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Understanding CCTV Surveillance Devices

Understanding CCTV Surveillance Devices 


Closed Circuit Television, better known by its abbreviation CCTV, is a concealed or closed video system where viewing of its output (videos) is limited to a definite group of individuals. CCTV surveillance devices are available for premises with different architectural plans. They may be fitted within a single building, a group of buildings, large university campuses, corporate offices, supermarkets and malls. Monitoring of such areas is typically done for security and safety reasons.


The optical images generated by a CCTV device can be viewed as an event occurs or is recorded for ‘after-the-fact’ review either on-site or at a different location. VHS videotapes, CDs, DVDs and other tapes or computer based devices enable reviewing of the visual images recorded by CCTV. Review of pre-recorded images and sequences is also feasible with the use of telephone lines, fibre optics, the Internet and a range of other transmission methods. Such systems help to review CCTV footages remotely. The use of such systems for review depends upon the design and complexity of concerned CCTV system.


As a visual surveillance technology, CCTV was devised to simultaneously monitor a variety of environments and activities.  CCTV systems usually have a dedicated communications link between cameras in the concerned area and monitors at one or more control centres. While the older systems were made using analogue cameras and image storing machines, the modern systems use digital cameras and sophisticated storage devices. Some CCTV systems still use a combination of conventional and modern technologies.


Offering real-time or digitally recorded surveillance data CCTV set-ups effectively assist in detecting, reacting to, inspecting and providing evidence for security, safety and related incidents. Businesses and law & order personnel use advanced CCTV systems to avert security threats and incidents of theft, larceny, vandalism and corporate espionage.


Working of CCTV systems


CCTV system typically involves a linked set-up of cameras, the output of which can be viewed and operated from a series of control rooms and/or a central point of operation.


These cameras are available in multiple configurations, but may be categorised under two general groups: stationary and moving.


Stationary cameras are pointed at a particular scene of interest, such as an entry door or corridor, and broadcast that one scene to the control site all the time. Security personnel may adjust stationary cameras as per specific lighting conditions of that scene.

Stationary cameras can be completely exposed, or hidden within any kind of enclosure designed to meet the specific requirements of that site.


Moving cameras, generally referred to as PTZ (Pan, Tilt, Zoom) permit the system operator to change the position of the device by a remote control. This helps to focus and follow a particular object of interest more closely. This is typically done by use of a joystick in the control centre offering sideways (pan), upside and downside (tilt) and zoom in and zoom out control.


PTZ devices can also be manipulated to mechanically focus on areas of interest, such as when a door opens up or when movement is sensed


Since the camera can be aimed at scenes with varying lighting situations, these cameras characteristically have many programmed adjustments, such as auto focus and auto iris to keep the image optimized for accurate viewing.


Other sophisticated CCTV systems incorporate technologies with features such as multiple recording of many cameras, in different locations. At times CCTV is also employed to capture images for a facial recognition biometric system.


Located in Melbourne, Computer Cabling Services offers safe, secure and cost effective CCTV installations at residential as well as commercial premises across North, South, East and West Melbourne.


To know more about CCTV installation services in Melbourne suburbs or for a free quote, Call Computer Cabling Services on 03 9874 2166 or send your enquiry to

Electrical Refurbishment in a Commercial Premise

Electrical Refurbishment in a Commercial Premise – Electrical Installation Technician Melbourne


The reliability and efficiency of electrical systems is significant for any business organisation. Quality of lighting, air conditioning, computer data cables and other electrical systems must be optimum not only for the comfort of employees but also for overall safety of the premise. A minor glitch in the electrical system can result in a major mishap for commercial facilities. In an environment where protection against corporate espionage, data theft, larceny and vandalism is critical, businesses also need advanced CCTV devices, fire alarms and access controlled systems. Timely replacement is essential if such electrical devices get redundant or damaged.


It is prudent to invest in electrical refurbishment when you want your business or industrial premise to be optimised by the best of technology driven systems. Carefully installed electrical infrastructure including communication and networking systems, does contribute to business productivity. For entrepreneurs who manage retail outlets, shops and supermarket stores investment in appropriate electrical systems is a factor that contributes to more footfalls. Escalators, CCTV surveillance systems, security alarms, cash registers and other electrically operated devices also need to function smoothly at such business facilities. Electrical refurbishment at the current premise or the refurbishment of electrical set ups at a new property after relocation gives business owners a chance to use up to date and safer systems.


Electrical refurbishment works typically encompass but are not limited to:


  • Reinstallation of power outlets
  • Electrical rewiring
  • Installation of general, emergency and exit lighting
  • Data cable works
  • Computer power and surge protection
  • Cabling of telephone systems
  • Signage works
  • Air conditioning works
  • Skirting Ducts and Power Channels (Floor and Wall Installation)
  • Power Skirting
  • Under-carpet Power
  • Cable Management Solutions



Electrical refurbishment in a commercial facility is far more complicated than electrical works at a residential property. With multifaceted systems for communication, networking and security at a business premise, set up for earthing, switchboards, fuses, circuit breakers and surge protection devices calls for intricate meticulous plans and schematic configuration. Patch ups and repairs of any old or damaged wiring and switchgear must receive adequate attention. However, an electrical refurbishment is not plainly about the replacing of existing systems with new and/or more advanced models. The site may need additional safety devices and peripheral or supplementary electrical equipment. At the same time the business owners need to ensure that all works are in compliance with regulations and standards for electrical systems in a commercial facility.


Testing is another critical part of electrical refurbishment. This must be done by licensed and certified electricians – they need to perform all tests to ensure that the system is truly fool proof and performs efficiently for years to come.


Proper instructions and a comprehensive plan for all requirements must be given to the electrical contractors before the commencement of electrical refurbishment at a premise. If lighting or telecommunication systems need any major changes, these must be stated explicitly in the plan. The outdoor areas deserve no less attention. Lighting and security devices in the parking area and lawns can also be revamped during electrical refurbishment.


Located in Melbourne, Computer Cabling Services offers safe, secure and cost effective electrical refurbishments for residential as well as commercial premises across North, South, East and West Melbourne.


For any kind of electrical services in Melbourne suburbs, Call Computer Cabling Services on 03 9874 2166 or enquire at