Token Ring is a type of a local area network (LAN) technology first thought out by an IBM developer, Olof Sderblom, in the 1960s. Its US patents were first credited in 1981 and was later promoted by IBM throughout the early 1980s. Then, it was popularized by IBM when its Token Ring architecture was founded on active multi-station access units (MSAUs or MAUs) and the IBM Structured Cabling System. The Institute of Electrical and Electronics Engineers also standardized the Token Ring as IEEE 802.5. Although very successful in its early days, with the introduction of 10-BASE-T (Ethernet) and the EIA/TIA 5638 cabling standard, its popularity and name fell by the early 1990s. IBM tried to revive it through an intense marketing campaign as it tried to outdo Ethernet in terms of performance and reliability, but was unable to match its adequately priced competition. Today, IBM no longer supports, promotes, or uses the Token Ring.
Brief History
When it was tested in 1985 by IBM, the Token Ring transmitted data at 4 Mbit/s and eventually reached the 16 Mbit/s benchmark in 1989 with the 802.5 standard being extended to support it. Apollo Computer outdid IBM in 1981 when they...
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