The ADTRAN Express 5200 is a family of Frame Relay access devices that provide a cost-effective means of transporting voice and multi-protocol data over Frame Relay and point to point networks. For customers looking for disaster recovery solutions, the units provide optional dial back up.The Express 5200 series is an economical means of providing high-quality voice and fax capabilities to remote locations without expensive toll charges. Voice options are supported through plug-in voice cards. Voice and data can share the same Permanent Virtual Circuit (PVC) eliminating unnecessary PVC charges. Complete control, configuration, and diagnosis are available through a 16-position keypad and a two-line by 16-character LCD display. VT 100 terminal configuration and control mode are also available through the control port. Flash download capability is implemented for installation of new features and enhancements.