ADTRAN 1204001L1 4-WIRE SW56 DBU CARD EXPANSION MODULE

The ADTRAN ESP card provides an interface between T1 or Fractional T1 service and the customer's data terminal equipment (DTE). The ESP provides access to traditional dedicated point-to-point T1 circuits as well as Frame Relay services. The ESP card supports synchronous data rates from 56 kbps to 1.536 Mbps at Nx56 or Nx64 kbps. A single V.35 physical interface provides a connection to the end user's DTE.