definition
strict definition
access control manufacturer
A company that manufactures access control systems, especially barriers to ensure payment or belonging upon entry or exit.
An access control manufacturer is a company that provides a building's system or equipment for controlling access of vehicles or persons, depending on payment, tenancy, membership, visitation rights, etc.
Equipment may include barriers, ticket machines, card readers, biodata checks, etc.
The equipment makes entry or exit depend on an entitlement or condition, such as a paid ticket or tenancy. That access decision is different from the movement of a door alone: an automatic door can open on approach without deciding whether the approaching person is entitled to enter.