BS 7267:1990
Current
The latest, up-to-date edition.
Open systems interconnection: guide to operation of an X.25 interworking unit
Hardcopy , PDF
English
31-07-1990
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Committees responsible
National foreword
Guide
1. Scope
2. Normative references
3. Abbreviations
4. General considerations
5. Procedures for restart
6. Procedures for virtual call setup and clearing
7. Procedures for data and interrupt transfer
8. Procedures for flow control
9. Procedures for reset
10 . Optional user facilities
Table
1. Categorization of optional user facilities
Figure
1. Operation of an X.25 to X.25 IWU
Defines the operation of an interworking unit for use on networks that comply with CCITT Recommendation X.25.
| Committee |
IST/6
|
| DevelopmentNote |
Also numbered as ISO/IEC TR 10029 Supersedes 89/62161 DC (09/2005)
|
| DocumentType |
Standard
|
| Pages |
12
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This Technical Report describes the function of the IWU in terms of the mapping between Protocol Data Units (PDUs) that it receives from one interface, and PDUs that it then transmits, which could be on either interface of the IWU. Additionally, this Technical Report describes the procedures that an IWU can initiate on each interface independently.
Each interface corresponds to one instance of a DTE/DXE connection, and both interfaces of the Interworking Unit operate as a DTE as specified by ISO 8208.
NOTE The term “DXE?? is used as defined in ISO 8208 meaning “...those contexts where it would not matter whether a DTE or a DCE was being referred to.??
| BS EN 60870-6-601:1995 | Telecontrol equipment and systems. Telecontrol protocols compatible with ISO standards and ITU-T recommendations Functional profile for providing the connection-oriented transport service in end system connected via permanent access to a packet switched data network |
| BS 7219:1989 | Specification for X.25 packet level protocol for data terminal equipment for information processing systems |
| ISO/IEC 8880-2:1992 | Information technology — Telecommunications and information exchange between systems — Protocol combinations to provide and support the OSI Network Service — Part 2: Provision and support of the connection-mode Network Service |
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