Limit extension in currentdata transmission systems

In this paper, we concentrate some limit development issues in contemporary long separation telecommunication networks. The initial two issues address limit development in national hybrid long distance telecommunication networks that use both the customary TDM innovation and later VoIP innovation to transport voice calls.We propose a Decentralized Routing Scheme that can be utilized to outline guess calculations for some varieties of half breed organize limit extension. For the Survivable Capacity Expansion Problem in hybrid networks, we propose a conservative number program display. At last, we consider the scope organization issue when pinnacle requests happening at various times can share network capacity.