A Broadband Optical Access System with Increased Service Capability by Wavelength Allocation Series G: Transmission Systems and Media Digital Systems and Networks Digital Sections and Digital Line Systems - Optical Line Systems for Local and Access Networ
ITU-T Rec.G.983.1 on "Broadband optical access systems based on passive optical networks (PON)" describes systems with transmission rates of 155.52 or 622.08 Mbit/s downstream and 155.52 Mbit/s upstream. G.983.1 Amendment 1 allows enhancement to include 622.08 Mbit/s upstream. ITU-T Rec.G.983.3 which describes "Broadband Passive Optical Network (B-PON) systems with increased service capability by wavelength allocation" could not take account of Amendment 1/G.983.1. This Amendment describes modifications to the requirements for isolation and return loss in G.983.3 made necessary because of the power budget changes needed for 622.08 Mbit/s upstream rate.