[8023-10GEPON] Fwd: [8023-10GEPON] As for the Class B+ of ITU-T
Dear 10G-EPON members,
I would like to clarify one thing.
Yesterday, I sent the following e-mail because it was my homework.
It does not mean that class B+ is my preference.
Sincerely yours,
Tsutomu TATSUTA
>Date: Mon, 20 Nov 2006 13:58:55 +0900
>To: STDS-802-3-10GEPON@listserv.ieee.org
>From: "T.TATSUTA" <tatsuta@ansl.ntt.co.jp>
>Subject: [8023-10GEPON] As for the Class B+ of ITU-T
>
>Dear 10G-EPON members,
>
>This is Tsutomu TATSUTA from NTT.
>As I promised in Dallas meeting, I checked a reason why Class B+ of ITU-T
>was 28dB.
>
>Class B+ loss is derived from Class B loss and WDM losses.
>WDM losses are estimated at 3dB (2 WDM couplers are settled in the both
>side of ODN).
>So,
>28dB (Class B+ loss) = 25dB (Class B loss) + 3dB (WDM coupler loss).
>
>Sincerely yours,
>Tsutomu TATSUTA