Compare Adtran DSU III DBU S2W (1200067L1) to Adtran (1200169L1#GOV) T1 / FT1 Modem

The ADTRAN DSU III DBU, a high-performance rackmount data channel service unit (DSU/CSU), provides an interface between the digital data service (DDS) and the customers data terminal equipment (DTE) while providing automatic switched dial backup (DBU) of the dedicated circuit. This is the 1B+D ISDN DBU. When the DSU III DBU is configured for dedicated service with switched DBU, the user selects options to qualify a dedicated line failure. Upon line failure recognition, the DSU initiates connection to the remote unit over the switched network. Upon restoral of the DDS circuit, the unit automatically or manually reverts to the restored DDS circuit. ??Another feature is DTE-to-service rate matching, for dedicated and switched DBU modes. This feature allows slower rate DTE equipment to communicate over a higher speed digital line. In the DBU mode, dialing is accomplished automatically (with stored numbers) or manually. The unit responds to standard loopback commands from the telephone ... Less

Single port T1/FT1 SNMP DSU/CSU provides an interface between T1 or Fractional T1 service and the customer's Data Terminal Equipment (DTE). The TSU ESP provides access to traditional dedicated point-to-point T1circuits as well as Frame Relay services. The TSU ESP 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. Less