It is a device capturing and controling all the signals, which are being created by the whole system, especially the made and received phone call signals. The device is mostly used for connecting regular phone system with the Internet and backwards.
Mostly suited for small and medium conference room need, the Phoenix Audio Duet PCS USB speakerphone has full duplex sound and advanced echo cancellation technology. The device is connected to a PC using USB port, ensuring power supply to the microphone and the built in speaker. Duet PCS is a small device, which does not require a lot of space on your desk. Additionally it can be connected to other Duet PCS therefore to be converted from a desktop speakerphone into a medium size speakerphone in a conference room, what it makes it a great choice for office and relatively small departments.