Pete,
I considered your proposed alternative as
I wrote my proposed change. The reasons why I decided to propose
appending the IEC reference rather than replacing the TIA reference are that the
TIA reference for OM3 is cited in note e, and both IEC and TIA references are
cited in note d. So following those precedents I thought it better
to be complete.
Regards,
Paul
From: Anslow, Peter
[mailto:panslow@xxxxxxxxx]
Sent: Wednesday, April 27, 2011
5:45 AM
To: Kolesar, Paul;
STDS-802-3-MAINT@xxxxxxxxxxxxxxxxx
Subject: RE: Revising Clause 52
10GBASE-S for OM4
Paul,
I agree with your proposed changes
except that on slide 13, note f, I think it would be better to replace the TIA
specification with a reference to IEC
60793-2-10:2011 since there has been a trend to prefer international IEC
references and there doesn’t seem to be a good reason to introduce
possible ambiguity by specifying multiple sources for this information.
Regards,
Pete
Anslow | Senior Standards Advisor
Direct +44 2070 125535 |
From: Kolesar, Paul
[mailto:PKOLESAR@xxxxxxxxxxxxx]
Sent: 26 April 2011 21:13
To:
STDS-802-3-MAINT@xxxxxxxxxxxxxxxxx
Subject: Re: [802.3_MAINT]
Revising Clause 52 10GBASE-S for OM4
Matt,
Thanks for circulating this slide deck.
I remain a supporter, and thanks for listing my name. Please change
my affiliation from Systimax to CommScope. Although they are often used
interchangeably because SYSTIMAX Solutions was the former name of the division,
SYSTIMAX is a brand of cabling solutions offered by CommScope.
A few more suggestions.
Slide 3, bullet 3: for improved clarity
and simplicity I suggest changing “new multimode fiber” to
“OM4”.
Global (affecting slide 3 bullet 1, slide
13 note f, and slide 14), please be aware that the IEC specification containing
OM4 has now been published. It is the same as the TIA spec. So the
references to TIA-492AAAD, while accurate, now have an international
alternative, IEC 60793-2-10 edition 4: 2011. Below I’ve pasted the
cover page viewable from the IEC web store. The specific effect on the
three slides mentioned is as follows:
Slide 3, bullet 1: suggest changing to:
TIA and IEC have standardized a new class
of multimode fiber, OM4, in TIA-492AAAD and IEC 60793-2-10 ed.4
Slide 13, note f: suggest appending at
end:
“and IEC 60793-2-10 ed.4”
Slide 14: Given that the edition of
the cited IEC reference is not specified, the latest edition (ed. 4) is
implied. In that case the proposed addition of the reference to
TIA-492AAAD is not needed and the slide can be deleted.
Lastly, on slide 13 the dispersion slope
entries need to be corrected as follows (see yellow
highlighted text):
From:
0.105 for 1295 <= lambda0 <= 1310
And 0.000375x(1590-lambda0) for 1295 <= lambda0 <= 1340f
To:
0.105 for 1295 <= lambda0 <= 1310 and 0.000375(1590-lambda0)
for 1310 <= lambda0 <= 1340f
If these changes are not clear, please
call or email your concerns.
Regards,
Paul
From: Matt Traverso
(mattrave) [mailto:mattrave@xxxxxxxxx]
Sent: Tuesday, April 26, 2011
12:46 PM
To:
STDS-802-3-MAINT@xxxxxxxxxxxxxxxxx
Cc: John Petrilla; Jonathan King;
Houfar Azgomi (hazgomi); Hugh Barrass (hbarrass); Carlo Tosetti (ctosetti);
Marco Mazzini (mmazzini); Kolesar, Paul; Chris Cole; Petar Pepeljugoski; Ali
Ghiasi; Mike Dudek; Wael Diab
Subject: Revising Clause 52
10GBASE-S for OM4
IEEE
Colleagues,
During
the working group ballot phase for the maintenance project (exiting July
plenary, http://www.ieee802.org/3/minutes/mar11/0311_maint_close_report.pdf#Page=8)
, we intend to submit a revision comment. The attached presentation
provides the background, and details the proposed changes. In the
interest of building consensus prior to the working group ballot, we wish to
solicit additional expert opinions & supporters. Please advise if
there are any questions.
Also,
per an offline discussion with Wael Diab, it seems likely that an opportunity
to present this material at the July plenary should be available.
Thanks
for your attention,
--matt
traverso
w =
408.853.3211
e =
mattrave@xxxxxxxxx