diff --git a/conf/Sccp.class.php.v431 b/conf/Sccp.class.php.v431
index 5a75ef6..4d3412e 100644
--- a/conf/Sccp.class.php.v431
+++ b/conf/Sccp.class.php.v431
@@ -34,8 +34,8 @@ class Sccp extends \FreePBX\modules\Core\Driver {
 			"prettyName" => _("Sccp Custom Driver"),
 			"shortName" => "SCCP",
 			"description" => _("Sccp Device"),
-			"Version" => "11.3.v431",
-			"about" => "Sccp mysql class Base ver: 11.3, Sccp ver: 431"
+			"Version" => "11.3.v432",
+			"about" => "Sccp mysql class Base ver: 11.3, Sccp ver: 432"
 		);
 	}
 /*        
@@ -91,7 +91,7 @@ class Sccp extends \FreePBX\modules\Core\Driver {
                         case 'secondary_dialtone_tone':
                         case 'dnd':
                             $sql .= ', '.$key;
-                            if (!empty($settings[$val]['value'])){
+                            if (!$this->is_my_blank($settings[$val]['value'])){
                                 $sqlv .= ", '".$settings[$val]['value']."' ";
                             } else {
                                 $sqlv .= ", NULL ";
@@ -409,6 +409,9 @@ class Sccp extends \FreePBX\modules\Core\Driver {
 		$devopts = $tmparr;
 		return $devopts;
 	}
+  public function is_my_blank($value) {
+    return empty($value) && !is_numeric($value);
+  }        	
   public function getDeviceHeaders() {
                 return array(
                         'secret' => array('identifier' => _('Secret'), 'description' => sprintf(_('Secret [Enter "%s" to regenerate]'),"REGEN")),