USOO8942107B2
`
`(12) Unlted States Patent
`Austerman, III et al.
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 8,942,107 B2
`Jan. 27, 2015
`
`(54) PIECE OF ETHERNET TERMINAL
`EQUIPMENT
`
`(75) Inventory JOhn F- Ausmrmans HI: Hunnngton
`Woods, MI (US); Marshall B.
`cummmgs’ Troy’ MI (Us)
`
`(73) Assignee: ICIlTTiNTT/allll'(%yss)tems, Inc., Farmington
`1 s,
`
`( * ) Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`
`1
`)
`(
`21 App . No.: 13/370,918
`
`(22) Filed:
`
`Feb. 10, 2012
`
`(65)
`
`Prior Publication Data
`
`Us 2012/0250784 A1
`
`001- 4’ 2012
`
`Related US. Application Data
`
`USPC ....................... .. 370/241; 370/463; 340/568.1
`(58) Field of Classi?cation Search
`None
`See application ?le 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/l998
`2183106 Al
`1/1990
`2050662 U
`(Continued)
`OTHER PUBLICATIONS
`“IOBaseT Takes on” (LAN Magazine, May 1991).
`
`(continued)
`
`(63) Continuation of application No. 12/239,001, ?led on
`Sep. 26, 2008, noW Pat. No. 8,155,012, which is a
`continuation of application No. 10/668,708, ?led on
`Sep. 23, 2003, noW Pat. No. 7,457,250, Which is a
`continuation of application No. 09/370,430, ?led on
`Aug. 9, 1999, noW Pat. No. 6,650,622, Which is a
`continuation-in-part
`of
`application
`No.
`PCT/US99/07846, ?led on Apr. 8, 1999.
`-
`-
`-
`-
`(60) £1,3mi1951908na1 apphcanon NO' 60/081’279’ ?led on Apr'
`’
`'
`(51) Int C1
`'
`'
`H 041‘ 12/12
`G083 13/14
`H04L 10"
`H04B 3/54
`(52) US. Cl.
`CPC .. H04L 1/24 (2013.01); H043 3/54 (2013.01);
`H043 2203/5445 (2013.01); H043 2203/5453
`(2013.01); H043 2203/5466 (2013.01); H043
`2203/547 (2013.01); H043 2203/5491
`(2013.01); H043 2203/5495 (2013.01)
`
`(200601)
`(2006-01)
`(2006-01)
`(2006-01)
`
`_
`_
`_
`PHI/WW Exam?” T C111 H Pham
`1455151111” Examme" * soon-Dong D Hyun
`(74) Attorney, Agent, or Firm *Harness, Dickey & Pierce,
`P_L_C_
`
`ABSTRACT
`(57)
`A piece of Ethernet terminal equipment having an Ethernet
`connector including ?rst and second pairs of contacts used to
`carry Ethernet communication signals. At least one path for
`the purpose of draWing DC current. The at least one path
`coupled across at least one of the contacts of the ?rst pair of
`contacts and at least one of the contacts of the second pair of
`contacts. The piece of Ethernet terminal equipment to draW
`different magnitudes of DC current ?oW Via the at least one
`path. The different magnitudes of DC current ?ow to result
`from at least one condition applied to at least one of the
`contacts of the ?rst and second pairs of contacts, Wherein at
`least one of the magnitudes of the DC current ?ow to convey
`information about the piece of Ethernet terminal equipment.
`
`125 Claims, 13 Drawing Sheets
`
`Page 1
`
` Dell Inc.
` Exhibit 1023
`
`

`

`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`406,567
`2,846,509
`3,359,379
`3,407,400
`3,408,643
`3,423,521
`3,425,050
`3,500,132
`3,535,472
`3,537,095
`3,593,274
`3,597,549
`3,618,065
`3,634,845
`3,659,277
`3,696,378
`3,697,984
`3,731,012
`3,758,728
`3,768,084
`3,781,481
`3,794,989
`3,818,179
`3,828,139
`3,832,521
`3,832,678
`3,836,901
`3,842,218
`3,848,179
`3,863,036
`3,868,484
`3,886,419
`RE28,692
`3,932,857
`3,969,594
`3,983,338
`4,024,359
`4,024,360
`4,054,760
`4,063,220
`4,064,431
`4,101,878
`4,121,201
`4,128,804
`4,131,767
`4,156,799
`4,160,884
`4,161,719
`4,162,489
`4,173,714
`4,179,688
`4,186,339
`4,191,971
`4,230,912
`4,232,199
`4,254,305
`4,260,882
`4,268,723
`4,273,955
`4,277,740
`4,282,407
`4,290,056
`4,292,480
`4,293,948
`4,303,073
`4,313,081
`4,315,107
`4,322,677
`4,340,788
`4,348,661
`4,349,703
`4,350,849
`4,367,455
`4,383,315
`4,388,667
`
`7/1889
`8/1958
`12/1967
`10/1968
`10/1968
`1/1969
`1/1969
`3/1970
`10/1970
`10/1970
`7/1971
`8/1971
`11/1971
`1/1972
`4/1972
`10/1972
`10/1972
`5/1973
`9/1973
`10/1973
`12/1973
`2/1974
`6/1974
`8/1974
`8/1974
`8/1974
`9/1974
`10/1974
`11/1974
`1/1975
`2/1975
`5/1975
`1/1976
`1/1976
`7/1976
`9/1976
`5/1977
`5/1977
`10/1977
`12/1977
`12/1977
`7/1978
`10/1978
`12/1978
`12/1978
`5/1979
`7/1979
`7/1979
`7/1979
`11/1979
`12/1979
`1/1980
`3/1980
`10/1980
`11/1980
`3/1981
`4/1981
`5/1981
`6/1981
`7/1981
`8/1981
`9/1981
`9/1981
`10/1981
`12/1981
`1/1982
`2/1982
`3/1982
`7/1982
`9/1982
`9/1982
`9/1982
`1/1983
`5/1983
`6/1983
`
`Edison
`Dubuar
`Pullum et al.
`Lurie
`Sliman
`Friesen et al.
`Tellerman et al.
`Garrett
`Babbitt, III
`Cones
`Krugler, Jr.
`Farmer et al.
`Trip et al.
`Colman
`Brown
`Daniel
`Atkinson et al.
`Shaffer
`Le Roch et al.
`Haynes
`Shaffer et al.
`Manley et al.
`Mase
`Chambers, Jr.
`Niendorf
`Gysell et al.
`Matto et al.
`DeLuca et al.
`Kayama
`McCrudden
`Bolton et al.
`Omura et al.
`Highstone et al.
`Way et al.
`DeLuca et al.
`Mathauser
`De Marco et al.
`Biraghi et al.
`Morgen
`Metcalfe et al.
`Cote
`Shimizu et al.
`Weathers
`Russell
`Weinstein
`Cave
`Bishop
`Parikh et al.
`Thilo et al.
`Bloch et al.
`Romney
`Finger
`Dischert et al.
`Lee et al.
`Boatwright et al.
`Treiber
`Barnes
`Taylor
`Armstrong
`Parks
`Stiefel
`Chow
`Sweatt
`Soderblom
`Archibald
`Smith
`Ciesielka et al.
`Wright
`SbuelZ
`Lucchesi
`Chea, Jr.
`Ahuja
`Fried
`Torng
`Saurenman
`
`US 8,942,107 B2
`Page 2
`
`4,397,020
`4,398,066
`4,410,982
`4,413,250
`4,438,298
`4,446,341
`4,454,477
`4,463,352
`4,464,658
`4,467,147
`4,467,314
`4,475,079
`4,479,228
`4,482,999
`4,484,028
`4,487,836
`4,494,541
`4,495,494
`4,507,568
`4,524,349
`4,525,636
`4,527,216
`4,528,667
`4,532,626
`4,535,401
`4,551,671
`4,564,726
`4,571,656
`4,575,714
`4,578,539
`4,586,104
`4,593,389
`4,602,364
`4,611,101
`4,617,656
`4,622,541
`4,629,836
`4,631,367
`4,633,217
`4,636,771
`4,639,714
`4,647,721
`4,647,912
`4,649,548
`4,654,638
`4,654,640
`4,656,318
`4,658,099
`4,658,242
`4,661,797
`4,661,979
`4,670,902
`4,674,084
`4,685,129
`4,686,514
`4,691,344
`4,692,761
`4,701,630
`4,701,946
`4,712,233
`4,717,896
`4,719,616
`4,723,267
`4,728,948
`4,729,125
`4,731,810
`4,731,829
`4,733,223
`4,733,389
`4,736,195
`4,737,787
`4,742,334
`4,751,498
`4,755,792
`4,755,922
`4,758,823
`4,760,382
`4,766,386
`4,771,229
`
`8/1983
`8/1983
`10/1983
`11/1983
`3/1984
`5/1984
`6/1984
`7/1984
`8/1984
`8/1984
`8/1984
`10/1984
`10/1984
`11/1984
`11/1984
`12/1984
`1/1985
`1/1985
`3/1985
`6/1985
`6/1985
`7/1985
`7/1985
`7/1985
`8/1985
`11/1985
`1/1986
`2/1986
`3/1986
`3/1986
`4/1986
`6/1986
`7/1986
`9/1986
`10/1986
`11/1986
`12/1986
`12/1986
`12/1986
`1/1987
`1/1987
`3/1987
`3/1987
`3/1987
`3/1987
`3/1987
`4/1987
`4/1987
`4/1987
`4/1987
`4/1987
`6/1987
`6/1987
`8/1987
`8/1987
`9/1987
`9/1987
`10/1987
`10/1987
`12/1987
`1/1988
`1/1988
`2/1988
`3/1988
`3/1988
`3/1988
`3/1988
`3/1988
`3/1988
`4/1988
`4/1988
`5/1988
`6/1988
`7/1988
`7/1988
`7/1988
`7/1988
`8/1988
`9/1988
`
`Howson
`Sinberg
`Fleischfresser et al.
`Porter et al.
`Rubin
`Rubin
`Joffe
`Forbes et al.
`Thelen
`Rubin
`Weikel et al.
`Gale
`Crane
`Janson et al.
`Kelley et al.
`Takayanagi et al.
`Archibald
`McCune
`Ziegler et al.
`Hyatt
`Kominami et al.
`Stammely
`Fruhauf
`Flores et al.
`Penn
`AnnunZiata et al.
`Ibata
`Ruckman
`Rummel
`Townsing
`Standler
`Wuerurg et al.
`Herman et al.
`Walter et al.
`Kobayashi et al.
`Stockdale
`Walsworth
`Coviello et al.
`Akano
`Ochs
`Crowe
`Busam et al.
`Bates et al.
`Crane
`Clift
`Carll et al.
`Noyes
`Frazer
`Zeder
`Schmall
`Jakab
`NaiWirt
`Suzuki et al.
`Gavrilovich
`Liptak, Jr. et al.
`Brown et al.
`Robinton
`AnnunZiata et al.
`Oliva et al.
`Kuo
`Graham
`Akano
`Jones et al.
`Fields
`Sterling, Jr. et al.
`Watkins
`Bonnet et al.
`Gilbert
`Puvogel
`McMurtry et al.
`Ito et al.
`Teich et al.
`Shalvi et al.
`Pezzolo et al.
`Puvogel
`Berruyer et al.
`Faulkner
`Oliver et al.
`Ziegler
`
`Page 2
`
`

`

`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`4,779,153
`4,782,322
`4,782,355
`4,782,482
`4,785,812
`4,799,211
`4,813,066
`4,815,106
`4,817,106
`4,821,319
`4,823,600
`4,825,349
`4,839,886
`4,862,158
`4,864,598
`4,866,768
`4,875,223
`4,882,728
`4,884,263
`4,884,287
`4,885,563
`4,896,315
`4,901,003
`4,901,217
`4,903,006
`4,907,261
`4,916,621
`4,918,688
`4,922,503
`4,926,158
`4,935,926
`4,935,959
`4,937,811
`4,937,851
`4,942,604
`4,951,309
`4,953,055
`4,958,371
`4,961,222
`4,969,179
`4,973,954
`4,980,913
`4,991,123
`4,992,774
`4,998,275
`4,998,850
`5,003,457
`5,003,579
`5,007,858
`5,020,100
`5,020,773
`5,021,779
`5,029,201
`5,032,819
`5,032,833
`5,033,112
`5,034,723
`5,034,738
`5,034,948
`5,034,978
`5,038,782
`5,051,723
`5,055,827
`5,056,131
`5,059,782
`5,059,948
`5,063,563
`5,063,585
`5,066,939
`5,066,942
`5,073,919
`5,076,763
`5,077,526
`RE33,807
`5,089,974
`
`10/1988
`11/1988
`11/1988
`11/1988
`11/1988
`1/1989
`3/1989
`3/1989
`3/1989
`4/1989
`4/1989
`4/1989
`6/1989
`8/1989
`9/1989
`9/1989
`10/1989
`11/1989
`11/1989
`11/1989
`12/1989
`1/1990
`2/1990
`2/1990
`2/1990
`3/1990
`4/1990
`4/1990
`5/1990
`5/1990
`6/1990
`6/1990
`6/1990
`6/1990
`7/1990
`8/1990
`8/1990
`9/1990
`10/1990
`11/1990
`11/1990
`12/1990
`2/1991
`2/1991
`3/1991
`3/1991
`3/1991
`3/1991
`4/1991
`5/1991
`6/1991
`6/1991
`7/1991
`7/1991
`7/1991
`7/1991
`7/1991
`7/1991
`7/1991
`7/1991
`8/1991
`9/1991
`10/1991
`10/1991
`10/1991
`10/1991
`11/1991
`11/1991
`11/1991
`11/1991
`12/1991
`12/1991
`12/1991
`1/1992
`2/1992
`
`Tsubota
`Lechner et al.
`Sakai et al.
`Kiatipov et al.
`Pihl et al.
`Felker et al.
`HoltZ et al.
`Propp et al.
`Thompson
`Middleton et al.
`Biegel et al.
`Marcel
`Wu et al.
`Keller et al.
`Lynch et al.
`Sinberg
`Curtis
`Herman
`Suzuki
`Jones et al.
`Johnson et al.
`Felker et al.
`Clegg
`Wilson
`Boomgaard
`Chapman
`Bean et al.
`Krause et al.
`Leone
`Zeigler
`Herman
`Markovic et al.
`Harris
`Lynch et al.
`Smith et al.
`Gross et al.
`Douhet et al.
`Damoci et al.
`Johansson et al.
`Kanare et al.
`SchwarZ
`Skret
`Casamassima
`McCullough
`Braunstein et al.
`Crowell
`Ikei et al.
`Jones
`Daly et al.
`Gardiner
`Tuft et al.
`Bisak
`Bindels
`Sakuragi et al.
`Laporte
`Bowling et al.
`Maman
`Ishihara et al.
`Mizutani et al.
`Nguyen et al.
`Gevins et al.
`Long et al.
`Philipp
`Kanare et al.
`Fukuyama
`Desmeules
`Ikeda et al.
`Shapiro
`Mans?eld, Jr.
`Matsuo
`Hagensick
`Anastos et al.
`Vokey et al.
`Abel et al.
`Demeyer et al.
`
`US 8,942,107 B2
`Page 3
`
`5,093,828
`RE33,900
`5,119,398
`5,119,402
`5,121,482
`5,121,500
`5,124,982
`5,131,033
`5,133,005
`5,136,580
`5,142,269
`5,144,544
`5,148,144
`5,164,960
`5,168,170
`5,179,291
`5,179,710
`5,181,240
`5,189,409
`5,192,231
`5,195,183
`5,199,049
`5,200,743
`5,200,877
`5,216,704
`5,222,164
`5,223,806
`5,226,120
`5,231,375
`5,235,599
`5,237,606
`5,241,160
`5,243,328
`5,249,183
`5,255,962
`5,257,287
`5,260,664
`5,264,777
`5,267,238
`5,270,896
`5,275,172
`5,278,888
`5,280,251
`5,285,477
`5,289,359
`5,289,458
`5,289,461
`5,297,141
`5,301,246
`5,302,889
`5,306,956
`5,311,114
`5,311,518
`5,313,642
`5,315,237
`5,319,363
`5,321,372
`5,323,461
`5,333,177
`5,333,192
`5,336,946
`5,345,422
`5,345,592
`5,347,225
`5,351,272
`5,353,009
`5,357,145
`5,365,515
`5,368,041
`5,379,441
`5,381,804
`5,384,429
`5,389,882
`5,391,932
`5,396,555
`5,406,260
`5,408,669
`5,414,708
`5,414,709
`
`3/1992
`4/1992
`6/1992
`6/1992
`6/1992
`6/1992
`6/1992
`7/1992
`7/1992
`8/1992
`8/1992
`9/1992
`9/1992
`11/1992
`12/1992
`1/1993
`1/1993
`1/1993
`2/1993
`3/1993
`3/1993
`3/1993
`4/1993
`4/1993
`6/1993
`6/1993
`6/1993
`7/1993
`7/1993
`8/1993
`8/1993
`8/1993
`9/1993
`9/1993
`10/1993
`10/1993
`ll/l993
`11/1993
`11/1993
`12/1993
`1/1994
`1/1994
`1/1994
`2/1994
`2/1994
`2/1994
`2/1994
`3/1994
`4/1994
`4/1994
`4/1994
`5/1994
`5/1994
`5/1994
`5/1994
`6/1994
`6/1994
`6/1994
`7/1994
`7/1994
`8/1994
`9/1994
`9/1994
`9/1994
`9/1994
`10/1994
`10/1994
`11/1994
`11/1994
`1/1995
`1/1995
`1/1995
`2/1995
`2/1995
`3/1995
`4/1995
`4/1995
`5/1995
`5/1995
`
`Braun et al.
`Howson
`Webber, Jr.
`Gianurg et al.
`Patton
`Arlington et al.
`Kaku
`Reum
`Kelley et al.
`Videlock et al.
`Mueller
`Jenneve et al.
`Sutterlin et al.
`Wincn et al.
`Hartig
`Nishikawa et al.
`Coschieri
`Sakuragi et al.
`Okuno
`Dolin, Jr.
`Miller et al.
`Wilson
`St. Martin et al.
`Betton et al.
`Williams et al.
`Bass, Sr. et al.
`Curtis et al.
`Brown et al.
`Sanders et al.
`Nishimura et al.
`Ziermann
`Bashan et al.
`Lee et al.
`Wong et al.
`Neuhaus et al.
`Blumenthal et al.
`Graham
`Smead
`Yano et al.
`McDonald
`Ives
`Myllyrnaki
`Strangio
`Leonowich
`Ziermann
`Taha
`de Nijs
`Marum
`Archibald et al.
`Marsh
`Ikeda et al.
`Sambamurthy et al.
`Takato et al.
`Seigel
`Iwakura et al.
`Welch et al.
`Smith
`Rosenbaum et al.
`Braitberg et al.
`McGinn
`Segaram et al.
`RedWine
`Woodmas
`Graham
`Abraham
`Marsh et al.
`Segaram
`Graham
`Shambroom
`Watanabe et al.
`Shambroom
`Bulson et al.
`I’Anson et al.
`Small et al.
`Shibata et al.
`Cummings et al. ...... .. 340/568.2
`Stewart et al.
`Webber et al.
`Baze
`
`Page 3
`
`

`

`US 8,942,107 B2
`Page 4
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`5,420,572
`5,422,519
`5,424,710
`5,432,505
`5,438,606
`5,440,335
`5,441,520
`5,444,184
`5,444,856
`5,446,914
`5,448,565
`5,450,486
`5,451,923
`5,452,344
`5,455,467
`5,457,629
`5,459,283
`5,461,671
`5,467,061
`5,467,384
`5,469,437
`5,477,091
`5,483,574
`5,483,656
`5,485,488
`5,488,306
`5,491,463
`5,493,684
`5,497,460
`5,498,911
`5,513,370
`5,514,859
`5,515,303
`5,517,172
`5,519,882
`5,523,747
`5,526,349
`5,528,248
`5,528,507
`5,528,661
`5,531,611
`5,532,898
`5,535,336
`5,537,468
`5,540,235
`5,541,957
`5,548,466
`5,560,022
`5,560,357
`5,563,489
`5,568,525
`5,570,002
`5,572,182
`5,574,748
`5,577,023
`5,577,026
`5,578,991
`5,581,772
`5,586,054
`5,594,332
`5,594,732
`5,596,473
`5,596,637
`5,608,545
`5,608,792
`5,610,593
`5,617,418
`5,623,184
`5,630,058
`5,631,570
`5,631,846
`5,635,896
`5,642,248
`5,645,434
`5,649,001
`
`5/1995
`6/1995
`6/1995
`7/1995
`8/1995
`8/1995
`8/1995
`8/1995
`8/1995
`8/1995
`9/1995
`9/1995
`9/1995
`9/1995
`10/1995
`10/1995
`10/1995
`10/1995
`11/1995
`11/1995
`11/1995
`12/1995
`1/1996
`1/1996
`1/1996
`1/1996
`2/1996
`2/1996
`3/1996
`3/1996
`4/1996
`5/1996
`5/1996
`5/1996
`5/1996
`6/1996
`6/1996
`6/1996
`6/1996
`6/1996
`7/1996
`7/1996
`7/1996
`7/1996
`7/1996
`7/1996
`8/1996
`9/1996
`10/1996
`10/1996
`10/1996
`10/1996
`11/1996
`11/1996
`11/1996
`11/1996
`11/1996
`12/1996
`12/1996
`1/1997
`1/1997
`1/1997
`1/1997
`3/1997
`3/1997
`3/1997
`4/1997
`4/1997
`5/1997
`5/1997
`5/1997
`6/1997
`6/1997
`7/1997
`7/1997
`
`Dolin, Jr. et al.
`Russell
`Baumann
`Wise
`Cerulli
`Beveridge
`Olsen et al.
`Hassel
`Bowers et al.
`Paul et al.
`Chang et al.
`Maas et al.
`Seberger et al.
`Larson
`Young et al.
`Miller et al.
`Birdwell, Jr.
`Sakuragi et al.
`Aden et al.
`Skinner, Sr.
`Runaldue
`Fiorina et al.
`Yuyama
`Oprescu et al.
`Van Brunt et al.
`Bonaccio
`Sargeant et al.
`Gephardt et al.
`Bailey et al.
`Bossler et al.
`Paul
`Seigel
`Cargin, Jr. et al.
`Chiu
`Asano et al.
`Wise
`DiaZ et al.
`Steiner et al.
`McNamara et al.
`Siu et al.
`Reed et al.
`Price
`Smith et al.
`Hartmann
`Wilson
`Lau
`Smith
`Dunstan et al.
`Faupel et al.
`Murry
`de Nijs et al.
`Castleman
`De Pinho Filho et al.
`Vander Mey et al.
`Marum et al.
`Gordon et al.
`Scholder
`Nanno et al.
`Jensen et al.
`Harman et al.
`Bell et al.
`Johnson et al.
`Pasetti et al.
`Kagawa
`Laidler
`Seto
`Shirani et al.
`Rector
`Mosley et al.
`King
`Szurkowski
`Tinsley et al.
`Campolo et al.
`Leung
`Thomas et al.
`
`5,652,479
`5,652,575
`5,652,893
`5,652,895
`5,655,077
`5,659,542
`5,664,002
`5,670,937
`5,671,354
`5,675,321
`5,675,371
`5,675,811
`5,675,813
`5,678,547
`5,678,559
`5,679,987
`5,684,826
`5,684,950
`5,686,826
`5,687,174
`5,689,230
`5,692,917
`5,696,660
`5,706,287
`5,715,174
`5,715,287
`5,729,154
`5,729,204
`5,742,216
`5,742,514
`5,742,833
`5,756,280
`5,758,101
`5,761,084
`5,764,647
`5,766,133
`5,768,301
`5,779,196
`5,781,015
`5,783,999
`5,784,441
`5,790,363
`5,793,764
`5,796,185
`5,796,965
`5,799,040
`5,799,194
`5,799,196
`5,802,042
`5,802,305
`5,805,597
`5,805,904
`5,808,846
`5,810,606
`5,812,531
`5,814,900
`5,815,665
`5,821,868
`5,828,293
`5,834,942
`5,835,005
`5,836,785
`5,838,683
`5,841,203
`5,841,360
`5,842,955
`5,845,150
`5,845,190
`5,848,149
`5,854,824
`5,854,839
`5,859,584
`5,859,596
`5,884,086
`5,896,415
`5,896,509
`5,909,445
`5,915,002
`5,918,016
`
`7/1997
`7/1997
`7/1997
`7/1997
`8/1997
`8/1997
`9/1997
`9/1997
`9/1997
`10/1997
`10/1997
`10/1997
`10/1997
`10/1997
`10/1997
`10/1997
`11/1997
`11/1997
`11/1997
`11/1997
`11/1997
`12/1997
`12/1997
`1/1998
`2/1998
`2/1998
`3/1998
`3/1998
`4/1998
`4/1998
`4/1998
`5/1998
`5/1998
`6/1998
`6/1998
`6/1998
`6/1998
`7/1998
`7/1998
`7/1998
`7/1998
`8/1998
`8/1998
`8/1998
`8/1998
`8/1998
`8/1998
`8/1998
`9/1998
`9/1998
`9/1998
`9/1998
`9/1998
`9/1998
`9/1998
`9/1998
`9/1998
`10/1998
`10/1998
`11/1998
`11/1998
`11/1998
`11/1998
`11/1998
`11/1998
`12/1998
`12/1998
`12/1998
`12/1998
`12/1998
`12/1998
`1/1999
`1/1999
`3/1999
`4/1999
`4/1999
`6/1999
`6/1999
`6/1999
`
`LoCascio et al.
`Pryor et al.
`Ben-Meir et al.
`Poisner
`Jones et al.
`Bell et al.
`Skinner, Sr.
`Right et al.
`Ito et al.
`McBride
`Barringer
`Broedner et al.
`Holmdahl
`Faupel et al.
`Drakulic
`Ogawa
`Ratner
`Dare et al.
`KurtZ et al.
`Edem et al.
`Merwin et al.
`Rieb et al.
`Price
`Leimkoetter
`Cotichini et al.
`Wadhawan et al.
`Taguchi et al.
`Fackler et al.
`Iwasaki et al.
`Bonola
`Dea et al.
`Soora et al.
`Pemberton
`Edwards
`Riley
`Faisandier
`Dreyer et al.
`Timar
`Duf?n et al.
`Price et al.
`Davis et al.
`Chaudhry
`Bartoldus et al.
`Takata et al.
`Choi et al.
`Lau
`Allen et al.
`Flannery
`Natarajan et al.
`McKaughan et al.
`Edem
`Jung
`Holce et al.
`Ballast et al.
`Cheung et al.
`Esser et al.
`Teper et al.
`Kuhling
`Rickard
`De Angelis
`Furukawa et al.
`Lee
`Corley et al.
`Chambers et al.
`Binder
`Wilkinson
`Henion
`Bushue et al.
`Chen et al.
`Bengal et al.
`Chen et al.
`Counsell et al.
`McRae
`Amoni et al.
`Owens et al.
`Sugimoto
`Schneider
`Shimosako
`Brewer et al.
`
`Page 4
`
`

`

`US 8,942,107 B2
`Page 5
`
`(56)
`
`References Cited
`
`U_S_ PATENT DOCUMENTS
`
`7/1999 Laine
`5,920,253 A
`7/1999 Allgood et al.
`5,920,266 A
`7/1999 Elberbaum
`5,923,363 A
`7/1999 Bontempsetal. .......... .. 370/445
`5,923,663 A
`7/1999 Ricq 6131.
`5,929,624 A
`7/1999 Iwasakiet al‘
`5,929,626 A
`7/1999 Asamaetal‘
`5,929,778 A
`8/1999 Shuey
`5,933,073 A
`8/1999 Allen
`5,933,590 A
`8/1999 Bellows
`5,937,033 A
`8/1999 Bouffardetal‘
`5,939,801 A
`8/1999 Flach et 31‘
`5,944,659 A
`8/1999 He
`5,944,824 A
`8/1999 Pate 6131.
`5,944,831 A
`8/1999 Simpson
`5,946,180 A
`9/1999 ChOietal.
`5,948,077 A
`9/1999 Ness et al‘
`5,949,806 A
`9/1999 Ewing et 31‘
`5949974 A
`9/1999 Ganmukhietal.
`5,953,314 A
`9/1999 Obataetal‘
`5,960,208 A
`5,963,557 A 10/1999 Eng
`5,971,804 A 10/1999 Gallagher et al‘
`5991311 A 11/1999 Long et al‘
`5,991,885 A 11/1999 Chang et 31‘
`5,994,998 A 11/1999 Fisher et al.
`5,995,348 A 11/1999 McCartan 6161.
`5,995,353 A 11/1999 Cunningham 6131.
`6,000,003 A 12/1999 Allen et 31‘
`6,005,760 A 12/1999 Holce etal‘
`6,009,479 A 12/1999 Jeffries
`6,011,680 A
`1/2000 Solleder et 31‘
`6,011,794 A
`1/2000 Mordowitz et 31‘
`6,011,910 A
`1/2000 Chau et al‘
`6,016,519 A
`1/2000 Chidaetal‘
`6,018,452 A
`1/2000 Meyerhoeferetal.
`6,021,493 A
`2/2000 Cromer et al‘
`6,021,496 A
`2/2000 Dutcher et al.
`6,031,368 A
`2/2000 Klippelet a1.
`6,033,101 A
`3/2000 Reddick et 31‘
`6,038,457 A
`3/2000 Barkat
`6,042,390 A
`3/2000 Leung
`6,044,081 A
`3/2000 Bell et al.
`6,047,376 A
`4/2000 Hosoe
`6,049,139 A
`4/2000 Nagauraetal,
`6,049,881 A
`4/2000 Massman 6161.
`6,057,670 A
`5/2000 Sinketal.
`6,064,305 A
`5/2000 Lockyer
`6,069,899 A
`5/2000 Foley
`6,091,722 A
`7/2000 Russell 6131.
`6,092,131 A
`7/2000 Caldwell et al.
`6,092,196 A
`7/2000 Reiche
`6,095,867 A
`8/2000 Brandt etal‘
`6,097,761 A
`8/2000 Buhring 6161.
`6,100,471 A
`8/2000 Fouache
`6,101,459 A
`8/2000 Tavallaeietal.
`6,108,330 A
`8/2000 Bhatia et 31‘
`6,111,936 A
`8/2000 Bremer
`6,115,468 A
`9/2000 De Nicolo
`6,121,778 A
`9/2000 MOOre
`6,125,448 A
`9/2000 Schwan 6131.
`6,130,894 A 10/2000 Ojard 6161.
`6,130,896 A 10/2000 Lueker et a1.
`6,134,666 A 10/2000 De Nicolo
`6,137,839 A 10/2000 Mannering 6131.
`6,140,911 A 10/2000 Fisher et al‘
`6,141,763 A 10/2000 Smith etal,
`6,144,722 A 11/2000 Anderson et 31,
`6,147,601 A 11/2000 Sandelman et a1.
`6,147,603 A 11/2000 Rand
`6,147,963 A 11/2000 Walker et a1.
`6,154,488 A 11/2000 Hunt
`6,157,534 A 12/2000 Gallagher et al.
`6,169,475 B1
`1/2001 Browning
`6,169,883 B1
`1/2001 Vimpariet a1.
`6,171,152 B1
`1/2001 Kunz
`
`6,172,606 B1
`6,175,556 B1
`6,178,176 B1
`6,178,455 B1
`6,178,458 B1
`6,173,514 B1
`6,181,140 B1
`6,186,803 B1
`6,205,137 B1
`6,215,789 B1
`6,218,930 B1
`6,219,216 B1
`61222852 B1
`6,233,613 B1
`6,233,689 B1
`6,236,625 B1
`6,236,653 B1
`6,243,394 B1
`6,243,818 B1
`6,246,748 B1
`6,252,878 B1
`6,253,121 B1
`6,259,745 B1
`6,272,219 B1
`6,272,552 B1
`6,275,498 B1
`6,278,357 B1
`6,278,665 B1
`6,279,060 B1
`6,292,901 B1
`6,295,356 B1
`6,295,569 B1
`6,300,847 B1
`6,301,527 B1
`6,311,173 B1
`6,314,102 B1
`6,317,675 B1
`6,324,268 B1
`6,329,810 B1
`6,332,166 B1
`6,344,794 B1
`6,343,874 B1
`6,349,353 B1
`6,351,648 B1
`6,359,906 B1
`6362909 B1
`6,366,143 B1
`6,366,208 B1
`6,366,618 B1
`6,373,851 B1
`6,377,874 B1
`6,383,076 B1
`6,384,755 B1
`6,385,030 B1
`6,393,050 B1
`6,393,474 B1
`6,393,607 B1
`6,396,391 B1
`6,398,779 B1
`6,415,244 B1
`6,418,332 B1
`6,420,976 B1
`6,449,348 B1
`6,456,625 B1
`6,459,175 B1
`6,473,608 B1
`6,480,510 B1
`6,483,903 B1
`6,496,103 B1
`6,504,825 B1
`6,522,151 B2
`6,526,516 B1
`6,529,127 B2
`6,535,983 B1
`6,546,494 B1
`6,571,181 B1
`6,587,454 B1
`6,640,308 B1
`6,643,566 B1
`
`1/2001 Lockyer
`1/2001 Allen, Jr. et a1.
`1/2001 Voloshin et al.
`1/2001 Schutte et al.
`1/2001 Wang
`1/2001 WOOd
`1/2001 Vokeyetal.
`2/2001 GarSlde
`3/2001 Arlga
`4/2001 Keenan et al.
`4/2001 Katzenberg etal.
`4/2001 Holce et al.
`4/2001 Gandy
`5/2001 Walkeretal.
`5/2001 Allen etal.
`5/2001 Schellet al.
`5/2001 Dalton etal.
`6/2001 Deng
`6/2001 Schwan et a1.
`6/2001 Yano
`6/2001 Locklear, Jr. et al.
`6/2001 Cline et a1.
`7/2001 Chan
`8/2001 De Bruycker etal.
`8/2001 Melvinet a1.
`8/2001 B1sceg11a et al.
`8/2001 Croushore et al.
`8/2001 Schellet al.
`8/2001 LUke 6t 31
`9/2001 Lysetal
`9/2001 DeNlcolo
`9/2001 Sh1muraetal.
`10/2001 Gallagheret al.
`10/2001 Butlandet al.
`10/2001 Levin et al.
`11/2001 Czerwiec et al.
`11/2001 StolZlet al.
`11/2001 Balachandran etal.
`12/2001 Reld
`12/2001 Cranford, Jr. et al.
`2/2002 UlfiCh et 31
`2/2002 (30165481
`2/2002 LeW1s et al.
`2/2002 Karapetkov et al.
`3/2002 Dyke etal.
`3/2002 BedIOSi?Il
`4/2002 Liuet al.
`4/2002 Hopk1ns etal.
`4/2002 M11191
`4/2002 Dadarlo
`4/2002 Ykema
`5/2002 T1edeken
`5/2002 Hayden
`5/2002 B99119
`5/2002 L111
`5/2002 E1chertet a1.
`5/2002 Hyghesetal
`5/2002 B1nder
`6/2002 Bylysse etal
`7/2002 chkens et al.
`7/2002 Mastrototaro et al.
`7/2002 B11888 er al~
`9/2002 Lanib etal.
`9/2002 IIOI
`10/2002 Potega
`10/2002 Lflhf et al
`11/2002 Blnder
`11/2002 My etal~
`12/2002 We1ss etal.
`1/2003 Atkins etal.
`2/2003 Armistead 6t {11.
`2/2003 Ishikawa et al.
`3/2003 Townsend et a1.
`3/2003 McCormack et al.
`4/2003 Jackson et al.
`5/2003 Rakshanietal.
`7/2003 Lamb
`10/2003 Keyghobad et a1.
`11/2003 Lehr et al.
`
`Page 5
`
`

`

`US 8,942,107 B2
`Page 6
`
`(56)
`
`References Cited
`
`OTHER PUBLICATIONS
`
`U.S. PATENT DOCUMENTS
`
`6,658,108
`6,665,306
`6,681,013
`6,701,443
`6,744,831
`6,744,888
`6,753,671
`6,762,675
`6,795,493
`6,889,095
`7,116,779
`7,158,483
`7,275,255
`
`B1
`B1
`B1
`B1
`B2
`B1
`B1
`B1
`B1
`B1
`B1
`B1
`B2
`
`12/2003
`12/2003
`1/2004
`3/2004
`6/2004
`6/2004
`6/2004
`7/2004
`9/2004
`5/2005
`10/2006
`1/2007
`9/2007
`
`Bissell et al.
`Thakur et al.
`Miyamoto
`Bell
`Chan
`El-Kik et al.
`Harvey
`Ca?ero et a1.
`Huang
`Eidson et al.
`Meyerhoefer et al.
`Takabatake et al.
`Suda et al.
`
`FOREIGN PATENT DOCUMENTS
`
`CN
`CN
`DE
`DE
`DE
`EP
`EP
`EP
`EP
`EP
`EP
`EP
`FR
`GB
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`KR
`W0
`W0
`W0
`W0
`W0
`W0
`W0
`W0
`W0
`
`1117614 A
`1150359 A
`3907652 A1
`4203304 A1
`4138065 A1
`0093095 A3
`0357482 A2
`0386659 A2
`0415312 A1
`0639916 A2
`0584447 B1
`0852018 B1
`2682843 A1
`2249919
`60164289
`63018741
`63059144
`1016053
`1160198
`2087762
`02226836
`3143130
`4020192
`4180430
`04358493
`05012576
`5150854
`06012579
`06075652
`06216913
`06261041
`H6244893
`07007517
`08008903
`08096900
`H8204782
`08265727
`H8307476
`08322164
`09153905
`09275387
`9305508
`09325927
`10013576
`1998013576
`10041964
`10066110
`900007034 B1
`WO-9217968 A1
`WO-9302510 A1
`WO-9623377 A1
`WO-9627967 A1
`WO-9629638 A1
`WO-9628940 A3
`WO-9628920 A3
`WO-9709667 A1
`WO-9857248 A2
`WO-9934591 A1
`
`2/1996
`5/1997
`9/1990
`8/1992
`5/1993
`12/1986
`3/1990
`9/1990
`3/1991
`2/1995
`6/1997
`5/2003
`4/1993
`5/1992
`8/1985
`1/1988
`3/1988
`1/1989
`6/1989
`3/1990
`9/1990
`6/1991
`1/1992
`6/1992
`12/1992
`1/1993
`6/1993
`1/1994
`3/1994
`8/1994
`9/1994
`9/1994
`1/1995
`1/1996
`4/1996
`8/1996
`10/1996
`11/1996
`12/1996
`6/1997
`10/1997
`11/1997
`12/1997
`1/1998
`1/1998
`2/1998
`3/1998
`9/1990
`10/1992
`2/1993
`8/1996
`9/1996
`9/1996
`11/1996
`12/1996
`3/1997
`12/1998
`7/1999
`
`“100 Mb/ s data Transmission on UTP and STP Cabling for Demand
`Priority Networks” (By Hewlett Packard, HP Laboratories Bristol,
`HPL-94-88, Oct. 1994).
`“100Years of Bell Telephones” {Book} (Author: Richard Mountjoy,
`A Schiffer Book, 1995).
`“$500 Per Seat ATM?” (Business Communications Review, Jan.
`1995).
`AccessHub Line UnitiModel MMH-220 by PairGain Technolo
`gies, InciRev. 01, (Jul. 30, 1997), 20 pages.
`AdtraniModel Adtran D448 U-BRlTE II ISDN 2B1Q Interface for
`Alcatel D448 Channel Banks Installation/MaintenanceiSection
`61430020L2-5iIssue 1, (Jul. 1997), 7 pages.
`Advanced Micro Devices, Inc., Chipcom Corporation, Digital Equip
`ment Corporation, Motorola Inc., and SynOptics Communications,
`Inc., “Shielded Twisted Pair Proposal for the TP-PMD Working
`Group” (Jun. 1991).
`Advanced Micro Devices, “Implementing FDDI Over CopperiThe
`ANSI X3T9.5 Standardepplication Note”, Pub. #18258, Rev. A
`(Nov. 1993).
`Advertisement for Watchdog Network Monitor, LAN Magazine, vol.
`5, No. 6, (Jun. 1990), 5 pages.
`“Alternate Copper Media for FDDI” by Chipcom Corporation, [33
`pages] (Jun. 1990).
`AMD, Chipcom, DEC, IBM, Motorola, SynOptics, “STP Proposali
`Introduction”, (Oct. 15, 1991).
`AMD, Chipcom, DEC, IBM, Motorola and SynOptics, “Wire Fault
`Detect Function”, ANSI X3T9.2 FDDI TP-PMD Working Group,
`(Oct. 15, 1991).
`AMD, Chipcom, Digital, IBM, Motorola and SynOptics, “Report on
`Action Item to Merge STP-PMD Proposals”, (Aug. 20, 1991).
`An Interoperable Solution for FDDI Signaling Over Shielded
`Twisted Pair, Advanced Micro Devices, Inc., (May 21, 1990), 9
`pages.
`An Interoperable Solution for FDDI Signaling Over Shielded
`Twisted Pair, Advanced Micro Devices, (May 21, 1991), 25 pages.
`Anonymous, “Theft Detection Means for Use with Coaxial Cables,”
`(Undated), 1 page.
`“ANSI/IEEE 802 .4-1990”i“Information processing systemsiLo
`cal area networksiPart 4: Token-passing bus access method and
`physical layer speci?cations” (1990).
`“ANSI/IEEE Std 802.2”i“IEEE Standard for Information technol
`ogyiTelecommunications and information exchange between sys
`temsiLocal and metropolitan area netvzorksiSpeci?c require
`mentsiPart 2: Logical Link Control” (1998 Edition).
`“ANSI/IEEE Std 802.5-1985iISO/DP 8802/5iLocal area Net
`worksiANSI/IEEE Standard ISO Draft ProposaliToken Ring
`Access Method” (1985).
`“ANSI/IEEE Std 802.5-1998EiInformation technologyiTele
`communications and information exchange between systemsiLo
`cal and metropolitan area netvzorksiSpeci?c requirementsiPart 5:
`Token ring access method and Physical Layer speci?cations” (1998).
`“ANSI INCITS 229-1994 (R1999)”i“For Information Systemsi
`Fibre Distributed Data Interface (FDDI)iStation Management
`(SMT)” (1994).
`“ANSI X3.166-1990”i“For Information Systems”i“Fibre Dis
`tributed Data Interface (FDDI)iToken Ring Physical Layer
`Medium Dependent (PMD)” (1990).
`“ANSI X3.166-1990”i“For Information Technology”i“Fibre
`Distributed Data Interface (FDDI)iToken Ring Twisted Pair Physi
`cal Layer Medium Dependent (TP-PMD)” (1990).
`“ANSI X3.263-1995”i“For Information Technology”iFibre Dis
`tributed Data Interface (FDDI)iToken Ring Twisted Pair Physical
`Layer Medium Dependent (TP-PMD) (1995).
`“A proposal for a Low-Cost FDDI UTP/STP PMD Standard” by
`Mario Mazzola, Crescendo Communications [31 pages] (Oct. 15,
`1991).
`“ATM: Ready for Lift-Off” (Information Week, Feb. 6, 1995).
`“ATM takes to twisted-pair” (Electronic Engineering Times, Dec. 19,
`1994).
`
`Page 6
`
`

`

`US 8,942,107 B2
`Page 7
`
`(56)
`
`References Cited
`
`OTHER PUBLICATIONS
`
`“ATM to run over copper wire” (Computer World, Jan. 23, 1995).
`“Attachment Module Guide for the IBM Token-Ring Network,”
`IBM, Apr. 1992.
`Avaya, “MERLIN MAGIC Integrated SystemiInstallation Release
`3.0 and Earlier,” 555-730-140, Issue 1, May 2003, 329 pages.
`“AT&T Merlin Phones,” (Web Document), 3 pages.
`AT&T, “MERLIN Plus Communications SystemiTraining
`Manual,” Dec. 1986, 999-505-144, Issue 1, 80 pages.
`AT&T, “MERLIN Plus Communications SystemiSystem Planner,”
`Sep. 1988, 999-501-141, Issue 1, 18 pages.
`AT&T, “MERLIN Plus Communications SystemiRelease
`14Customization Chart,” Nov. 1988, 999-503-146, Issue 1, 6 pages.
`“AT&T Merlin” (WikipediaiWeb Document), 3 pages.
`AT&T Technologies, “Telecommunications Transmission Engineer
`ing”, vol. 1, Principles (1975).
`Avaya Communication, “Intuity Messaging Solutions Release 5 Inte
`gration with MERLIN LEGEND and MERLIN MAGIX Communi
`cations Systems,” Jan. 2001, 585-310-748, Issue 2, Chapter 4, pp.
`4-1-4-29.
`Bay Networks Public Information, “LattisNet (Pre-10BaseT Versus
`10BaseT”, Technical Response Center, Technical Tip (Date
`Unknown).
`“Bear Sterns New Age Media II” (By Cliff Friedman) {Date
`Unknown}.
`Bradley, et al., “Track Devices on a Mac Network,” The Local Area
`Network Magazine 7.n9, p. 162(1), (Sep. 1992).
`Bradley, et al., “Unix-based Tracking Software,” The Local Area
`Network Magazine 7.n9, p. 162(2), (Sep. 1992).
`“Broadband to Homes” (Interactive Age, Dec. 12, 1994).
`“Cards to Handle Fast ATM on Stande Wire” (Communications
`Week, Nov. 14, 1994).
`Chapter I LattisNet Operation, Ethernet Connectivity Guide, 145
`pages.
`“Cheap transceivers vault Tut into ATM, rural I-way markets”
`(MacWeek, Dec. 12, 1994).
`Chipcom Corporation, “FDDIiAn Introduction to Fiber Distributed
`Data Interface” (Date Unknown).
`Chipcom, “Jan. 1992iFDDI Product DirectioniFDDI Connectiv
`ity” (Jan. 1992).
`Chipcom Corporation, “Online FDDI Media Modules Release
`Notes” (Apr. 14, 1994).
`Cisco for Alli“What is DSL and its Different Flavors?” (Date
`Unknown), 3 pages.
`“Cisco System backs proposed speci?cation for FDDI over shielded
`twisted-pair” by Business Wire (May 22, 1991) and “News & Analy
`sis FDDI Over STP? Sounds Great, But Where Is It?” by Laura Didio
`from LAN Times (Jun. 3, 1991) [1 page].
`Closeup ArticleiThe LAN Inner Circle [15 pages] (Mar. 25, 1985).
`Coilcraft, “10 BASE T Transformerstual Transformer Package”
`(Jun. 1989).
`Colin, et al., “Testing the LAN Testers,” Network World, (Sep. 10,
`1990), pp. 39-40, 44-45, 48, 74.
`Communications Week, “Crescendo Preps PC CDDI Card” (Oct. 26,
`1992).
`Communication Week Article: “FDDI Spec Consortium” [2 pages]
`(May 27, 1991).
`“ComNet focuses on routing, ATM” (PC Week, Jan. 23, 1995).
`“Companies Cooperate to Publish Open Speci?cation for FDDI on
`Shielded Twisted Pair Cable”i“Five Industry Leaders Demonstrate
`Interoperability of Products” (Author Unknown) [2 pages] (May 21,
`1991).
`Computerworld, “Network Peripherals Cuts FDDI Prices” (Dec. 7,
`1992).
`Computerworld, “Vendors BackNext-Generation FDDI; Unshielded
`Twisted-Pair Products for High-Speed Nets Leapfrog Draft Stan
`dard” (May 3, 1993).
`Cook, John, “Line Codes for FDDI Over Copper” BT Laboratories,
`Copper Access Systems Section (Date Unknown).
`
`“Copper Cable with HDSL”iA Technology Brief from PairGain
`Technologies, Inc., (Date Unknown), 5 pages.
`Crescendo Communications, Mazzola, Mario; “A Proposal for a
`Low-Cost FDDI UTP/STP PMD Standard” (Oct. 15, 1991).
`CSN, “Hub Makers Seek FDDI Link” (Oct. 14, 1991).
`“Daisy-Chain Ethernet” (BYTE, Jan. 1995).
`Darrow, Barbara, “Chipcom LAN Concentrator Spans Multiple Pro
`tocols, Cabling Schemes”, Info World, (Jan. 29, 1990).
`“Data CablingiStill in the Melting Pot?” (by the Cabling Partner
`ship) (Jul. 21, 1998).
`Data CommunicationstcGraw-Hill’s Technology Magazine for
`Network Managers: “Multivendor token ring networks coming of
`age” [5 pages] (Nov. 21, 1989).
`“Data Net” (Electronic News, Jan. 23, 1993).
`DEC Concentrator 500 (Technical Description),