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.The Express 5200 provides multi-protocol support through two serial interfaces that can support EIA-232 and V.35 operating at rates from 2.4k to 512k. The series supports SNA, SDLC, Bisync, SLIP, IP, PPP (both synchronous and asynchronous), Frame Relay, BOP, and asynchronous protocols. The DTE ports can be configured independently, providing support for multi-protocol applications. The Express 5210 provides the same multi-protocol support through a single serial interface but also includes an integrated 10BaseT Ethernet port that supports full IP routing.In addition to voice and dial back up, the Express 5210 also supports IQ Frame Relay performance monitoring. This includes statistics on through put and utilization per port and PVC, availability, lost frames and PVC state, excess bursting above CIR, network congestion (FECN, BECN, and DE), and end-to-end delay on any or all PVCs.