The Allworx PRI Phone System is designed for companies with up to 250 users, the Allworx 48X system is a state-of-the art communications system. The system integrates a feature-rich phone system and robust data network system with advanced features that substantially improve your company's productivity while saving you on-going costs. Finally, you have an exciting, new communications technology that???s designed specifically for small and medium businesses. The Allworx 48X provides enterprise-class features such as integrated T1/PRI and T1 data capability. This system also delivers all of the other commonly offered Allworx system features such as custom call routing, presence management, call center control, remote user access, and site-to-site connectivity that delivers direct savings and productivity gains to your business. The Allworx 48X provides the flexibility for businesses to choose from a number of different connections to access both voice and data (T1, T1/PRI, Cable, DSL).