Re: [8023-10GEPON] FW: Downstream wavelength
Hi Victor: I appreciate your comments,
as they describe the existing conditions in the end solution space.
To that end I support your comments,
and position which is also advocated by Jim Farmer.
My rational is that optical sources
do not need to be so expensive and tightly temperature controlled when
you can use the 1580-1600nm band,
and when you remove the tight wavelength
requirement, optical , sources get cheaper, and thus increase the chances
of wide
acceptance as was the case of 1GEPON,
which uses low-cost optics.
Allowing a wider wavelength range also
consumes less power, and can be viewed as being more "green";
something which was not
a direct component to the initial PAR,
but should be a factor that all engineers take in to account when developing
a new standard.
Best Regards
Maurice Reintjes
MindspeedTM
Hillsboro, Oregon,USA
Office Phone (503)-403-5370
Mobile (503)-701-0797
| Victor Blake <victorblake@xxxxxxx>
11/04/2008 06:21 PM
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Please respond to
Victor Blake <victorblake@xxxxxxx> |
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| Re: [8023-10GEPON] FW: Downstream wavelength |
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Jim,
As an early supporter of
10GigEPON (starting at the CFI) I am writing to the task force to express
my support for your proposal. I believe that the 1580-1600nm wavelength
would be more appropriate for use in the North American and in particular
US MSO market. This market is composed of operators have existing wavelengths
in use of their plant. Some already have substantial EPON deployments.
As you have pointed out,
1577 (1574-1580nm) could be substantial problem for MSOs. Having the second
wavelength available for this market need would help to avoid a conflict
between 10GigEPON and broadcast video – to which 10GigEPON would surely
loose out. If the task force were to elect to keep 1590nm out of the plan,
they would be spelling out certain disaster for 10GigEPON as we know specifically
of the efforts to use 1590nm for current proposals for a next generation
GPON solution. The result of keeping 1590nm out of 10GigEPON would be to
force the MSO industry to GPON. I’ll just assume that is not the goal
of the 10GigEPON Task Force, but it nevertheless would be the most likely
outcome.
In fact it is no surprise
to find that the GPON vendors are the ones most supportive of this proposed
change.
I’ve communicated with a
number of major US MSOs about this issue. The three I have directly received
responses from all support 1590nm and wish to continue to see it as their
first choice. Although these organizations are not directly represented
in the IEEE today, they have from time to time participated in the past,
and are certainly the largest EPON and 10GigEPON market in North America
currently. For this reason, I urge the task force members to reach out
to the MSO community and solicit their opinions if you do not already know
where they stand.
Victor Blake
Independent Consultant
From: Jim Farmer [mailto:Jim.Farmer@xxxxxxxxxxxxx]
Sent: sábado, 1 de Novembro de 2008 15:59
To: STDS-802-3-10GEPON@xxxxxxxxxxxxxxxxx
Subject: [8023-10GEPON] FW: Downstream wavelength
We request to make the attached presentation
during the 10GEPON meeting in Dallas. We remain concerned over the
decision to drop the 1590 nm downstream band from the plan, for reasons
shown in the attached. Note that there are notes that go with most
of the slides. You can see them by going to View|Notes Page
Thanks,
Alan Brown
Jim Farmer
Jim Farmer, K4BSE
Chief Network Architect,
Enablence Technology
FTTx Networks Division.
1075 Windward Ridge Parkway
Alpharetta, GA 30005 USA
678-339-1045
678-640-0860 (cell)
jim.farmer@xxxxxxxxxxxxx
www.enablence.com
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