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Marco, While I agree that many links for DR4 could be just 4 connectors, I think that the PHY has a better Broad Market Potential if it can be deployed in a variety of links including 4MPO + 4LC. I ran Jonathan’s spreadsheet for both cases (attached) and (as per comments in the Atlanta meeting) the additional -55 dB reflections don’t make much difference to the 1E-6 penalty. Consequently, I think that we should accommodate the 4 x -35 and 4 x -55 dB link. Regards, Pete Anslow | Senior Standards Advisor From: Marco Mazzini (mmazzini) [mailto:mmazzini@xxxxxxxxx] Hi Pete, from meeting minutes : “A chart showing this result was shown and this was added to an updated version (anslow_01a_0216_smf) of the presentation posted after the close of the meeting. As there are only four high reflection connectors in the double link scenario in kolesar_3bs_01_0514, Pete said he would re-run the spreadsheet with four -35 dB connectors and four -55 dB connectors.” For parallel XCVR like DR4 (http://www.ieee802.org/3/bs/public/14_05/kolesar_3bs_01_0514.pdf, slide 6 and 7), the double link has just 4 MPO, while 4MPO + 4LC is applicable to 2-fiber XCVR (duplex). So if this is still valid, the spreadsheet should be run with four connectors only for DR4 and eight connectors for FR8/LR8. Regards Marco From: Anslow, Peter [mailto:panslow@xxxxxxxxx] Hi, The draft minutes from yesterday’s SMF Ad Hoc call are on the P802.3bs SMF Ad Hoc web page, together with a revised version of the presentation. As discussed on the call, the next SMF Ad Hoc call is scheduled for Tuesday 16 February from 9:00 to 11:00 PST (meeting details attached). If you are interested in presenting, please request a timeslot by Noon PST on Monday 15 February. Peter Anslow from Ciena has invited you to join a meeting on the Web, using WebEx. Please join the meeting 5-10 minutes early so we may begin on time. +44-203-4333547 (United Kingdom) 4438636577 (United States) 2064450056 (Canada) 4006920013 (China) Regards, Pete Anslow | Senior Standards Advisor |
Attachment:
DR4_MPI.pptx
Description: DR4_MPI.pptx