Synchronous software's for serial interface and network interface are developed according to the access methods of exchangers in network management system.

根据网管系统的交换机接入方式，分别开发了串口同步程序和网口同步程序。

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So the factories are asked to provide united interface called north bound interface which faces higher level network management system in their peculiar network management systems.

这就要求各个厂商在自己特有的网管管理系统中，提供面向上级网络管理系统的统一接口，即北向接口。

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So the factories are asked to provide united interface called north bound interface which faces higher level network management system in their peculiar network management systems.

这就要求各个厂商在自己特有的网管管理系统中，提供面向上级网络管理系统的统一接口，即北向接口。

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