The opportunity to migrate telephony and voice applications from TDM circuit-switched networks to IP packetswitched networks offers many advantages for enterprise network managers. The current state of Voice over IP (VoIP) technologies allows companies with dedicated WAN resources to leverage their infrastructures for voice and data applications, and realize cost savings in the process. With a single, integrated network in place of two disparate networks, enterprises can consolidate staffing and streamline operations. In addition, the integration of voice and data content onto a single technology platform creates the potential for the development of new, interactive applications that may increase productivity or streamline operations. VoIP's biggest boon is increased functionality. There are thousands of possible applications for VoIP phones, and as companies open up their code to developers, more niche applications are likely to develop. With proper implementation and training, these systems can boost productivity for a broad range of companies.