Fixed communications or via GSM are a key issue in today’s companies. The speed of events, support of business and allocated to projects outside the office environment teams, as well as decisions that often have to be made quickly require constant need for communication, can cause constraints in production. IP telephony enables communications to be made as the traditional way, with the advantage of reducing costs, since telephone calls run over the data network rather than the telephone operator and enable the number of additional features when integrated with other applications: video conferencing, voicemail, call recording, auto attendant, taxation, diversion to GSM or other alternatives. The integration of IP telephony is an opportunity to develop new and more effective security policies, processes and infrastructure.