diff --git a/application/Termination/Termination.php b/application/Termination/Termination.php
index 0d6b830e5..47313cb5e 100644
--- a/application/Termination/Termination.php
+++ b/application/Termination/Termination.php
@@ -219,62 +219,60 @@ class Termination extends mfBaseModel {
     
     return $code;
   }
-  
-  public function getLineworkportPairs() {
-    $ports = $this->getProperty("workflowitems")["ports"]->value->value_string;
-    $ist_port = $this->getProperty("workflowitems")["ist_ports"]->value->value_string;
-    if(strlen($ist_port)) {
-      $ports = $ist_port;
-    }
-    
-    if(!$ports) {
-      return [];
-    }
-    
-    $return = [];
-    $return["range"] = [];
-    $return["pairs"] = [];
-    
-    $ports = preg_replace('/[^0-9-]+/', "", $ports);
-    if(strpos($ports, "-") !== false) {
-      // port range
-      $this->log->debug("is range");
-      $port_parts = explode("-", $ports);
-      if(is_array($port_parts) && count($port_parts) == 2) {
-        $from = intval($port_parts[0]);
-        $to = intval($port_parts[1]);
-        
-        if($from > $to) {
-          $tmp = $from;
-          $from = $to;
-          $to = $tmp;
+
+    public function getLineworkportPairs() {
+        $ports = $this->getProperty("workflowitems")["ports"]->value->value_string;
+        $ist_port = $this->getProperty("workflowitems")["ist_ports"]->value->value_string;
+        if(strlen($ist_port)) {
+            $ports = $ist_port;
         }
-        
-        $range = [];
-        $pairs = [];
-        
-        
-        
-        for($i = $from; $i <= $to; $i++) {
-          $range[] = intval($i);
-          if($i + 1 <= $to) {
-            $pairs[] = $i."-".($i+1);
-          }
+
+        if(!$ports) {
+            return [];
         }
-        
-        $return["range"] = $range;
-        $return["pairs"] = $pairs;
-      }
-    } else {
-      // single port
-      $this->log->debug("not a range");
-      $return["range"][] = $ports;
+
+        $return = [];
+        $return["range"] = [];
+        $return["pairs"] = [];
+
+        $ports = preg_replace('/[^0-9-]+/', "", $ports);
+
+        $port_parts = false;
+        if(preg_match('/^(\d+)-(\d+)$/', $ports, $m)) {
+            $port_parts = [$m[1], $m[2]];
+        }
+
+        if(!is_array($port_parts) || count($port_parts) < 2) {
+            // not a valid port range, treat as single port
+            $return["range"][] = $ports;
+        } else {
+            // valid port range
+            $from = $port_parts[0];
+            $to = $port_parts[1];
+
+            if($port_parts[0] > $port_parts[1]) {
+                $from = $port_parts[1];
+                $to = $port_parts[0];
+            }
+
+            $range = [];
+            $pairs = [];
+
+            for($i = $from; $i <= $to; $i++) {
+                $range[] = intval($i);
+                if($i + 1 <= $to) {
+                    $pairs[] = $i."-".($i+1);
+                }
+            }
+
+            $return["range"] = $range;
+            $return["pairs"] = $pairs;
+        }
+
+        //var_dump($return);exit;
+        return $return;
+
     }
-    
-    //var_dump($return);exit;
-    return $return;
-    
-  }
   
   public function resetProperties() {
     $this->building = null;