Handover Request ACK 切换请求应答 ; 切换请求响应 ; 切换请求证实 ; 切换请求确认
ACK in request 确认在要求
Path Switch Request Ack 路径转换请求应答
Info Request Ack 信息查询确认
The ACK request needs to be configured just like the INVITE request created previously.
ACK请求需要像前面创建的INVITE请求那样配置好。
UA1 acknowledges the 200 OK response by sending an ack request to UA2, where the call was forwarded.
UA 1通过向ua2发送一次ack请求，来确认响应200 OK。
Send an immediate ACK to the customer confirming the request and supplying a confirmation number.
向客户发送即时的ACK，确认请求并提供校验码。
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