贝尔实验室纵横中央局交换机问世。
文章通过对局间录音通知的使用，阐述了其在西局C&C08交换机上的实施方案。
This paper expounds the implement plan of recorded announcement on switchboard C&C08 in western bureau according to its usage.
本文着重介绍市话局用户呼叫小交换机用户的全自动接续的各种接口电路方案。
This Paper introduces the interface circuits schemes of the PABX that realizes the local office subscribers to call the subscribers of PABX.
主要介绍了利用交换机现有的扫描功能，实现远端模块局机房无人执守的工作原理和方法。
This text presents principle and methods of realizing the remote monitor and control in the program control houses without workers.
本文介绍了正向设计的局用万门程控交换机专用集成电路CSC71018的可测性设计。
Design for testability of CSC71018, an application-specific IC for programmable switchboard with top-down design, is introduced in the paper.
本文介绍电话局自动电话交换设备与机关企业用自动化小交换机间全自动化接续的接口电路。
The automatic connection interface circuits between the PABX and the automatic switch equipments of telephone office are presented in this paper.
本发明体积小，输出功率大，输出波形失真小，效率高，特别适合用于大型局用程控交换机。
The present invention has small volume, large output power, less distortion in output wave form and high efficiency and is esp. suitable for large program controlled exchanger.
本发明体积小，输出功率大，输出波形失真小，效率高，特别适合用于大型局用程控交换机。
The present invention has small volume, large output power, less distortion in output wave form and high efficiency and is esp. suitable for large program controlled exchanger.
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