IEEE defines the IEEE 802.5/ ISO 8802.5 standard for Token Ring as a baseband transmission systemon STP cable with data rates of 1 Mbit/s and 4 Mbit/s, and on coaxial cable with 4 Mbit/s, 20 Mbit/s and 40 Mbit/s.
IBM supports the standardized method with 4 Mbit/s and its own variant with 16 Mbit/s on a mixture of STP and fiber optic.
Only a November 1988 addition to the IEEE standard has covered the 4/16 Mbit/s operation, Logical Link Control( LLC) Type 3 support, early token release procedures, station management, and management entity specification. Other topics include Voice Grade Media( UTP), Reconfiguration, Mutiple Rings, Conformance Testing, and Fiber Optics
802.5c-19 91, Supplement to IEEE Std 802.5-1989, Local and Metropolitan Area Networks: Recommended Practice for Dual Ring Operation with Wrapback Reconfiguration
802.5e, Token Ring Station Management Entity Specifications.
802.5j-1997, Supplement to Information Technology -Telecommunications and Information Exchange between Systems - Local Area Network( LAN) and Metropolitan Area Network( MAN) - Specific Requirements Part 5: Token Ring Access Method and Physical Layer Specifications Fibre Optic Media Requirements.
802.5r-1997, Standard for Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Specific requirements - Part 5: Token ring access method and physical layer specifications--Dedicated Token Ring Operation
802.5t, Supplement to ISO/ IEC 8802-5: 1995 Specific requirements--Part 5: Token ring access method and physical layer specifications - 100 Mbit/s Dedicated Token Ring Operation Over 2-Pair Cabling
802.5u, Supplement to ISO/IEC 8802-5: 1995 Specific requirements - Part 5: Token ring access method and physical layer specifications - 100 Mbit/s Dedicated Token Ring Operation Over Multi- mode Fibre
802.5v, Supplement to ISO/IEC 8802-5: 1995, Specific requirements - Part 5: Token ring access method and physical layer specifications. Media access control parameters, physical layers, and management parameters for 1000 Mbit/s operation or above.
RFC 1231 IEEE 802.5 Token Ring MIB
The 802.5 working group is no longer active.