TOKYO--(BUSINESS WIRE)--Nippon Telegraph and Telephone Corporation (NTT, Chiyoda-ku, Tokyo, CEO: Hiroo Unoura) and Oki Electric Industry Co., Ltd. (OKI, Minato-ku, Tokyo, President Hideichi Kawasaki) have jointly developed a new technology that combines the PON technology with the wavelength and time division multiplexing technology - "WDM/TDM-PON technology." The two companies have successfully demonstrated the jointly developed optical access system featuring the WDM/TDM-PON technology in ult