Impact of the codec and various QoS methods on the final quality of the transferred voice in an IP network
Oldřich Slavata, Jan Holub · Journal of Physics Conference Series · 2015
This paper deals with an analysis of the relation between the codec that is used, the QoS method, and the final voice transmission quality. The Cisco 2811 router is used for adjusting QoS. VoIP client Linphone is used for adjusting the codec. The criterion for transmission quality is the MOS parameter investigated with the ITU-T P.862 PESQ and P.863 POLQA algorithms.