Signal and devices for wired networks
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United States of America Patent
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Apr 23, 2013
Grant Date -
Jan 27, 2011
app pub date -
Feb 11, 2009
filing date -
Feb 11, 2008
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A signal for use on a wired network interconnecting electronic devices, comprising: a base voltage for conveying power to the electronic devices; a pulsed voltage signal bearing coded information for transfer between the electronic devices; and a digital signal superimposed onto selected portions of the pulsed voltage signal, wherein the digital signal comprises a carrier signal modulated by a data signal for transfer between the electronic devices. This is used in fire alarm networks, for example, to convey multimedia or other data such as control signals, whilst maintaining compatibility with existing protocols using the pulsed voltage signal.
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