Toshiba Corp has introduced an optical local area network running at 10Mbits per second and based on the IEEE 802.3 Ethernet standard: developed in conjunction with Nippon Telegraph & Telephone, it can support up to 33 channels and uses a passive optical coupler so that multiple channels do not interfere – electrical-to-optical conversion is at the device level; aiming it at the lower end of the optical network market, Toshiba hopes to sell 100 of the networks over three years.