专利名称：EFFICIENT COMMUNICATION THROUGH
NETWORKS
申请号：EP96931959申请日：19961009公开号：EP0956711A4公开日：19991117
摘要：A method and device that interrogates the availability of a called party beforeplacing a communication from the calling party to the called party. A callback may beinitiated so that both communcations are completed simultaneously. The routing ofcommunication may take place through any one of a number of different networks and atanother time of the day, even if the caller does not otherwise have access to thosenetworks.
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