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.
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