Add-drop multiplexer: Difference between revisions

Revision as of 15:21, 30 November 2005

Revision as of 21:44, 18 January 2006

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A recent shift in ADM technology has introduced so called '''multi-service [[SONET]]/[[SDH]]''' (also known as a multi-service provisioning platform, or [[MSPP]]) equipment which has all the capabilities of legacy ADMs, but can also include cross-connect functionality to manage multiple fiber rings in a single chassis. These new devices can replace multiple legacy ADMs and also allow connections directly from [[Ethernet]] [[LAN]]s to a service provider's optical backbone.

In the end of 2003, sales of multiservice ADMs eclipsedexceeded those of legacy ADMs for the first time, as the migrationchange to next-generation SONET/SDH networks accelerated.

An emerging variety of ADMs that is becoming popular as the carriers continue to invest in metro optical networks are [[ROADM]]s, or [[Reconfigurable Add Drop Multiplexers]].