• This Paper introduces the interface circuits schemes of the PABX that realizes the local office subscribers to call the subscribers of PABX.

    本文着重介绍市话局用户呼叫交换机用户全自动接续的各种接口电路方案

    youdao

  • The automatic connection interface circuits between the PABX and the automatic switch equipments of telephone office are presented in this paper.

    本文介绍电话局自动电话交换设备机关企业用自动化小交换机全自动化接续接口电路

    youdao

  • The automatic connection interface circuits between the PABX and the automatic switch equipments of telephone office are presented in this paper.

    本文介绍电话局自动电话交换设备机关企业用自动化小交换机全自动化接续接口电路

    youdao

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