BS 4505-1:1981
Current
The latest, up-to-date edition.
Digital data transmission Specification for basic mode control procedures
Hardcopy , PDF
English
30-11-1981
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National foreword
Cooperating organizations
Specification
0. Introduction
1. Scope and field of application
2. Definitions of the transmission control characters
3. Message formats
4. Description of phases
5. Description of use of the transmission control
characters
Annexes
A. Definitions
B. Extensions of transmission control functions using
DLE sequences
C. Alternative positive acknowledgement option
Table of phases
Figures
1. Phase linkage diagram
2. Phase 2 - Establishment of data link
3. Phase 3 - Information transfer
4. Phase 4 - Termination
Specifies the implementation of the ISO/CCITT 7-bit coded character set for information interchange on data transmission channels and defines formats of the transmitted messages and supervisory sequences which are part of the transmission control procedures.
| Committee |
IST/6
|
| DevelopmentNote |
Also numbered as ISO 1745 Supersedes 81/60118 DC (08/2005)
|
| DocumentType |
Standard
|
| Pages |
26
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
1.1 General
This International Standard specifies the method of implementation of the ISO/CCITT 7-bit coded character set1) for information interchange on data transmission channels. It also defines the formats of the transmitted messages and the supervisory sequences which are part of the transmission control procedures. It covers the majority of existing data transmission systems and data link configurations used in conjunction with data processing systems.
These control procedures deal with transmission over one link at a time and do not describe the operation of data links in “tandem??. They relate to the class of control procedures which is known as the basic mode and apply at the interface between data communication equipment and data terminal equipment.
| BS 4505-7:1976 | Digital data transmission Basic mode control procedures; conversational information message transer |
| BS 3527:1962 | Glossary of terms used in automatic processing |
| BS 4505-2:1969 | Specification for digital data transmission. Character structure for start/stop and synchronous transmission |
| BS 4730:1974 | Specification for the United Kingdom 7-bit data code (ISO-7-UK) |
| BS 4505-4:1971 | Digital data transmission Basic mode control procedures. Code independent information transfer |
| BS 4505-6:1976 | Digital data transmission Complements to the basic mode control procedures; recovery, abort and interrupt, multiple station selection |
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