This paper Intends to tackle the topic of company communication media andtheir role in interpersonal communication processes in middle-size organizationsof service sector in Medellin city (Colombia). The scope of this research is basedon the research Project: “More media than communication in organizations: evaluation of relation between internal media communication and information and interpersonal communication inside middle-size organization of service sector in Medellin city from a Corporative communication perspective,” a research in progress by CORPUS (Corporative Communication)Research Group, adscript to Universidad de Medellin School of Communications, and recognized in Category C by Colciencias.This project clearly supports the statement that organizations under analysisdevelop different communication processes with their audiences, mainly internalprocesses directed more to information that to communication which impactinterpersonal communication processes. Middle-size organizations analyzed usemore mass media than communication media, because they rely more in themass media than in possible human interactions, thus preventing humaninteractions and generating an information society and a mass society, everyday further from its essence: society