Technical requirements for toll manual switching equipment 长途人工电话交换设备.技术要求
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Methods of test for toll manual telephone switching equipment 长途人工电话交换设备.测试方法
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Interactive telephones human telephone operators will be sharply replaced by talking computers 交互式电话交互式计算机将很快取代人工电话接线员。
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Supporting engineers to manage all switching equipment of different models or from various suppliers depending on the uniform platform . 2 在统一的平台上,实现对多厂商、多类型无绳式人工电话交换设备的集中统一管理。