Title:
DEVICE FOR TRANSMITTING ATTEMPTS AT FRAUD TO A MONITORING SYSTEM OF A PUBLIC TELEPHONE NETWORK
Document Type and Number:
WIPO Patent Application WO2001017224
Kind Code:
A3
Abstract:
The invention concerns a device for transmitting to a monitoring system attempts at fraud on at least one payphone (3). A control module placed on the telephone line (1) comprises means (11) for generating a random number, means (16) for transmitting said random number to said payphone (3), and means for authenticating the payphone (3). The invention is characterised in that the means (11) generating a random number are capable of generating a specific random number, representing an anomaly in the authentication, the payphone (3) being provided with means for identifying said specific type so as to transmit to the monitoring system (4) an anomaly information.
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Inventors:
LEFOUR MARC (FR)
Application Number:
PCT/FR2000/002373
Publication Date:
August 30, 2001
Filing Date:
August 25, 2000
Export Citation:
Assignee:
SCHLUMBERGER SYSTEMS & SERVICE (FR)
LEFOUR MARC (FR)
LEFOUR MARC (FR)
International Classes:
H04M17/02; (IPC1-7): H04M17/02
Foreign References:
| US5351290A | 1994-09-27 | |||
| EP0335768A1 | 1989-10-04 | |||
| EP0468913A2 | 1992-01-29 |
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