gistfile1.php

  function device_is_voxserver_compat($dev, $allow_custom = false)                                          
  {                                                                                                         
    if($dev['devtype_group_id'] != VOXSERVERS_DEVICE_GROUP_ID)                                              
      return false;                                                                                         
                                                                                                            
    if($allow_custom)                                                                                       
      return true;                                                                                          
                                                                                                            
    $dev_config_id = $dev['metadata']['voxserver_sellable_config'];                                         
    //make sure $this->configs s initialized.                                                               
    $this->get_configurations_from_vss();                                                                   
    return (isset($dev_config_id) && !empty($dev_config_id) &&                                              
            $dev_config_id !== 'na' &&                                                                      
            array_key_exists($dev_config_id, $this->configs));                                              
  }