Re: [8023-10GEPON] Downstream wavelength review
Dear Suzuki-san,
I believe I may answer this question since Frank is probably still at night time (Frank, please confirm if I what I am saying is OK) ...
The main reason why Frank proposes to have PR10/PR20 PMDs use the 1580 - 1600 nm window in the downstream is the compatibility with the CDWM wavelength grid and the availability of uncooled transmitters centered around 1590 nm with the power putput sufficient to cope with these particular power budgets. You are right that it does little harm to expand the band to 1574 - 1600 though the big question is whether it will be used in practice. I do not see a reason to block part of the band which will not be used by the PMDs anyway.
Hope that answers Your question
Marek Hajduczenia (141238)
NOKIA SIEMENS Networks S.A., Portugal - R
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* Marek.Hajduczenia@siemens.com
http://www.marekhajduczenia.info/index.php
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"C makes it easy to shoot yourself in the foot; C++ makes it harder, but when you do, it blows away your whole leg." - Bjarne Stroustrup
-----Original Message-----
From: Ken-Ichi Suzuki [mailto:kenyichi@ansl.ntt.co.jp]
Sent: quinta-feira, 30 de Agosto de 2007 8:00
To: STDS-802-3-10GEPON@listserv.ieee.org
Subject: Re: [8023-10GEPON] Downstream wavelength review
Dear Frank
Thank you for your proposal.
Basically, I agree to your proposal.
But I have a comment on Option D.
I believe the full wavelength range of 1574 to 1600 nm can be used
for PX10 and PX20 in Option D.
If someone wants to use the range of 1574 to 1580 for PX10 and PX20
as well as the range of 1580 to 1600 nm, I think we should not limit
the wavelength range of Option D.
So I would like to confirm whether we should limit the wavelength
range because I believe that the specifications should be accepted
by as many people as possible (although I do not have a strong
opinion to PX10 and PX20).
Best regards,
Ken-Ichi
At 2007/08/29 0:07 Frank Effenberger wrote:
> Dear All,
>
>
>
> I have put together some slides that review the downstream wavelength issue,
> and put forward a solution that I think may have some common support.
>
>
>
> Please give me your comments, and if you would like to support it, let me
> know that, also.
>
>
>
> Sincerely,
>
> Dr. Frank J. Effenberger 弗兰克 埃芬博格
>
> Huawei Technologies USA
>
> 1700 Alma Drive, Plano TX 75075
>
> Office (732) 625 3002
>
> Cell (908) 670 3889
>
>
>
>
--
Ken-Ichi Suzuki
NTT Access Network Service Systems Labs.
E-mail:kenyichi@ansl.ntt.co.jp
Tel:+81-43-211-3189/Fax:+81-43-211-8250