This object specifies the type of switching element used to
implement this cross-connect.
The value 'opticalCrossConnect' applies only when there is no
optical-to-electrical conversion performed to implement the
cross-connect.
The value 'autoSelect' indicates the agent should figure out
the switch type to use. The value 'autoSelect' is a write-only
value and should never be returned when this object is read.
If the manager activates the row before setting this object,
the value may be chosen by the agent.