The DNX-1u enables base station consolidation by integrating the functions of multiple network elements. This enables a multitude of services to share common transmission facilities. With up to eight (expandable to sixteen) T1 or E1 Short/Long haul interfaces, the DNX-1u eliminates the need for external CSU functionality. The Time-Slot Interchanger (TSI) enables grooming for cost-effective backhaul strategies and provides Automatic Protection Switch (APS) functionality that ensures network availability. Its PCM to ADPCM transcoder provides 2:1 compression of legacy voice traffic. Eight ports of 10/100 Ethernet connectivity, combined with layer 2 switching and channelized routing, eliminate additional devices such as hubs, switches, and routers. Two synchronous EIA-530/ITU X.21/V.35 interfaces provide access for Nx56/64 serial data, while six asynchronous EIA-232/ITU V.24 interfaces provide terminal server functionality to manage legacy equipment.