Metropolitan Area Network

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A Metropolitan Area Network  ( MAN ) is a broadband telecommunications network .

Usually, a MAN connects numerous local area networks and uses a backbone technology for this purpose , which is usually implemented using fiber optic technology. A MAN can extend up to 100 km.

MANs are often set up by international telecommunications companies that network metropolises wired via MAN in a wide area network  (WAN) nationally or in a global area network  (GAN) internationally.

In Germany an appropriate power under the name was Datex-M from Deutsche Telekom in 1992 put into operation, which used the so-called SMDS technology ( switched multi-megabit Data Service ). At the end of 2002 , Deutsche Telekom metropolitan area networks were in operation in Berlin , Düsseldorf , Frankfurt am Main , Hamburg , Hanover , Cologne , Munich and Stuttgart . At this point in time, 26 German cities were already integrated into pan-European GANs.

In the meantime, almost all major German cities have networks that use technology other than SMDS technology, which connect the city districts with a wide variety of network topologies that have a high office density. In addition to the former monopoly owner Deutsche Telekom, there are around 20 other network operators in Germany (as of 2004 ) who have laid fiber-optic networks for this purpose , now preferably in the synchronous digital hierarchy (SDH) technology.

Metro Ethernet is a special technology for fiber optic networks in the metro area .

IEEE 802.16 has developed a standard for Wireless Metropolitan Area Networks (WMAN), which is established and used under the name WiMAX (Worldwide Interoperability for Microwave Access).

Individual evidence

  1. IEEE 802.16 Working Group on Broadband Wireless Access Standards ( Memento August 4, 2005 in the Internet Archive ) developing the IEEE 802.16 WirelessMAN® Standard for Wireless Metropolitan Area Networks


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