Migration of TDM network into NGN for the Fixed Wire-line access Network

This paper outlines the telecommunication network evolution from copper based technologies to fiber based next generation network (NGN). In addition, some practical issues are addressed, for instance migration from Time Division Multiplexing (TDM) network to Internet Protocol (IP) network, transformation from circuit switch network to packet switch network, and network design with under the NGN architecture. A case study of optical access network design and architecture at Nepal Telecom (NT) is done to perform the migration of TDM into NGN for the Fixed Wire-line Network.