What is the difference between Access Control and Door Entry systems?

With an access control system, the user has a keyfob, swipe card or access code to allow them to open a door, gate, or any kind of entrance. A door entry, or intercom, system has a panel at the entrance and the visitor can then talk to somebody within the property who can then decide whether to grant access via the entry system. Access control systems are typically used on sites which require automated management of the right of individuals to access specific areas of a site.