The most basic and conventional type of access control system
is a keypad.
They still have a lot of usage in commercial, industrial,
and retail settings, and to unlock the door, users must
enter a code. Although keypads can be installed as a
standalone device, controlling access to a single door
without the need for a key, fob, or access card, they
are typically standalone units.
They can function with practically any entry point
technology, including automatic gates, electric strikes,
and magnetic locks, thanks to advanced
engineering and design.