Index: modules/branches/2.10/core/functions.inc.php
===================================================================
--- modules/branches/2.10/core/functions.inc.php (revision 13074)
+++ modules/branches/2.10/core/functions.inc.php (revision 13080)
@@ -1440,5 +1440,5 @@
 					$vm = ((($exten['voicemail'] == "novm") || ($exten['voicemail'] == "disabled") || ($exten['voicemail'] == "")) ? "novm" : $exten['extension']);
 
-					$ext->add('ext-local', $exten['extension'], '', new ext_execif('$[${DB(AMPUSER/'.$exten['extension'].'/ringtimer)} > 0]','Set','__RINGTIMER=${DB(AMPUSER/'.$exten['extension'].'/ringtimer)}'));
+					$ext->add('ext-local', $exten['extension'], '', new ext_set('__RINGTIMER', '${IF($[${DB(AMPUSER/'.$exten['extension'].'/ringtimer)} > 0]?${DB(AMPUSER/'.$exten['extension'].'/ringtimer)}:${RINGTIMER_DEFAULT})}'));
 					
           $dest_args = ','.($exten['noanswer_dest']==''?'0':'1').','.($exten['busy_dest']==''?'0':'1').','.($exten['chanunavail_dest']==''?'0':'1');
@@ -1695,4 +1695,10 @@
 			foreach($globals as $global) {
 				$value = $global['value'];
+
+				// Ticket # 5477 Create a default value that can't be polluted
+				if ($global['variable'] == 'RINGTIMER') {
+					$ext->addGlobal('RINGTIMER_DEFAULT', $value);
+					continue;
+				}
 				$ext->addGlobal($global['variable'],$value);