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[8023-POEP] IEEE 802.3at Vport ad hoc Meetings Thursday Jan 4 & 11, 9 AM



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BEGIN:VEVENT
DTSTAMP:20061212T174700Z
DTSTART;TZID="GMT -0800 (Standard) / GMT -0700 (Daylight)":20070104T090000
SUMMARY:IEEE 802.3at Vport ad hoc Meetings Thursday Jan 4 & 11\, 9 AM
UID:040000008200E00074C5B7101A82E00800000000004BED72D21DC701000000000000000
 0100000003241C610355F554E83EAF4749994F333
ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN="'STDS-802
 -3-POEP@xxxxxxxxxxxxxxxxx'":MAILTO:'STDS-802-3-POEP@xxxxxxxxxxxxxxxxx'
ORGANIZER;CN="Fred Schindler (frs)":MAILTO:frs@xxxxxxxxx
LOCATION:Call-in  details in this email
DTEND;TZID="GMT -0800 (Standard) / GMT -0700 (Daylight)":20070104T100000
RRULE:FREQ=WEEKLY;UNTIL=20070111T170000Z;INTERVAL=1;BYDAY=TH;WKST=MO
DESCRIPTION:Hello\,\NThe Vport ad hoc has the following meeting schedule to
  discuss the dynamic port voltage requirements. This meeting will be used 
 to review data and constraints\, and develop new constrains for the propos
 ed IEEE 802.3at standard.\NThis effort would benefit from additional data 
 on PSE transient response and PD di/dt demands (see below).\NThanks\,\NFre
 d Schindler\NTechnical Leader\NCISCO Systems\N170 West Tasman Drive\NM/S S
 J-19-3\NSan Jose\, CA 95134-1706\NTel. (408) 525-9859\N\N\N\N\NHello\,\NTh
 e IEEE 802.3at Vport ad hoc needs your help collecting data that will help
  establish new transient constrains on the MDI. Please forward this email 
 to system designers within your companies that will help with this effort.
  If more details are required\, they can contact me directly. We would app
 reciate getting this data before the end of December.\NThanks\,\NFred Schi
 ndler\NTechnical Leader\NCISCO Systems\N170 West Tasman Drive\NM/S SJ-19-3
 \NSan Jose\, CA 95134-1706\NTel. (408) 525-9859\N------------------------ 
 Details ---------------------\NIEEE 802.3at Vport ad hoc presentations\NJa
 nuary 2006\NVport static and transient response <http://grouper.ieee.org/g
 roups/802/3/at/public/jan06/schindler_1_0106.pdf> \Nhttp://grouper.ieee.or
 g/groups/802/3/at/public/jan06/schindler_1_0106.pdf\NMay 2006\NVport stati
 c and transient response <http://grouper.ieee.org/groups/802/3/at/public/m
 ay06/schindler_1_0506.pdf> \Nhttp://grouper.ieee.org/groups/802/3/at/publi
 c/may06/schindler_1_0506.pdf\NConclusion of Vport static discussion <http:
 //grouper.ieee.org/groups/802/3/at/public/may06/schindler_3_0506.pdf> \Nht
 tp://grouper.ieee.org/groups/802/3/at/public/may06/schindler_3_0506.pdf\NV
 port Static & Dynamic Vport Estimator spreadsheet V9 (XLS format) <http://
 grouper.ieee.org/groups/802/3/at/public/may06/schindler_2_0506.xls> \NJuly
  2006\NVport ad hoc dynamic discussion <http://grouper.ieee.org/groups/802
 /3/at/public/jul06/schindler_1_0706.pdf> \Nhttp://grouper.ieee.org/groups/
 802/3/at/public/jul06/schindler_1_0706.pdf\NSeptember 2006\NVport ad hoc d
 iscussion <http://grouper.ieee.org/groups/802/3/at/public/sep06/schindler_
 1_0906.pdf> \Nhttp://grouper.ieee.org/groups/802/3/at/public/sep06/schindl
 er_1_0906.pdf\N\NVport Static & Dynamic Vport Estimator spreadsheet V10 (X
 LS format) <http://grouper.ieee.org/groups/802/3/at/public/sep06/schindler
 _2_0906.xls> \NNovember 2006\NVport ad hoc discussion <http://grouper.ieee
 .org/groups/802/3/at/public/nov06/schindler_1_1106.pdf> \Nhttp://grouper.i
 eee.org/groups/802/3/at/public/nov06/schindler_1_1106.pdf\NSummary\N- The 
 static Vport voltage is within a 50 to 57 VDC range.\N- Spreadsheet v10 is
  the most recent published version (September). See the “PD PSE data” 
 for example data submissions.\N- We are investigating keeping the PD volta
 ge specification as is when accommodating transient conditions.\N- The cha
 nnel model used does not represent a real world system but the task force 
 believes errors are negligible.\N- There are no di/dt PD constraints in th
 e IEEE 802.3 specification.\NGoals\N- Place a minimum number of constraint
 s on the system in order to ensure system interoperability.\N- We expect t
 o produce a PD di/dt constraint.\N- We expect to produce a PSE voltage dro
 op constraint (below the static port voltage for a specific duration).\NPl
 ease send scope images captured and your system setup details.\NPD data re
 quired\NPlease use a short cable to connect the PD to a low output impedan
 ce supply for your tests. Operate the PD in modes you expect higher di/dt 
 rates. We also need data for PD DC-DCs. Load the output and measure the Et
 hernet line side to capture the worst-case data. We expect DC-DC data to p
 rovide the most reliable worst-case data.\N- A model number (so that other
 s can repeat the experiment). Data can be kept anonymous. Please state you
 r preference.\N- di/dt values for a specific duration.\N- Does the PD ever
  cross Icut or Ilim? Please provide details if this does occur.\N- How doe
 s the PD respond to MDI voltage changes (up/down within spec.)? ex/ some P
 Ds turnoff when the supply droops to fast. Some draw more di/dt when the v
 oltage is increased.\NPSE data required\NTransients are expected for load 
 changes (assume all PD transition to a new load level)\, or supply replace
 ment events (backup of a failing supply).\N- A model number (so that other
 s can repeat the experiment). Data can be kept anonymous. Please state you
 r preference.\N- dv/dt and duration.\N- Details on the condition causing t
 he transient. Ex/ load change\N\N_________________________________________
 _____________________________________\NFrederick Schindler has invited you
  to a Cisco MeetingPlace Reservationless Conference\N\NMeeting ID:        
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 elow to attend a Voice Only Conference as a Guest then follow the system p
 rompts.\N\NTO ATTEND A RESERVATIONLESS VOICE ONLY CONFERENCE\N\NAS THE HOS
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 N_________________________________________________________________________
 ______\N\N
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