The commercialization conditions of the global N-ISDN and the development trend of B-ISDN reveal that N-ISDN has stepped out of ebbtide and B-ISDN is entering the market.

• 本文介绍了全球N-ISDN的商用情况和B-ISDN的发展趋势,展示出N-ISDN走出低谷、B-ISDN迈向市场的美好前景。