Because you submit a SUBSCRIBE request to a group but not each member of the group, you still receive SIP NOTIFY messages whenever the group changes.
由于向组提交SUBSCRIBE请求，而不是向组的每个成员提交请求，因此仍然能在组发生更改时接收到SIPNOTIFY消息。
When you have to notify multiple object managers of an event at the same time, a publish-subscribe paradigm is best suited for your communication needs.
如果必须将一个事件同时通知多个对象管理器，那么使用发布-订阅模型是最合适的。
The 'On' method will subscribe the client to any "notify event" triggered by the server.
“对”的方法将订阅客户端的任何“通知”事件引发的服务器。
This model offers SIP Specific Event Notification to transmit DTMF, and USES SUBSCRIBE and NOTIFY to realize the control to IP phone.
该模型利用事件通告机制来传送双音多频信号，通过SUBSCRIBE和NOTIFY两个消息来实现交换机对SIP终端的完全控制。
This model offers SIP Specific Event Notification to transmit DTMF, and USES SUBSCRIBE and NOTIFY to realize the control to IP phone.
该模型利用事件通告机制来传送双音多频信号，通过SUBSCRIBE和NOTIFY两个消息来实现交换机对SIP终端的完全控制。
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