System and method of restricting incoming calls by comparing the forwarded-from directory number to a directory number stored within the network
First Claim
1. A method for selectively blocking calls forwarded from a first terminal toward a second terminal, said method for blocking calls comprising the steps of:
- receiving an incoming call placed to said first terminal and forwarded to said second terminal;
identifying said incoming call as a forwarded incoming call by examining a redirection counter contained in a call setup signal;
retrieving, from data previously correlated, a previously stored directory number by indexing a directory number representing said second terminal, said previously stored directory number stored in a node of a wireless telecommunications network;
comparing said previously stored directory number with a forwarded-from number associated with said forwarded incoming call; and
rejecting said incoming call if said previously stored directory number matches said forwarded-from number associated with said forwarded incoming call.
1 Assignment
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Accused Products
Abstract
The present invention provides a method and apparatus for selectively restricting only forwarded calls. Upon realizing that an incoming call was incorrectly forwarded, the terminal receiving the incoming call transmits to a telecommunications exchange an indication requesting activation of a subscriber feature that will restrict only forwarded calls from the terminal forwarding the call. The directory number for the terminal forwarding the call is retrieved from a register. That retrieved directory number is correlated with the directory number representing the terminal incorrectly receiving the forwarded call and the correlated data is stored at a database. Upon the receipt of the next incoming call, the telecommunications exchange determines that the call is forwarded. Then, the directory number associated with the forwarding party is compared against the data previously correlated and stored in the database. If the directory number associated with the forwarding party matches the directory number stored in the database, the call is rejected.
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Citations
22 Claims
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1. A method for selectively blocking calls forwarded from a first terminal toward a second terminal, said method for blocking calls comprising the steps of:
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receiving an incoming call placed to said first terminal and forwarded to said second terminal; identifying said incoming call as a forwarded incoming call by examining a redirection counter contained in a call setup signal; retrieving, from data previously correlated, a previously stored directory number by indexing a directory number representing said second terminal, said previously stored directory number stored in a node of a wireless telecommunications network; comparing said previously stored directory number with a forwarded-from number associated with said forwarded incoming call; and rejecting said incoming call if said previously stored directory number matches said forwarded-from number associated with said forwarded incoming call. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A telecommunications system comprising:
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a telecommunications exchange for routing calls, forwarding calls, and selectively blocking forwarded calls; a first terminal, connected to said telecommunications exchange, for initiating a call; a second terminal, having a first directory number, said second terminal connected to said telecommunications exchange, said second terminal comprising the destination of said call initiated by said first terminal; a third terminal, having a second directory number, said third terminal connected to said telecommunications exchange, said third terminal comprising the destination of calls forwarded by said telecommunications exchange destined for said second terminal; and wherein said telecommunications exchange operates to; determine that the call initiated by said first terminal to said second terminal should be forwarded to said third terminal; examine a redirection counter contained in a call setup signal to determine whether the call was forwarded; compare said first directory number with a previously stored third directory number correlated to said second directory number in response to a determination that the call was forwarded, said third directory number identifying a terminal from which forwarded calls should be blocked; and reject forwarding of said call if said first directory number associated with said second terminal matches said previously stored third directory number. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method of activating a subscriber feature to restrict forwarded calls, said method comprising the steps of:
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storing a first directory number representing a first terminal in a first register associated with a Signal Switching Point contained within an Intelligent Network wireline telecommunications system; receiving an indication from a second terminal for activating said subscriber feature; retrieving said stored first directory number from said first register in response to receiving said indication; storing, at a second register associated with a Signal Control Point contained within said Intelligent Network, said retrieved first directory correlated number with a second directory number representing said second terminal in response to receiving said indication; and rejecting an incoming call that is forwarded from a terminal having a directory number stored in said second register. - View Dependent Claims (16, 17)
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18. A method of activating a subscriber feature to restrict forwarded calls, said method comprising the steps of:
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storing a first directory number representing a first terminal in a first register associated with an Mobile Switching Center/Visitor Location Register; receiving an indication from a second terminal for activating said subscriber feature; retrieving said stored first directory number from said first register in response to receiving said indication; storing, at a second register associated with a Home Location Register connected to said Mobile Switching Center/Visitor Location Register, said retrieved first directory number correlated with a second directory number representing said second terminal in response to receiving said indication; and rejecting an incoming call that is forwarded from a terminal having a directory number stored in said second register. - View Dependent Claims (19, 20, 21, 22)
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Specification