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EP1958298B1 - Interruption device for a data communication line - Google Patents

Interruption device for a data communication line Download PDF

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Publication number
EP1958298B1
EP1958298B1 EP06842211A EP06842211A EP1958298B1 EP 1958298 B1 EP1958298 B1 EP 1958298B1 EP 06842211 A EP06842211 A EP 06842211A EP 06842211 A EP06842211 A EP 06842211A EP 1958298 B1 EP1958298 B1 EP 1958298B1
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EP
European Patent Office
Prior art keywords
group
wire
interruption device
communication line
cables
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EP06842211A
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German (de)
French (fr)
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EP1958298A2 (en
Inventor
Christian LAUTENSCHLÄGER
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Individual
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Individual
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Publication of EP1958298A2 publication Critical patent/EP1958298A2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/71—Contact members of coupling parts operating as switch, e.g. linear or rotational movement required after mechanical engagement of coupling part to establish electrical connection

Definitions

  • the present invention relates to a device for interrupting a communication line, more particularly a line transmitting computer data between a computer and a computer network.
  • Such a device is described for example in the document WO 03/010627 . It allows the user to physically break the link between the computer and the network to, in particular, protect the computer against computer attacks from the network.
  • the document DE 102 13 351 describes a device for interrupting a data line connected to a computer and powered by the latter to close or open according to the state, active or standby, of the computer.
  • a computer With broadband connections such as DSL, SDSL, etc., a computer can remain permanently connected to the Internet, exposing it to malicious computer intrusions.
  • Existing software such as firewall, anti-intrusion or anti-virus provide security but are far from being an absolute protection. Interrupting the physical link between the network and the computer when the latter is not used to exchange data is a very effective complement of protection.
  • interrupt devices used for this purpose nevertheless have a major disadvantage: they do not take into account the fact that the same data communication line can be used to transmit signals independent of each other, that is to say signals concerning different applications and / or from or intended for different networks.
  • communication lines meeting the RJ45 standard include different functional groups of wires, one of which is intended for transmitting computer data and another for transmitting telephone signals.
  • the present invention aims to overcome this drawback and proposes for this purpose an interruption device according to claim 1 or 2 appended, a communication line according to claim 9 or 10, a computer network according to claim 14 and a method of An interrupt according to claim 15, particular embodiments of the invention being defined in the dependent claims.
  • a device for interrupting a communication line comprises a housing 2 having on one of its faces two input / output jacks 3, 4.
  • the input jacks / output 3, 4 are intended to receive respectively two cables 5, 6, allowing these cables 5, 6 to be connected in series.
  • the cables 5, 6 define, with the interruption device 1, said communication line.
  • the input / output jacks 3, 4 and the cables 5, 6 are of the RJ45 type.
  • the cables 5, 6 thus each comprise a first group of wires 7a, composed of two pairs of son called “orange pair” 7c and "green pair” 7d, and a second group of son 7b, composed of two other pairs of said son. "Blue pair” 7th and "brown pair” 7f.
  • the first and second son groups 7a, 7b are intended to transmit respective signals independent of each other. More precisely, the first group of wires 7a is intended to transmit computer data and the blue pair 7e of the second group of wires 7b to transmit telephone signals (voice signals).
  • the brown pair 7f of the second group of son 7b is, for its part, not yet used in the RJ45 standard.
  • the wires of the cables 5, 6 are not necessarily arranged as illustrated in FIG. figure 2 ; they are usually twisted and the pairs can be intertwined at the sockets 3, 4.
  • the interruption device 1 comprises switches 8, of which there are four in the illustrated example, each connected between the input / output jacks 3, 4, more precisely between a respective electrical contact 9 of the socket 3 and a respective electrical contact 10 of the socket 4.
  • These switches 8 are respectively associated with the son of the first group 7a of each of the cables 5, 6 and are operable simultaneously from outside the housing 2 by means of a manual control member 11 provided on one of the faces of the housing 2.
  • the switches 8 can thus take, together, a closed position in which, when the cables 5, 6 are connected to the device of 1, more precisely to the electrical contacts 9, 10 of the sockets 3, 4, the son of the first group 7a of the cable 5 are respectively connected to the corresponding son of the first group 7a of the cable 6, allowing the exchange of C between the cables 5, 6 through the housing 2, and a open position (shown in figure 2 ) in which the wires of the first group 7a of the cable 5 are disconnected from the wires of the first group 7a of the cable 6.
  • the interruption device 1 also comprises, inside the housing 2, transmission means consisting of conductors 12, four in number in the illustrated example, each connected between the input / output jacks 3, 4, more precisely between a respective electrical contact 9 of the receptacle 3 and a respective electrical contact 10 of the receptacle 4.
  • These conductors 12 are respectively associated with the wires of the second group 7b of each of the cables 5, 6. 5, 6 are connected to the interruption device 1, these conductors 12 respectively connect the son of the second group 7b of the cable 5 to the corresponding son of the second group 7b of the cable 6, without interruption possible.
  • the inside of the interruption device 1 according to the invention, comprising the switches 8 and the conductors 12, is preferably made in the form of a printed circuit.
  • the interruption device 1 thus allows the interruption of the data communications between the cables 5, 6, while allowing the possible signals, independent of said data, transmitted by the second group of wires 7b of the cables 5, to pass through, 6. More particularly, in the case of the RJ45 standard, the telephone signals transmitted by the blue pair 7e of the second group of wires 7b can continue to be exchanged through the housing 2 when the exchange of data transmitted by the first group of son 7a is interrupted.
  • the figure 3 shows an example of a computer system in which the interruption device 1 according to the invention can be used.
  • This system comprises a local computer network 13, for example Ethernet type, comprising a number of computers interconnected by RJ45 wiring. At least one of these computers, indicated by the mark 14, is connected to the rest of the network 13 by a communication line as illustrated in FIG. figure 2 , that is to say that an interruption device 1 according to the invention is connected between this computer 14 and the corresponding network socket 15 by cables 16 RJ45 type.
  • the network local computer 13 may be connected to one or more other networks, computer or not, such as a global computer network 17 (Internet), a switched telephone network 18 and another local computer network 19.
  • the link between the local computer network 13 and the Internet 17 is typically via a DSL modem and that between the local computer network 13 and the other local computer network 19 through a proprietary line.
  • the switched telephone network 18 it can be connected to a local switch from which lines of telephone connected to a patch panel of the local computer network 13, patch panel which is connected to the different network jacks of the local computer network 13 by RJ45 cables.
  • the first group of wires of each of the RJ45 cables of the local computer network 13 serves to transmit the computer data exchanged between them computers of the local network 13 as well as the computer data exchanged between these computers and the Internet network 17.
  • second group of son can be used to transmit the computer data exchanged between the computers of the local computer network 13 and the computers of the other local computer network 19.
  • the second group of son RJ45 cables connected between the patch panel and network jacks can be used to transmit telephone signals, to enable conventional telephones connected to network jacks 21 of the local computer network 13 to communicate with the switched telephone network 18.
  • the interruption device 1 is placed next to the computer 14 to be made easily accessible to the user of the computer 14.
  • the user can thus interrupt at will the physical link defined by the first group of son cables 16 connecting the computer 14 to the network jack 15, by a simple operation of the manual control member 11, to protect the computer 14 against possible computer intrusions from the network Internet 17 or even from the local network 13.
  • the user can in particular trigger such an interruption when the computer 14 is not used or is used but not to exchange data with the networks 13, 17. Other reasons may cause the user to open the switches 8 of the interrupt device 1.
  • the transmission of telephone signals or computer data associated with the local network 19 in the second group of wires of the cables 16 is not affected by the opening of the switches 8 of the interruption device 1.
  • the telephone signals can continue to be exchanged, via the patch panel of the local computer network 13, between the switched telephone network 18 and a telephone 22 connected via an RJ45 socket to the input / output socket of the device.
  • the computer 14 can continue to exchange data with the local computer network 19.
  • the latter possibility is of interest, in particular when, for certain reasons, it is imperative that the computer 1 be connected to the computer.
  • computer 14 remains permanently connected to the local network 19 or when the data exchange with this local network 19 is considered sufficiently secure .
  • the data exchanged between the computers of the local network 13 and the Internet 17 could be transmitted by the first group of wires of the RJ45 cables of the local network 13 and the data exchanged between the computers of the local network 13 by the second group of sons.
  • the interruption device 1 would protect the computer 14 against computer intrusions from the Internet 17 while allowing the data exchanged between the computer 14 and the other computers of the local network 13 to pass.
  • the figure 4 shows another example of a computer system in which the interruption device 1 according to the invention can be used.
  • This system comprises a switched telephone network 23, a global computer network (Internet) 24 connected to the switched telephone network 23, an ADSL modem 25, a first input / output socket 26 is connected to the switched telephone network 23 via a telephone jack 27 and a telephone cable 28, an interruption device 1 according to the invention, a first input / output socket 29 is connected to a second input / output socket 30 of the modem 25 by a RJ45 type cable 31, and a computer 32 connected to a second input / output jack 33 of the interruption device 1 by a cable RJ45 type 34.
  • the first group of wires of the cables 31, 34 transmits the data exchanged with the Internet network 24.
  • a cable 25a of the telephone or RJ45 type directly connects the telephone socket 27 to the first socket.
  • input / output 29 of the interrupt device 1 to allow the exchange of telephone signals between the switched telephone network 23 and a telephone 35 connected to the second socket 33 of the interruption device 1 via a power strip, signals phone that the modem 25 can not handle.
  • An opening of the switches 8 of the interrupt device 1 to protect the computer 32 against cyber attacks from the Internet 24 will not affect the communications between the telephone 35 and the switched telephone network 23.
  • the figure 5 shows an interruption device 1a according to a second embodiment of the invention.
  • This second embodiment differs from the embodiment illustrated in FIGS. Figures 1 and 2 in that one of the two input / output jacks 3, 4, in this case jack 4, is replaced by two RJ45 jacks distinct 4a, 4b.
  • the socket 4a is connected inside the housing 2a to the switches 8 and internal conductors 12a corresponding to the pairs of orange 7c, green 7d and brown 7f son and is intended to be connected externally to a computer by the cable 6, while the Another socket 4b is connected inside the housing 2a only to the two inner conductors 12a corresponding to the blue pair of wires 7e and serves as a telephone jack for receiving a plug of a third cable 6a.
  • This embodiment avoids the use of a power strip to connect both a computer and a phone on the interruption device.
  • the socket 4b could be a jack specifically designed for the phone, such as an RJ11 jack.
  • the figure 6 shows an interruption device 1b according to a third embodiment of the invention.
  • This embodiment differs from the embodiment illustrated in FIG. figure 5 in that the internal conductors 12b corresponding to the pair of brown wires 7f are connected inside the housing 2b between the socket 3 and the socket 4b. Since the socket 4a is connected inside the housing 2b only to the switches 8, the cable 6 connected to this socket could, as a variant, have only the first group of wires 7c-7d.
  • the figure 7 shows an interruption device 1c according to a fourth embodiment of the invention.
  • the interruption device 1c comprises, inside the housing 2c, a circuit 36 for detecting the data rate in the first group of wires 7a, and on an outer face of the housing 2c, an electroluminescent diode 37 connected to the circuit 36.
  • the circuit 36 is of a type known per se. It is connected between the four switches 8 and one, 4, the input / output jacks 3, 4 and controls the flashing of the light emitting diode 37 according to the detected data rate.
  • An abnormally high rate may be the sign that a computer intrusion is in progress. The user can then immediately stop the intrusion by opening the switches 8 of the interruption device.
  • the figure 8 shows an interruption device 1d according to a fifth embodiment of the invention.
  • the switches 8d of the interruption device 1d are relays controlled by a remote electrical source 38, such as a lighting switch, an alarm or an electric lock.
  • the switches 8d can thus be automatically opened when the user leaves the room in which the interruption device 1d and the computer connected to it are located, more specifically when he switches off the lighting of the room, activates an alarm or close an electric lock giving access to the room.
  • the interruption devices 1a, 1b and 1d according to the second, third and fifth embodiments of the invention could also be provided with a data rate detection circuit and a light emitting diode.
  • the present invention can be applied to standards other than the RJ45 standard, for example the USB standard.
  • the interruption device comprises two switches respectively associated with the son of the green pair of white USB cables, pair that transmits the computer data, and transmission means without switches respectively associated with the son of the black red pair of USB cables, pair that transmits the supply voltage.
  • the present invention is not limited to a predetermined number of wires in the first and second wire groups of the communication line cables. Each of these first and second groups of threads could even have a single thread, in applications where this is possible.

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Abstract

An interruption device arranged in a communication line including first and second cables in series, each including a first group of wires for the transmission of computer data and a second group of wires independent of the computer data, includes: a box provided with first and second input/output sockets with which the first and second cables, respectively, are connected; interrupters each connected between the first and second input/output sockets inside the box and actuable from outside the box, these interrupters being associated respectively with the wires of the first group; and transmission elements not including an interrupter and each connected between the first and second input/output sockets inside the box, these transmission elements being associated respectively with the wires of the second group. In a variant, the second input/output socket is replaced by two sockets associated with the interrupters and the transmission elements, respectively.

Description

La présente invention concerne un dispositif d'interruption d'une ligne de communication, plus particulièrement d'une ligne transmettant des données informatiques entre un ordinateur et un réseau informatique.The present invention relates to a device for interrupting a communication line, more particularly a line transmitting computer data between a computer and a computer network.

Un tel dispositif est décrit par exemple dans le document WO 03/010627 . Il permet à son utilisateur d'interrompre physiquement la liaison entre l'ordinateur et le réseau pour, en particulier, protéger l'ordinateur contre des attaques informatiques venant du réseau. Le document DE 102 13 351 décrit un dispositif d'interruption d'une ligne de données connecté à un ordinateur et alimenté par ce dernier pour se fermer ou s'ouvrir en fonction de l'état, actif ou de veille, de l'ordinateur.Such a device is described for example in the document WO 03/010627 . It allows the user to physically break the link between the computer and the network to, in particular, protect the computer against computer attacks from the network. The document DE 102 13 351 describes a device for interrupting a data line connected to a computer and powered by the latter to close or open according to the state, active or standby, of the computer.

Avec les connexions à large bande telles que l'ADSL, le SDSL, etc., un ordinateur peut rester connecté en permanence au réseau Internet, ce qui l'expose particulièrement aux intrusions informatiques malveillantes. Les logiciels existants du type pare-feu, anti-intrusion ou anti-virus apportent une sécurité mais sont loin de constituer une protection absolue. Interrompre la liaison physique entre le réseau et l'ordinateur lorsque ce dernier n'est pas utilisé pour échanger des données est un complément de protection très efficace.With broadband connections such as DSL, SDSL, etc., a computer can remain permanently connected to the Internet, exposing it to malicious computer intrusions. Existing software such as firewall, anti-intrusion or anti-virus provide security but are far from being an absolute protection. Interrupting the physical link between the network and the computer when the latter is not used to exchange data is a very effective complement of protection.

Les dispositifs d'interruption utilisés dans ce but présentent néanmoins un inconvénient majeur : ils ne tiennent pas compte du fait qu'une même ligne de communication de données peut servir à transmettre des signaux indépendants les uns des autres, c'est-à-dire des signaux concernant des applications différentes et/ou provenant ou destinés à des réseaux différents. Par exemple, les lignes de communication satisfaisant à la norme RJ45 comportent différents groupes fonctionnels de fils, dont l'un est prévu pour transmettre des données informatiques et un autre pour transmettre des signaux téléphoniques. En interrompant physiquement la ligne de communication reliant un ordinateur et un ou plusieurs réseaux, les dispositifs d'interruption connus à ce jour empêchent la transmission vers et depuis l'ordinateur de tous les signaux normalement véhiculés par cette ligne de communication, y compris les signaux qui ne présentent aucun risque en terme de sécurité informatique.The interrupt devices used for this purpose nevertheless have a major disadvantage: they do not take into account the fact that the same data communication line can be used to transmit signals independent of each other, that is to say signals concerning different applications and / or from or intended for different networks. For example, communication lines meeting the RJ45 standard include different functional groups of wires, one of which is intended for transmitting computer data and another for transmitting telephone signals. By physically interrupting the communication line connecting a computer and one or more networks, the interruption devices known to date prevent the transmission to and from the computer of all the signals normally conveyed by this communication line, including the signals which pose no risk in terms of computer security.

La présente invention vise à remédier à cet inconvénient et propose à cet effet un dispositif d'interruption selon la revendication 1 ou 2 annexée, une ligne de communication selon la revendication 9 ou 10, un réseau informatique selon la revendication 14 et un procédé d'interruption selon la revendication 15, des formes d'exécution particulières de l'invention étant définies dans les revendications dépendantes.The present invention aims to overcome this drawback and proposes for this purpose an interruption device according to claim 1 or 2 appended, a communication line according to claim 9 or 10, a computer network according to claim 14 and a method of An interrupt according to claim 15, particular embodiments of the invention being defined in the dependent claims.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante faite en référence aux dessins annexés dans lesquels :

  • la figure 1 montre l'extérieur d'un dispositif d'interruption selon l'invention ;
  • la figure 2 est un schéma électrique d'un dispositif d'interruption selon une première forme d'exécution de l'invention ;
  • la figure 3 est un schéma d'un système informatique incluant le dispositif d'interruption selon l'invention ;
  • la figure 4 est un schéma d'un autre système informatique incluant le dispositif d'interruption selon l'invention;
  • la figure 5 est un schéma électrique d'un dispositif d'interruption selon une seconde forme d'exécution de l'invention ;
  • la figure 6 est un schéma électrique d'un dispositif d'interruption selon une troisième forme d'exécution de l'invention ;
  • la figure 7 est un schéma électrique d'un dispositif d'interruption selon une quatrième forme d'exécution de l'invention ; et
  • la figure 8 est un schéma électrique d'un dispositif d'interruption selon une cinquième forme d'exécution de l'invention.
Other features and advantages of the present invention will appear on reading the following detailed description given with reference to the accompanying drawings in which:
  • the figure 1 shows the outside of an interruption device according to the invention;
  • the figure 2 is a circuit diagram of an interruption device according to a first embodiment of the invention;
  • the figure 3 is a diagram of a computer system including the interruption device according to the invention;
  • the figure 4 is a diagram of another computer system including the interruption device according to the invention;
  • the figure 5 is an electrical diagram of an interruption device according to a second embodiment of the invention;
  • the figure 6 is an electrical diagram of an interruption device according to a third embodiment of the invention;
  • the figure 7 is an electrical diagram of an interruption device according to a fourth embodiment of the invention; and
  • the figure 8 is an electrical diagram of an interruption device according to a fifth embodiment of the invention.

En référence aux figures 1 et 2, un dispositif d'interruption d'une ligne de communication selon l'invention, dispositif désigné par le repère 1, comprend un boîtier 2 comportant sur une de ses faces deux prises d'entrée/sortie 3, 4. Les prises d'entrée/sortie 3, 4 sont destinées à recevoir respectivement des fiches de deux câbles 5, 6, permettant à ces câbles 5, 6 d'être connectés en série. Lorsqu'ils sont branchés sur les prises 3, 4, les câbles 5, 6 définissent, avec le dispositif d'interruption 1, ladite ligne de communication.With reference to Figures 1 and 2 , a device for interrupting a communication line according to the invention, device designated by the reference numeral 1, comprises a housing 2 having on one of its faces two input / output jacks 3, 4. The input jacks / output 3, 4 are intended to receive respectively two cables 5, 6, allowing these cables 5, 6 to be connected in series. When they are connected to the sockets 3, 4, the cables 5, 6 define, with the interruption device 1, said communication line.

Dans l'exemple illustré, les prises d'entrée/sortie 3, 4 et les câbles 5, 6 sont de type RJ45. Les câbles 5, 6 comprennent donc chacun un premier groupe de fils 7a, composé de deux paires de fils dites « paire orange » 7c et « paire verte » 7d, et un second groupe de fils 7b, composé de deux autres paires de fils dites « paire bleue » 7e et « paire brune » 7f. Les premier et second groupes de fils 7a, 7b sont destinés à transmettre des signaux respectifs indépendants l'un de l'autre. Plus précisément, le premier groupe de fils 7a est destiné à transmettre des données informatiques et la paire bleue 7e du second groupe de fils 7b à transmettre des signaux téléphoniques (signaux vocaux). La paire brune 7f du second groupe de fils 7b n'est, quant à elle, pas encore utilisée dans la norme RJ45. En pratique, les fils des câbles 5, 6 ne sont pas nécessairement disposés comme illustré à la figure 2 ; ils sont généralement torsadés et les paires peuvent être entrecroisées au niveau des prises 3, 4.In the example illustrated, the input / output jacks 3, 4 and the cables 5, 6 are of the RJ45 type. The cables 5, 6 thus each comprise a first group of wires 7a, composed of two pairs of son called "orange pair" 7c and "green pair" 7d, and a second group of son 7b, composed of two other pairs of said son. "Blue pair" 7th and "brown pair" 7f. The first and second son groups 7a, 7b are intended to transmit respective signals independent of each other. More precisely, the first group of wires 7a is intended to transmit computer data and the blue pair 7e of the second group of wires 7b to transmit telephone signals (voice signals). The brown pair 7f of the second group of son 7b is, for its part, not yet used in the RJ45 standard. In practice, the wires of the cables 5, 6 are not necessarily arranged as illustrated in FIG. figure 2 ; they are usually twisted and the pairs can be intertwined at the sockets 3, 4.

A l'intérieur du boîtier 2, le dispositif d'interruption 1 selon l'invention comprend des interrupteurs 8, au nombre de quatre dans l'exemple illustré, connectés chacun entre les prises d'entrée/sortie 3, 4, plus précisément entre un contact électrique respectif 9 de la prise 3 et un contact électrique respectif 10 de la prise 4. Ces interrupteurs 8 sont associés respectivement aux fils du premier groupe 7a de chacun des câbles 5, 6 et sont actionnables simultanément depuis l'extérieur du boîtier 2 par l'intermédiaire d'un organe de commande manuel 11 prévu sur l'une des faces du boîtier 2. Les interrupteurs 8 peuvent ainsi prendre, ensemble, une position fermée dans laquelle, lorsque les câbles 5, 6 sont connectés au dispositif d'interruption 1, plus précisément aux contacts électriques 9, 10 des prises 3, 4, les fils du premier groupe 7a du câble 5 sont reliés respectivement aux fils correspondants du premier groupe 7a du câble 6, permettant l'échange de données entre les câbles 5, 6 à travers le boîtier 2, et une position ouverte (illustrée à la figure 2) dans laquelle les fils du premier groupe 7a du câble 5 sont déconnectés des fils du premier groupe 7a du câble 6.Inside the housing 2, the interruption device 1 according to the invention comprises switches 8, of which there are four in the illustrated example, each connected between the input / output jacks 3, 4, more precisely between a respective electrical contact 9 of the socket 3 and a respective electrical contact 10 of the socket 4. These switches 8 are respectively associated with the son of the first group 7a of each of the cables 5, 6 and are operable simultaneously from outside the housing 2 by means of a manual control member 11 provided on one of the faces of the housing 2. The switches 8 can thus take, together, a closed position in which, when the cables 5, 6 are connected to the device of 1, more precisely to the electrical contacts 9, 10 of the sockets 3, 4, the son of the first group 7a of the cable 5 are respectively connected to the corresponding son of the first group 7a of the cable 6, allowing the exchange of C between the cables 5, 6 through the housing 2, and a open position (shown in figure 2 ) in which the wires of the first group 7a of the cable 5 are disconnected from the wires of the first group 7a of the cable 6.

Le dispositif d'interruption 1 selon l'invention comprend également, à l'intérieur du boîtier 2, des moyens de transmission constitués de conducteurs 12, au nombre de quatre dans l'exemple illustré, connectés chacun entre les prises d'entrée/sortie 3, 4, plus précisément entre un contact électrique respectif 9 de la prise 3 et un contact électrique respectif 10 de la prise 4. Ces conducteurs 12 sont associés respectivement aux fils du second groupe 7b de chacun des câbles 5, 6. Lorsque les câbles 5, 6 sont connectés au dispositif d'interruption 1, ces conducteurs 12 relient respectivement les fils du second groupe 7b du câble 5 aux fils correspondants du second groupe 7b du câble 6, sans interruption possible.The interruption device 1 according to the invention also comprises, inside the housing 2, transmission means consisting of conductors 12, four in number in the illustrated example, each connected between the input / output jacks 3, 4, more precisely between a respective electrical contact 9 of the receptacle 3 and a respective electrical contact 10 of the receptacle 4. These conductors 12 are respectively associated with the wires of the second group 7b of each of the cables 5, 6. 5, 6 are connected to the interruption device 1, these conductors 12 respectively connect the son of the second group 7b of the cable 5 to the corresponding son of the second group 7b of the cable 6, without interruption possible.

L'intérieur du dispositif d'interruption 1 selon l'invention, comprenant les interrupteurs 8 et les conducteurs 12, est de préférence réalisé sous forme de circuit imprimé.The inside of the interruption device 1 according to the invention, comprising the switches 8 and the conductors 12, is preferably made in the form of a printed circuit.

Le dispositif d'interruption 1 selon l'invention permet donc l'interruption des communications de données entre les câbles 5, 6, tout en laissant passer les signaux éventuels, indépendants desdites données, transmis par le second groupe de fils 7b des câbles 5, 6. Plus particulièrement, dans le cas de la norme RJ45, les signaux téléphoniques transmis par la paire bleue 7e du second groupe de fils 7b peuvent continuer à être échangés à travers le boîtier 2 lorsque l'échange des données transmises par le premier groupe de fils 7a est interrompu.The interruption device 1 according to the invention thus allows the interruption of the data communications between the cables 5, 6, while allowing the possible signals, independent of said data, transmitted by the second group of wires 7b of the cables 5, to pass through, 6. More particularly, in the case of the RJ45 standard, the telephone signals transmitted by the blue pair 7e of the second group of wires 7b can continue to be exchanged through the housing 2 when the exchange of data transmitted by the first group of son 7a is interrupted.

La figure 3 montre un exemple de système informatique dans lequel le dispositif d'interruption 1 selon l'invention peut être utilisé. Ce système comprend un réseau informatique local 13, par exemple de type Ethernet, comprenant un certain nombre d'ordinateurs reliés entre eux par un câblage RJ45. L'un au moins de ces ordinateurs, désigné par le repère 14, est raccordé au reste du réseau 13 par une ligne de communication telle qu'illustrée à la figure 2, c'est-à-dire qu'un dispositif d'interruption 1 selon l'invention est connecté entre cet ordinateur 14 et la prise réseau correspondante 15 par des câbles 16 de type RJ45. Le réseau informatique local 13 peut être relié à un ou plusieurs autres réseaux, informatiques ou non, tels qu'un réseau informatique mondial 17 (Internet), un réseau téléphonique commuté 18 et un autre réseau informatique local 19. La liaison entre le réseau informatique local 13 et le réseau Internet 17 s'effectue typiquement par l'intermédiaire d'un modem DSL et celle entre le réseau informatique local 13 et l'autre réseau informatique local 19 par l'intermédiaire d'une ligne propriétaire. Quant au réseau téléphonique commuté 18, celui-ci peut être relié à un autocommutateur local duquel partent des lignes téléphoniques connectées à un panneau de brassage du réseau informatique local 13, panneau de brassage qui est relié aux différentes prises réseau du réseau informatique local 13 par des câbles RJ45.The figure 3 shows an example of a computer system in which the interruption device 1 according to the invention can be used. This system comprises a local computer network 13, for example Ethernet type, comprising a number of computers interconnected by RJ45 wiring. At least one of these computers, indicated by the mark 14, is connected to the rest of the network 13 by a communication line as illustrated in FIG. figure 2 , that is to say that an interruption device 1 according to the invention is connected between this computer 14 and the corresponding network socket 15 by cables 16 RJ45 type. The network local computer 13 may be connected to one or more other networks, computer or not, such as a global computer network 17 (Internet), a switched telephone network 18 and another local computer network 19. The link between the local computer network 13 and the Internet 17 is typically via a DSL modem and that between the local computer network 13 and the other local computer network 19 through a proprietary line. As for the switched telephone network 18, it can be connected to a local switch from which lines of telephone connected to a patch panel of the local computer network 13, patch panel which is connected to the different network jacks of the local computer network 13 by RJ45 cables.

Dans la configuration illustrée à la figure 3, le premier groupe de fils de chacun des câbles RJ45 du réseau informatique local 13 sert à transmettre les données informatiques que s'échangent entre eux les ordinateurs du réseau local 13 ainsi que les données informatiques échangées entre ces ordinateurs et le réseau Internet 17. Le second groupe de fils, quant à lui, peut servir à transmettre les données informatiques échangées entre les ordinateurs du réseau informatique local 13 et les ordinateurs de l'autre réseau informatique local 19. En variante, le second groupe de fils des câbles RJ45 connectés entre le panneau de brassage et les prises réseau peut servir à transmettre des signaux téléphoniques, pour permettre à des téléphones conventionnels 20 connectés à des prises réseau 21 du réseau informatique local 13 de communiquer avec le réseau téléphonique commuté 18.In the configuration illustrated in figure 3 , the first group of wires of each of the RJ45 cables of the local computer network 13 serves to transmit the computer data exchanged between them computers of the local network 13 as well as the computer data exchanged between these computers and the Internet network 17. second group of son, meanwhile, can be used to transmit the computer data exchanged between the computers of the local computer network 13 and the computers of the other local computer network 19. Alternatively, the second group of son RJ45 cables connected between the patch panel and network jacks can be used to transmit telephone signals, to enable conventional telephones connected to network jacks 21 of the local computer network 13 to communicate with the switched telephone network 18.

En pratique, le dispositif d'interruption 1 est placé à côté de l'ordinateur 14 pour être rendu facilement accessible à l'utilisateur de cet ordinateur 14. L'utilisateur peut ainsi interrompre à volonté la liaison physique définie par le premier groupe de fils des câbles 16 reliant l'ordinateur 14 à la prise réseau 15, par un simple actionnement de l'organe de commande manuel 11, pour protéger l'ordinateur 14 contre d'éventuelles intrusions informatiques depuis le réseau Internet 17 ou même depuis le réseau local 13. L'utilisateur peut notamment déclencher une telle interruption lorsque l'ordinateur 14 n'est pas utilisé ou est utilisé mais pas pour échanger des données avec les réseaux 13, 17. D'autres raisons peuvent amener l'utilisateur à ouvrir les interrupteurs 8 du dispositif d'interruption 1. Par exemple, il peut être utile de bloquer la transmission de données entre l'ordinateur 14 et les réseaux 13, 17 pour effectuer un contrôle antivirus ou une autre opération de sécurité dans l'ordinateur 14, pour arriver à fermer les nombreuses fenêtres d'affichage qui s'ouvrent automatiquement (fenêtres « pop-up ») lors de la consultation de certains sites Internet, ou pour faciliter l'utilisation de logiciels sensibles qui demandent beaucoup de ressources système, tels que des logiciels de gravure de disques DVD, de dessin en trois dimensions, etc.In practice, the interruption device 1 is placed next to the computer 14 to be made easily accessible to the user of the computer 14. The user can thus interrupt at will the physical link defined by the first group of son cables 16 connecting the computer 14 to the network jack 15, by a simple operation of the manual control member 11, to protect the computer 14 against possible computer intrusions from the network Internet 17 or even from the local network 13. The user can in particular trigger such an interruption when the computer 14 is not used or is used but not to exchange data with the networks 13, 17. Other reasons may cause the user to open the switches 8 of the interrupt device 1. For example, it may be useful to block the transmission of data between the computer 14 and the networks 13, 17 to carry out an antivirus check or other security in the computer 14, to manage to close the many display windows that open automatically (pop-up windows) when viewing certain Internet sites, or to facilitate the use of sensitive software that requires a lot of system resources, such as software for burning DVD discs, three-dimensional drawing, etc.

La transmission des signaux téléphoniques ou des données informatiques associées au réseau local 19 dans le second groupe de fils des câbles 16 n'est pas affectée par l'ouverture des interrupteurs 8 du dispositif d'interruption 1. Ainsi, dans le premier cas, des signaux téléphoniques peuvent continuer à être échangés, via le panneau de brassage du réseau informatique local 13, entre le réseau téléphonique commuté 18 et un téléphone 22 branché par l'intermédiaire d'une multiprise RJ45 sur la prise d'entrée/sortie du dispositif d'interruption 1 connectée à l'ordinateur 14. Dans le second cas, l'ordinateur 14 peut continuer à échanger des données avec le réseau informatique local 19. Cette dernière possibilité présente un intérêt notamment lorsque, pour certaines raisons, il est impératif que l'ordinateur 14 reste connecté en permanence au réseau local 19 ou lorsque l'échange de données avec ce réseau local 19 est considéré comme suffisamment sûr.The transmission of telephone signals or computer data associated with the local network 19 in the second group of wires of the cables 16 is not affected by the opening of the switches 8 of the interruption device 1. Thus, in the first case, The telephone signals can continue to be exchanged, via the patch panel of the local computer network 13, between the switched telephone network 18 and a telephone 22 connected via an RJ45 socket to the input / output socket of the device. In the second case, the computer 14 can continue to exchange data with the local computer network 19. The latter possibility is of interest, in particular when, for certain reasons, it is imperative that the computer 1 be connected to the computer. computer 14 remains permanently connected to the local network 19 or when the data exchange with this local network 19 is considered sufficiently secure .

Dans une autre variante d'application, on pourrait transmettre les données échangées entre les ordinateurs du réseau local 13 et le réseau Internet 17 par le premier groupe de fils des câbles RJ45 du réseau local 13 et les données échangées entre les ordinateurs du réseau local 13 par le second groupe de fils. Ainsi, en position ouverte, le dispositif d'interruption 1 protégerait l'ordinateur 14 contre les intrusions informatiques depuis le réseau Internet 17 tout en laissant passer les données échangées entre l'ordinateur 14 et les autres ordinateurs du réseau local 13.In another variant of application, the data exchanged between the computers of the local network 13 and the Internet 17 could be transmitted by the first group of wires of the RJ45 cables of the local network 13 and the data exchanged between the computers of the local network 13 by the second group of sons. Thus, in the open position, the interruption device 1 would protect the computer 14 against computer intrusions from the Internet 17 while allowing the data exchanged between the computer 14 and the other computers of the local network 13 to pass.

La figure 4 montre un autre exemple de système informatique dans lequel le dispositif d'interruption 1 selon l'invention peut être utilisé. Ce système comprend un réseau téléphonique commuté 23, un réseau informatique mondial (Internet) 24 relié au réseau téléphonique commuté 23, un modem ADSL 25 dont une première prise d'entrée/sortie 26 est connectée au réseau téléphonique commuté 23 par l'intermédiaire d'une prise téléphonique 27 et d'un câble téléphonique 28, un dispositif d'interruption 1 selon l'invention dont une première prise d'entrée/sortie 29 est reliée à une seconde prise d'entrée/sortie 30 du modem 25 par un câble 31 de type RJ45, et un ordinateur 32 relié à une seconde prise d'entrée/sortie 33 du dispositif d'interruption 1 par un câble 34 de type RJ45. Entre l'ordinateur 32 et le modem 25, le premier groupe de fils des câbles 31, 34 transmet les données échangées avec le réseau Internet 24. Un câble 25a de type téléphonique ou RJ45 relie directement la prise téléphonique 27 à la première prise d'entrée/sortie 29 du dispositif d'interruption 1 pour permettre l'échange de signaux téléphoniques entre le réseau téléphonique commuté 23 et un téléphone 35 relié à la seconde prise 33 du dispositif d'interruption 1 par l'intermédiaire d'une multiprise, signaux téléphoniques que le modem 25 ne peut pas traiter. Une ouverture des interrupteurs 8 du dispositif d'interruption 1 pour protéger l'ordinateur 32 contre des attaques informatiques venant du réseau Internet 24 n'affectera pas les communications entre le téléphone 35 et le réseau téléphonique commuté 23.The figure 4 shows another example of a computer system in which the interruption device 1 according to the invention can be used. This system comprises a switched telephone network 23, a global computer network (Internet) 24 connected to the switched telephone network 23, an ADSL modem 25, a first input / output socket 26 is connected to the switched telephone network 23 via a telephone jack 27 and a telephone cable 28, an interruption device 1 according to the invention, a first input / output socket 29 is connected to a second input / output socket 30 of the modem 25 by a RJ45 type cable 31, and a computer 32 connected to a second input / output jack 33 of the interruption device 1 by a cable RJ45 type 34. Between the computer 32 and the modem 25, the first group of wires of the cables 31, 34 transmits the data exchanged with the Internet network 24. A cable 25a of the telephone or RJ45 type directly connects the telephone socket 27 to the first socket. input / output 29 of the interrupt device 1 to allow the exchange of telephone signals between the switched telephone network 23 and a telephone 35 connected to the second socket 33 of the interruption device 1 via a power strip, signals phone that the modem 25 can not handle. An opening of the switches 8 of the interrupt device 1 to protect the computer 32 against cyber attacks from the Internet 24 will not affect the communications between the telephone 35 and the switched telephone network 23.

La figure 5 montre un dispositif d'interruption 1a selon une seconde forme d'exécution de l'invention. Cette seconde forme d'exécution diffère de la forme d'exécution illustrée aux figures 1 et 2 en ce que l'une des deux prises d'entrée/sortie 3, 4, en l'occurrence la prise 4, est remplacée par deux prises RJ45 distinctes 4a, 4b. La prise 4a est connectée à l'intérieur du boîtier 2a aux interrupteurs 8 et conducteurs internes 12a correspondant aux paires de fils orange 7c, verte 7d et brune 7f et est destinée à être connectée extérieurement à un ordinateur par le câble 6, tandis que l'autre prise 4b est connectée à l'intérieur du boîtier 2a uniquement aux deux conducteurs internes 12a correspondant à la paire de fils bleue 7e et sert de prise téléphonique destinée à recevoir une fiche d'un troisième câble 6a. Cette forme d'exécution permet d'éviter l'emploi d'une multiprise pour brancher à la fois un ordinateur et un téléphone sur le dispositif d'interruption. En variante, la prise 4b pourrait être une prise spécialement conçue pour le téléphone, telle qu'une prise RJ11.The figure 5 shows an interruption device 1a according to a second embodiment of the invention. This second embodiment differs from the embodiment illustrated in FIGS. Figures 1 and 2 in that one of the two input / output jacks 3, 4, in this case jack 4, is replaced by two RJ45 jacks distinct 4a, 4b. The socket 4a is connected inside the housing 2a to the switches 8 and internal conductors 12a corresponding to the pairs of orange 7c, green 7d and brown 7f son and is intended to be connected externally to a computer by the cable 6, while the Another socket 4b is connected inside the housing 2a only to the two inner conductors 12a corresponding to the blue pair of wires 7e and serves as a telephone jack for receiving a plug of a third cable 6a. This embodiment avoids the use of a power strip to connect both a computer and a phone on the interruption device. Alternatively, the socket 4b could be a jack specifically designed for the phone, such as an RJ11 jack.

La figure 6 montre un dispositif d'interruption 1 b selon une troisième forme d'exécution de l'invention. Cette forme d'exécution diffère de la forme d'exécution illustrée à la figure 5 en ce que les conducteurs internes 12b correspondant à la paire de fils brune 7f sont connectés à l'intérieur du boîtier 2b entre la prise 3 et la prise 4b. Comme la prise 4a n'est connectée à l'intérieur du boîtier 2b qu'aux interrupteurs 8, le câble 6 branché sur cette prise pourrait, en variante, ne comporter que le premier groupe de fils 7c-7d.The figure 6 shows an interruption device 1b according to a third embodiment of the invention. This embodiment differs from the embodiment illustrated in FIG. figure 5 in that the internal conductors 12b corresponding to the pair of brown wires 7f are connected inside the housing 2b between the socket 3 and the socket 4b. Since the socket 4a is connected inside the housing 2b only to the switches 8, the cable 6 connected to this socket could, as a variant, have only the first group of wires 7c-7d.

La figure 7 montre un dispositif d'interruption 1c selon une quatrième forme d'exécution de l'invention. Dans cette forme d'exécution, le dispositif d'interruption 1 c comprend, à l'intérieur du boîtier 2c, un circuit 36 de détection du débit de données dans le premier groupe de fils 7a, et sur une face extérieure du boîtier 2c, une diode électroluminescente 37 reliée au circuit 36. Le circuit 36 est d'un type connu en soi. Il est connecté entre les quatre interrupteurs 8 et l'une, 4, des prises d'entrée/sortie 3, 4 et commande le clignotement de la diode électroluminescente 37 en fonction du débit de données détecté. Ainsi, l'utilisateur peut visualiser en permanence le débit de données circulant dans le premier groupe de fils 7a. Un débit anormalement élevé pourra être le signe qu'une intrusion informatique est en cours. L'utilisateur pourra alors arrêter immédiatement l'intrusion en ouvrant les interrupteurs 8 du dispositif d'interruption.The figure 7 shows an interruption device 1c according to a fourth embodiment of the invention. In this embodiment, the interruption device 1c comprises, inside the housing 2c, a circuit 36 for detecting the data rate in the first group of wires 7a, and on an outer face of the housing 2c, an electroluminescent diode 37 connected to the circuit 36. The circuit 36 is of a type known per se. It is connected between the four switches 8 and one, 4, the input / output jacks 3, 4 and controls the flashing of the light emitting diode 37 according to the detected data rate. Thus, the user can constantly view the flow of data flowing in the first group of son 7a. An abnormally high rate may be the sign that a computer intrusion is in progress. The user can then immediately stop the intrusion by opening the switches 8 of the interruption device.

La figure 8 montre un dispositif d'interruption 1d selon une cinquième forme d'exécution de l'invention. Dans cette forme d'exécution, les interrupteurs 8d du dispositif d'interruption 1d sont des relais commandés par une source électrique distante 38, telle qu'un interrupteur d'éclairage, une alarme ou une serrure électrique. Les interrupteurs 8d peuvent ainsi être automatiquement ouverts lorsque l'utilisateur quitte la pièce dans laquelle se trouvent le dispositif d'interruption 1d et l'ordinateur qui lui est branché, plus précisément lorsqu'il éteint l'éclairage de la pièce, active une alarme ou ferme une serrure électrique donnant accès à la pièce.The figure 8 shows an interruption device 1d according to a fifth embodiment of the invention. In this embodiment, the switches 8d of the interruption device 1d are relays controlled by a remote electrical source 38, such as a lighting switch, an alarm or an electric lock. The switches 8d can thus be automatically opened when the user leaves the room in which the interruption device 1d and the computer connected to it are located, more specifically when he switches off the lighting of the room, activates an alarm or close an electric lock giving access to the room.

La présente invention a été décrite ci-dessus à titre d'exemple uniquement. Il va de soi que des modifications pourraient être faites sans sortir du cadre de l'invention revendiquée. Par exemple, les dispositifs d'interruption 1a, 1b et 1d selon les seconde, troisième et cinquième formes d'exécution de l'invention pourraient eux aussi être munis d'un circuit de détection de débit de données et d'une diode électroluminescente. Par ailleurs, la présente invention peut s'appliquer à d'autres normes que la norme RJ45, par exemple la norme USB. Dans ce dernier cas, le dispositif d'interruption comprendrait deux interrupteurs associés respectivement aux fils de la paire verte blanche des câbles USB, paire qui transmet les données informatiques, et des moyens de transmission sans interrupteurs associés respectivement aux fils de la paire rouge noire des câbles USB, paire qui transmet la tension d'alimentation. De manière générale, la présente invention n'est pas limitée à un nombre déterminé de fils dans les premier et second groupes de fils des câbles de la ligne de communication. Chacun de ces premier et second groupes de fils pourrait même comporter un seul fil, dans les applications où cela est possible.The present invention has been described above by way of example only. It goes without saying that modifications could be made without departing from the scope of the claimed invention. For example, the interruption devices 1a, 1b and 1d according to the second, third and fifth embodiments of the invention could also be provided with a data rate detection circuit and a light emitting diode. Moreover, the present invention can be applied to standards other than the RJ45 standard, for example the USB standard. In the latter case, the interruption device comprises two switches respectively associated with the son of the green pair of white USB cables, pair that transmits the computer data, and transmission means without switches respectively associated with the son of the black red pair of USB cables, pair that transmits the supply voltage. In general, the present invention is not limited to a predetermined number of wires in the first and second wire groups of the communication line cables. Each of these first and second groups of threads could even have a single thread, in applications where this is possible.

Claims (15)

  1. Device (1) for interrupting a communication line, the communication line comprising first and second cables (5, 6) each comprising a first group of wire(s) (7a) for the transmission of computer data and a second group of wire(s) (7b) independent of said computer data, the interruption device (1) comprising:
    - a box (2) provided with first (3) and second (4) input/output sockets with which the first and second cables (5, 6) respectively can be connected,
    - one or more interrupters (8), each connected between the first and second input/output sockets (3, 4) inside the box (2) and actuable from outside the box (2), this/these interrupter(s) (8) serving to connect/disconnect the wire(s) of the first group (7a) of the first cable (5) respectively with/from the wire(s) of the first group (7a) of the second cable (6), and
    - transmission means (12) not comprising an interrupter and each connected between the first and second input/output sockets (3, 4) inside the box (2), these transmission means (12) serving to connect the wire(s) of the second group (7b) of the first cable (5) respectively with the wire(s) of the second group (7b) of the second cable (6).
  2. Device (1a; 1b) for interrupting a communication line, the communication line comprising first and second cables (5, 6) each comprising a first group of wire(s) (7c, 7d) for the transmission of computer data, the first cable (5) further comprising a second group of wire(s) (7e; 7e, 7f) independent of said computer data, the interruption device comprising:
    - a box provided with first (3), second (4a), and third (4b) input/output sockets with which the first and second cables (5, 6) and a third cable (6a), respectively, can be connected,
    - one or more interrupters (8), each connected between the first and second input/output sockets (3, 4a) inside the box and actuable from outside the box, this/these interrupter(s) (8) serving to connect/disconnect the wire(s) of the first group (7c, 7d) of the first cable (5) respectively with/from the wire(s) of the first group (7c, 7d) of the second cable (6), and
    - transmission means (12a; 12b) not comprising an interrupter and each connected between the first (3) and third (4b) input/output sockets inside the box, these transmission means (12a; 12b) serving to connect the wire(s) of the second group (7e; 7e, 7f) of the first cable (5) respectively with one or more wire(s) of the third cable (6a).
  3. Interruption device according to claim 1 or 2, wherein the interrupters (8) number four and the transmission means (12; 12b) consist of four conductors.
  4. Interruption device according to any one of claims 1 to 3, wherein the first and second input/output sockets (3, 4; 3, 4a) are sockets of the RJ45 type.
  5. Interruption device according to any one of claims 1 to 4, further comprising means (36) for detecting the rate of said computer data in the communication line, and visualization means (37) for informing the user of the detected rate.
  6. Device according to claim 5, wherein the visualization means (37) comprise an electroluminescent diode mounted on the box (2c) and controlled in such a way that its blinking be representative of the detected rate.
  7. Interruption device according to any one of the claims 1 to 6, comprising a manual control member (11) for actuating the interrupter(s) (8).
  8. Interruption device according to any one of claims 1 to 6, wherein the interrupter(s) are relays.
  9. Communication line comprising :
    - an interruption device (1) according to claim 1 or according to any one of claims 3 to 8 when depending on claim 1, and
    - the first and second cables (5, 6) defined in claim 1, the first and second cables (5, 6) being connected with the first and second input/output sockets (3, 4), respectively, of the interruption device.
  10. Communication line comprising :
    - an interruption device (1a; 1b) according to claim 2 or according to any one of claims 3 to 8 when depending on claim 2, and
    - the first and second cables (5, 6) defined in claim 2, the first and second cables (5, 6) being connected with the first and second input/output sockets (3, 4a), respectively, of the interruption device.
  11. Communication line according to claim 9 or 10, wherein the second group of wire(s) (7e, 7f) comprises at least one wire intended to carry telephone signals.
  12. Communication line according to any one of claims 9 to 11, wherein the second group of wire(s) (7e, 7f) comprises at least one wire intended to carry other computer data.
  13. Device comprising an interruption device according to claim 8 and an electrical source controlling the relay(s) of the interruption device, this electrical source consisting of one of the following elements: a light switch, an alarm device, an electrical lock.
  14. Computer network comprising at least one computer (14; 32) connected with a network socket (15; 27) via a communication line according to any one of claims 9 to 12.
  15. Method of interrupting a transmission of computer data in a communication line (1, 5, 6) according to claim 9, according to which method one physically interrupts the link defined by the first group of wire(s) (7a), without interrupting the link defined by the second group of wire(s) (7b), by means of the interruption device (1).
EP06842211A 2005-12-09 2006-11-28 Interruption device for a data communication line Active EP1958298B1 (en)

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CH19492005 2005-12-09
PCT/IB2006/003376 WO2007066184A2 (en) 2005-12-09 2006-11-28 Interruption device for a data communication line

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US7706527B2 (en) 2010-04-27
ATE434845T1 (en) 2009-07-15
US20080304655A1 (en) 2008-12-11
WO2007066184A2 (en) 2007-06-14
DE602006007485D1 (en) 2009-08-06
WO2007066184A3 (en) 2007-10-04

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