The technology needs of the financial system arising from expansions in infrastructure, leading to the innovation of its telecommunications platforms. In this regard, it has increased the demand for so-called: analysis of network traffic Corporate Voice—ATRVC—. They involve the assembly of topologies, simulations and statistics based on descriptive studies, seeking to predict the behavior of resources, so that from these, banks, assertive, adapt or extend their infrastructure efficiently and ensure the availability and reliability platforms to their internal and external users. This article describes a ATRVC, using Opnet Modeler software support®. The simulations, compared’s occupation of the platform before and after a projected expansion process, identifying points of congestion or underutilization of bandwidth, compression and channels to accommodate traffic flows to the physical elements of the network.