Method and apparatus for detecting a compatible phantom powered device using common mode signaling
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United States of America Patent
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Oct 12, 2004
Grant Date -
N/A
app pub date -
Nov 9, 2000
filing date -
Nov 9, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and an apparatus provide for determining whether a data terminal equipment (DTE) device represents a compatible device lacking an independent power supply and adapted to be powered using phantom power over a wired connection from a communications device such as a switch. A detection signal may be transmitted from the communications device to an identity network connected to the DTE. A response detection signal may be returned and checked in a receiver at the communications device. A switch may then be closed to provide phantom power if the result of the check indicates that the DTE is a compatible device adapted to receive phantom power. Compatible DTE device may include telephones, Voice over IP (VoIP, IP or Ethernet) telephones, network access devices, computers, and the like.
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