Patent ID: 7400829
Filing Date: 2008-07-15
Classification: H04B,H04J

Abstract:
1. A transmission apparatus that receives an optical signal by selecting any one of a plurality of provided optical signal transmission paths through protection control, comprising: a plurality of optical signal outputting sections that output the optical signals transmitted through said plurality of optical signal transmission paths respectively as optical signals having wavelengths that are different from each other; a wavelength selective optical switch capable of selectively outputting light of a wavelength corresponding to any one of the optical signals coming from the plurality of optical signal outputting sections on the basis of the frequency of a controlling frequency signal; an optical switch controlling section that supplies said controlling frequency signal to the wavelength selective optical switch so as to output the optical signal coming from the optical signal transmission path side that is selected by said protection control among the optical signals coming from the optical signal outputting sections; and a frequency detecting section that detects the frequency of said controlling frequency signal.