... circuit, voice-grade 音级电路 circuit-switched connection 电路交换连接 Circuit-Switched Network 电路交换网络 ...
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在交换系统中，同一或不同交换网络的引入线和引出线之间的连接部分或电路。
Within a switching system, a connection or circuit between inlets and outlets of the same or different switching networks.
WAN连接类型包括专线、电路交换和分封交换。
WAN connection types include leased line, circuit-switched, and packet-switched.
这就意味着目前存在的面向连接的和电路交换的网络必须升级，以便能够支持分组交换的数据业务。
This means that many of the existing connection-oriented or circuit-switched networks will need to be upgraded to support packet-switched data traffic.
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