+#define CHAR_FOR_ANSWER_SUCCESS 'T'
+#define CHAR_FOR_ANSWER_FAIL 'F'
+#define CHAR_FOR_EVT_BROADCAST '*'
+#define CHAR_FOR_EVT_ADD '+'
+#define CHAR_FOR_EVT_DEL '-'
+#define CHAR_FOR_EVT_PUSH '!'
+#define CHAR_FOR_EVT_SUBSCRIBE 'S'
+#define CHAR_FOR_EVT_UNSUBSCRIBE 'U'