这些电路对实现一个城市电话通信网或本地通信网的全自动化接续，具有一定参考价值。
These interface circuits which realize the automatic connection of the local communication networks have a consultive value.
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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