Microsoft Acquires VoIP Firm

Microsoft (MSFT Quote) said late Tuesday it added to its portfolio a small San Francisco start-up whose technology lets users make phone calls over the Internet.

The privately held company, Teleo, launched its voice-over-Internet protocol, or VoIP, service in February targeting mobile professionals who rely primarily on email and cell phones for communications.

Founded in 2003, Teleo designed its service and software to be closely integrated with Microsoft Outlook and Internet Explorer. Teleo allows users to make calls by simply clicking on a number on their screen, whether it's in an address book or on a Web site. ...