The HP MSR Survivable Branch Communication Module (SBM) powered by Microsoft Lync 2013 enables real time communications, even when the WAN is unavailable, helping users remain productive, make calls, and sustain communications locally in the branch. The HP MSR Small Survivable Branch (SSB)MIM module combines a Microsoft Lync survivable branch application with software from HP to deliver rich set of UC features such as instant messaging, voice, video and desktop sharing. The HP MSR SBM provides toll bypass and least cost routing over the public switched telephone network (PSTN) to reduce cost and improve user productivity.