code: @Override
      protected void updateFaxJob2HTTPRequestConverterConfiguration(Map<String,String> configuration)
      {
          //get API key/secret
          String apiKey=this.getConfigurationValue(FaxClientSpiConfigurationConstants.API_KEY_PROPERTY_KEY);
          String apiSecret=this.getConfigurationValue(FaxClientSpiConfigurationConstants.API_SECRET_PROPERTY_KEY);
          
          //validate data
          if((apiKey==null)||(apiSecret==null))
          {
              throw new FaxException("Missing phaxio API key/secret values.");
          }
  
          //get property part
          String propertyPart=this.getPropertyPart();
  
          //modify configuration
          configuration.put(MessageFormat.format(FaxJob2HTTPRequestConverterConfigurationConstants.SUBMIT_ACTION_FILE_CONTENT_PARAMETER_NAME_PROPERTY_KEY.toString(),propertyPart),"filename");
          configuration.put(MessageFormat.format(FaxJob2HTTPRequestConverterConfigurationConstants.SUBMIT_ACTION_TARGET_ADDRESS_PARAMETER_NAME_PROPERTY_KEY.toString(),propertyPart),"to");
          configuration.put(MessageFormat.format(FaxJob2HTTPRequestConverterConfigurationConstants.SUBMIT_ACTION_SENDER_FAX_NUMBER_PARAMETER_NAME_PROPERTY_KEY.toString(),propertyPart),"caller_id");
          configuration.put(MessageFormat.format(FaxJob2HTTPRequestConverterConfigurationConstants.CANCEL_ACTION_FAX_JOB_ID_PARAMETER_NAME_PROPERTY_KEY.toString(),propertyPart),"id");
          configuration.put(MessageFormat.format(FaxJob2HTTPRequestConverterConfigurationConstants.GET_FAX_JOB_STATUS_ACTION_FAX_JOB_ID_PARAMETER_NAME_PROPERTY_KEY.toString(),propertyPart),"id");
          configuration.put(MessageFormat.format(FaxJob2HTTPRequestConverterConfigurationConstants.ADDITIONAL_PARAMETER_PROPERTY_KEY_PREFIX.toString()+"api_key",propertyPart),apiKey);
          configuration.put(MessageFormat.format(FaxJob2HTTPRequestConverterConfigurationConstants.ADDITIONAL_PARAMETER_PROPERTY_KEY_PREFIX.toString()+"api_secret",propertyPart),apiSecret);
      }
docs: Hook for extending classes.
  
  @param   configuration
  The converter configuration