diff --git a/lib/app.php b/lib/app.php
index 8ee128f..06f45b6 100755
--- a/lib/app.php
+++ b/lib/app.php
@@ -783,8 +783,9 @@ public static function renderSingleCardParameter($aCon,$Name,$depth=1,$pref=0,$b
 			
 			foreach($aCon[$Name] as $Info){
 				$sReturnTypeOutput='';
-				
-				if((array_key_exists('TYPE',$Info['parameters']) || array_key_exists('X-SERVICE-TYPE',$Info['parameters'])) &&  array_key_exists('PREF',$Info['parameters'])){
+
+				if((array_key_exists('TYPE',$Info['parameters']) || array_key_exists('X-SERVICE-TYPE',$Info['parameters']))
+					&&  ((array_key_exists('PREF',$Info['parameters'])) || count($aCon[$Name]) == 1)){
 					//\OCP\Util::writeLog(self::$appname,'Tel PREF: '.$Info['parameters']['PREF'], \OCP\Util::DEBUG);
 					if(array_key_exists('TYPE',$Info['parameters'])){
 						foreach($Info['parameters']['TYPE'] as $TypeInfo){