In voice telecommunications, least-cost routing (LCR) is the process of selecting the path of outbound communications traffic based on cost. Within a telecoms carrier, an LCR team might periodically (monthly, weekly or even daily) choose between routes from several or even hundreds of carriers for destinations across the world. This function might also be automated by a device or software program known as a "Least Cost Router."
Read more about Least-cost Routing: Telecoms Carriers As Suppliers and Customers, Buying->costing->routing->pricing->margin Management Cycle, Impact of Mobile-number Portability in VOIP and LCR Environments, Number Plan Management and Analysis, Cherry-picking, Route and Call Quality, LCR Software, Related Ideas