Another crucial element that a business owner should put inside their establishment is door entry systems and intercoms. Intercoms will allow you to directly contact the employee that you want to talk to without the hassle of going to their cubicle.
Door entry systems will also protect all the areas of your building with doors because it will require people to either have an ID, code, card, etc. to access certain areas of your establishment.
Having these two combined will put additional security to your business because people would be required to identify themselves before they can go in or out of your establishment.