Package-based services are affected by different network parameters and conditions that can deteriorate the quality of the transmitted services, especially those that are provided in real time. In this paper, result of an undergraduate research project, the bases for the construction of a QoS model are defined for a video call on an IMS network, specifying the most adequate parameters to estimate its QoS, the infrastructure used, and the tests developed. The results indicate the possibility of improving the QoS by applying the
