CENTRAL OFFICE SIDE REDUNDANCY SCHEME FOR FIBER TO-THE-HOME PASSIVE OPTICAL NETWORKS

摘要

The present invention provides optimized and cost effective solution to provide Central Office side redundancy in a Fiber To The Home-Passive Optical Networks (FTTH-PON). The present invention includes central office side system Optical Line Terminal (OLT) consisting of switching card module (SCM) to interface to other networks and to switch data, a plurality of PON cards receiving the switching data and providing access network through Passive Optical Splitters to plurality of end user devices called Optical Network Unit. The OLT system in present invention includes N working and M standby cards. Present invention provides M:N redundancy for hardware failure and 1:1 redundancy for fiber-cut with the help of (MxN cross-connect and 2x2 cross connect) or ( M+N)x2N cross-connect. The plurality of PON cards are connected to optical cross-connect, thereby realizing M:N redundancy towards hardware failure and 1:1 redundancy towards fiber cut.