diff --git a/src/mod/event_handlers/mod_rayo/mod_rayo.c b/src/mod/event_handlers/mod_rayo/mod_rayo.c
index e6b2d20322..66f59c9def 100644
--- a/src/mod/event_handlers/mod_rayo/mod_rayo.c
+++ b/src/mod/event_handlers/mod_rayo/mod_rayo.c
@@ -3674,6 +3674,10 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_rayo_load)
 		"<![CDATA[<grammar mode=\"dtmf\"><rule id=\"digits\" scope=\"public\"><item repeat=\"4\"><one-of><item>0</item><item>1</item><item>2</item><item>3</item><item>4</item><item>5</item><item>6</item><item>7</item><item>8</item><item>9</item></one-of></item></rule></grammar>]]>"
 		"</grammar></input>"
 		"</prompt>");
+	rayo_add_cmd_alias("input", "<input xmlns=\""RAYO_INPUT_NS"\" mode=\"dtmf\" initial-timeout=\"5000\" inter-digit-timeout=\"3000\">"
+		"<grammar content-type=\"application/srgs+xml\">"
+		"<![CDATA[<grammar mode=\"dtmf\"><rule id=\"digits\" scope=\"public\"><item><one-of><item>0</item><item>1</item><item>2</item><item>3</item><item>4</item><item>5</item><item>6</item><item>7</item><item>8</item><item>9</item><item>*</item><item>#</item></one-of></item></rule></grammar>]]>"
+		"</grammar></input>");
 
 	return SWITCH_STATUS_SUCCESS;
 }
diff --git a/src/mod/event_handlers/mod_rayo/nlsml.c b/src/mod/event_handlers/mod_rayo/nlsml.c
index 81f45dc6fb..e446d1bfd0 100644
--- a/src/mod/event_handlers/mod_rayo/nlsml.c
+++ b/src/mod/event_handlers/mod_rayo/nlsml.c
@@ -363,6 +363,37 @@ iks *nlsml_normalize(const char *result)
 	return result_xml;
 }
 
+/**
+ * @return true if digit is a DTMF
+ */
+static int isdtmf(const char digit)
+{
+	switch(digit) {
+	case '0':
+	case '1':
+	case '2':
+	case '3':
+	case '4':
+	case '5':
+	case '6':
+	case '7':
+	case '8':
+	case '9':
+	case '*':
+	case '#':
+	case 'a':
+	case 'A':
+	case 'b':
+	case 'B':
+	case 'c':
+	case 'C':
+	case 'd':
+	case 'D':
+		return 1;
+	}
+	return 0;
+}
+
 /**
  * Construct an NLSML result for digit match
  * @param digits the matching digits
@@ -387,7 +418,7 @@ iks *nlsml_create_dtmf_match(const char *digits)
 
 		SWITCH_STANDARD_STREAM(stream);
 		for (i = 0; i < num_digits; i++) {
-			if (isdigit(digits[i])) {
+			if (isdtmf(digits[i])) {
 				if (first) {
 					stream.write_function(&stream, "%c", digits[i]);
 					first = 0;