The ODN, an integral part of the PON system, resides as the physical path for optical transmission between the OLT and the ONT. This unique architecture enables PONs to offer several key benefits, including Reduced operating and management costs. In this guide, we'll break down. In this chapter, let us understand what Split Ratios, Maximum Reach and Traffic Management are in the Optical Distribution Network (ODN). The maximum permissible optical power attenuation between OLT optical ports to ONT input is 28dB, which is by utilizing the so-called Class B optical network. Optical Distribution Network (ODN) is an indispensable path for transmitting Passive Optical Network (PON) data and directly affects the performance, reliability, and scalability of a PON system. It directly. The handbook describes various power distribution system constructions and elements there-of, technical considerations, distribution automation infrastructure and functionality, communication aspects, special automation applications and life cycle aspects. Operators consider ODN design as one of the most important factors affecting: Network coverage Optical loss performance Deployment cost (CAPEX) Long-term.