As FTTx solution is regarded for the greatest one to access network, it completely changed people’s way of life, work and entertainment, it attracted huge concern in domestic as well as being rapidly promoted becaused its optical transmission medium has the noise-free,radiation free, strong anti-EMI ability,its telecommunication system has no limitation of bandwidth,distance,etc.. so that demand of FTTH is increasing obviously with countries growing demand for bandwidth.
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First,with the East & West Add-Drop CWDM OADM coarse wavelength optical add / drop multiplexer, one or more new access points can be added anywhere in the CWDM long-distance optical transport network without affecting other channels in the entire network. In order to improve network transmission Efficiency, WDM technology is often deployed in equipment.
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Why CWDM & DWDM combination network can be achieved
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