• 综合业务数字网(ISDN)是综合数字延伸,它打破了传统电话网数据网之间界限,扩展了网络业务使用类型和范围。

    As extension of IDN network, ISDN has broken the ambit between the traditional telephone network and data network, expanded the application types and scope of network operation.

    youdao

  • 综合业务数字网(ISDN)是综合数字延伸,它打破了传统电话网数据网之间界限,扩展了网络业务使用类型和范围。

    As extension of IDN network, ISDN has broken the ambit between the traditional telephone network and data network, expanded the application types and scope of network operation.

    youdao

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