The COMSPHERE 3800 Series Software-Defined (SD) modem family is based on Paradyne's award-winning architecture that allows new features and enhancements to be downloaded over the public telephone lines. The COMSPHERE 3800 family consists of four unique full-featured V.32bis modems that support a wide variety of modulation schemes and functionality in both dial and leased-line applications. Managed by the COMSPHERE 6700 Network Management System (NMS), the COMSPHERE 3800 family provides a cost-effective solution to network requirements.