1 files changed, 10 insertions, 1 deletions
diff --git a/microcom.h b/microcom.h
index e077ee5..e8ed544 100644
--- a/microcom.h
+++ b/microcom.h
@@ -120,8 +120,17 @@ int do_script(char *script);
 
 #define dbg_printf(fmt,args...)  ({ if (debug) printf(fmt ,##args); })
 
+/*
+ * Some telnet options according to
+ * https://www.iana.org/assignments/telnet-options/telnet-options.xhtmls
+ */
+
+#define TELNET_OPTION_BINARY_TRANSMISSION		0
+#define TELNET_OPTION_ECHO				1
+#define TELNET_OPTION_SUPPRESS_GO_AHEAD			3
+#define TELNET_OPTION_COM_PORT_CONTROL			44
+
 /* RFC2217 */
-#define COM_PORT_OPTION		 44
 #define SET_BAUDRATE_CS		  1
 #define SET_DATASIZE_CS		  2
 #define SET_PARITY_CS		  3