tsmsvc.exe is associated with T-DSL SpeedManager which is mainly distributed in german. Translated information page here.

Quote:
With this software the channel transfer rate of the current DSL connection can be measured and indicated in the InterNet. The speed manager supports routing and multi-station systems, as well as all telephone systems with DSL functionality.

Thus you optimize your operating system for a maximum information flow-rate over a DSL connection in the InterNet. A connecting test between the PC and the DSL entrance permits a statement immediately to the function of the connection.