Wifi





Johannesburg Technologies specializes in wifi 

and wireless solutions.


Wifi is basically technology to replace wires. The possibilities are endless! It could be WiMAX - to connect long distances or offices together.
Wifi - usually in buildings or complexes or even bluetooth - used for close range components such as laptops, cell phone handhelds, GPS devices, mp3 players or headsets, electronic devices, communicating and sending data to each other with no wires to restrict them, makes great things possible! No two opinions can be framed about the superiority and popularity of wireless networking and surveillance cameras in comparison to the wired equipment and cameras in the market. Each are different and have their own disadvantages and advantages. Basic advantages that have created such preference for the devices are as follows.
  • No wires causing inconvenience. 
  • Effectiveness of wireless devices or cameras is usually as good as any of the wired devices, plus no compromise in this regard when choosing wifi over cable.
  • Installation of wireless devices and security cameras is more convenient and also more attractive. It can be installed in a discreet manner not possible when using wired devices and cameras.
  • It is much easier accommodating devices without wires in comparison to wired ones. 
  • Wireless devices ensure space economy for the user that is essential in the modern environment. 
  • Wireless security devices have easy portability and can be moved to other locations without any problems. This is one area where the wired system has clear disadvantage as any shifting requires more effort and expenses.
  • Wireless cameras can also be used as temporary measure where no permanent monitoring is required. For instance; one can set them up in the swimming pool during the summer and they can be conveniently replaced in the winter. Wired cameras are difficult to move once installed and are usually set up where permanent installations are required. Another example is construction sites where no permanent monitoring is required.
  • Wireless Security Cameras can be easily concealed.
Available in a wide variety of sizes, types, and prices, wireless devices and cameras could be extremely convenient as they can be small and can remain concealed very effectively.
Unnoticed, they can monitor drive ways, entrances, shopping locations, parking lots, and various other locations.Regardless of the type, and model of the device, a wireless camera is one of the most effective items to meet specific security requirements.
The key components of every Closed Circuit Television (CCTV) system are: single or multiple cameras, recording device and a monitor.
Closed Circuit Television (CCTV) systems are broadly divided into two known types, namely: wired CCTV systems and wireless CCTV systems.
Wired CCTV systems bind all three key components of a CCTV system with cables while a wireless CCTV system comprises of a wireless camera that need not be connected to the recording device and monitor.
Both of these systems have distinct advantages and disadvantages associated as different types of technology are employed to provide security and reliable monitoring.
Wireless CCTV systems are increasingly becoming a popular choice among CCTV buyers on account of the ease of installing such a system, lack of cabling requirements and assured mobility. The newer wireless technology is also allowing manufacturers and installers to reach new frontiers in surveillance.

The key advantages are:
  • Wireless cameras can be moved to other locations requiring observation while it is difficult to move a wired camera.
  • Best suited for locations requiring temporary observation or in a temporary location.
  • Wireless cameras can be hidden to detect theft or pilferage.
  • Wireless recording and monitoring devices need not be in the same line of sight allowing observation of any place from another remote location.
  • Wireless systems are cost effective, re-deployable and portable.
At the same time, there are some disadvantages of wireless CCTV systems:
  • Wireless systems require a dedicated frequency to transmit signals from the camera to the receiving and recording station.
  • Frequencies may be subject to various interruptions by use of electric motored products, air conditioning, fluorescent lighting or cordless telephones which affect the picture quality.
  • Wireless camera may not provide the best picture quality as such systems are susceptible to picture distortion, while wired cameras provide relatively better picture quality.
  • Wireless CCTV cameras may need electric power, which implies a wire runs through the camera though the video connection is wireless.
  • Wireless systems require wireless technology-specific expertise to diagnose and fix break downs in the system.
Wired CCTV Systems Wired CCTV systems connect the camera to the recording device and monitor with the help of standard coaxial cables or Unshielded Twisted Pair (UTP) cables or fiber optic cables.
The key advantages of wired CCTV systems are:
  • Provides the best picture quality with zero interference.
  • The camera can be located hundreds of meters away from the recording or monitoring equipment.
  • All sensors can be run from a single power supply.
The key disadvantages are:
  • Cabling and installing can be a tedious task, requiring help from experts.
  • Observation is fixed to a specific area and the camera cannot be easily moved to another location.
Overall, wireless cameras are relatively more expensive than traditional wired cameras.
Wireless CCTV systems are a preferred choice in specific locations devoid of easy cabling facilities and for individuals requiring an easy-to-install solution that might need mobility.
The wired CCTV system is a preferred choice when good picture quality and economy considerations gain precedence, usually in permanent long term installations.

Speak to Jozitech about your requirements and needs.
We can assess your capabilities and environment to advise on what is best for you.
An example:

This kit can monitor movement, listen to sound, switch on TV or recorder automatically.
We see the benefit of wireless units to monitor places far away from a house or building or if you want to move around monitoring locations. 
Very good for construction sites. Also in such practices as guarding valuables or monitoring a baby or small children.
Wireless units have some advantages over wired units when it comes to mobility and installation time is slightly faster. 
The negative aspect is whether you can drive 4 cameras from one base station, which then depends on the physical layout of your home or business. Very often you are limited to 3 or 2 units because of interference or other factors. 
No 2 installations are alike.
Another item to watch is with Wireless.  You can have up to 4 cameras monitoring, but only one camera can be used if you want to do high bandwidth tasks such as motion detection. Thus the best role for Wireless products is for where you cannot place a cable easily, or where you want only to use visual monitoring on most cameras and no motion detection or when you want to move around your motion detection camera frequently.