Telephonic communications – Subscriber line or transmission line interface – Network interface device
Reexamination Certificate
2006-08-29
2006-08-29
Anderson, Matthew (Department: 2618)
Telephonic communications
Subscriber line or transmission line interface
Network interface device
C379S387010, C379S388060, C379S395010, C379S399010
Reexamination Certificate
active
07099463
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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Daniel Dove, Powerpoint Presentation: “Power over the DTE” Jan. 2000.
Robert Muir, Powerpoint Presentation: “Update on Diode Discovery Process” May 2, 2000.
Anderson Matthew
Cisco Technology Inc.
Pham Tuan
Ritchie David B.
Thelen Reid & Priest LLP
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