# US 5,351,290 A · Telecommunications fraud prevention system and method

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- Number: US 5,351,290 A
- Document ID: US5351290A
- Status: Granted
- Kind: A
- Application number: 07/944,166
- Filed: 1992-09-11
- Granted: 1994-09-27
- Earliest claimed: 1992-09-11
- Assignees: Intellicall, Inc.
- Inventors: Abdolreza S. Naeini; Lindsey D. Owen; Harold E. A. Hansen
- Web page: https://patentgrep.com/patent/US5351290A

## CPC

- H04M 15/47: {Fraud detection or prevention means}
- H04M 15/00: Arrangements for metering, time-control or time indication {; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP}
- H04M 15/90: {using Intelligent Networks [IN] or Advanced Intelligent Networks [AIN]}
- H04M 17/00: Prepayment {of wireline communication systems, wireless communication systems or} telephone systems (using a coded card to authorise calls from a telephone set H04M1/675)
- H04Q 3/0029: {Provisions for intelligent networking}
- H04M 2215/0148: Fraud detection or prevention means
- H04M 2215/016: Billing using Intelligent Networks [IN] or Advanced Intelligent Networks [AIN]
- H04Q 2213/13535: distributed systems - also domains in service creation
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W)

## Abstract

A fraud prevention system and method are provided which utilize communication between an intelligent network platform 14 and a local telecommunications device 10. The local telecommunications device 10 comprises a memory 20 which stores various data values. Intelligent network platform 14 comprises a memory 22 which stores a copy of the values in memory 20. The intelligent network platform 14 randomly generates an address which is transmitted to the local telecommunications device 10. The local telecommunications device 10 retrieves data located at the address and transmits the data to the intelligent network platform 14 as an access string prior to the placement of telephone calls using the intelligent network platform 14. The time and day of the telephone call may also be included in the access string to prevent signals recorded at one time from being used to place telephone calls at another time.

## Claims

### Claim 1

A system for processing a telephone call from a local telecommunications device through a telecommunications network comprising a network peripheral system, the system comprising:
circuitry associated with the local telecommunications device for receiving a destination telephone number from a patron of the local telecommunications device;
circuitry for establishing a communication path between the local telecommunications device and the network peripheral system through the telecommunications network;
circuitry associated with the network peripheral system for generating a random address value;
circuitry for transmitting said address value to the local telecommunications device through said communication path;
circuitry for accessing first data stored in the local telecommunications device using said address value received from the network peripheral system;
circuitry for transmitting said first data from the local telecommunications device to the network peripheral system using said communication path;
circuitry for accessing second data stored in the network peripheral system using said address value;
circuitry for comparing said first and second data in the network peripheral system;
circuitry for placing the telephone call using said destination number responsive to said circuitry for comparing, a valid comparison by said circuitry for comparing indicating an authorized use by the local telecommunications device of the network peripheral system;
circuitry associated with the local telecommunications device for transmitting the time the call is placed to the network peripheral system through said communications path; and
circuitry associated with the network peripheral system for comparing the time received from the local telecommunications devices to the actual time of the call, said circuitry for placing the telephone call additionally responsive to said circuitry for comparing the time prior to placement of the call such that signals transmitted between a local telecommunications device and a network peripheral system recorded at one time may not be used to place calls using the network peripheral system at a later time.

### Claim 2

A method for processing a telephone call from a local telecommunications device through a telecommunications network comprising a network peripheral system, the method comprising the steps of:
receiving a destination telephone number from a patron of the local telecommunications device;
establishing a communication path between the local telecommunications device and the network peripheral system through the telecommunications network;
generating a random address value in the network peripheral system;
transmitting the address value to the local telecommunications device through the communication path;
accessing first data stored in the local telecommunications device using the address value received from the network peripheral system;
transmitting the first data from the local telecommunications device to the network peripheral system using the communication path;
accessing second data stored in the network peripheral system using the address value;
comparing the first and second data in the network peripheral system;
placing the telephone call using the destination number responsive to said step of comparing, a valid comparison indicating an authorized use by the local telecommunications device of the network peripheral system;
transmitting the time the call is placed from the local telecommunications device to the network peripheral system through said communications path; and
comparing the time received from the local telecommunications devices to the actual time of the call, said step of placing the telephone call additionally responsive to said step of comparing the time prior to placement of the call such that signals transmitted between a local telecommunications device and a network peripheral system recorded at one time may not be used to place calls through the network peripheral system at a later time.