IEEE 802.6

IEEE 802.6 is an ANSI standard for Metropolitan Area Networks (MAN). It is an improvement of the older Fiber Distributed Data Interface network structure ( FDDI). The disadvantage of the FDDI standards is the high cost of the implementation, and the lack of compatibility with current wireless standards. 802.6, however, uses the Distributed Queue Dual Bus Protocol ( DQDB ) for data transmission, allows transfer rates up to 150 Mbit / s and consists of two unconnected unidirectional data buses. DQDB allows a range of up to 160 km over fiber at a wavelength of 1300 nm before signal degradation begins.

Similar FDDI 802.6 comes very rarely used, mainly for the same reasons as FDDI. Most MANs therefore use Synchronous Optical Network ( SONET) or Asynchronous Transfer Mode (ATM) for data transmission.

• IEEE Standard