TREA

Alarm systems in which the location of the alarm condition is signalled to a central station

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Industry

  • CPC
  • G08B25/00
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Parent Industries

GPHYSICS G08Signaling G08BSIGNALLING OR CALLING SYSTEMS ORDER TELEGRAPHS ALARM SYSTEMS

Current Industry

G08B25/00Alarm systems in which the location of the alarm condition is signalled to a central station

Sub Industries

G08B25/001Alarm cancelling procedures or alarm forwarding decisions G08B25/002Generating a prealarm to the central station G08B25/003Address allocation methods and details G08B25/004Alarm propagated along alternative communication path or using alternative communication medium according to a hierarchy of available ways to communicate G08B25/005Alarm destination chosen according to a hierarchy of available destinations G08B25/006Alarm destination chosen according to type of event G08B25/007Details of data content structure of message packets; data protocols G08B25/008Alarm setting and unsetting G08B25/009Signalling of the alarm condition to a substation whose identity is signalled to a central station G08B25/01characterised by the transmission medium G08B25/012using recorded signals G08B25/014Alarm signalling to a central station with two-way communication G08B25/016Personal emergency signalling and security systems G08B25/018Sensor coding by detecting magnitude of an electrical parameter G08B25/04using a single signalling line G08B25/045with sensing devices and central station in a closed loop G08B25/06using power transmission lines G08B25/08using communication transmission lines G08B25/085using central distribution transmission lines G08B25/10using wireless transmission systems G08B25/12Manually actuated calamity alarm transmitting arrangements emergency non-personal manually actuated alarm, activators G08B25/14Central alarm receiver or annunciator arrangements
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