Assessment of VoIP quality over Internet backbones

摘要: As the Internet evolves into a ubiquitous communication infrastructure and provides various services including telephony, it has to stand up toll quality standards set by traditional telephone companies. Our objective is assess what extent today's meets this expectation. assessment based on delay loss measurements taken over wide-area backbone networks, considers realistic VoIP scenarios uses measures appropriate for voice. findings indicate that although voice can be adequately provided some ISPs, significant number of paths lead poor performance even excellent end-systems. This makes strong case special handling traffic those paths. Even good paths, rare events occasionally cause perceptible degradation quality. Finally, choice playout buffer scheme each path was found critical importance perceived