United States Patent 7,664,136
Toebes ,   et al. February 16, 2010

Inline power for multiple devices in a wired data telecommunications network


A power sourcing equipment-powered device (PSE-PD) combination unit requests inline power from a connected PSE or other PSE-PD combination unit by having the PD portion of the PD-PSE combination unit adapt its electrical characteristics, if necessary, to obtain the maximum power available. The PD-PSE combination device keeps track of available power less power consumed locally with a summation unit. A PSE manager unit grants PD power requests from downstream devices based upon the available power left (e.g., original PSE power less losses less local consumption).

Inventors: Toebes; John Albert (Cary, NC), Li; Ping (Fremont, CA), Cham; Jack C. (San Leandro, CA)
Assignee: Cisco Technology, Inc. (San Jose, CA)
Appl. No.: 11/144,094
Filed: June 2, 2005

Full patent text at USPTO