
The transaction is expected to close in the second half of this year. The activities will be incorporated in Ericsson's Business Unit Support Solutions. No financial details were disclosed.
The Mediaroom operations are based in Mountain View, California and employ more than 400 people worldwide. Microsoft's IPTV customers include AT&T, Deutsche Telekom, Beeline and Telefonica, serving 22 million set-top boxes in 11 million subscriber households worldwide.
Microsoft said it will focus its TV activities in future on its Xbox gaming console. Xbox has sold 76 million units to date and counts 46 million members of the online service Xbox Live.