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ISDN在世界范围内已进入高速发展时期,中国也将迎来一个ISDN的发展高潮,本文概略地介绍了ISDN的原理、发展现状和前景。
ISDN in the world has entered a period of rapid development, China will also usher in the climax of an ISDN development, this article briefly introduces the ISDN principle, development status and prospects.