diff --git a/src/mod/applications/mod_dptools/mod_dptools.c b/src/mod/applications/mod_dptools/mod_dptools.c
index d5bb693bb8..487d9e450d 100644
--- a/src/mod/applications/mod_dptools/mod_dptools.c
+++ b/src/mod/applications/mod_dptools/mod_dptools.c
@@ -443,7 +443,7 @@ SWITCH_STANDARD_APP(set_audio_level_function)
 	
 }
 
-#define SET_MUTE_SYNTAX "[read|write] [true|false]"
+#define SET_MUTE_SYNTAX "[read|write] [[true|cn level]|false]"
 SWITCH_STANDARD_APP(set_mute_function)
 {
 	char *argv[2] = { 0 };
@@ -459,8 +459,10 @@ SWITCH_STANDARD_APP(set_mute_function)
 						  switch_core_session_get_name(session), SET_MUTE_SYNTAX);
 		return;
 	}
-
-	level = switch_true(argv[1]);
+	
+	if ((level = atoi(argv[1])) <= 0) {
+		level = switch_true(argv[1]);
+	}
 	
 	switch_ivr_session_audio(session, "mute", argv[0], level);
 	
diff --git a/src/switch_ivr_async.c b/src/switch_ivr_async.c
index 6c3bce19b4..1943c354a4 100644
--- a/src/switch_ivr_async.c
+++ b/src/switch_ivr_async.c
@@ -1391,7 +1391,11 @@ static switch_bool_t session_audio_callback(switch_media_bug_t *bug, void *user_
 
 	if (frame) {
 		if (mute) {
-			switch_generate_sln_silence(frame->data, frame->datalen / 2, 400);
+			if (mute > 1) {
+				switch_generate_sln_silence(frame->data, frame->datalen / 2, mute);
+			} else {
+				memset(frame->data, 0, frame->datalen);
+			}
 		} else if (level) {
 			switch_change_sln_volume(frame->data, frame->datalen / 2, level);
 		}