Patent ID: 7725030

Claim:
A subscriber connection apparatus connected to a central office side apparatus through a splitter and communicating data with the central office side apparatus by using a pair of optical signals having wavelengths different from that allocated to the other subscriber connection apparatuses having been connected to the central office side apparatus, comprising: a variable wavelength filter to which optical signals transmitted from said office side apparatus are inputted; an optical transmitter variable with respect to its optical signal wavelength; and a control unit for transmitting to said central office side apparatus a first message requesting allocation of a pair of a first wavelength and a second wavelength, setting the wavelength of said variable wavelength filter to the first wavelength designated in a second message transmitted from said central office side apparatus in response to said first message, and setting the wavelength of said optical transmitter to the second wavelength designated in the second message, thereby performing data transmission and reception by continuously occupying the first and second wavelengths as dedicated wavelengths while the subscriber connection apparatus is in an operating state.