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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク wavelength division multiplexing ： FOLDOC wavelength division multiplexing (WDM) Multiplexing several Optical Carrier n signals on a single optical fibre by using different wavelengths (colours) of laser light to carry different signals. The device that joins the signals together is known as a multiplexor, and the one that splits them apart is a {demultiplexor}. With the right type of fibre you can have a device that does both and that ought to be called a "mudem" but isn't. The first WDM systems combined two signals and appeared around 1985. Modern systems can handle up to 128 signals and can expand a basic 9.6 Gbps fibre system to a capacity of over 1000 Gbps. WDM systems are popular with telecommunications companies because they allow them to expand the capacity of their fibre networks without digging up the road again. All they have to do is to upgrade the (de)multiplexors at each end. However these systems are expensive and complicated to run. There is currently no standard, which スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.