How does Carrier Detect (CD) operate on a DSU

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    Article ID: 1907
    Q&A

     

     

      How does Carrier Detect (CD) operate on a DSU?


     

    Q:

    How does Carrier Detect (CD) operate on a DSU?

     

     

    A:

    A far end DSU will only have Carrier Detect (CD) high if the near end DSU is sending a Clear to Send (CS) signal, whether it is forced on or following a Request to Send (RS) from the DTE equipment.  CD will not be up just because the line is up.