Polycom's vision is a world united by video. The company makes video-conferencing and immersive telepresence (which combines digital audio, video, and content sharing) systems that let users collaborate as if they were in the same room. Its products combine camera, microphone, network connection, and external audio and video devices. The company also offers PC-based phones that transmit both voice and video. Polycom's software enables users to manage conferencing locations and connect with them using ISDN and Internet protocol connections. It partners with the likes of Microsoft and IBM to develop open standards-based products. Polycom was sold to Siris Capital Group for $1.8 billion in 2016.