Add-drop multiplexer: Difference between revisions

Revision as of 02:39, 25 November 2010

Revision as of 15:33, 19 September 2011

Line 7:

| url = http://www.maxim-ic.com/glossary/index.cfm/Ac/V/ID/8/Tm/ADM }}</ref>

ADMs can be used both in long-haul core networks and in shorter-distance "[[Metropolitan area|metro]]" networks, although the former are much more expensive due to the difficulty of scaling the technology to the high data rates and [[wavelength division multiplexing|dense wavelength division multiplexing]] (DWDM) used for long-haul communications. The main optical filtering technology used in add-drop multiplexers is the [[Fabry-PérotFabry–Pérot etalon]].

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.