1、 STDmITU-T RECMN X-32A-ENGL L97b qBb259L Ob27774 9LT E INTERNATIONAL TELECOMMUN CATION UN ION ITUmT TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU X.328 (1 0/96) SERIES X: DATA NETWORKS AND OPEN SYSTEM COM M U N I CAT I ON Interworking between networks - General General arrangements for interworkin
2、g between public data networks providing frame relay data transmission services and Integrated Services Digital Networks (ISDNs) for the provision of data transmission services ITU-T Recommendation X.328 (Previously CCITT Recommendation) STD-ITU-T RECMN X-32-ENGL 197b W Lib259L b27775 5b m - ITU-T X
3、-SERIES RECOMMENDATIONS DATA NETWORKS AND OPEN SYSTEM COMMUNICATION PUBLIC DATA NETWORKS X.1-X.199 Services and facilities X.1-X.19 Interfaces X.20-X.49 Transmission, signalling and switching X.50-X.89 Network aspects X.90-X. 149 Maintenance X.150-X.179 Administrative arrangements X.180-X.199 OPEN S
4、YSTEM INTERCONNECTION X.200-X.299 Model and notation X.200-X.209 Service definitions X.210-X.219 Connection-mode protocol specifications X.220-X.229 Connectionless-mode protocol specifications X.230-X.239 PICS proformas X.240-X.259 Protocol Identification X.260-X.269 Security Protocols X.270-X.279 L
5、ayer Managed Objects X.280-X.289 Conformance testing X.290-X.299 INTERWORKING BEmEN NETWORKS X.300-X.399 Satellite data transmission systems x.350-x.399 MESSAGE HANDLING SYSTEMS X .400-X .499 DIRECTORY X.500-X.599 OS1 NETWORKING AND SYSTEM ASPECTS X.600-X.699 Networking X.600-X.629 Efficiency X.630-
6、X.649 Naming, Addressing and Registration X.650-X.679 Abstract Syntax Notation One (ASN.l) X.680-X.699 OS1 MANAGEMENT X.700-X.799 Systems Management framework and architecture X.700-X.709 Management Communication Service and Protocol X.7 10-X.7 19 Structure of Management Information X.720iX.729 Mana
7、gement functions X.730-X.799 SECURITY X.800-X.849 OS1 APPLICATIONS X.850-X. 899 Commitment, Concurrency and Recovery X.850-X.859 Transaction processing X.860-X.879 Remote operations X.880-X.899 OPEN DISTRIBUTED PROCESSING x.900-x.999 Forjrther details, please refer to ITU-T List of Recommendations.
8、STD-ITU-T RECMN X-328-ENGL 277b I 48b2571 0b2777b 772 FOREWORD The ITU-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (ITU). The IT-T is responsible for studying technical, operating and tariff questions and issuing Recommen- dations on
9、 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 IT-T Study Groups which, in their turn, produce Recommendations on these topics. The approv
10、al of Recommendations by the Members of the IT-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsinki, March 1-12,1993). ITU-T Recommendation X.328 was prepared by ITU-T Study Group 7 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 5th of October 199
11、6. NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication 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, electr
12、onic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. Recommendation X.328 (10/96) 1 CONTENTS Page 1 Scope and field of operation 1 2 References 1 3 Definitions 2 4 Abbreviations . 3 5 General aspects . 3 5.1 FRPDN . 3 5.2 ISDN . 4 5.3 Call control bet
13、ween FRPDN and ISDN 4 5.4 Functionalities of the FRPDN and the ISDN 5 6 Specific interworking arrangements . 5 6.1 6.2 6.3 Interworking between FRPDN and ISDN where a Frame Relaying Bearer Service is requested Interworking between FRPDN and ISDN where a Packet Switched Bearer Service is requested .
14、5 6 8 Interworking between FRPDN and ISDN where a Circuit Switched Bearer Service is requested 11 Recommendation X.328 (10/96) STD-ITU-T RECMN X.328-ENGL L77b m qLib257L b27770 5b5 W SUMMARY This Recommendation defines general arrangements for the interworking between PDNs providing FRDTS and ISDNs
15、for the provision of data transmission services. These arrangements are applicable only to the interworking involving transmission capabilities and not to interworking involving communication capabilities as described in Recommendation X. 3 OO. . Recommendation X.328 (10/96) 111 STD-ITU-T RECMN X.32
16、fi-ENGL L77b = 49b257L Ob27777 qTL W Recommendation X.328 - GENERAL ARRANGEMENTS FOR INTERWORKING BETWEEN PUBLIC DATA NETWORKS PROVIDING FRAME RELAY DATA TRANSMISSION SERVICES AND INTEGRATED SERVICES DIGITAL NETWORKS (ISDNs) FOR THE PROVISION OF DATA TRANSMISSION SERVICES (Geneva, 1996) 1 Scope and
17、field of operation This Recommendation is one of a set of Recommendations produced to facilitate considerations of interworking between networks. It is based on Recommendation X.300, which defines the general principles for intenvorking between public networks, and between public networks and other
18、networks for the provision of data transmission services. Recommendation X.300 indicates in particular how collections of physical equipment can be represented as “subnetworks” for consideration in intenvorking situation. This Recommendation describes the intenvorking arrangements between Integrated
19、 Services Digital Networks (ISDNs) and Public Data Networks (PDNs) providing Frame Relay Data Transmission Services (FRDTS) for the provision of data transmission services. These arrangements are applicable only to the interworking involving transmission capabilities, and not to intenvorking involvi
20、ng communication capabilities as described in Recommendation X.300. 2 References 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. A
21、ll Recommendations and other references are 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 ITU-T Recommendations
22、is regularly published. - - - CCITT Recommendation E.164 (1991), Numberingplan for the ISDN era. CCITT Recommendation 1.230 (1988), Definition of bearer service categories. CCITT Recommendation 1.233.1 (1991), Frame mode bearer services: ISDN frame relaying bearer service. - IT-T Recommendation 1.37
23、2 (1993), Frame relaying bearer service network-to-network interface requirements. ITU-T Recommendation 1.500 (1993), General Structure of the ISDN Interworking Recommendations. ITU-T Recommendation 1.530 (1993), Network interworking between an ISDN and a Public Switched Telephone Network (PSTN). -
24、- - - IT-T Recommendation 1.555 (1993), Frame relaying bearer service intenvorking. CCITT Recommendation 4.922 (1992), ISDN data link layer specification for fiame mode bearer services. - IT-T Recommendation 4.93 1 (1993), ISDN user-network interface layer 3 specification for basic call control. - I
25、TU-T Recommendation 4.933 (1995), Integrated Services Digital Network (ISDN) Digital Subscriber Signalling System No. 1 (DSS 1) - Signalling specijcations for frame mode switched and permanent virtual connection control and status monitoring. ITU-T Recommendation X. 1 (1 996), International user cla
26、sses of service in, and categories of access to, public data networks and Integrated Services Digital Networks (ISDNs). - Recommendation X.328 (10/96) 1 - ITU-T Recommendation X.2 (1 996), International data transmission services and optional user facilities in public data networks and ISDNs. ITU-T
27、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 to public data networks by dedicated circuit. ITU-T Recommendation X.3 1A.462 (1999, Support ofpacket mode terminal equipm
28、ent by an ISDN. ITU-T Recommendation X.33 (1996), Access to packei switched data transmission services via flame relaying data transmission services. ITU-T Recommendation X.36 (1995)/Amendment 1 (1996), Switched Virtual Circuit (SVC) signalling and refinements of Permanent Virtual Circuit (PVC) sign
29、alling. ITU-T Recommendation X.75 (1996), Packet-switched signalling system between public networks providing data transmission services. ITU-T Recommendation X.76 (1999, Network-to-network interface between public data networks providing flame relay data transmission service. ITU-T Recommendation X
30、.12 1 (1 996), International numberingplan for public data networks. ITU-T Recommendation X. 122E. 166 (1 996), Numbering plan interworking for the E. I64 and X. I21 numbering plans. ITU-T Recommendation X.300 (1996), General principles for interworking between public networks and between public net
31、works and other networks for the provision of data transmission services. ITU-T Recommendation X.301 (1996), Description of the general arrangements for call control within a subnetwork and between subnetworks for the provision of data transmission services. CCITT Recommendation X.302 (1988), Descri
32、ption of the general arrangements for internal network utilities within a subnetwork and intermediate utilities between subnetworks for the provision of data transmission services. CCITT Recommendation X.305 (1988), Functionalities of subnetworks relating to the support of OSI connection-mode networ
33、k service. - - - - - - - - - - - - - ITU-T Recommendation X.320 (1996), General arrangements for interworking between Integrated Services Digital Networks (ISDNs) for the provision of data transmission services. ITU-T Recommendation X.32 1 (1996), General arrangements for interworking between Circui
34、t Switched Public Data Networks (CSPDNS) and Integrated Services Digital Networks (ISDNs) for the provision of data transmission services. CCITT Recommendation X.324 (1988), General arrangements for interworking between Packet Switched Public Data Networks (PSPDNs) and public mobile systems for the
35、provision of data transmission services. ITU-T Recommendation X.325 (1996), General arrangements for interworking between Packer Switched Public Data Networks (PSPDNs) and Integrated Services Digital Networks (ISDNs) for the provision of data transmission services. - - - 3 Definitions This Recommend
36、ation makes use of the following terms defined in Recommendation X.300: a) transmission capability; b) communication capability; c) subnetwork functionality; d) data transmission service; e) interworking by call-control mapping; I) interworking by port access. 2 Recommendation X.328 (10196) This Rec
37、ommendation makes use of the following terms defined in 1.230-Series Recommendations: a) circuit switched bearer service; b) c) frame mode bearer service. packet switched virtual circuit bearer service; This Recommendation makes use of the following terms defined in Recommendation X. 1 : a) b) c) d)
38、 Frame Relay Data Transmission Services; Frame Relay Public Data Network; Packet Switched Data Transmission Services; Packet Switched Public Data Network. 4 Abbreviations For the purposes of this Recommendation, the following abbreviations apply: CSPDN DTE Data Terminal Equipment ISDN Integrated Ser
39、vices Digital Network IWF Interworking Function FRBS Frame Relaying Bearer Service FRDTS FRPDN MSS Mobile Satellite System PDN Public Data Network PLP Packet Layer Protocol PSDTS PSPDN SS No. 7 TA Terminal Adaptor TE Terminal Equipment Circuit Switched Public Data Network Frame Relay Data Transmissi
40、on Services Frame Relay Public Data Network Packet Switched Data Transmission Services Packet Switched Public Data Network Signalling System No. 7 5 General aspects This Recommendation, in describing interworking arrangements between two subnetworks for the provision of data transmission services, a
41、dheres to the general principles of Recommendation X.300. The environments of these two subnetworks are described in the following subclauses. See also Table 1. 5.1 FRPDN The FRPDN provides Frame Relay Data Transmission Services (FRDTS) as defined in Recommendations. X. 1 and X.2 for the provision o
42、f data transmission services. The FRPDN may be accessed by DTEs by the category of access E as defined in Recommendation X.1. In addition, the FRPDN may also be accessed via other networks, e.g. PSPDN, FRPDN (see Recommendation X.76) or ISDN (this Recommendation). Recommendation X.328 (10/96) 3 STD-
43、ITU-T RECMN X.328-ENGL L77b 48b2.571 Ob27782 T7b W TABLE 1K.328 Comparison of general characteristics of FRPDN and ISDN General Characteristics Data Transmission Service/ Bearer Service Optional User Facilities/ Supplementary Services Categories of access Access via other networks PSTN CSPDN PSPDN F
44、RPDN MSS ISDN FRPDN For further study For further study X.l category G For further study For further study For further study Rec. X.76 For further study This Recommendation ISDN Rec. X.l, 1.230-Series Circuit-Mode 1.250-Series Packet-Mode X.301 Frame Relay 1.233 X. 1 categories S, T, U Rec. 1.530 Re
45、c. X.321 X.l category B Rec. X.325 X.l categories C, D This Recommendation Rec. X.324 SS No. 7, Rec. X.75, X.l category Y 5.2 ISDN The ISDN provides Frame Relaying, Packet Switched and/or Circuit Switched Data Transmission ServicesBearer Services as defined in Recommendations X.l, X.2 and in 1.230-S
46、eries Recommendations. NOTE 1 - Supplementary servicesoptional user facilities for the circuit-mode operation on ISDN are specified in the 1.250-Series Recommendations. Recommendation X.2 applies to ISDN Packet Switched Data Transmission Servicesh3earer Services. Supplementary services for the Frame
47、 Relaying Bearer Service (FRBS) are specified in Recommendation 1.233.1. For the provision of data transmission services, the ISDN may be accessed by DTEs/TEs by the categories of access S, T, U, as defined in Recommendation X.l and/or the access methods defined in the 1.230-Series Recommendations.
48、Inaddition, the ISDN may also be accessed via other networks, e.g. PSTN (see Recommendation I.530), CSPDN (see Recommendation X.l, category B and Recommendation X.321), PSPDN (see Recommendation X.325), MSS (Recommendation X.324), FRPDN (this Recommendation), or ISDN (SS No. 7, Recommendations X.75
49、and X.l, category Y). NOTE 2 - In the context of this Recommendation, and for the purpose of provision of data transmission services, the following categories of bearer services defined in the 1.230-Series Recommendations are considered. a) b) c) d) e) frame relaying bearer service. circuit-mode 64 kbitfs unrestricted, 8 kHz structured; circuit-mode 64 kbitfs, 8 kHz smctured, usable for speech information transfer; circuit-mode 64 kbitk, 8 Wz structured, usable for 3.1 ! virtual call and permanent virtual circuit; 5.3 Call control between FRPDN and ISDN T
