| 释义 |
service circuit 服务电路 An auxiliary circuit connected through the switching network of a switching system to lines or trunks as required. It performs a specialized function such as dialpulse reception. 一种辅助电路,按需要通过交换系统的交换网连接到线路或中继线上去,用于执行某种专门的功能,如接收拨号脉冲。 |