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Couple of items you have shaded gray (maybe) and white (preferred) the logic for them is not clear to me:
- Why do you have 40 Km 1310 nm with 10x10 DML and ML white and you have 1550 nm 40Km gray?
- I also don't understand your reasoning for not selecting 4x25G over 10Km of 1310 nm, this will be the
natural implementation when 4x25 become available as you have for 40Km!
I expect early implementation of 100G will be based on 10x10. But when the 4x25 becomes available then
both 10Km and 40Km could go 4x25G instead of using a more complex mux/de-mux.
Chris Cole wrote:
Hi Marcus, The 100GE Technical Feasibility Alternatives table only covers the two proposed HSSG LAN reach objectives; 10km and 40km. There is currently no WDM network objective in the HSSG. (In fact, a straw poll at the Dallas meeting to not have a HSSG long haul PMD reach was supported.) So to keep the coveted green shading we would like to encourage active investigation efforts towards the use of serial techniques for the LAN reach objectives. In any case, I look forward to seeing your serial PHY contributions at the next meeting. Chris -----Original Message----- From: Marcus Duelk [mailto:firstname.lastname@example.org] Sent: Wednesday, April 04, 2007 12:06 PM To: Chris Cole Cc: STDS-802-3-HSSG@listserv.ieee.org Subject: Re: [HSSG] <HSSG-FOAH> Meeting Hi Chris, thanks for the update. I am not speaking for a component vendor so I don't know whether my feedback here can be considered as a solution being "under active investigation". However, from a system vendor's perspective I think that the serial solution (the last two rows of your table) only makes sense for a WDM network which would be at 1550nm and at reaches of 40km and beyond. These fields are currently white but they are, at least from our perspective, under active investigation ... I will make further contributions on the serial PHY at the next meeting(s). Marcus Chris Cole wrote:During today's Fiber Optic Ad Hoc call we discussed updating the SMF alternatives table. We simplified the table entries to three key qualifiers that are required to enable technical feasibility. The updated table is enclosed. Any comments on the proper assignment ofthequalifiers will be appreciated. We would also like to get input on the alternatives that are currently under active investigation (green shading in the table) by HSSG participants. During the FOAC call, the 20G/25G - 1310nm alternatives, and 10G - 1550nm alternatives were confirmed as under active investigation. We would like to find out if the 20G/25G - 1550nm, the 50G - 1310nmand100G - 1310nm alternatives (shaded green) continue to be under active investigation. We would also like to find out if any of the white areas are under active investigation. Please send an email indicating if you are investigating any of the areas not confirmed during today's FOAC call. The purpose is to accurately reflect which investigations are taking place so that we can get an idea of what presentations we can expecttosee during upcoming HSSG meetings. At this point we are not making any selection between the alternatives. Thank you Chris
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