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Explanation of the different levels of access control to a company area to succeed in security. Also refer to door, lock, key, electrical lock, buzzer, remote, alarm, guard, keypad, computerized, scheduling, card, Ron Kurtus, School for Champions. Copyright © Restrictions Levels for Controlling Access to Areas in a Companyby Ron Kurtus (2 January 2002) There are various levels of sophistication in controlling the access to a company's building or location and unlocking an entry door. These include manual entry with a key, remote electrical unlocking of a door, and computerized access control. Questions you may have include:
This lesson will answer those questions. There is a mini-quiz near the end of the lesson. Manually unlocking doorAt the lowest level of control, a door may be manually unlocked by the use of a key. In some cases a combination key-code is used to manually unlock the door. The advantages of this configuration are the low cost, low maintenance, and simplicity. Disadvantages of such a system are that keys can be lost or duplicates made, In locks may have to be changed when people leave company, and there is no record of who comes and goes. If a key-code is used, the code can be given to outsiders and the code may need to be changed when people leave the company. Remotely unlocking doorMany facilities allow access to the building or room by having a guard press a buzzer which electrically and remotely unlocks the door. The advantage of such a system is that control is given over who comes and goes. The guard can require a sign-in and a record is kept of people and times in the area. The main disadvantage is that this system requires a guard to be available to open the door. Also, the security system is only as reliable as the guard. Computerized control of lockThe third method to control access is computerized control. In this situation, a reader is required at the door, and the person must have a special card for the reader to scan. A computer processor decides if entry is allowed and then unlocks the door. A record of who enters and at what times can then be automatically recorded in a database. Most large hotels use a simple version of this with their electronic pass-keys. Large companies use very sophisticated computerized access control systems. The advantages are that entry schedules can be set to allow entry through select doors at specified times only to certain personnel, changes can be readily programmed in, and a complete record of activity is automatically kept. Disadvantages include high cost of equipment and software and the dependency on high technology. SummaryAccess through a door in a facility can be controlled at a very simple level with a lock and key, with better control using a remotely controlled electrical lock, or by using a high tech computerized access control system. Be logical in your approach ResourcesThe following are some resources on this topic. Web sitesBooksMiscellaneousMini-quiz to check your understanding1. What is the simplest way to keep people out of an area? 2. What is an advantage of remotely unlocking a door? 3. What is the best way to control access for only certain times? If you got all three correct, you are on your way to becoming a Champion in Security. If you had problems, you had better look over the material again. What do you think?Do you have any questions, comments, or opinions on this subject? If so, send an email with your feedback. We will try to get back to you as soon as possible. Share linkFeel free to establish a link from your website to pages in this site. Or use our form to send this link to yourself or a friend. Students and researchersThe Web address of this page is Please include it as a reference in your report, document, or thesis. Where can you go from here?
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