code: @Override
      public String sendSMS(String CorpNum, String sender, String content,
                            Message[] Messages, Date reserveDT, Boolean adsYN, String UserID, String requestNum)
              throws PopbillException {
          return sendMessage(MessageType.SMS, CorpNum, sender, null, null, content,
                  Messages, reserveDT, adsYN, UserID, requestNum);
      }
docs: /*
  (non-Javadoc)
  @see com.popbill.api.MessageService#sendSMS(java.lang.String, java.lang.String, java.lang.String, com.popbill.api.message.Message[], java.util.Date, java.lang.Boolean, java.lang.String, java.lang.String)