Toshiba Corp has pencilled in 1990 for the US launch of its large-scale digital PABX, which it is developing jointly with Nippon Telegraph & Telephone Corp: the software for the switch is currently being developed in both Japan and the US, at Toshiba’s Data Processing Research Centre in Kawasaki, at its Hino plant near Tokyo, and at its Irvine, California plant where it also inter alia makes push-button phones – and American engineers are developing software to conform with US requirements; the new PABX will support between 800 and 16,000 lines, and will be networkable over fibre optic links; NEC Corp and Fujitsu Ltd are already competing in the US market, and competition between the Japanese for market share is likely to intensify.