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(12) Patent Application: | (11) CA 2171076 |
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(54) English Title: | METHOD FOR PREVENTING FRAUD IN AN INBAND SIGNALLING TELEPHONY SYSTEM AND TRUNK MODULE REALIZING SUCH A METHOD |
(54) French Title: | METHODE POUR EMPECHER LES FRAUDES DANS LES SYSTEMES TELEPHONIQUES A SIGNALISATION INTRABANDE ET MODULE DE LIAISON UTILISANT CETTE METHODE |
Status: | Deemed Abandoned and Beyond the Period of Reinstatement - Pending Response to Notice of Disregarded Communication |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | ROBIC AGENCE PI S.E.C./ROBIC IP AGENCY LP |
(74) Associate agent: | |
(45) Issued: | |
(22) Filed Date: | 1996-03-05 |
(41) Open to Public Inspection: | 1996-09-28 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | ||||||
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The disclosed method prevents fraud in an inband
signalling telephony system, such as a No. 5 signalling
system. It includes a first step of detecting a fraudulent
inband signal at a predetermined location of an outgoing
signal path between an input terminal Os and an output
terminal Oss of a trunk module T included in the inband
signalling telephony system. The predetermined location is
situated between the input terminal Os and an injection
terminal I of the outgoing signal path where an inband
signal can be injected. In a second step, the fraudulent
inband signal is removed from the outgoing signal path by
interrupting this path during a time interval at least
equal to the duration of the inband signal.
The trunk module realizing this method includes a
receiver similar to the receivers used in the inband
signalling path of the trunk module to detect incomming
inband signals and to filter these out before transmitting
the signal to a user station connected to the trunk module.
This receiver is coupled betwwen the above mentioned input
terminal Os and the injection terminal I.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
2024-08-01:As part of the Next Generation Patents (NGP) transition, the Canadian Patents Database (CPD) now contains a more detailed Event History, which replicates the Event Log of our new back-office solution.
Please note that "Inactive:" events refers to events no longer in use in our new back-office solution.
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Description | Date |
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Inactive: IPC from MCD | 2006-03-12 |
Inactive: IPC from MCD | 2006-03-12 |
Inactive: IPC from MCD | 2006-03-12 |
Inactive: IPC from MCD | 2006-03-12 |
Inactive: IPC from MCD | 2006-03-12 |
Time Limit for Reversal Expired | 1999-03-05 |
Application Not Reinstated by Deadline | 1999-03-05 |
Deemed Abandoned - Failure to Respond to Maintenance Fee Notice | 1998-03-05 |
Application Published (Open to Public Inspection) | 1996-09-28 |
Abandonment Date | Reason | Reinstatement Date |
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1998-03-05 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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ALCATEL N.V. |
Past Owners on Record |
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MARCEL DEVOS |