The following article show the results obtained of an investigation project on the analisys and requirements for the creation of an architectonic model of multimedial communications and the implementation of a software component that allows to make the transmission of audio through Internet in real time. For this development it was necessary to determine functional elements at logical level like transmissions of type multicast, protocols of routing and elements at logical level like transmissions of type multicast, protocols of routing and elements of encoding for the transmission of audio by Internet; in the same way physical elements by means of the implementation of techniques of routing multicast was detemined on routers to guarantee the communication at level of Internet and to determine connectivity towards the outside.