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`US006218930Cl
`c12) EX PARTE REEXAMINATION CERTIFICATE (10326th)
`United States Patent
`US 6,218,930 Cl
`c1o) Number:
`Katzenberg et al.
`(45) Certificate Issued:
`Oct. 14, 2014
`
`(54) APPARATUS AND METHOD FOR
`REMOTELY POWERING ACCESS
`EQUIPMENT OVER A 10/100 SWITCHED
`ETHERNET NETWORK
`
`(75)
`
`Inventors: Boris Katzenberg, Trumbull, CT (US);
`JosephA. Deptula, Watertown, CT (US)
`
`(73) Assignee: Network-1 Security Solutions, Inc.,
`Framingham, MA (US)
`
`Reexamination Request:
`No. 90/012,401, Jul. 20, 2012
`
`Reexamination Certificate for:
`Patent No.:
`6,218,930
`Issued:
`Apr. 17, 2001
`Appl. No.:
`09/520,350
`Filed:
`Mar. 7, 2000
`
`Related U.S. Application Data
`
`(60) Provisional application No. 60/123,688, filed on Mar.
`10, 1999.
`
`(51)
`
`Int. Cl.
`H04L 12110
`
`(2006.01)
`
`(52) U.S. Cl.
`USPC ..................... 370/200; 340/12.32; 340/12.37;
`340/12.38; 379/386; 379/400
`(58) Field of Classification Search
`None
`See application file for complete search history.
`References Cited
`
`(56)
`
`To view the complete listing of prior art documents cited
`during the proceeding for Reexamination Control Number
`90/012,401, please refer to the USPTO's public Patent
`Application Information Retrieval (PAIR) system under the
`Display References tab.
`
`Primary Examiner- Simon Ke
`
`(57)
`ABSTRACT
`Apparatus for remotely powering access equipment over a
`10/100 switched Ethernet network comprises an Ethernet
`switch card with a phantom power supply for remote access
`equipment and added circuitry for automatic detection of
`remote equipment being connected to the network; determin(cid:173)
`ing whether the remote equipment is capable of accepting
`remote power in a non-intrusive manner; delivering the phan(cid:173)
`tom power to the remote equipment over the same wire pairs
`that deliver the data signals, and automatically detecting if the
`remote equipment is removed from the network.
`
`10
`
`Remote Access
`Equipment
`
`14
`
`Network Data
`
`Node
`
`To Network
`
`16
`
`Power Source
`
`18
`
`20
`
`32
`
`j ra
`
`AID Converter
`and
`Microprocessor
`
`24
`
`22
`
`30
`
`SONY EXHIBIT 1008
`
`Page 1 of 3
`
`

`

`US 6,218,930 Cl
`
`1
`EX PARTE
`REEXAMINATION CERTIFICATE
`ISSUED UNDER 35 U.S. C. 307
`
`THE PATENT IS HEREBY AMENDED AS
`INDICATED BELOW.
`
`Matter enclosed in heavy brackets [ ] appeared in the
`patent, but has been deleted and is no longer a part of the
`patent; matter printed in italics indicates additions made
`to the patent.
`
`AS A RESULT OF REEXAMINATION, IT HAS BEEN
`DETERMINED THAT:
`
`The patentability of claims 6, 8 and 9 is confirmed.
`New claims 10-23 are added and determined to be
`patentable.
`Claims 1-5 and 7 were not reexamined.
`
`15
`
`20
`
`2
`(c) sensing a voltage level on the data signaling pair in
`response to the low level current,
`(d) determining whether the access device is capable of
`accepting remote power based on the sensed voltage
`level, and
`(e) controlling power supplied by said secondary power
`source to said access device in response to a preselected
`condition of said voltage level.
`21. Method for remotely powering access equipment in an
`10 Ethernet data network, comprising,
`(a) providing
`(i) a data node adapted for data switching,
`(ii) an access device adapted for data transmission,
`(iii) at least one data signaling pair connected between
`the data node and the access device and arranged to
`transmit data therebetween,
`(iv) a main power source connected to supply power to
`the data node, and
`( v) a secondary power source arranged to supply power
`from the data node via said data signaling pair to the
`access device,
`(b) delivering a current from said main power source to the
`access device over said data signaling pair, said current
`being insufficient, by itself, to operate said access device
`connected to the data signaling pair;
`(c) sensing a voltage level on the data signaling pair in
`response to the current, and
`(d) controlling power supplied by said secondary power
`source to said access device in response to a preselected
`condition of said voltage level.
`22. Apparatus for remotely powering access equipment in
`a data network, comprising:
`(a) a data node adapted for data switching,
`(b) an access device adapted for data transmission,
`(c) at least one data signaling pair connected between the
`data node and the access device and arranged to trans-
`mit data therebetween,
`(d) a main power source connected to supply power to the
`data node and deliver a low level current from said main
`power source to the access device over said at least one
`data signaling pair resulting in a voltage level on the
`data signaling pair that can be sensed in response to the
`low level current,
`(e) a secondary power source arranged to supply power
`from the data node via said data signaling pair to the
`access device, wherein the power supplied by said sec(cid:173)
`ondary power source to the access device is controlled in
`response to a preselected condition of the sensed voltage
`level.
`23. Method for remotely powering access equipment in an
`Ethernet data network, comprising:
`(a) providing an access device adapted for data transmis(cid:173)
`sion;
`(b) connecting said access device to at least one data
`signaling pair connected between the access device and
`a data node adapted for data switching, wherein said at
`least one data signaling pair is arranged to transmit
`data therebetween;
`(c) receiving at said access device a low level current from
`a main power source over said data signaling pair,
`wherein said main power source is connected to supply
`power to the data node; and wherein a voltage level is
`generated on the data signaling pair in response to the
`low level current;
`(d) producing a voltage level on the data signaling pair in
`response to the low level current, wherein said voltage
`level can be sensed;
`
`10. Method according to claim 6, wherein said data node is
`an Ethernet switch.
`11. Method according to claim 6, wherein said data sig(cid:173)
`naling pair is a pair of wires used to transmit data within an 25
`Ethernet cable.
`12. Method according to claim 6, wherein said low level
`current is a current used to determine whether the access
`device is capable of accepting remote power.
`13. Method according to claim 6, wherein said low level 30
`current is insufficient to operate said access device, but suf(cid:173)
`ficient to generate a voltage level on said data signaling pair
`that is used to determine whether said access device is
`capable of accepting remote power.
`14. Method according to claim 6, wherein controlling 35
`power supplied by the secondary power source involves
`increasing the level of the low level current to a level sufficient
`to operate said access device.
`15. Method according to claim 6, wherein said secondary
`power source is the same source of power as said main power 40
`source.
`16. Method according to claim 6, wherein said secondary
`power source is the same physical device as the main power
`source.
`17. Method according to claim 6, wherein said main power 45
`source provides a DC current flow.
`18. Method according to claim 6, wherein there are at least
`two data signaling pairs connected between the data node
`and the access device.
`19. Method according to claim 6, wherein sensing the 50
`voltage level on the data signaling pair includes at least two
`sensed measurements.
`20. Method for remotely powering access equipment in an
`Ethernet data network, comprising,
`(a) providing
`(i) an Ethernet data node adapted for data switching,
`(ii) an access device adapted for data transmission,
`(iii) at least one data signaling pair connected between
`the data node and the access device and arranged to
`transmit data therebetween,
`(iv) a main power source connected to supply power to
`the data node, and
`( v) a secondary power source arranged to supply power
`from the data node via said data signaling pair to the
`access device,
`(b) delivering a low level current from said main power
`source to the access device over said data signaling pair,
`
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`65
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`55
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`Page 2 of 3
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`US 6,218,930 Cl
`
`3
`(e) receiving at said access device controlled power sup(cid:173)
`plied by a secondary power source arranged to supply
`power from the data node via said data signaling pair to
`the access device, in response to a preselected condition
`of said voltage level.
`* * * * *
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`4
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`Page 3 of 3
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