That lock could trigger an alarm, and the alarm would trigger a closed-circuit TV camera. For example, if an employee is terminated and the database in the tenant's human resources department has been integrated into the Kastle card file, the fired worker will not be able to open the door. If the computer the employee used was secured through a Kastle card reader, there is no need to change the password because the card is dead. At buildings with that device, employees no longer have to dig out their plastic access card every time they want to get in. The proximity reader senses the card in the employee's pocket or purse and unlocks the door automatically.
Convenience comes with a cost, however.
Take the cost of a proximity reader and triple it. But there typically is not the need for that specificity in commercial buildings, and it is out of sight in terms of cost. This type of camera can be used to watch activity at remote sites. For example, using the Internet-camera system a retail manager could watch the store floor during a big sale and make necessary adjustments. Certain biometric devices.