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CSU-DSU is short for Channel Service Unit/Data Service Unit. The CSU is a device that connects a terminal to a digital line. The DSU performs protective and diagnostic functions for a telecommunications line. Typically, the two devices are packaged as a single unit. Such a device is required for both ends of a T-1 or T-3 connection, and the units at both ends must be set to the same communications standard.


For more information about Avaya CSU-DSU Modules or Paradyne Acculink 3150 or Acculink 3160. Please contact or call (800) 955-6082.


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