Adtran 1200208L1 Express 5210

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, SLIP, IP, PPP (both synchronous and asynchronous), Frame Relay, BOP, and asynchronous protocols. The DTE ports can be configuredindependently, providing support for multiprotocol applications. A Dial Backup (DBU) feature allows automatic or manual backup upon interruption of Frame Relay or DDS services. The addition of DBU is accomplished through plug-in cards: 4-wire Switched 56, V.34 modem, and 1B+D ISDN. The units monitor both the physical link and the Frame Relay signaling to determine if an interruption has occurred. Once detected, the host unit initiates a dial-up call around the Frame Relay network and merges backup traffic, with the primary traffic still being received from unaffected remote sites. The DTE device still receives all data as Frame Relay traffic, allowing a transparent backup transition. Once the failed condition has been cleared and the Frame Relay interruption is over, the unit automatically restores traffic to the primary link. Complete control, configuration, and diagnosis are available through a 16-position keypad and a two-line by 16-character LCD display. VT100 terminal configuration and control mode are also available through the control port. Remote access is also available through inband Telnet. Flash download capability is implemented for installation of new features and enhancements.