Security cellular telecommunications system
DCFirst Claim
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1. A method of cellular telecommunications, comprising the steps of:
- (a) establishing a pre-paid subscriber account balance linked to a pre-determined cellular telephone number assigned to a subscriber;
(b) writing the established pre-paid subscriber account balance to a database;
(c) initiating a cellular telecommunications event, by a subscriber, by the subscriber entering a dialed call destination number and transmitting the dialed call destination number as a dialed number identification system (DNIS) code and transmitting an automated number identification code (ANI) uniquely identified with a subscriber'"'"'s cellular radiotelephone;
(d) receiving the DNIS and ANI at a cellular switch, the cellular switch recognizing the ANI as belonging to a pre-paid subscriber;
(e) sending an off-hook signal from the cellular switch to a host computer;
(f) the host computer serially sending a first signal to the cellular switch to obtain the DNIS signal therefrom, receiving the first signal, sending a second signal to the cellular switch to obtain the ANI signal therefrom, and receiving the second signal at the host computer;
(g) establishing communication between the host computer and a remote server computer, the remote server computer being in communication with the subscriber database, and validating the ANI received from the cellular switch as belonging to a subscriber;
(h) validating existence of a pre-determined subscriber account balance in the subscriber database based upon the DNIS and the time of day of the telecommunications event;
(i) establishing communications between the host computer and a local exchange carrier to obtain an available telecommunications line and sending the DNIS only if an affirmative validation at step (h) occurs;
(j) checking for an off-hook condition at the DNIS destination and, upon occurrence thereof, decrementing the subscriber account balance at regular intervals during the telecommunications event until an on-hook condition exists as the DNIS destination; and
(k) disconnecting the telecommunications event at the host server upon occurrence of a negative validation at step (h) or an on-hook condition exists at step (j).
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Abstract
A cellular telecommunications system having a security feature which allows only pre-authorized users no complete cellular telephone calls. The system and method recognizes a cellular radiotelephone'"'"'s pre-programmed a pre-selected telephone number and a automated number identification code (ANI). The pre-selected telephone number is reserved to the pre-paid cellular telecommunications system. The cellular radiotelephone transmits the ANI and a dialed number identification system code (DNIS) to a cellular switch, which contacts a host computer for call validation the pre-paid service provider.
358 Citations
21 Claims
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1. A method of cellular telecommunications, comprising the steps of:
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(a) establishing a pre-paid subscriber account balance linked to a pre-determined cellular telephone number assigned to a subscriber; (b) writing the established pre-paid subscriber account balance to a database; (c) initiating a cellular telecommunications event, by a subscriber, by the subscriber entering a dialed call destination number and transmitting the dialed call destination number as a dialed number identification system (DNIS) code and transmitting an automated number identification code (ANI) uniquely identified with a subscriber'"'"'s cellular radiotelephone; (d) receiving the DNIS and ANI at a cellular switch, the cellular switch recognizing the ANI as belonging to a pre-paid subscriber; (e) sending an off-hook signal from the cellular switch to a host computer; (f) the host computer serially sending a first signal to the cellular switch to obtain the DNIS signal therefrom, receiving the first signal, sending a second signal to the cellular switch to obtain the ANI signal therefrom, and receiving the second signal at the host computer; (g) establishing communication between the host computer and a remote server computer, the remote server computer being in communication with the subscriber database, and validating the ANI received from the cellular switch as belonging to a subscriber; (h) validating existence of a pre-determined subscriber account balance in the subscriber database based upon the DNIS and the time of day of the telecommunications event; (i) establishing communications between the host computer and a local exchange carrier to obtain an available telecommunications line and sending the DNIS only if an affirmative validation at step (h) occurs; (j) checking for an off-hook condition at the DNIS destination and, upon occurrence thereof, decrementing the subscriber account balance at regular intervals during the telecommunications event until an on-hook condition exists as the DNIS destination; and (k) disconnecting the telecommunications event at the host server upon occurrence of a negative validation at step (h) or an on-hook condition exists at step (j).
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2. A cellular telecommunications system for pre-paid subscribers, said system comprising:
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(a) a plurality of cellular telephones, each cellular telephone being capable of transmitting an automated number identification code (ANI); (b) a cellular switch in communication with said plurality of cellular telephones; (c) a local exchange carrier; (d) a pre-paid service provider including (1) a host computer for providing pre-paid cellular service, said host computer being coupled to said local exchange carrier via switched lines and being coupled to said cellular switch via unswitched lines; (2) a server computer coupled to and remote from said host computer, said server computer including a database containing a plurality of records identified by ANI and representing the accounts of pre-paid subscribers, each of which accounts contains information on the balance in the account; and (3) means in said host computer for receiving a signal indicative of a pending call from said cellular switch and for forwarding the call to the local exchange carrier after confirming that the balance in the account corresponding to the ANI is greater than a predetermined minimum, whereby said cellular switch forwards calls from the pre-paid subscribers to said pre-paid service provider via said unswitched lines. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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10. A method for pre-paid cellular telephone service, said method comprising the steps of:
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forwarding to a pre-paid switching system a dialed number identification system code (DNIS) and an automated number identification code (ANI) representing a call from a cellular telephone; at the pre-paid switching system, verifying a positive balance in an account identified by the ANI; forwarding the call to an LEC; and decrementing the balance in the account at regular intervals during the call until the call is terminated or until the balance is no longer positive, whichever occurs first. - View Dependent Claims (11, 12, 13, 14)
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15. A method for pre-paid cellular telephone service, said method comprising the steps of:
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receiving an automated number identification code (ANI) representing a call at a cellular switch; at the cellular switch checking the ANI against each stored reserved pre-paid cellular telephone number identifying a pre-paid subscriber; and if the ANI is found in the stored reserved pre-paid cellular telephone numbers, then forwarding the call directly to a pre-paid service provider. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification