Primary Rate Interface Multiplexer provides an efficient and cost-effective platform to convert 30, dial-up, analog voice circuits to a digital E1, PRI ISDN interface. The Multiplexer bridges the gap between the analog and the digital E1 world by providing an intelligent interface to connect E1, PRI ISDN to 30 analog telephone sets. The Multiplexer can be used to connect fully digital Corporate LANs and ISP Equipment and Networks with E1, PRI ISDN interfaces to analog PSTN circuits, or analog equipment. Primary Rate Interface Multiplexer is ideal for Corporate and ISP customers who wish to connect their equipment with E1, PRI ISDN digital interfaces to analog telephone sets.