It is a call which is made over internet protocol (VoIP). For example,
one can call using Google Voice to other recipient located miles away. Such
call can also be international.
With the release of Plantronics CS520 its producer once again raised the bar requirements for headsets for desk phones, ensuring users in a new degree of freedom of movement. This model features advanced audio technology and stylish design along with high reliability. For long conversations Plantronics CS520 is the best solution in an active call-center or in the office. The presence of two speakers in this model ensures that no external noises will interrupt an important conversation.