Microsoft announced on Wednesday that it has acquired an internet voice communication startup - Media-streams.com, a 23-employee firm based in Zurich - the second such acquisition in recent months, reports CNET. Financial terms were not disclosed. Microsoft bought voice over internet protocol firm Teleo in August. Teleo's technology is aimed at consumers and has been incorporated into MSN, Media-streams' applications are designed for businesses. Microsoft plans to link the software to its corporate instant message system and Office productivity applications.