For over 25 years Cortelco was a wholly owned subsidiary of IT&T. Since then, Cortelco Systems Puerto Rico, Inc., has become the second largest provider of telephone systems in Puerto Rico after PRT. For the past 49 years, we have been providing solutions to most of the business community in the island. Moreover, Cortelco has several professionals with expertise in IP convergence. These, along with our vast experience, are some of the differentiating factors that make Cortelco the vendor of choice for most enterprise solutions. Needless to say that, whenever necessary, our business partners provides full support in the development and implementation of complex and mission critical applications/solutions.