As discussed, We need to comfirm if he is the one to design the system or whether he is contracting it out. But if he is the one designing the system then we want to know
1.... if he can design a 10, 15 and 20 stations detection systems.2.....we would need 12 pieces of 10 stations detection system, 6 pcs of 15 stations detection sys and 4 pcs of 20 stations system.The price and discount of each and development time should be confirmed
in addition, a large memory is needed to be able to hold large volume of advert traffic.