CAN/CSA-ISO/IEC 8802-5:02 (R2011)

This National Standard of Canada is equivalent to International Standard ISO/IEC 8802-5:1998 / ANSI/IEEE 802.5:1998 (third edition, 1998-09-15). 1.1 Scope For the purpose of compatible interconnection of data processing equipment via a local area network(LAN) using the token ring access method, this part of ISO/IEC 8802 a)Provides a general description of the token ring local area network (LAN) architecture (clause 2); b)Defines the frame format, including the delimiters, address fields, information field, and frame-check sequence (FCS). Defines the Medium Access Control (MAC) frames, timers, and error counters (clause 3); c)Defines the MAC protocols including finite state machines and state tables (clause 4); d)Defines the system level Physical layer (PHY) signaling specifications that are specific to a ring station (clause 5); e>Defines the managed objects necessary to manage the service and protocol elements that are involved in the management of a token ring station (clause 6); f)Defines the PHY station attachment specification for 4 and 16 Mbit/s operation. This includes the transmitter, receiver, medium interface connector, and transmission channel for both shieldedtwisted pair (STP) and unshielded twisted pair (UTP) media (clause 7); g>Defines the concentrator, incorporating multiple trunk coupling units (TCUs), for the attachment of a group of stations to the ring (clause 8); h)Includes the protocol implementation conformance statement (PICS) proforma in compliance with the relevant requirements, and in accordance with the relevant guidance, given in ISO/IEC 9646-2 : 1994. (annex A); i)Includes channel design examples and formulas for calculating cabling and concentrator system configurations (annex B); j)Describes jitter components and provides an example of jitter buildup using a phase lock loop recovery circuit (annex C); k)Provides informative transmitter filter design example (annex D); 1)Provides recommended guidelines for safety and operating environments (annex E); m)Illustrates the MAC finite state machines in a notation similar to that used in lSO/IEC 8802-5 : 1992 (annex F); n)Describes major improvements made after the first edition of the standard (annex G); o>Provides a sample algorithm for the parsing of MAC frames (annex H); p)Provides recommendations for the use of token ring access priorities to support multimedia traffic (annex I); q)Provides bit error rate (BER) criteria for lobe media testing (annex P).