Transitions a ddcmp link entity to the on state.  The ddcmp link
    entity defines the attributes of a link to a communications port
    that uses DDCMP.

    enable  [node node-id] ddcmp link link-name

    Example:

    enable ddcmp link ddcmp-0

1  –  Exception Messages

 o  device constraint

    The value of an attribute is not supported by the type of device
    used on the communications line. Modify the attribute to a
    suitable value, and retry the operation.

 o  open physical port failed

    The opening of the port in the Physical layer failed. The
    exception includes an argument that gives more information about
    the failure.

2  –  logical_station

    Sets the specified logical station associated with a
    particular ddcmp link entity to the "on" operational
    state.

    enable  [node node-id] ddcmp link link-name -
            logical station station-name

    Example:

    enable ddcmp link ddcmp-0 logical station ddcmp-0