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Product Data Sheets (pdf)...Network Termination Unit-1 (NTU-1)


Product Data Sheets (pdf)...Modular Modem Eliminator



Product Data Sheets (pdf)...Synchronous Modem Eliminators


Black Box Explains...DDS vs. T1.

DDS (Digital Data Service) is an AT&T® service that transmits data digitally over dedicated leased lines. DDS lines use four wires, and support speeds up to 56 kbps; however, DDS... more/see it nowis actually a 64-kbps circuit with 8 kbps being used for signaling. You can also get 64-kbps (ClearChannel™) service. Since the transmission is digital, no modems are needed. Dedicated digital lines are ideal for point-to-point links in wide-area networks.

T1 is a dedicated transmission line operating at 1.544 Mbps. It’s comprised of 24 DSOs, each supporting speeds of 64 kbps. The user sends data at N x 56 or N x 64 over T1 circuits. T1 operates over twisted-pair cable and is suitable for voice, data, and image transmissions on long-distance networks. collapse


  • Manual... 
  • T1/FT1 CSU/DSU User Manual
    User Manual for the MT1500A (Version 1)
 

Product Data Sheets (pdf)...Communications Adapter Plus (CAP) User-Programmable Communications Adapter Plus (CAP)


Product Data Sheets (pdf)...Modem 3600


Product Data Sheets (pdf)...Smart 64K CSU/DSUs

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