A dishwasher includes a cabinet defining a washing chamber, a door for closing an opening of the washing chamber and a fan for exhausting moist air from the washing chamber. Accordingly, a WDM-PON system having a function of realizing a cost-effective optical wavelength alignment can be provided. And, the requesting Non-AP QSTA receives a TDLS setup response frame via the AP from the intended peer station in response to the TDLS setup request frame.