This article reports that a significantly low figure is obtained in calculating the facility demand-supply ratio, or capacity utilization, of the Japanese trunk line network. It also notes NTT's overwhelming shares in both volume of services and transmission facilities as well as large scale...

This article is concerned with the Integrated Services Digital Network (ISDN) in Japan. It sketches the actors involved in ISDN networks and services and gives an account of their history, current status and realistic expectations. ISDN is developing steadily in Japan but at a pace that is...