This is a way of communicating on the half-duplex communication line, includes receiving and transmitting devices (walkie-talkie) by the way of pressing the button for switching to the voice mode or transition to the listening mode. It works as a radio speaker; one can talk by pressing the button and can listen to a voice message by releasing the button.
Symmetric Broadband, a Peer 1 Network company, was founded to provide a high performance VoIP network utilizing Peer 1`s facilities and fully redundant dedicated IP network.