Can the controller panel in a SL1600 be swapped for a controller panel in a SL4800 or SL9600TW? September 29, 2020 18:08 Updated Yes. All SmartLine controller panels are interchangeable. Related articles Does My Controller Need to be Upgraded to Work with the SmartLink Aircard? How do I replace the SmartLine or ProLine control panel? What is the difference between the ProLine controller and the SmartLine controller? SL1600 Controller Installation Instructions Activate SmartLink Network with a Pre-Purchased Plan Card