Onecall Solutions Limited, established in 2007, is a Software and System Integrator of Unified Communications Solutions -- Contact Center Solutions, Unified Messaging, IP PBX, and Enterprise solutions, for both hardware and software, in Bangladesh. We also provide Digium, Sangoma, Xorcom, Addpac, Atcom, Audiocodes, Plantronics, and Accutone for the highest quality hardware for IP Telephony, headsets, and VOIP Products. OSL has developed its own Contact Center and Enterprise Solution, OneXchange, which has been designed holistically to integrate all-in-one capabilities catering to Customer Interaction Management for Contact Centers and Enterprises.