Real Estate Investor Magazine South Africa June 2013 | Page 53

COMMERCIAL
Your inner perimeter security
Your inner perimeter security involves doors
and windows of your commercial building.
Locks, keys and alarm systems are your tools for
inner perimeter security. An electronic access
control system works well for many businesses.
An alarm system can tell you when your inner
perimeter security system has been breached.
When designing any perimeter security system,
be careful not to lose control of your keys. If an
unauthorised person can make copies of your
keys without your knowledge, then you have a
serious security weakness.
Your interior security
Interior security involves the inside of your
commercial building. Security cameras and
motion detectors are great tools for monitoring
your valuable resources as well as providing
evidence should a break-in occur. Access
control systems can be used to control access
to key spaces within your business, including
the valuable information on your computers
systems.
What do you need to know about security
cameras?
1 Preventing internal theft, drug use and
violence; these are all valid reasons for
surveillance in the workplace. Such activities
can cost your business plenty in terms of lost
inventory, decreased productivity and injury.
But while you are responsible to protect your
company’s bottom line, you also need to respect
your staff’s right to privacy.
2 In order to realise maximum investigative and
deterrent value from your cameras, you need to
carefully choose where you place them.
3 Bright light, such as direct sunlight, can ruin
your video images.
4 Recording your the images from your video
cameras allows you to investigate crimes or
accidents after the fact.
5 Even though the market is flooded with DIY
video equipment, an experienced professional is
well worth the added expense.
Electronic access control systems
How Does an EAC System Work?
In its simplest form, an EAC system consists
of an electronic door lock, a reader (such as
a card reader), and some form of electronic
controller. Almost ever yone has had the
experience of being “buzzed in” to a controlled
area. The process goes something like this: after
recognising your face, a receptionist presses a
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button and you hear a buzzing sound telling
you that the door is now open. This experience
can help you get a mental picture of the inner
workings of an EAC system. A basic EAC
system consists of a reader, a controller, and an
electric lock.
More about readers
Readers are mounted on the outside of
doors, and are the only part of the EAC
system most people see. In a modern EAC
system, the readers are designed to recognise
codes (something you know) or credentials
(something you have). If the system uses a code
reader, you a Personal Identification Number
(PIN) into a keypad to identify yourself to the
system. With a credential reader, you would
present a card or key fob.
Keypads
Keypads are the simplest and least expensive
form of access control readers. Key pads
provide a simple method of entering your code.
However, keypads have two drawbacks: codes
can be easily shared and easily stolen. Because
of these two drawbacks, keypads should not be
used in a high-security building unless they are
combined with a credential or biometric. This
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