US0089.02760B2
`
`(12) United States Patent
`Austermann, III et al.
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 8,902,760 B2
`Dec. 2, 2014
`
`(54)
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`(75)
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`(73)
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`(*)
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`NETWORKSYSTEMAND OPTIONAL
`TETHERS
`
`Inventors: John F. Austermann, III, Huntington
`Woods, MI (US); Marshall B.
`Cummings, Troy, MI (US)
`Assignee: ChriMar Systems, Inc., Farmington
`Hills, MI (US)
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`Appl. No.: 13/615,755
`Filed:
`Sep. 14, 2012
`
`Notice:
`
`Prior Publication Data
`US 2013/OOO2O47 A1
`Jan. 3, 2013
`
`Related U.S. Application Data
`Continuation of application No. 13/370,918, filed on
`Feb. 10, 2012, which is a continuation of application
`No. 12/239,001, filed on Sep. 26, 2008, now Pat. No.
`8,155.012, which is a continuation of application No.
`10/668,708, filed on Sep. 23, 2003, now Pat. No.
`7,457.250, which is a continuation of application No.
`09/370.430, filed on Aug. 9, 1999, now Pat. No.
`6,650,622, which is a continuation-in-part of
`application No. PCT/US99/07846, filed on Apr. 8,
`1999.
`Provisional application No. 60/081,279, filed on Apr.
`10, 1998.
`
`(2006.01)
`(2006.01)
`(2006.01)
`(2006.01)
`
`Int. C.
`H04L 2/2
`G08B I3/14
`H04L I/24
`H04B 3/54
`U.S. C.
`CPC. H04L 1/24 (2013.01); H04B 3/54 (2013.01);
`H04B 2203/5445 (2013.01); H04B 2203/5458
`(2013.01); H04B 2203/5466 (2013.01); H04B
`2203/547 (2013.01); H04B 2203/5491
`(2013.01); H04B 2203/5495 (2013.01)
`USPC ......................... 370/241; 370/463: 340/568.1
`
`(58) Field of Classification Search
`None
`See application file for complete search history.
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`202,495 A
`244,426 A
`
`4, 1878 Watson
`7, 1881 Bell
`(Continued)
`
`FOREIGN PATENT DOCUMENTS
`
`CA
`CN
`
`2, 1998
`21831.06 A1
`1, 1990
`2050662 U.
`(Continued)
`OTHER PUBLICATIONS
`
`“10BaseT Takes Off” (LAN Magazine, May 1991).
`(Continued)
`Primary Examiner — Chi H Pham
`Assistant Examiner — Soon-Dong D Hyun
`(74) Attorney, Agent, or Firm — Harness, Dickey & Pierce,
`P.L.C.
`
`ABSTRACT
`(57)
`A BaseT Ethernet system having a piece of central network
`equipment, a piece of BaseT Ethernet terminal equipment,
`and data signaling pairs of conductors having first and second
`pairs used to carry BaseT Ethernet communication signals
`between the piece of central network equipment and the piece
`of BaseT Ethernet terminal equipment. The first and second
`pairs physically connect between the piece of BaseTEthernet
`terminal equipment and the piece of central network equip
`ment. The piece of central network equipment having at least
`one DC supply. The piece of BaseT Ethernet terminal equip
`ment having at least one path to draw different magnitudes of
`current flow from the DC supply through a loop formed over
`at least one of the conductors of the first pair and at least one
`of the conductors of the second pair. The piece of central
`network equipment to detectat least two different magnitudes
`of the current flow through the loop.
`
`219 Claims, 13 Drawing Sheets
`
`
`
`- it; --E
`to T.
`8-- -...-
`it::it:Et
`... pepsi
`
`?
`
`i
`3:
`
`1
`
`CISCO 1004
`Cisco v. ChriMar
`
`

`

`(56)
`
`References Cited
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`CISCO 1004
`Cisco v. ChriMar
`
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`(56)
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`
`3
`
`CISCO 1004
`Cisco v. ChriMar
`
`

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`US 8,902.760 B2
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`“ANSI/IEEE STD 802.5-1998E Information technology Tele
`communications and information exchange between systems—Lo
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`“ANSI INCITS 229-1994 (R1999)” “For Information Systems
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`“ANSI X3.166-1990” “For Information Systems’ "Fibre Dis
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`“ANSI X3.166-1990” “For Information Technology”, “Fibre
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`“ANSIX3.263-1995” “For Information Technology” Fibre Dis
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`“A proposal for a Low-Cost FDDI UTP/STP PMD Standard” by
`Mario MaZZola, Crescendo Communications 31 pages (Oct. 15,
`1991).
`
`6
`
`CISCO 1004
`Cisco v. ChriMar
`
`

`

`US 8,902.760 B2
`Page 7
`
`(56)
`
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