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.
本地通信网是由大量设备与链路互连组成的，其中一个部件的故障可能关联多个设备和链路，从而引发大量衍生的告警。
Local telecommunication network is connected by quite a lot of equipment and link, any default of a component may communicate with several other equipments, and cause many children alarm.
本地通信网是由大量设备与链路互连组成的，其中一个部件的故障可能关联多个设备和链路，从而引发大量衍生的告警。
Local telecommunication network is connected by quite a lot of equipment and link, any default of a component may communicate with several other equipments, and cause many children alarm.
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