EP1460596A1 - Communication system for a building and use of communication system - Google Patents

Communication system for a building and use of communication system Download PDF

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Publication number
EP1460596A1
EP1460596A1 EP03006325A EP03006325A EP1460596A1 EP 1460596 A1 EP1460596 A1 EP 1460596A1 EP 03006325 A EP03006325 A EP 03006325A EP 03006325 A EP03006325 A EP 03006325A EP 1460596 A1 EP1460596 A1 EP 1460596A1
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EP
European Patent Office
Prior art keywords
communication system
communication
building
line
detector line
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EP03006325A
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German (de)
French (fr)
Inventor
Walter Vollenweider
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Siemens AG
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Siemens Building Technologies AG
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Application filed by Siemens Building Technologies AG filed Critical Siemens Building Technologies AG
Priority to EP03006325A priority Critical patent/EP1460596A1/en
Publication of EP1460596A1 publication Critical patent/EP1460596A1/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/007—Details of, or arrangements associated with, antennas specially adapted for indoor communication
    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B27/00—Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations

Definitions

  • the present invention relates to a communication system for a building, which has a wired danger control system with a control center and peripheral devices connected to it via at least one line.
  • Such a hazard control system can be, for example, a fire alarm system with fire detectors distributed in the building, which are connected to the control center via a bus, or an electroacoustic emergency warning system with loudspeakers distributed in the building for announcing evacuation information.
  • a fire alarm system and an electroacoustic emergency warning system is also possible.
  • a "fire brigade telephone” can be provided separately, via which the firefighters can communicate on site with the head of operations at the headquarters.
  • a fire-fighting telephone is hard-wired and has permanently installed telephone sets and therefore requires additional investments.
  • a radio system or generally a wireless communication system, instead of the fire-fighting telephone is less complex, but the radio devices are limited in range, especially in large reinforced concrete buildings. For example, more than a hundred firefighters lost their lives in the terrorist attack in New York on September 11, 2001 because they were unable to call them back in time. The main reason for this was the difficulty in penetrating the structure of the buildings with the available radio. It is also known to lay a coaxial cable as an antenna in a radio system in the building, so that the radio devices only have to bridge the distance to the coaxial cable. But the coaxial cable is also an additional and costly investment.
  • the invention is intended to provide a communication system of the type mentioned at the outset, which has all the advantages of a radio system, in particular low additional installation costs, and which penetrates the structure of buildings with certainty.
  • the at least one line of the hazard control system is used as an antenna for inductive transmission, and in that portable inductive receivers are provided for the transmitted communication signals.
  • the inductive transmission preferably takes place in the frequency range below 135 kHz.
  • a preferred embodiment of the communication system according to the invention is characterized in that the hazard control system is formed by a fire detection system with fire detectors distributed peripherally in the building and connected to the control center via at least one detector line, and that at least one connection is provided with which the at least one detector line for the Feeding a communication signal is separable.
  • the existing lines of a hazard control system preferably the detector lines of a fire alarm system
  • the detector lines of a fire alarm system are used for communication with people distributed in and / or circulating in the building. If these people are firefighters, for example, then they carry the receivers with them and are safely reachable from anywhere in the building. This is because relatively high signal strengths are permissible in the frequency range below 135 kHz. The most likely cause of interference in communication signals could be screens. However, since the building should be de-energized in the event of a fire and the firefighters tend to be in corridors and stairwells, this source of interference is of minor importance.
  • a further preferred embodiment of the communication system according to the invention is characterized in that the communication signals are fed in by at least one permanently installed transmitter or a portable device.
  • the transportable device is preferably formed by a personal computer and the at least one connection is preferably provided in the control center or on the at least one detector line.
  • a plurality of connections are provided, one of which is located in the control center and at least one on the at least one detector line.
  • a redundant inductive transmission on different frequencies is preferably carried out.
  • the invention further relates to the use of the communication system mentioned for communication with emergency services, in particular firefighters, the portable receivers being carried by the firefighters.
  • the invention is explained in more detail below on the basis of an exemplary embodiment shown in the single drawing.
  • the drawing shows a schematic representation of a fire alarm system installed in a building, wherein instead of the fire alarm system, another hazard control system, such as an electroacoustic emergency warning system, can also be provided. It is essential that the fire alarm system or the hazard control system has a control center and at least one peripheral connected to it in the form of a loop.
  • the fire alarm system designated by the reference number 1 essentially consists of a control center 2 and fire detectors 3 installed in the building to be protected, which are connected to a detector line 4 laid in the form of a loop, via which the power supply to the fire detectors 3 and their communication with the Fire alarm center 2 takes place.
  • the latter is located in a command room in which the fire department's head of operations is stationed in the event of a fire.
  • detector lines 4 are connected to the control center 2.
  • the firefighters carry receiver 5 with them for receiving inductively transmitted communication signals in the frequency range below 135 kHz. This frequency range is chosen, among other things, due to legal regulations.
  • the reference numeral 6 designates a device with which communication signals can be fed into the detector line 4.
  • the device 6 is a portable or permanently installed transmitter, which in the latter case is preferably connected to the control center 2.
  • the control center 2 and / or the detector line 4 has connections 7 at suitable points, by means of which the detector line 4 can be separated.
  • the connection of the device 6, which is formed, for example, by a PC, to the connections 7 is indicated by a broken line 8. Since the detectors 3 are constructed in such a way that they function reliably even in the presence of strong interference signals, they will be able to remain in operation during the feeding and transmission of communication signals.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)

Abstract

The antenna for the inductive receiver (5) works in the region of 135 kHz. The fire alarm system for the building (1) has a large number of sensors (3) connected to a bus line (4). The bus line is connected to a central computer (2). There are connections (7,8) between the bus line, the central computer and a communication module (6).

Description

Die vorliegende Erfindung betrifft ein Kommunikationssystem für ein Gebäude, welches ein verdrahtetes Gefahrenbekämpfungssystem mit einer Zentrale und an diese über mindestens eine Linie angeschlossenen Peripheriegeräten aufweist.The present invention relates to a communication system for a building, which has a wired danger control system with a control center and peripheral devices connected to it via at least one line.

Ein derartiges Gefahrenbekämpfungssystem kann beispielsweise eine Brandmeldeanlage mit im Gebäude verteilt angeordneten Brandmeldern sein, die über einen Bus an die Zentrale angeschlossen sind, oder ein elektroakustisches Notfallwarnsystem mit im Gebäude verteilten Lautsprechern zur Durchsage von Evakuierungsinformationen. Selbstverständlich ist auch eine Kombination einer Brandmeldeanlage mit einem elektroakustischen Notfallwarnsystem möglich.Such a hazard control system can be, for example, a fire alarm system with fire detectors distributed in the building, which are connected to the control center via a bus, or an electroacoustic emergency warning system with loudspeakers distributed in the building for announcing evacuation information. Of course, a combination of a fire alarm system and an electroacoustic emergency warning system is also possible.

Neben einem elektroakustischen Notfallwarnsystem kann von diesem getrennt ein "Feuerwehrtelefon" vorgesehen sein, über welches die Feuerwehrleute vor Ort mit dem Einsatzleiter in der Zentrale kommunizieren können. Ein solches Feuerwehrtelefon ist fest verdrahtet und weist fest installierte Telefonapparate auf und erfordert daher zusätzliche Investitionen.In addition to an electro-acoustic emergency warning system, a "fire brigade telephone" can be provided separately, via which the firefighters can communicate on site with the head of operations at the headquarters. Such a fire-fighting telephone is hard-wired and has permanently installed telephone sets and therefore requires additional investments.

Ein Funksystem, oder allgemein ein drahtloses Kommunikationssystem, anstatt des Feuerwehrtelefons ist weniger aufwändig, die Funkgeräte sind aber in der Reichweite begrenzt, besonders in grossen Stahlbetongebäuden. So haben beispielsweise beim Terroranschlag am 11.09.2001 in New York mehr als hundert Feuerwehrleute ihr Leben verloren, weil es nicht gelungen ist, sie rechtzeitig zurück zu rufen. Der Grund dafür waren in erster Linie Schwierigkeiten, mit dem zur Verfügung stehenden Sprechfunk die Struktur der Gebäude zu durchdringen. Es ist auch bekannt, bei einem Funksystem im Gebäude ein Koaxialkabel als Antenne zu verlegen, so dass die Funkgeräte nur noch die Distanz zum Koaxialkabel überbrücken müssen. Aber auch das Koaxialkabel ist eine zusätzliche und kostspielige Investition.A radio system, or generally a wireless communication system, instead of the fire-fighting telephone is less complex, but the radio devices are limited in range, especially in large reinforced concrete buildings. For example, more than a hundred firefighters lost their lives in the terrorist attack in New York on September 11, 2001 because they were unable to call them back in time. The main reason for this was the difficulty in penetrating the structure of the buildings with the available radio. It is also known to lay a coaxial cable as an antenna in a radio system in the building, so that the radio devices only have to bridge the distance to the coaxial cable. But the coaxial cable is also an additional and costly investment.

Durch die Erfindung soll nun ein Kommunikationssystem der eingangs genannten Art angegeben werden, welches alle Vorteile eines Funksystems, also insbesondere geringe zusätzliche Installationskosten, aufweist, und welches die Struktur von Gebäuden mit Sicherheit durchdringt.The invention is intended to provide a communication system of the type mentioned at the outset, which has all the advantages of a radio system, in particular low additional installation costs, and which penetrates the structure of buildings with certainty.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass die mindestens eine Linie des Gefahrenbekämpfungssystems als Antenne für induktive Übertragung verwendet wird, und dass tragbare induktive Empfänger für die übertragenen Kommunikationssignale vorgesehen sind.This object is achieved according to the invention in that the at least one line of the hazard control system is used as an antenna for inductive transmission, and in that portable inductive receivers are provided for the transmitted communication signals.

Vorzugsweise erfolgt die induktive Übertragung im Frequenzbereich unterhalb von 135 kHz. Eine bevorzugte Ausführungsform des erfindungsgemässen Kommunikationssystems ist dadurch gekennzeichnet, dass das Gefahrenbekämpfungssystem durch eine Brandmeldeanlage mit peripher im Gebäude verteilten und mit der Zentrale über mindestens eine Melderlinie verbundenen Brandmeldern gebildet ist, und dass mindestens ein Anschluss vorgesehen ist, mit dem die mindestens eine Melderlinie für die Einspeisung eines Kommunikationssignals auftrennbar ist.The inductive transmission preferably takes place in the frequency range below 135 kHz. A preferred embodiment of the communication system according to the invention is characterized in that the hazard control system is formed by a fire detection system with fire detectors distributed peripherally in the building and connected to the control center via at least one detector line, and that at least one connection is provided with which the at least one detector line for the Feeding a communication signal is separable.

Beim erfindungsgemässen Kommunikationssystem werden also die ohnehin vorhandenen Linien eines Gefahrenbekämpfungssystems, vorzugsweise die Melderlinien einer Brandmeldeanlage, für die Kommunikation mit im Gebäude verteilten und/oder in diesem zirkulierenden Personen verwendet. Wenn diese Personen beispielsweise Feuerwehrleute sind, dann tragen diese die Empfänger mit sich und sind an jedem Ort des Gebäudes mit Sicherheit erreichbar. Denn in dem genannten Frequenzbereich von unter 135 kHz sind verhältnismässig hohe Signalstärken zulässig. Empfangsstörungen der Kommunikationssignale könnten am ehesten durch Bildschirme verursacht werden. Da aber im Brandfall das Gebäude ohnehin stromlos gemacht werden sollte und sich die Feuerwehrleute eher in Gängen und Treppenhäusern aufhalten, ist diese Störungsquelle eher von untergeordneter Bedeutung.In the communication system according to the invention, the existing lines of a hazard control system, preferably the detector lines of a fire alarm system, are used for communication with people distributed in and / or circulating in the building. If these people are firefighters, for example, then they carry the receivers with them and are safely reachable from anywhere in the building. This is because relatively high signal strengths are permissible in the frequency range below 135 kHz. The most likely cause of interference in communication signals could be screens. However, since the building should be de-energized in the event of a fire and the firefighters tend to be in corridors and stairwells, this source of interference is of minor importance.

Eine weitere bevorzugte Ausführungsform des erfindungsgemässen Kommunikationssystems ist dadurch gekennzeichnet, dass die Einspeisung der Kommunikationssignale durch mindestens einen fest installierten Sender oder ein transportables Gerät erfolgt. Das transportable Gerät ist vorzugsweise durch einen Personal Computer gebildet und der mindestens eine Anschluss ist vorzugsweise in der Zentrale oder auf der mindestens einen Melderlinie vorgesehen.A further preferred embodiment of the communication system according to the invention is characterized in that the communication signals are fed in by at least one permanently installed transmitter or a portable device. The transportable device is preferably formed by a personal computer and the at least one connection is preferably provided in the control center or on the at least one detector line.

Gemäss einer weiteren bevorzugten Ausführungsform sind mehrere Anschlüsse vorgesehen, von denen sich einer in der Zentrale und mindestens einer auf der mindestens einen Melderlinie befindet. Vorzugsweise erfolgt eine redundante induktive Übertragung auf verschiedenen Frequenzen.According to a further preferred embodiment, a plurality of connections are provided, one of which is located in the control center and at least one on the at least one detector line. A redundant inductive transmission on different frequencies is preferably carried out.

Die Erfindung betrifft weiter eine Verwendung des genannten Kommunikationssystems für die Kommunikation mit Einsatzkräften, insbesondere Feuerwehrleuten, wobei die tragbaren Empfänger von den Feuerwehrleuten mitgeführt werden.The invention further relates to the use of the communication system mentioned for communication with emergency services, in particular firefighters, the portable receivers being carried by the firefighters.

Im folgenden wird die Erfindung anhand eines in der einzigen Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Die Zeichnung zeigt eine schematische Darstellung einer in einem Gebäude installierten Brandmeldeanlage, wobei anstatt der Brandmeldeanlage auch ein anderes Gefahrenbekämpfungssystem wie beispielsweise ein elektroakustisches Notfallwarnsystem vorgesehen sein kann. Wesentlich ist, dass die Brandmeldeanlage beziehungsweise das Gefahrenbekämpfungssystem über eine Zentrale und an diese über mindestens eine in Form einer Schleife verlegte Linie angeschlossene Peripheriegeräte verfügt.The invention is explained in more detail below on the basis of an exemplary embodiment shown in the single drawing. The drawing shows a schematic representation of a fire alarm system installed in a building, wherein instead of the fire alarm system, another hazard control system, such as an electroacoustic emergency warning system, can also be provided. It is essential that the fire alarm system or the hazard control system has a control center and at least one peripheral connected to it in the form of a loop.

Die mit dem Bezugszeichen 1 bezeichnete Brandmeldeanlage besteht im wesentlichen aus einer Zentrale 2 und aus in dem zu schützenden Gebäude installierten Brandmeldern 3, die an eine in Form einer Schleife verlegte Melderlinie 4 angeschlossen sind, über welche die Stromversorgung der Brandmelder 3 und deren Kommunikation mit der Brandmeldezentrale 2 erfolgt. Die letztere befindet sich in einem Kommandoraum, in welchem im Brandfall der Einsatzleiter der Feuerwehr stationiert ist. Je nach Grösse des Gebäudes sind an die Zentrale 2 mehrere Melderlinien 4 angeschlossen. Die Feuerwehrleute führen Empfänger 5 für den Empfang induktiv übertragener Kommunikationssignale im Frequenzbereich unter 135 kHz mit sich. Dieser Frequenzbereich ist unter anderem aufgrund von gesetzlichen Vorschriften gewählt.The fire alarm system designated by the reference number 1 essentially consists of a control center 2 and fire detectors 3 installed in the building to be protected, which are connected to a detector line 4 laid in the form of a loop, via which the power supply to the fire detectors 3 and their communication with the Fire alarm center 2 takes place. The latter is located in a command room in which the fire department's head of operations is stationed in the event of a fire. Depending on the size of the building, several detector lines 4 are connected to the control center 2. The firefighters carry receiver 5 with them for receiving inductively transmitted communication signals in the frequency range below 135 kHz. This frequency range is chosen, among other things, due to legal regulations.

Mit dem Bezugszeichen 6 ist ein Gerät bezeichnet, mit welchem Kommunikationssignale in die Melderlinie 4 eingespeist werden können. Das Gerät 6 ist ein transportabler oder fest eingebauter Sender, der im letzteren Fall vorzugsweise an die Zentrale 2 angeschlossen ist. Im Fall eines transportablen Senders weist die Zentrale 2 und/oder die Melderlinie 4 an geeigneten Stellen Anschlüsse 7 auf, mit denen die Melderlinie 4 aufgetrennt werden kann. Die Verbindung des beispielsweise durch einen PC gebildeten Geräts 6 mit den Anschlüssen 7 ist durch eine gestrichelte Linie 8 angedeutet. Da die Melder 3 so gebaut sind, dass sie auch bei Anwesenheit von starken Störsignalen zuverlässig funktionieren, werden sie bei der Einspeisung und Übertragung von Kommunikationssignalen in Betrieb bleiben können.The reference numeral 6 designates a device with which communication signals can be fed into the detector line 4. The device 6 is a portable or permanently installed transmitter, which in the latter case is preferably connected to the control center 2. In the case of a portable transmitter, the control center 2 and / or the detector line 4 has connections 7 at suitable points, by means of which the detector line 4 can be separated. The connection of the device 6, which is formed, for example, by a PC, to the connections 7 is indicated by a broken line 8. Since the detectors 3 are constructed in such a way that they function reliably even in the presence of strong interference signals, they will be able to remain in operation during the feeding and transmission of communication signals.

Gegenüber Funkübertragung im VHF- und UHF-Bereich hat die in induktive Übertragung eine Reihe von Vorteilen:

  • Die Empfänger 5 sind wesentlich kleiner.
  • Die Empfänger 5 können mit einer Primärbatterie betrieben werden, deren Lebensdauer mindestens 1 Jahr beträgt.
  • Niederfrequente Signale durchdringen des Gebäude wesentlich besser, so dass die Abdeckung mit Ausnahme der unmittelbaren Umgebung von Bildschirmen sehr gut ist. Da die Bildschirme im Brandfall wegen Stromabschaltung nicht in Betrieb sind, und die Feuerwehrleute sich nicht an den Bildschirmen aufhalten, ist die Nichtabdeckung in der Umgebung der Bildschirme eher sekundär.
  • Bei Übertragung in dem für induktive Anwendungen vorgesehenen Frequenzband von 125 bis 135 kHz sind relativ hohe Signalstärken zulässig.
Compared to radio transmission in the VHF and UHF range, inductive transmission has a number of advantages:
  • The receivers 5 are much smaller.
  • The receiver 5 can be operated with a primary battery, the lifespan of which is at least 1 year.
  • Low-frequency signals penetrate the building much better, so that the coverage is very good, with the exception of the immediate vicinity of screens. Since the screens are not operational in the event of a fire due to a power cut and the firefighters are not on the screens, the non-coverage in the vicinity of the screens is rather secondary.
  • When transmitting in the frequency band of 125 to 135 kHz intended for inductive applications, relatively high signal strengths are permissible.

Im einfachsten Fall werden an die Empfänger 5 nur alphanumerische Meldungen übermittelt, wobei aber die Übertragung von Sprache oder anderen Signalen nicht ausgeschlossen ist. Bei Verbindung des Geräts mit einem Anschluss 7 auf der Melderlinie 4 ist es auch möglich, Signale an die Zentrale 2 zu übertragen.In the simplest case, only alphanumeric messages are transmitted to the receiver 5, but the transmission of voice or other signals is not excluded. When the device is connected to a connection 7 on the detector line 4, it is also possible to transmit signals to the control center 2.

Claims (10)

Kommunikationssystem für ein Gebäude, welches ein verdrahtetes Gefahrenbekämpfungssystem mit einer Zentrale (2) und an diese über mindestens eine Linie angeschlossenen Peripheriegeräten aufweist, dadurch gekennzeichnet, dass die mindestens eine Linie des Gefahrenbekämpfungssystems als Antenne für induktive Übertragung verwendet wird, und dass tragbare induktive Empfänger (5) für die übertragenen Kommunikationssignale vorgesehen sind.Communication system for a building, which has a wired danger control system with a control center (2) and peripheral devices connected to it via at least one line, characterized in that the at least one line of the danger control system is used as an antenna for inductive transmission, and that portable inductive receivers ( 5) are provided for the transmitted communication signals. Kommunikationssystem nach Anspruch 1, dadurch gekennzeichnet, dass die induktive Übertragung im Frequenzbereich unterhalb von 135 kHz erfolgt.Communication system according to claim 1, characterized in that the inductive transmission takes place in the frequency range below 135 kHz. Kommunikationssystem nach Anspruch 2, dadurch gekennzeichnet, dass das Gefahrenbekämpfungssystem durch eine Brandmeldeanlage (1) mit peripher im Gebäude verteilten und mit der Zentrale (2) über mindestens eine Melderlinie (4) verbundenen Brandmeldern (3) gebildet ist, und dass mindestens ein Anschluss (7) vorgesehen ist, mit dem die mindestens eine Melderlinie (4) für die Einspeisung eines Kommunikationssignals auftrennbar ist.Communication system according to claim 2, characterized in that the hazard control system is formed by a fire alarm system (1) with fire detectors (3) distributed peripherally in the building and connected to the control center (2) via at least one detector line (4), and in that at least one connection ( 7) is provided, with which the at least one detector line (4) can be separated for feeding in a communication signal. Kommunikationssystem nach Anspruch 3, dadurch gekennzeichnet, dass die Einspeisung der Kommunikationssignale durch mindestens einen fest installierten Sender oder ein transportables Gerät (6) erfolgt.Communication system according to claim 3, characterized in that the communication signals are fed in by at least one permanently installed transmitter or a portable device (6). Kommunikationssystem nach Anspruch 4, dadurch gekennzeichnet, dass das transportable Gerät (6) durch einen Personal Computer gebildet ist.Communication system according to claim 4, characterized in that the transportable device (6) is formed by a personal computer. Kommunikationssystem nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass der mindestens eine Anschluss (7) in der Zentrale (2) vorgesehen ist.Communication system according to one of claims 3 to 5, characterized in that the at least one connection (7) is provided in the center (2). Kommunikationssystem nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass der mindestens eine Anschluss (7) auf der mindestens einen Melderlinie (4) vorgesehen ist.Communication system according to one of claims 3 to 5, characterized in that the at least one connection (7) is provided on the at least one detector line (4). Kommunikationssystem nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass mehrere Anschlüsse (7) vorgesehen sind, von denen sich einer in der Zentrale (2) und mindestens einer auf der mindestens einen Melderlinie (4) befindet.Communication system according to one of claims 3 to 5, characterized in that a plurality of connections (7) are provided, one of which is located in the control center (2) and at least one on the at least one detector line (4). Kommunikationssystem nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass eine redundante induktive Übertragung auf verschiedenen Frequenzen erfolgt.Communication system according to one of claims 1 to 8, characterized in that a redundant inductive transmission takes place on different frequencies. Verwendung des Kommunikationssystems nach einem der Ansprüche 1 bis 9 für die Kommunikation mit Einsatzkräften, insbesondere Feuerwehrleuten, wobei die tragbaren Empfänger (5) von den Feuerwehrleuten mitgeführt werden.Use of the communication system according to one of claims 1 to 9 for communication with emergency services, in particular firefighters, the portable receivers (5) being carried by the firefighters.
EP03006325A 2003-03-20 2003-03-20 Communication system for a building and use of communication system Withdrawn EP1460596A1 (en)

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EP03006325A EP1460596A1 (en) 2003-03-20 2003-03-20 Communication system for a building and use of communication system

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EP03006325A EP1460596A1 (en) 2003-03-20 2003-03-20 Communication system for a building and use of communication system

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829302A1 (en) * 1978-07-04 1980-01-17 Gerhard Krause Alarm signal transmission over central heating pipes - has transformers for signal transmission using piping as primary and secondary coils in coupled system
EP0630070A1 (en) * 1993-05-29 1994-12-21 Yoshiro Niki Leaky antenna for personal communications system
US5927342A (en) * 1997-12-23 1999-07-27 Motorola, Inc. Fire hose including an integral radiating antenna

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829302A1 (en) * 1978-07-04 1980-01-17 Gerhard Krause Alarm signal transmission over central heating pipes - has transformers for signal transmission using piping as primary and secondary coils in coupled system
EP0630070A1 (en) * 1993-05-29 1994-12-21 Yoshiro Niki Leaky antenna for personal communications system
US5927342A (en) * 1997-12-23 1999-07-27 Motorola, Inc. Fire hose including an integral radiating antenna

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