INTERCOMS AND ACCESS CONTROL
Loud alarms can offer a range of intercom systems you have audio only which can be speech both ways to speak to someone before you grant them access or video intercoms where you can speak and see someone before you grant them access.
Intercoms can be used in a number of different buildings such as multiple occupant buildings or offices to keep the premises secure and not having to go to the door all the time simple release the door from the handset.
Access control systems are the ideal alternative to locks and keys and are particularly useful to keep business properties secure.
You can have small systems interlinked to a computer or large systems interlinked to a computer or even individual doors with either keypad or proximity tags.
There are many different other uses for access control such as time keeping, clocking in/out system, and restricting access to certain users.