code: @Override
      protected FaxJobStatus getFaxJobStatusImpl(FaxJob faxJob)
      {
          //validate fax job ID
          WindowsFaxClientSpiHelper.validateFaxJobID(faxJob);
          
          return super.getFaxJobStatusImpl(faxJob);
      }
docs: This function returns the fax job status.<br>
  Not all SPIs support extraction of the fax job status.<br>
  In case the SPI is unable to extract or does not support extracting
  of the fax job status, it will return the UNKNOWN status.
  
  @param   faxJob
  The fax job object containing the needed information
  @return  The fax job status