239
7、 Security Protocols X.270-X.279 X.240-X.259 X.260-X.269 X.280-X.289 X.290-X.299 x.400-x.499 x.5oex.599 X.600-X.699 Networking X.600-X.629 Efficiency X.630-X.649 and Registration X.650-X.679 X.680-X.699 X.700-X.799 X.700-X.709 X.710-X.719 Structure of X.720-X.729 functions X.730-X.799 X.800-X.849 X.8
8、50-X.899 and X.850-X.859 Transaction processing X.860-X.879 Remote operations X.880-X.899 OPEN DISTRIBUTED PROCESSING X.900-X.999 X. l-X. 19 X.20-X.49 II X.300-X.399 x.350-x.399 o - STD-ITU-T RECMN X-301-ENGL 199b 48b2591 Ob29880 989 FOREWORD The IT-T (Telecommunication Standardization Sector) is a
9、permanent organ of the International Telecommunication Union (IT). The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommen- dations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization C
10、onference (WTSC), which meets every four years, establishes 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 ITU-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsin
11、ki, March 1-12, 1993). ITU-T Recommendation X.301 was revised by IT-T Study Group 7 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 5th of October 1996. NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunica
12、tion administration and a recognized operating agency. O ITU 1997 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 fi-om the IT. Recommendation X.3
13、01 (10/96) 1 CONTENTS Page 1 Scope and field of application 2 2 References 2 3 Definitions 4 4 Abbreviations . 5 5 General aspects of call control . 6 5.2 Classification of internetwork signals . 7 5.3 General principles concerning internetwork signals . 7 . 5.1 Model applicable to internetwork arra
14、ngements 6 6 7 Transfer of addressing information 9 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 General Transfer of X. 12 1 calling address . Transfer of X. 12 1 called address Transfer of E. 164 called address Format of X.121 addresses . Format of E. 164 addresses Transfer of address information additional to
15、Recommendations X. 121 and E. 164 Transfer of E.164 calling address . Arrangements for user facilities (see Note I) . 7.1 Facilities related to the Quality of Service (QOS) for the call 7.2 Transit delay . 7.4 7.5 Facilities relating to specific routing conditions requested by the user of the call .
16、 7.6 7.7 Facilities to convey user data in addition to the normal data flow in the data transfer phase . 7.8 Other facilities 7.3 Throughput . Facilities relating to the charging conditions applying to the call Facilities related to protection mechanisms requested by the user of the call 9 10 13 13
17、15 15 16 17 18 19 24 25 27 29 38 51 53 8 Arrangements for call progress signais 56 8.1 Interworking arrangements involving call progress signals defined in Recommendation X.96 8.2 internetwork arrangements involving call progress signals defined in Recommendation 8.3 Internetwork arrangements involv
18、ing call progress signals defined in Recommendation 8.4 Internetwork arrangements involving call progress signals defined in Recommendations X.96 and 4.93 1 62 8.5 Internetwork arrangements involving call progress signals defined in Recommendations X.96 and Q.699 62 8.6 Internetwork arrangements inv
19、olving call progress signals defined in Recommendations 4.93 1 and 4.699 62 only . 57 4.93 1 only 62 4.699 only 62 Appendix 1 - Protocol elements of different networks used for the facilities and arrangements described in this Recommendation . 63 1.1 Circuit switched data transmission services 63 1.
20、2 Packet switched data transmission services 63 11 Recommendation X.301 (10196) - STD-ITU-T RECMN X.3OL-ENGL 177b W 48b257L Ob27882 751 = INTRODUCTION This Recommendation is one of a set of Recommendations produced to facilitate consideration of interworking between networks. It is related to Recomm
21、endation X.300, which defines the general principles for interworking between public networks, and between public networks and other networks for the provision of data transmission services. Recommendation X.300 indicates, in particular, how collections of physical equipment can be considered as “su
22、bnetworks” for consideration of interworking situations. This Recommendation describes general arrangements for call control within and between subnetworks for the provision of data transmission services. Only those arrangements are described that may (also) have significance for end users of a call
23、. Facilities that are not visible to end users of a call are the subject of other Recommendations (e.g. those arrangements described in Recommendation X.302). . Recommendation X.301 (10/96) 111 - STD*ITU-T RECMN X-30L-ENGL L77b m VBb257L Ob27883 b78 m Recommendation X.301 DESCRIPTION OF THE GENERAL
24、ARRANGEMENTS FOR CALL CONTROL WITHIN A SUBNETWORK AND BETWEEN SUBNETWORKS FOR THE PROVISION OF DATA TRANSMISSION SERVICES (Formerly Part of Recornmendation X.300, Maluga-Tomemolinos, 1984; amended at Melbourne, 1988 und Helsinki, 1993; revised in 1996) The ITU-T, considering (4 access to, public dat
25、a networks and ISDN; that Recommendation X.l defines the international user classes of service, in and the different categories of (b) that Recommendation X.2 defines the international user services and facilities in PDNs and ISDN; (cl user facilities; that Recommendation X.96 defines call progress
26、signals including those used in conjunction with international (d) that Recommendations X.20, X.20 bis, X.21, X.21 bis, X.25, X.28, X.29, X.32, X.351 and X.352 already specie the detailed procedures applicable to different types of DTEDCE interfaces on PDNs and that Recommendations X.30, X.3 1,1.420
27、 and 1.421 specie detailed procedures applicable for access to ISDN; (e) that Recommendations X.61, X.70, X.71 and X.75 already specie the detailed procedures applicable to call control between two PDNs on the same type and that Recommendation X.75 can also be applied for intenvorking between differ
28、ent PDNs and for interworking involving ISDN; (f) services); that PDNs and JSDNs may be used to support ITL.7-T recommended services (in particular, Telematic (g) applications; that Recommendation X.200 specifies the reference model of open systems interconnection for ITU-T (h) Interconnection for I
29、T-T applications; that Recommendation X.213 defuies the connection-mode Network Service (NS) of Open Systems (i) parameters and values required for public data transmission services; that Recommendations X.130, X.131, X.134, X.135, X.136, X.137 and X.140 define the Quality of Service ci) between pub
30、lic networks and other networks for the provision of data transmission services; that Recommendation X.300 defines the general principles for interworking between public networks and (k) subnetwork and intermediate utilities between subnetworks for the provision of data transmission services; that R
31、ecommendation X.302 describes the general arrangements for internal network utilities within (1) requirements for transfemng operational information between Administrations; that interworking with Common Channel Signalling Network (CCSN) needs to be considered, in view of the (m) conditions between
32、networks; the need that DTEs can communicate through different networks, and through different interworking (n) public networks for the provision of data transmission services; the need for arrangements for intenvorking between public networks and between public networks and other Recommendation X.3
33、01 (10/96) 1 (0) the need, in particular: - for certain user facilities and network utilities for communication through the national networks between the internationally designed data terminal equipment interface protocols and intemational inter-exchange control and signalling procedures; - - for ce
34、rtain internationally defined network utilities for international operation of public networks; for compatibility and uniformity in the principle for realization of intemational user facilities and network utilities in public networks, unanimously recommends that arrangements for call control interw
35、orking between public networks and between public networks and other networks, and that the necessary elements: - - for realization of interworking between different networks providing data transmission service; and for realization of international user facilities and network utilities for data tran
36、smission services, be in accordance with the principles and procedures specified in this Recommendation. 1 Scope and field of application The purpose of this Recommendation is to describe detailed internetwork arrangements for call control applicable to interworking at the OS1 network layer, includi
37、ng some of the arrangements necessary to provide support for the capability of the OS1 connection-mode NS. These arrangements are not applicable to interworking involving communication capability as described in 7.2K.300. It is for further study whether or not any of these arrangements are also appl
38、icable to other types of interworking, for example, interworking by port access as described in Recommendation X.300. Arrangements that are solely used for internal or internetwork operation, and which are not visible for end-users, are not described in this Recommendation. For such arrangements, se
39、e Recommendation X.302. 2 Refer en ces The following Recommendations, and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references a
40、re subject to revision: all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid Recommendations is regularly published. - CCITT Recommendation
41、E.164h.331 (1991), The numberingplan for the ISDN era. - 1.230-Series Recommendations, Integrated services digital network - Services capabilities - Bearer services supported by an ISDN. - 1.250-Series Recommendations, Integrated services digital network - Services cupabilities - Supplementaly servi
42、ces in ISDN. - CCITT Recommendation 1.420 (1984), Basic user-network interface. - - CCITT Recommendation 1.421 (1984), Primary rate Ger-network interface. CCITT Recommendation 4.699 (1988), Interworking between the Digital Subscriber Signalling System layer 3 protocol and the Signalling System No. 7
43、 ISDN user part. 2 Recommendation X.301 (1 0/96) JTU-T Recommendation 4.93 1A.45 1 (1993), Digital Subscriber Signaling System No. I (DSS I) - ISDN user-network interface layer 3 specipcation for basic call control. ITU-T Recommendation X. 1 (1996), International user classes of service in, and cate
44、gories of access to, public data networks and Integrated Services Digital Networks (ISDNs). JT-T Recommendation X.2 (1996), International data transmission services and optional user facilities in public data networks and ISDNs. CCITT Recommendation X.20 (1988), Interface between Data Terminal Equip
45、ment TE) and Data Circuit-terminating Equipment (DCE) for start-stop transmission services on public data networks. CCITT Recommendation X.20 bis (1988), Use on public data networks of Data Terminal Equipment (DTE) which is designed for interfacing to asynchronous duplex V-Series modems. CCITT Recom
46、mendation X.21 (1992), Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for synchronous operation on public data networks. CCITT Recommendation X.21 biv (1988), Use on public data networks of Daia Terminal Equipment (DTE) which is designed for interfacing
47、to synchronous V-Series modems. CCITT Recommendation X.22 (1988), Multiplex DTE/DCE interface for user classes 3-6. IT-T Recommendation X.25 (1996), Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and connected t
48、o public data networks by dedicated circuit. IT-T Recommendation X.28 (1993), DTE/DCE interface for a start-stop mode data terminal equipment accessing the Packet Assembly/Disassembly (PAD) facility in a public data network situated in the same country. 1T-T Recommendation X.29 (1993), Procedures fo
49、r the exchange of control information and user data between a Packet Assembly/Disassembly (PAD) facility andpacket mode DTE or another PAD. ITU-T Recommendation X.30D.461 (1993), Support ofX.21, X.21 bis andX.20 bis based Data Terminal Equipments (DTEs) by an Integrated Services Digital Network (ISDN). ITU-T Recommendation X.3 1A.462 (1995), Support ofpacket mode terminal equipment by an ISDN. ITWT Recommendation X.32 (1996), Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and accessin
