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Arrangement for intentionally blocking telephone calls to predefined destination numbers but allowing such blocking to be selectively overridden

  • US 5,109,408 A
  • Filed: 11/30/1989
  • Issued: 04/28/1992
  • Est. Priority Date: 11/30/1989
  • Status: Expired due to Term
First Claim
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1. A call processing method for use in an arrangement comprising database means and switching means, said switching means connectable to a plurality of customer stations, said switching means including memory means, said method comprisingstoring data in said memory means defining a plurality of dialing plans and defining for each of said customer stations the one of said plans to be used for calls from that customer station, said plans including a first plan defining processing of received numbers such that a query of said database means is defined when a prespecified access code is received and such that call blocking is defined when one of a predefined plurality of destination numbers is received without said prespecified access code, said plurality of plans further including a second plan defining processing received numbers such that continued call processing is defined when one of said predefined destination numbers is received,receiving information for an outgoing call from one of said customer stations,reading said stored data in said memory means to determine the one of said plans to be used for calls from said one station, andprocessing said received information in accordance with the determined dialing plan, wherein when said determined dialing plan is said first dialing plan, transmitting a query to said database means to determine further processing of said call when said received information does include said prespecified access code and one of said predefined destination numbers, and blocking said call when said received information does not include said prespecified access code but does include one of said predefined destination numbers, andafter transmitting said query, receiving a query response from said database means, andprocessing said call in accordance with said query response.

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