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

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).