EP1439510B1 - Danger signalling system - Google Patents

Danger signalling system Download PDF

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Publication number
EP1439510B1
EP1439510B1 EP03025429A EP03025429A EP1439510B1 EP 1439510 B1 EP1439510 B1 EP 1439510B1 EP 03025429 A EP03025429 A EP 03025429A EP 03025429 A EP03025429 A EP 03025429A EP 1439510 B1 EP1439510 B1 EP 1439510B1
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EP
European Patent Office
Prior art keywords
transmission device
detector
fire alarm
bma
communication network
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03025429A
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German (de)
French (fr)
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EP1439510A1 (en
Inventor
Dietrich Bornewasser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Building Technology Fire and Security Products GmbH and Co OHG
Original Assignee
Siemens Gebaeudesicherheit GmbH and Co OHG
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Publication of EP1439510A1 publication Critical patent/EP1439510A1/en
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines

Definitions

  • a preferred application of the invention is in the field of alarm transmission in fire alarm systems.
  • the automatic fire alarm transmission equipment used with which the alarm signal a fire alarm panel or a push button fire detector via a transmission network, such as ISDN, transmitted to a fire station and evaluated there by a receiving device.
  • the transmission device which is located in the area of the object to be protected, even then remain operational if the fire alarm system itself has been affected by a fire and therefore can not give an alarm to the transmission device.
  • a system for detecting a malfunction in which a sensor device for forwarding a signal for a malfunction is coupled to a telecommunication device. Also in this case, the sensor device has an independent of the building energy supply system power supply device in the form of a rechargeable battery.
  • US-A-5278888 discloses a hazard detection system corresponding to the preamble of claim 1.
  • the aim of the present invention is therefore to design a hazard detection system of the type mentioned so that the transmission device is not only completely independent of the supply network of the object to be monitored, but also requires virtually no maintenance.
  • this object is achieved by a hazard detection system according to claim 1.
  • the invention makes use of the fact that the usual communication networks, such as ISDN, offer the possibility for the power supply of connected terminals electrical power up to a predetermined Upper limit, for example 380 mW, to take.
  • a predetermined Upper limit for example 380 mW
  • the transmission device of the danger detection system according to the invention as well as a telephone without its own network connection draws its energy directly from the communication network.
  • this device not only optimally meets the requirements of the fire department regulations regarding the functional integrity of the transmission device in case of fire, but it is also as good as maintenance-free by the elimination of the battery.
  • Another advantage consists in the fact that the expense of a separate power supply including a cable from the 230 V network is saved with the required protection.
  • the circuit of the transmission device must be designed so that the permissible energy extraction from the communication network is not exceeded.
  • this is readily possible with correspondingly miniaturized components.
  • the transmission device including its power supply circuit is arranged in a common housing with a push-button fire alarm, which means an additional saving of space and installation effort.
  • the network termination unit of the communication network with, if the detector housing is adjusted as needed in size.
  • FIG. 1 shows a block diagram of a danger detection system, for example as a fire alarm system with a manually operated detector M1, a transmission device UE, a communication network KN and a reporting center FZ, which is a fire station in the present example.
  • a danger detection system for example as a fire alarm system with a manually operated detector M1, a transmission device UE, a communication network KN and a reporting center FZ, which is a fire station in the present example.
  • the communication network KN which is only indicated here, is provided at its illustrated ends each with a network termination unit NA, which allows the connection of terminals. If the network is, for example, an ISDN network, then the termination takes place in each case with the so-called NTBA device (Network Termination Basic Access).
  • NTBA device Network Termination Basic Access
  • the transmission device UE In the central FZ an alarm recognition device AE is connected to the communication network in this way, while at the other end the transmission device UE according to the invention is connected to the network termination unit NA.
  • the actual transmission circuit preferably a microcontroller MC, is designed so that it evaluates, for example, a message signal m1 from the detector M1 and in the form of an alarm signal AL on the communication network and addressed to the evaluation device AE in the central FZ.
  • control signals MS can also be transmitted from the center FZ via the communication network KN in the transmission device.
  • the transmission device UE further includes a power supply circuit EV, which essentially includes a transformer TR shown schematically. This is on the primary side connected to the network termination unit NA and this takes the supply current I v for the transmission device UE.
  • a power supply circuit EV which essentially includes a transformer TR shown schematically. This is on the primary side connected to the network termination unit NA and this takes the supply current I v for the transmission device UE.
  • the transmission device UE is connected together with its power supply circuit EV via the network termination unit to the communication network CN.
  • the Transmission device provided an interface SS, via which a fire alarm system BMA can be connected to a plurality of detectors.
  • a detector signal m2 of the fire alarm system BMA is thus converted via the interface SS and the microcontroller MC in an alarm signal AL and placed on the communication network CN. If the fire alarm system BMA fails, it is still possible to generate an alarm signal via the detector M1.
  • control signals can also be transmitted from the control center to the signaling system BMA or to its individual detectors.

Abstract

The alarm system has at least one detector (M1) for providing an alarm signal transmitted via a LV communications network (KN) to a reception station (AE). The transmission device (UE) supplying the alarm signal to the LV communications network has a current supply circuit (EV) with a transformer (TR) for delivering the supply voltage for the transmission device from the communications network voltage.

Description

Die Erfindung betrifft ein Gefahrenmeldesystem mit

  • mindestens einem ein Alarmsignal auslösenden Melder,
  • einem Niederspannungs-Kommunikationsnetz zur Übertragung des Alarmsignals an eine Empfangsstation und
  • einer Übertragungseinrichtung zur Übergabe des Alarmsignals von dem mindestens einen Melder in das Kommunikationsnetz.
The invention relates to a hazard detection system with
  • at least one detector triggering an alarm signal,
  • a low voltage communication network for transmitting the alarm signal to a receiving station and
  • a transmission device for transferring the alarm signal from the at least one detector into the communication network.

Eine bevorzugte Anwendung der Erfindung liegt auf dem Gebiet der Alarmübertragung bei Brandmeldeanlagen. Bei derartigen Anlagen werden zur automatischen Alarmierung der Feuerwehr Übertragungseinrichtungen eingesetzt, mit denen das Alarmsignal einer Brandmeldezentrale oder eines Druckknopffeuermelders über ein Übertragungsnetz, beispielsweise ISDN, zu einer Feuerwehrzentrale übertragen und dort von einer Empfangseinrichtung ausgewertet wird. Dabei muß die Übertragungseinrichtung, die sich im Bereich des zu schützenden Objektes befindet, auch dann noch einsatzfähig bleiben, wenn die Brandmeldeanlage selbst durch einen Brand in Mitleidenschaft gezogen wurde und daher keinen Alarm mehr an das Übertragungsgerät geben kann. In diesem Fall muß es beispielsweise möglich sein, über einen Druckknopfmelder noch einen Alarm über die Übertragungseinrichtung zur Feuerwehrzentrale zu geben. Aus diesem Grund wird vermieden, die Energieversorgung der Übertragungseinrichtung mit der Brandmeldeanlage zu verknüpfen; es wird deshalb üblicherweise eine eigene Stromversorgungseinrichtung in dem Übertragungsgerät vorgesehen.A preferred application of the invention is in the field of alarm transmission in fire alarm systems. In such systems, the automatic fire alarm transmission equipment used with which the alarm signal a fire alarm panel or a push button fire detector via a transmission network, such as ISDN, transmitted to a fire station and evaluated there by a receiving device. In this case, the transmission device, which is located in the area of the object to be protected, even then remain operational if the fire alarm system itself has been affected by a fire and therefore can not give an alarm to the transmission device. In this case, it must be possible, for example, to give an alarm via the push button to the fire department headquarters via a push button. For this reason, it is avoided to link the power supply of the transmission device with the fire alarm system; It is therefore usually provided its own power supply device in the transmission device.

So ist beispielsweise in der US 3 883 695 ein Alarmübertragungssystem beschrieben, bei dem das Alarmsignal über Telefonleitungen übertragen wird und bei dem eine eigene Stromversorgung aus dem Wechselstromnetz vorgesehen ist. Zur Notstromversorgung ist außerdem eine Batterie zusätzlich angeschaltet.Thus, for example, in US 3,883,695 an alarm transmission system is described, in which the alarm signal is transmitted via telephone lines and in which a separate power supply is provided from the AC mains. For emergency power supply In addition, a battery is additionally turned on.

In der Gebrauchsmusterschrift DE 20113878U1 ist ebenfalls ein System zur Erfassung einer Betriebsstörung beschrieben, bei dem eine Sensoreinrichtung zur Weiterleitung eines Signals für eine Betriebsstörung mit einer Fernmeldeeinrichtung gekoppelt ist. Auch in diesem Fall weist die Sensoreinrichtung eine von dem Gebäudeenergieversorgungssystem unabhängige Energieversorgungseinrichtung in Form einer aufladbaren Batterie auf.In the utility model DE 20113878U1 also a system for detecting a malfunction is described, in which a sensor device for forwarding a signal for a malfunction is coupled to a telecommunication device. Also in this case, the sensor device has an independent of the building energy supply system power supply device in the form of a rechargeable battery.

Derartige unabhängige Stromversorgungen erfüllen damit zwar die obengenannte Forderung, daß die Übertragungseinrichtung auch bei einem Netzausfall in einem brennenden Objekt noch betriebsbereit ist - soweit das Kommunikationsnetz selbst noch nicht zerstört ist - , doch ist damit ein nicht unbeträchtlicher zusätzlicher Aufwand für die Wartung der Batterie verbunden.Although such independent power supplies thus meet the above requirement that the transmission device is still operational even in a power failure in a burning object - as far as the communication network itself is not destroyed - but this is a not inconsiderable additional expense for the maintenance of the battery connected.

US-A-5278888 offenbart ein Gefahrenmeldesystem, das dem Oberbegriff des Anspruchs 1 entspricht.US-A-5278888 discloses a hazard detection system corresponding to the preamble of claim 1.

Ziel der vorliegenden Erfindung ist es deshalb, ein Gefahrenmeldesystem der eingangs genannten Art so zu gestalten, daß das Übertragungsgerät nicht nur völlig unabhängig vom Versorgungsnetz des zu überwachenden Objektes ist, sondern darüber hinaus auch praktisch keine Wartung benötigt.The aim of the present invention is therefore to design a hazard detection system of the type mentioned so that the transmission device is not only completely independent of the supply network of the object to be monitored, but also requires virtually no maintenance.

Erfindungsgemäß wird dieses Ziel durch ein Gefahrenmeldesystem nach Anspruch 1 erreicht.According to the invention, this object is achieved by a hazard detection system according to claim 1.

Die Erfindung macht sich dabei die Erkenntnis zunutze, daß die üblichen Kommunikationsnetzwerke, beispielsweise ISDN, die Möglichkeit bieten, zur Energieversorgung angeschlossener Endgeräte elektrische Leistung bis zu einer vorgegebenen Obergrenze, beispielsweise 380 mW, zu entnehmen. Das bedeutet, daß die Übertragungseinrichtung des erfindungsgemäßen Gefahrenmeldesystems ebenso wie ein Telefon ohne eigenen Netzanschluß seine Energie direkt aus dem Kommunikationsnetz bezieht. Damit erfüllt aber dieses Gerät nicht nur optimal die Anforderungen der Feuerwehrbestimmungen bezüglich des Funktionserhalts des Übertragungsgeräts im Brandfalle, sondern es ist durch den Wegfall der Batterie auch so gut wie wartungsfrei. Ein weiterer Vorteil besteht auch darin, daß der Aufwand einer separaten Stromversorgung einschließlich einer Zuleitung aus dem 230 V-Netz mit der erforderlichen Absicherung eingespart wird.The invention makes use of the fact that the usual communication networks, such as ISDN, offer the possibility for the power supply of connected terminals electrical power up to a predetermined Upper limit, for example 380 mW, to take. This means that the transmission device of the danger detection system according to the invention as well as a telephone without its own network connection draws its energy directly from the communication network. But this device not only optimally meets the requirements of the fire department regulations regarding the functional integrity of the transmission device in case of fire, but it is also as good as maintenance-free by the elimination of the battery. Another advantage consists in the fact that the expense of a separate power supply including a cable from the 230 V network is saved with the required protection.

Selbstverständlich muß die Schaltung der Übertragungseinrichtung so ausgelegt werden, daß die zulässige Energieentnahme aus dem Kommunikationsnetz nicht überschritten wird. Dies ist jedoch mit entsprechend miniaturisierten Bauelementen ohne weiteres möglich. In diesem Zusammenhang ist es in einer Weiterbildung der Erfindung auch möglich, daß die Übertragungseinrichtung einschließlich ihrer Stromversorgungsschaltung in einem gemeinsamen Gehäuse mit einem Druckknopf-Feuermelder angeordnet wird, was eine zusätzliche Einsparung an Raum und Montageaufwand bedeutet. Darüber hinaus ist es aber auch möglich, in dem selben Gehäuse unter Umständen auch die Netzabschlußeinheit des Kommunikationsnetzes mit unterzubringen, wenn das Meldergehäuse bedarfsweise in der Größe angepaßt wird.Of course, the circuit of the transmission device must be designed so that the permissible energy extraction from the communication network is not exceeded. However, this is readily possible with correspondingly miniaturized components. In this context, it is also possible in a development of the invention that the transmission device including its power supply circuit is arranged in a common housing with a push-button fire alarm, which means an additional saving of space and installation effort. In addition, it is also possible to accommodate in the same case under certain circumstances, the network termination unit of the communication network with, if the detector housing is adjusted as needed in size.

Die Erfindung wird nachfolgend an Ausführungsbeispielen anhand der Zeichnung näher erläutert. Es zeigt

  • Figur 1 ein erstes Blockschaltbild eines Beispielgebenden Gefahrenmeldesystems mit einem Übertragungsgerät und einem einzelnen Melder und
  • Figur 2 das Blockschaltbild eines Erfindungsgemäßen Gefahrenmeldesystems mit einer an die Übertragungseinrichtung angeschlossenen Brandmeldeanlage.
The invention will be explained in more detail by means of embodiments with reference to the drawing. It shows
  • Figure 1 is a first block diagram of an example hazard alarm system with a transmission device and a single detector and
  • 2 shows the block diagram of an inventive hazard detection system with a connected to the transmission device fire alarm system.

Figur 1 zeigt im Blockschaltbild ein Gefahrenmeldesystems, beispielshalber als Feuermeldesystem mit einem von Hand zu betätigenden Melder M1, einer Übertragungseinrichtung UE, einem Kommunikationsnetz KN und einer Meldezentrale FZ, die im vorliegenden Beispiel eine Feuerwehrzentrale ist.1 shows a block diagram of a danger detection system, for example as a fire alarm system with a manually operated detector M1, a transmission device UE, a communication network KN and a reporting center FZ, which is a fire station in the present example.

Das Kommunikationsnetz KN, das hier nur angedeutet ist, ist an seinen dargestellten Enden jeweils mit einer Netzabschlußeinheit NA versehen, die den Anschluß von Endgeräten ermöglicht. Ist das Netz beispielsweise ein ISDN-Netz, so erfolgt der Abschluß jeweils mit dem so genannten NTBA-Gerät (Network Termination Basic Access). In der Zentrale FZ ist auf diese Weise eine Alarmerkennungseinrichtung AE an das Kommunikationsnetz angeschlossen, während an dem anderen Ende die erfindungsgemäße Übertragungseinrichtung UE an die Netzabschlußeinheit NA angeschaltet ist. In der Übertragungseinrichtung ist die eigentliche Übertragungsschaltung, vorzugsweise ein Mikrocontroller MC, so ausgelegt, daß er beispielsweise ein Meldesignal m1 von dem Melder M1 auswertet und in Form eines Alarmsignals AL auf das Kommunikationsnetz gibt und an die Auswerteeinrichtung AE in der Zentrale FZ adressiert. Umgekehrt können Steuersignale MS auch von der Zentrale FZ über das Kommunikationsnetz KN in die Übertragungseinrichtung übertragen werden.The communication network KN, which is only indicated here, is provided at its illustrated ends each with a network termination unit NA, which allows the connection of terminals. If the network is, for example, an ISDN network, then the termination takes place in each case with the so-called NTBA device (Network Termination Basic Access). In the central FZ an alarm recognition device AE is connected to the communication network in this way, while at the other end the transmission device UE according to the invention is connected to the network termination unit NA. In the transmission device, the actual transmission circuit, preferably a microcontroller MC, is designed so that it evaluates, for example, a message signal m1 from the detector M1 and in the form of an alarm signal AL on the communication network and addressed to the evaluation device AE in the central FZ. Conversely, control signals MS can also be transmitted from the center FZ via the communication network KN in the transmission device.

Die Übertragungseinrichtung UE enthält ferner eine Energieversorgungsschaltung EV, die im wesentlichen einen schematisch dargestellten Übertrager TR beinhaltet. Dieser ist primärseitig mit an die Netzabschlußeinheit NA angeschaltet und entnimmt dieser den Versorgungsstrom Iv für die Übertragungseinrichtung UE.The transmission device UE further includes a power supply circuit EV, which essentially includes a transformer TR shown schematically. This is on the primary side connected to the network termination unit NA and this takes the supply current I v for the transmission device UE.

In Figur 2 ist eine Ausführungsform schematisch gezeigt. Auch in diesem Fall ist die Übertragungseinrichtung UE zusammen mit ihrer Energieversorgungsschaltung EV über die Netzabschlußeinheit an das Kommunikationsnetz KN angeschlossen. Zusätzlich ist in diesem Fall jedoch in der Übertragungseinrichtung eine Schnittstelle SS vorgesehen, über die eine Brandmeldeanlage BMA mit einer Mehrzahl von Meldern angeschaltet werden kann. Ein Meldersignal m2 von der Brandmeldeanlage BMA wird somit über die Schnittstelle SS und den Mikrocontroller MC in ein Alarmsignal AL umgewandelt und auf das Kommunikationsnetzwerk KN gegeben. Fällt die Brandmeldeanlage BMA aus, so ist immer noch die Möglichkeit vorhanden, über den Melder M1 ein Alarmsignal zu erzeugen.In Figure 2, an embodiment is shown schematically. Also in this case, the transmission device UE is connected together with its power supply circuit EV via the network termination unit to the communication network CN. In addition, in this case, however, in the Transmission device provided an interface SS, via which a fire alarm system BMA can be connected to a plurality of detectors. A detector signal m2 of the fire alarm system BMA is thus converted via the interface SS and the microcontroller MC in an alarm signal AL and placed on the communication network CN. If the fire alarm system BMA fails, it is still possible to generate an alarm signal via the detector M1.

Durch entsprechende Gestaltung der Schnittstelle SS ist es weiterhin möglich, auch bestimmte Informationen von den einzelnen Meldern der Meldeanlage BMA über die Übertragungseinrichtung zur Zentrale FZ zu geben. Umgekehrt können über die entsprechend ausgerüstete Schnittstelle SS auch Steuersignale von der Zentrale an die Meldeanlage BMA bzw. an ihre einzelnen Melder gegeben werden.By appropriate design of the interface SS, it is also possible to give certain information from the individual detectors of the signaling system BMA on the transmission device to the central FZ. Conversely, via the correspondingly equipped interface SS, control signals can also be transmitted from the control center to the signaling system BMA or to its individual detectors.

Es ist möglich, die Übertragungseinrichtung samt der Energieversorgungsschaltung EV in einem Gehäuse G1 bzw. G2 unterzubringen, das das Gehäuse eines Druckknopfmelders M1 ist. Wenn, wie in Figur 2 angedeutet, auch die Netzanschlußeinheit NA mit in dem Gehäuse untergebracht werden soll, wird dieses Gehäuse (G2 + G2') etwas größer in seinen Abmessungen sein als ein normaler Druckknopfmelder. Die Einsparung an Platz für ein zweites Gehäuse und an zusätzlichen Montagearbeiten rechtfertigt es jedoch, in diesem Fall die Gehäuseabmessungen des Druckknopfmelders zu ändern.It is possible to accommodate the transmission device together with the power supply circuit EV in a housing G1 or G2, which is the housing of a push-button M1. If, as indicated in Figure 2, the power supply unit NA to be housed in the housing, this housing (G2 + G2 ') will be slightly larger in size than a normal push button. The saving of space for a second housing and additional assembly work, however, justifies in this case to change the housing dimensions of the push button.

Claims (6)

  1. Danger signaling system
    - with a fire alarm system (BMA), equipped with a plurality of detectors,
    - with at least one additional detector (M1) triggering an alarm signal,
    - with a low-voltage communication network (KN) for transmission of the alarm signal and of detector signals (m2) of the fire alarm system to a receive station (AE) and
    - a transmission device (UE) for transfer of the alarm signal of the at least one additional detector (M1) or the detector signals (m2) into the communication network (KN), with the fire alarm system (BMA) being connected via an interface (SS) to the transmission device (UE),
    characterized in that the additional detector is a manually-actuated call point (M1), and that the transmission device (UE) has a power supply circuit (EV) with a transformer (TR),
    which is connected on the primary side to the voltage of the communication network and on the secondary side delivers the supply voltage for the transmission device (UE) .
  2. System according to claim 1,
    characterized in that the additional detector (M1) contains a mechanically actuatable electrical switching element.
  3. System according to claim 1 or 2,
    characterized in that the transmission device (UE) along with the power supply unit (EV) is arranged in a shared housing (G1; G2) with the additional detector (M1).
  4. System according to claim 3,
    characterized in that a network termination unit (NA) is additionally housed in the shared housing (G1; G2).
  5. System according to claim 1 to 4,
    characterized in that the interface (SS) is embodied so that, in addition to detector signals (m2), it is also capable of transmitting individual information of the detectors connected in the fire alarm system (BMA) to the control centre (FZ).
  6. System according to claim 1 to 5,
    characterized in that control commands are transmitted from the control centre (FZ) into the fire alarm system (BMA) or to individual detectors over the interface (SS).
EP03025429A 2003-01-17 2003-11-05 Danger signalling system Expired - Lifetime EP1439510B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10301671A DE10301671B3 (en) 2003-01-17 2003-01-17 Electrical alarm system e.g. a fire alarm system, with operating voltage for transmission device supplying detector signals to communications network obtained from network voltage
DE10301671 2003-01-17

Publications (2)

Publication Number Publication Date
EP1439510A1 EP1439510A1 (en) 2004-07-21
EP1439510B1 true EP1439510B1 (en) 2007-03-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03025429A Expired - Lifetime EP1439510B1 (en) 2003-01-17 2003-11-05 Danger signalling system

Country Status (4)

Country Link
EP (1) EP1439510B1 (en)
AT (1) ATE357715T1 (en)
DE (2) DE10301671B3 (en)
ES (1) ES2285023T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010039406A1 (en) * 2010-08-17 2012-02-23 Zumtobel Lighting Gmbh Busphasenwächter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3390234A (en) * 1967-02-27 1968-06-25 Glidden Electric Corp Combination telephone fire alarm and meter reading system
US3883695A (en) * 1973-05-14 1975-05-13 Vertex Science Ind Inc Alarm reporting system for transmitting digital alarm signals via a telephone line
WO1989004574A1 (en) * 1987-11-13 1989-05-18 Kim Sang Rok Telephone alerting system
US5278888A (en) * 1990-04-11 1994-01-11 Sostel Oy Intelligent alarm apparatus with interfacing to a telephone network
AU784517B2 (en) * 1999-11-15 2006-04-27 Ge Security, Inc. Highly reliable power line communications system
SE0002981D0 (en) * 2000-08-22 2000-08-22 Mobile Notifier Ab Device for remotely transmitting alarms
DE20113878U1 (en) * 2001-08-22 2001-10-18 Bsh Bosch Siemens Hausgeraete System for detecting a malfunction, especially in a building

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Publication number Publication date
DE50306838D1 (en) 2007-05-03
DE10301671B3 (en) 2004-06-03
ES2285023T3 (en) 2007-11-16
ATE357715T1 (en) 2007-04-15
EP1439510A1 (en) 2004-07-21

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