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Re: [802.3_B400G_OPTX] New 8:30 am ET start time: Tuesday P802.3dj Optics/Logic track meeting

Yesterday, we discussed ITU-T SG15 to IEEE 802.3: LS on revision of Recommendation G.652.

In addition to a possible liaison with a direct response, we may consider suggesting that in the future ITU-T look at tightening CD-related specifications. When we get to 400G/lane, CD tolerance goes down by a factor of four. An example of such a spec is derived from presented data (Chromatic Dispersion Statistics of Different Data Sets, 802.3 SMF Channel Proposal Using Existing ITU-T Codes).

Example future G.652 spec:

ZDW_mean_min = 1312nm
ZDW_mean_max = 1315nm
ZDW_sigma = 2nm
ZDW_min = 1306nm
ZDW_max = 1321nm

Even this doesn't get us home and PMD reach may have to be reduced. 

We may also consider suggesting that despite the challenge, we need PMD distributions. Just because we can't get the data, doesn't mean that the effect turns itself off and graciously waits for us.

We could refine our suggestions in Ad Hoc discussions.

Chris

From: Mark Nowell (mnowell) <00000b59be7040a9-dmarc-request@xxxxxxxxxxxxxxxxx>
Sent: Monday, July 15, 2024 12:43 PM
To: STDS-802-3-B400G-OPTX@xxxxxxxxxxxxxxxxx <STDS-802-3-B400G-OPTX@xxxxxxxxxxxxxxxxx>
Subject: Re: [802.3_B400G_OPTX] New 8:30 am ET start time: Tuesday P802.3dj Optics/Logic track meeting
 

Further to my previous email on the earlier start time for logic/optics track:

 

We will be following the same topic order of presentations that has been posted (start with logic, then move to coherent, then move to Chromatic dispersion).   Presenters, please plan accordingly. 

 

Thanks,
Mark

 

From: Mark Nowell (mnowell) <00000b59be7040a9-dmarc-request@xxxxxxxxxxxxxxxxx>
Date: Monday, July 15, 2024 at 1:19 PM
To: STDS-802-3-B400G-OPTX@xxxxxxxxxxxxxxxxx <STDS-802-3-B400G-OPTX@xxxxxxxxxxxxxxxxx>
Subject: [802.3_B400G_OPTX] New 8:30 am ET start time: Tuesday P802.3dj Optics/Logic track meeting

We will be starting the P802.3dj Optics and Logic track meetings @ 8:30am ET on Tuesday instead of the previously posted time (10:30 am ET).  The schedule was already tight and we now have some incoming liaison letters to address.  Our understanding is that the conflict with P802.3dk will not exist on Tuesday.

 

Regards,
Mark

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