Access Control System
Access Control System is matter WHO, WHERE and WHEN. It determines WHO is allowed to enter or exit, WHERE they are allowed to enter or exit, and WHEN they are allowed to enter or exit. Furthermore all the activities are recorded. There are many applications use access control system such as Door Access Control System, Lift Access Control System and Car Park Control System, etc... From standalone units to large networked system.
When accessing, the Access Control will do 3 Steps: When a credential is presented to a reader, the reader sends the credential's information to a control pane. The control panel compares the credential's number to an access control list, grants or denies the presented request, and sends a transaction log to a database. When access is denied, the door remains locked. If there is a match between the credential and the access control list, the control panel operates a relay that in turn unlocks the door.
Mastech provides comprehensive access control solutions both hardwares and softwares to secure your facilities, assets and networks.
Controllers are connected to host PC via communication line. It make access decision when there is a request.
Keypads and Readers
All door hardware is connected directly to readers. The reader could be a keypad where a code is entered, it could be a card reader or it could be a biometric reader. Readers do not usually make an access decision, but send a card number to an access control panel that verifies the number against an access list.
The typical credential is an access card or more known as smart card. This smart card contains an embedded computer chip or a memory or microprocessor which stores and transacts data. This data usually associated with value, information or both which is stored and processed within the chip. The card data is transacted via a reader. There are two general categories of the Access Card: 1. Contact - Transmission of data takes place via physical contact points. 2. Contactless - Card that employs RFID between card and reader without physical insertion of the card. Required only close proximity to reader.
Biometric technologies include fingerprint, facial recognition, iris recognition, retinal scan, voice, and hand geometry can be used as credential to reader for system or building access.
Lift Access Control
Lift Access Control is designed for controlling the floor access and permitting the use of elevator only by authorized cardholder to enhance security of building.