A convert request status indicates that the requestor has already been granted a request for the resource and is currently waiting for an upgrade to the initial request to be granted 转换请求状态指示已向请求程序授予对资源的请求，并且请求程序当前正在等待升级到要授予的初始请求。
At some point in the future , the receiver would then issue a request to the initial receiver the " callback " providing it with the full set of information requested by the initial request ; the response to this request will be another acknowledgement 然后在以后的某个时刻，接收者将会发送一个请求到初始的接收者（ “回调” ）并给它提供初始请求者所请求的全部信息；对这个请求的响应将会是另一个确认。
