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.
本文介球N-ISDN的商用情况和B-ISDN的发趋势,示出N-ISDN走出低谷、B-ISDN场的美好前景。
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