Teleconferencing is in its infancy in the US and Europe, but in Japan, it is already big business, with Fujitsu, Hitachi, NEC, Matsushita and Mitsubishi all playing: now NTT and Sony have linked up to market inter company image communication systems; the Sony-NTT system is expected to be use NTT’s high-speed digital lines, running at 384Kbps to 1.5Mbps, and as well as up to four transportable models, the partners will take custom orders.