This typical application is used in a private network environment that founded behind a PABX.

这个典型应用主要用在建立在PABX上的个人网络环境中。

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This typical application is used in a private network environment that founded behind a PABX.

这个典型应用主要用在建立在PABX上的个人网络环境中。

youdao