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Dear Colleagues, Attached please find the intermediate report on wavelength plan proposal, which is based on local discussion in Japan. In addition, I received study results from Dr. Joao Miguel Santos of Siemens and discussed the filter configuration issues. I appreciate his contribution. I would like to elaborate the wavelength plan from the proposal in the slides, and it would be appreciated if you could give me any comments and technical proposals. I wish to apologize in advance for the inconvenience that I will be out of my office from May 2 to 8. Through the study, I recognize the difficulty of deciding the downstream wavelength. The situation of broadband services and its access technologies varies widely depending on countries and operators. Some operators may not care the coexistence among 1G-, 10G-EPON, and RF-video. As a solution to resolve the problem, is it possible to specify two wavelenth band for downstream? For example, Option-1: 1480-1500 for greenfield deployment, Option-2: 1574-1580 for the coexistence among 1G-, 10G-EPON and RF-video. I hope that the concept of creating options is acceptable. Best regards, Keiji Tanaka
Intermediate report(070501).ppt