diff --git a/application/Contractconfig/hooks/Voip.php b/application/Contractconfig/hooks/Voip.php
new file mode 100644
index 000000000..06ba1d585
--- /dev/null
+++ b/application/Contractconfig/hooks/Voip.php
@@ -0,0 +1,42 @@
+<?php
+
+class Contractconfig_Hook_Voip extends Contractconfig_Hook {
+  private $my_product_attributes = ["needs_number"];
+  
+  /*
+   * Checks to determine if class needs to work on contract.
+   */
+  public function isResponsible(Contract $contract) {
+    
+    /*
+     * Test for standard checks
+     * (Only Producttech attributes for now)
+     */
+    if(!parent::isResponsible()) {
+      return false;
+    }
+    
+    // do additional checks
+    
+  }
+  
+  public function init() {
+    
+  }
+  
+  public function beforeSave() {
+    
+  }
+  
+  public function afterSave() {
+    
+  }
+  
+  public function beforeDelete() {
+    
+  }
+  
+  public function afterDelete() {
+    
+  }
+}
\ No newline at end of file