We've had issues with an application that leverages Cisco TSP and found there used to be an issue with RDP and TAPI/TSP instability (see below). Is this still an issue? The server is Windows 2012 R2 (64 bit).
Access to the Cisco Unified Attendant Console Advanced server is not supported at any time via Remote Desktop (RDP), Terminal Services (TS) or any other session-based application. These applications can cause TAPI/TSP and Wave Driver instability. Only local or VNC connection is supported. For more information, see http://support.microsoft.com/kb/308405