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    • 6. 发明授权
    • Call waiting response status
    • 呼叫等待响应状态
    • US06577722B1
    • 2003-06-10
    • US09167330
    • 1998-10-07
    • Robert Alan Lippincott
    • Robert Alan Lippincott
    • H04M342
    • H04M3/428H04M3/02H04M3/42042H04M3/42059H04M3/436H04M19/02H04M2203/2011H04M2242/22H04Q2213/173H04Q2213/18
    • A method to handle an incoming call to a target telephone that is engaged in a present call. A first signal to the target telephone indicates an incoming call, and a second signal to the calling telephone indicates that the target telephone is busy. Another method issues a first signal to a target telephone to indicate an incoming call. A ringback tone is issued to the calling telephone causing a speaker of the calling telephone to provide a ringing sound to the caller. A switch-hook signal from the target telephone indicates a desire of a user of the target telephone to place a party to the present call on hold, and to connect to the incoming call. A busy signal, is issued to the calling telephone causing its speaker to provide a busy sound if the switch-hook signal is not received by the time a variable reaches a predetermined limit.
    • 一种处理来自当前呼叫的目标电话的呼入的方法。 到目标电话的第一信号指示来电,并且向主叫电话的第二信号指示目标电话正忙。 另一种方法向目标电话发出第一信号以指示来电。 向呼叫电话发出回铃音,导致呼叫电话的扬声器向呼叫者提供振铃声。 来自目标电话的切换信号指示目标电话的用户希望将当前呼叫的一方当作保持,并且连接到来电。 如果在变量达到预定极限时没有接收到切换挂钩信号,则向呼叫电话发出忙信号,导致其扬声器提供繁忙的声音。