If we want an IEEE metro DWDM 100GE alternative,
we will need a separate reach objective. The requirements of the HSSG 40km LAN reach
objective can be met with alternatives that do not work for metro DWDM. Examples
of alternatives that will not work are 1310nm solutions, or 1550nm CWDM solutions.
So to work towards a metro DWDM
specification, we need a metro DWDM objective.
Chris
From: Marcus Duelk [mailto:duelk@alcatel-lucent.com]
Sent: Wednesday, April 04, 2007
3:11 PM
To: Chris
Cole
Cc: STDS-802-3-HSSG@listserv.ieee.org
Subject: Re: [HSSG]
<HSSG-FOAH> Meeting
What do you have in mind ? A motion like
"I do not support an objective for a PMD that is compatible to WDM
networking?"
or something like that ? The 10x10G solution would be also WDM, of course :-) .
I mean, do you expect that in the metro space you will have fibers that *only*
carry your 100GbE signal ??? I think this is not the case, even today people use
Ethernet over WDM in that space ...
Marcus
Chris Cole wrote:
Sounds
like a motion for an additional HSSG objective, at the April meeting. J
Chris
Hi Chris,
the straw poll at the Dallas
meeting in Nov 2006 was
"I do not support an objective for a PMD for long-haul or ultra long haul
applications."
Does this automatically exclude the use of multiple wavelength channels
on the same fiber ???
I agree that the IEEE should not specify long-haul WDM transport. However,
in the Metro space (and this is where we see one of the market potentials for
100 GbE) a lot of fiber links are in fact WDM, i.e. they carry multiple
wavelength
channels already. It might be of interest for certain applications to carry a
100 GbE
"LAN" channel across that metro network. For this application, I
think, that the serial
PHY still has some justification. Again, this would be 40km and 1550nm.
Marcus
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:duelk@alcatel-lucent.com]
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 of
the
qualifiers 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 - 1310nm
and
100G - 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 expect
to
see during upcoming HSSG meetings. At this point we are not making any
selection between the alternatives.
Thank you
Chris
--
___________________________
Marcus Duelk
Bell Labs / Alcatel-Lucent
Crawford Hill HOH R-237
791 Holmdel-Keyport Road
Holmdel, NJ 07733, USA
fon +1 (732) 888-7086
fax +1 (732) 888-7074
--
___________________________
Marcus Duelk
Bell Labs / Alcatel-Lucent
Crawford Hill HOH R-237
791 Holmdel-Keyport Road
Holmdel, NJ 07733, USA
fon +1 (732) 888-7086
fax +1 (732) 888-7074