Fred,
I attended.
If you were to take a random data stream of packets, apply 4B5B, apply the scrambler, apply MLT-3, and then calculate the running digital sum (you can calculate the run length too if you
like), you will find that the absolute value of the RDS increases to various values for various periods of time.
My expectation is that the probability of going to an RDS of 2^(1500*8) is zero because the 4B5B coding would prevent that, but you will find that |RDS| values >> 1 are likely. What I
cannot even guess at, is how long the RDS will stay >>1, before returning to zero and subsequently balancing itself out with an RDS << -1.
If I had the time, I would seriously consider performing this analysis on the "Killer Packet" and the "Nasty Packets" because I believe it would be enlightening, and it would also give
us a reasonable bound on the maximum RDS we are likely to encounter. In addition, it would provide insight into the time variant nature of RDS when this particular coding mix is applied.
I hope this provides some direction on how to proceed.
Dan
---
Principal Engineer, LAN PHY Technology
ProCurve Networking by HP
916-785-4187 (Roseville Office)
530-906-3683 (Cell)
_____________________________________________
From: Fred Schindler (frs)
Sent: Tuesday, July 01, 2008 3:59 PM
To: Fred Schindler (frs); STDS-802-3-POEP@xxxxxxxxxxxxxxxxx
Cc: McCormack, Michael; Joseph Maggiolino; Dove, Daniel; Feldman, Daniel; Hugh Barrass (hbarrass); Kirk Hayden; George Zimmerman; Dinh, Thuyen; Sean Lundy;
Wael Diab; Tom Gandy
Subject: Updated: IEEE 802.3at, "Transformer and Channel" ad hoc conference call Tuesday and Wednesday July 8 & 9, 8 AM PST
When: Tuesday, July 08, 2008 8:00 AM-9:00 AM (GMT-08:00) Pacific Time (US & Canada).
Where: Call-in
--- Resend in order to correct typos for the dates. Thanks for the heads up Wael. ---
Hello,
The IEEE 802.3at, "Transformer and Channel" ad hoc will have conference calls on: Tuesday July 8, and Wednesday July 9 at 8 AM PST.
______________________________________________________________________________
Frederick Schindler has invited you to a Cisco Unified MeetingPlace Conference
Date/Time: JUL 8, 2008 at 8:00AM America/Los_Angeles
Length: 60
Frequency: 2
Meeting ID: 131407813
Meeting Password:
San Jose, CA:
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TO ATTEND A WEB AND VOICE CONFERENCE:
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Join the Web & Voice Conference*
1. Go to http://meetingplaceinternal.cisco.com/join.asp?131407813
2. Enter your CEC User ID & Password then click
OK
- Accept any security warnings you receive and wait for the Meeting Room to initialize
3. Click on CONNECT from the Meeting Room to join the Voice Conference portion of the
meeting
EXTERNAL ATTENDEES - Outside the Cisco Intranet**
Join the Web & Voice Conference*
1. Go to http://meetingplace.cisco.com/join.asp?131407813
2. Fill in the My Name is field then click
Attend Meeting
- If you have a CEC User ID, click on the Cisco icon
- Accept any security warnings you receive and wait for the Meeting Room to initialize
3. Click on CONNECT from the Meeting Room to join the Voice Conference portion of the
meeting
- Note: Guest
users will see a link to the Global Access Numbers.
**Not all meetings are scheduled to allow external attendees into the Web Conference portion of the meeting, if the URL does
not work, please follow the Voice only Conference instructions below to attend.
TO ATTEND A VOICE ONLY CONFERENCE
1. Dial into Cisco Unified MeetingPlace (view the Access Numbers and link above)
2. Press 1 to attend the meeting
3. Follow the prompts to enter the Meeting ID 131407813 and join the meeting
SUPPORT
Information about this Conference: Contact Frederick Schindler, 14085259859
Cisco IT Support Center: Attend the Voice Conference and then press #0 on your phone keypad
_______________________________________________________________________________