code: @Override
  	public FaxResult[] getFaxResultRN(String corpNum, String requestNum)
  			throws PopbillException {
  		if (requestNum == null)
  			throw new PopbillException(-99999999, "전송요청번호가 입력되지 않았습니다.");
  
  		return httpget("/FAX/Get/" + requestNum, corpNum, null,
  				FaxResult[].class);
  	}
docs: /*
  (non-Javadoc)
  @see com.popbill.api.FaxService#getFaxResultRN(java.lang.String, java.lang.String)