The analysis of performance measures in the network layer in different scenarios is presented to show that in the network layer not occurs the more significant delay and packet loss for VoIP. This work details parameters like delay, jitter, voice compression, packet loss, voice activity detection and packet loss in transport protocol, and explain how they can affect packet networks and give the standard of quality required for the service of voice on IP, same that to today has not been reached and optimized, reason why the service of voice has not achieved the success that like INTERNET can reach. One comparative analysis of different routing protocols with different classifications in the TOS field of IPv4 and with different schemes from voice. The results were obtained from simulations performed in OPNET software. Not using models like: RSVP, MPLS or RTP, analyze the performance of the model proposed to demonstrate that the more significant delay or latency for the voice in the packet networks occurs in the transport layer, and conclude that the network layer works offers some possible alternatives to alleviate this parameter that can cause noticeable speech degradation.

Master of Science in Electronic Engineering Major in Telecommunications