And then there's Cisco Systems. Much has been made of the "coopetition" between Cisco and Microsoft as the two prepare to lock horns in the VoIP space. Solution provider Dimension Data ...

and we're actually still seeing that battle going on between TDM and VoIP," said the source, who requested anonymity. Microsoft also took the wraps off the Office Communications Server Quality of ...

Microsoft claimed a bigger stake in the internet telephony market this month with its acquisition of US voice over IP (VoIP) specialist Teleo. The deal is seen as a move to counter similar ...

One of the biggest rivals for Skype in the VoIP app scene is Viber ... Windows Store site states that Viber "worked closely with Microsoft to provide the best possible" Windows 8.1 experience.