diff --git a/app/grandstream/app_config.php b/app/grandstream/app_config.php
index f3673393b5..278802ec7f 100644
--- a/app/grandstream/app_config.php
+++ b/app/grandstream/app_config.php
@@ -38,6 +38,14 @@
 		$apps[$x]['default_settings'][$y]['default_setting_enabled'] = "true";
 		$apps[$x]['default_settings'][$y]['default_setting_description'] = "Call Waiting 0-default, 1-enabled, 2-disable.";
 		$y++;
+        	$apps[$x]['default_settings'][$y]['default_setting_uuid'] = "3efa97d6-a35a-4371-b3db-efca7ef9b9b5";
+		$apps[$x]['default_settings'][$y]['default_setting_category'] = "provision";
+		$apps[$x]['default_settings'][$y]['default_setting_subcategory'] = "grandstream_call_waiting_ring";
+		$apps[$x]['default_settings'][$y]['default_setting_name'] = "text";
+		$apps[$x]['default_settings'][$y]['default_setting_value'] = "0";
+		$apps[$x]['default_settings'][$y]['default_setting_enabled'] = "false";
+		$apps[$x]['default_settings'][$y]['default_setting_description'] = "Call waiting ringing instead of playing call waiting tone when call waiting is on. 0-disabled (default), 1-enabled";		
+		$y++;
 		$apps[$x]['default_settings'][$y]['default_setting_uuid'] = "3a8841f3-e1c0-4eb1-abd3-068a3e3701a5";
 		$apps[$x]['default_settings'][$y]['default_setting_category'] = "provision";
 		$apps[$x]['default_settings'][$y]['default_setting_subcategory'] = "grandstream_gxp_time_zone";