Interfaces: the interfaces between the stations and the network, referred to in the phone system as the local loops.
接口：站与网络间的接口，在电话系统中称为本地环路。
Through those local loops multiple users compete for limited core network resources on demand and as available, with each switch serving as a point of contention.
通过这些本地环路，多个用户按需竞争有限的核心网络资源。
Through those local loops multiple users compete for limited core network resources on demand and as available, with each switch serving as a point of contention.
通过这些本地环路，多个用户按需竞争有限的核心网络资源。
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