在线状态服务器：“在线状态服务器”提供用于收集、管理和分发实时可用性和用户间的通信方法的服务。
Presence server: a "Presence server" provides the services to collect, manage and distribute the real time availability and the means for communicating among users.
oma定义的服务构建于IMS基础设施之上，如即时消息传递(Instant Messaging, IM)、在线状态服务和组管理服务等。
The services defined by OMA are built on top of IMS infrastructure, such as Instant Messaging (IM), Presence service, and Group Management service.
另外，如果ARFM认为增加处理能力可以降低排队的请求数量，它可以请求更多服务器进入在线状态。
In addition, ARFM can request additional servers to be brought online if it determines that additional capacity would reduce the amount of queuing that is occurring.
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