The ADTRAN DSU 5600 provides a cost-effective solution for termination of 56 or 64 kbps DDS services. The unit is a very economical solution for single port point-to-point or multi-point applications. Microprocessor and VLSI technology enhance the capabilities of the DSU 5600, which is housed in an attractive, slim line, stand-alone, wall-mount, or rackmount enclosure.