Can two sets of access control systems of a company communicate with each other?

According to the actual situation, if it is an ID proximity card, it can be swiped. As long as this card is authorized as a legal card in each access control system, it can be used in its corresponding access control system.

Two different access control systems set the induction card A as a legal card, so this card A can be swiped at will in these two access control systems.

If it is an IC card, it can't be used, because IC cards can be encrypted. The typical one is the rice vending machine in the canteen, and the consumed cards cannot be used in different systems at will.