There is no special configuration users need to make in order to generate bi-directional RTP streams. Abacus is default to send bi-directional RTP streams, unless users have chosen to perform packet path confirmation on a simplex mode. When there is audio signal in place, the RTP stream will be encoded and conveyed via the RTP stream. When there is no audio sin gal in place, the RTP stream may send an idle pattern, or comfort noise, depending on the codec characteristics and setting in the GUI.