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Serial Connections

A Router will have a serial connection to a CSU/DSU, which is the termination/demarcation point for the ISP, where the ISPs responsibility ends. The CSU/DSU then connects to the ISP cloud, and on the other end, there will be another CSU/DSU connecting to your remote side router.

CSU/DSU: Channel Service Unit / Data Service Unit​

  • DCE (Data Connection Equipment Device)
    • Provides clocking, the physical bit transfer rate between local and remote router.