Metropolitan Area Network

from Wikipedia, the free encyclopedia

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

literature

Web links