GB/T 15629.5-1996
Information technology--Local and metropolitan area networks--Part 5: Token ring access method and physical layer specifications (English Version)

Standard No.

GB/T 15629.5-1996

Language

Chinese, Available in English version

Release Date

1996

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 15629.5-1996

Scope

For the purpose of compatible interconnection of data processing equipment via a local area network (LAN) using the token ring access method, this standard: (1) defines the frame format, including delimiters, addressing, routing information, and frame inspection sequences ( FCS), allowing operation on a single ring or on multiple rings connected by source routing or transparent bridging, and introduces Media Access Control (MAC) frames, timers, counters, and priority stacks (see Chapter 3 ); (2) defines the MAC protocol. Use the text description of the algorithm to supplement the finite state machine and state table (see Chapter 4); (3) Define the physical layer (PHY) functions of symbol encoding and decoding, symbol timing, and latency buffering (see Chapter 5 ); (4) Describes the services provided by the MAC to the station management (SMT) and logical link control sublayer (LLC), and the services provided by the PHY to the SMT and MAC. These services are defined by service primitives and related parameters (see Chapter 6); (5) Define the 4Mbit/s and 16Mbit/s shielded twisted-pair connection between the station and the media, and define the media interface connector (MIC) (see Chapter 7); (6) Including the PICS form given in ISO 9646-2, in accordance with relevant requirements and guidelines (see Appendix C). It is a matter for future consideration to define the appropriate media (twisted pair, coaxial cable and fiber optics) for connecting the stations and meeting the connection standards specified here. Before these media are specified, the specifications in Clause 7 shall define the performance boundaries that an operating network, including media and trunk coupling units (TCUs), shall observe. This standard places particular emphasis on specifying the same externally visible characteristics required for compatibility, thereby avoiding unnecessary restrictions and changes to the internal design and implementation of interconnecting different processing devices. The application environment of LAN is oriented to business and light industry. While the use of Token Ring LANs in domestic and heavy industrial environments is not excluded, it was not considered during the development of this standard.

GB/T 15629.5-1996 history

• 1996 GB/T 15629.5-1996 Information technology--Local and metropolitan area networks--Part 5: Token ring access method and physical layer specifications

GB/T 15629.5-1996 -All Parts