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    • 7. 发明授权
    • Robocall screening
    • US11601547B2
    • 2023-03-07
    • US16940804
    • 2020-07-28
    • XCAST LABS, INC.
    • Vladimir Smelyansky
    • H04M3/42H04W4/16
    • Embodiments may provide techniques to screen for, detect, and prevent connection of robocalls. For example, in an embodiment, a method, implemented in a computer system comprising a processor, memory accessible by the processor, and computer program instructions stored in the memory and executable by the processor, may comprise receiving, at a telecommunications switch, a request to initiate a call from an originating party, selecting, at the telecommunications switch, from a list of terminating carrier networks, a media server, routing, at the telecommunications switch, the request to initiate the call to the media server, forwarding, from the media server, a media prompt requesting the originating party to enter a response to the media prompt, and when the originating party does not enter a correct response to the media prompt, forwarding, from the media server, an indication that the call is forbidden.