The introduction of new diagnosis treatment systems and devices in hospital environments presents an enormous challenge in terms of strategies and operational planning. These systems, which are generally interconnected, generate huge volumes of information of a heterogeneous nature that may be processed using resources that are external to the hospital. Correct design of hospital communications would result in a better quality of service, and reductions in costs, especially in environments with convergent communication networks where all communication shares a common infrastructure. The analytical dimensioning of a Smart-Hospital telecommunications is a complex task due to the large number, and heterogeneity, of the devices involved. In this case, the use of simulation tools to dimension these communications gives better flexibility and can be carried out at a reasonable cost. A tool has been designed for the specific simulation of hospital communications which makes use of an arbitrary collection of connected services with Metro-Ethernet access. This present work evaluates the communication dimensioning of a hypothetical hospital offering a range of medical services. The results obtained: loss of information, delay and jitter will be used to design capacities and types of service contracted from the telecommunications carrier.