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Re: [802.3_MAINT] 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
43-51 Worship Street | London, EC2A 2DX, UK
Direct +44 2070 125535
|

 


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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