The fact that many companies are adopting Voice over Intenet Protocol (VoIP) also means that there are many VoIP services fighting over the market. This has led to various protocols, packages, and services that are sometimes incompatible with each other. This issue had been a major concern for small businesses. While they may want to adopt VoIP for their communication needs, due to their cheaper costs, these compatibility issues hinder them from fully entrusting their operations to such a service.