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  ______    _____    __   _     ______    ______  
 /_____//  |  ___|| | || | ||  /_   _//  /_   _// 
 `____ `   | ||__   | '--' ||   -| ||-   `-| |,-  
 /___//    | ||__   | .--. ||   _| ||_     | ||   
 `__ `     |_____|| |_|| |_||  /_____//    |_||   
 /_//      `-----`  `-`  `-`   `-----`     `-`'   
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發送短信 : Optical subcarrier multiplexed system with tandem SSB transmission