SECURITY OVER IP
would wish to have remote access to the live or recorded video? Will the surveillance system be
used for purposes other than security, e.g. health & safety compliance or management information, footfall management, parking control, etc? Will the surveillance system be
expected to interact with other security systems, e.g. access control? Except when there is an incident
which needs to be more closely observed, do you wish to be able to capture very high resolution recognition or even identification grade images of all activity in the field of view of the cameras, or will image quality, which enables an operator to just verify that an incident is taking place, be sufficient. Will you want to store recorded
video for one week, one month, or even longer? To avoid the risk of video evidence
IP based surveillance systems give users the benefit of the latest generation of HD cameras.
by analogue cabling, the full benefits of the technology built-into the cameras is best achieved within an IP based system. The much higher recording requirements of these impressive cameras needs however to be taken into consideration at the system design stage.
ROI In a tough economic environment, it is not surprising that businesses are looking for a maximum return on their investment in a video surveillance system. Fortunately, technology has come to the rescue and end-users can now take advantage of cameras and recorders which offer a level of performance and value which would not have been imaginable just a few years ago. However, a major investment in a surveillance system is not something that clients will wish to repeat on a regular basis. They will therefore want to purchase a solution that is not just fit for today’s purposes but also is future proof in terms of its expandability and its ability to integrate with new technology which may become available in the future.
32 NETCOMMS europe Volume III Issue 3 2013
as a result of equipment failure e.g. a hard drive, do you need to specify the provision of back-up video storage i.e. in the form of RAID devices. What is the bandwidth capacity of
When and Why The most common question which I and my colleagues are regularly asked is, “What is the break-even point where the number of cameras to be installed makes it cost effective to consider an IP/ network solution instead of a system which is connected by a conventional analogue infrastructure?” Some people quote this as 20 cameras, some at 30, but there is in fact no simple answer to this question as there are so many factors which have to be taken into consideration, many of which will be affected by your operational requirements. The following are some of the
questions which the system designer needs to address before a decision can be made as to whether or not to go for an IP/network based system. Do you intend to have one or more
operators watching the live video around the clock, and if so, will all the operators be located in a single control room? Other than security personnel located
in your control room, do you have other colleagues who if authorised to do so,
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your existing network? Is you network manager comfortable
with your video surveillance system sitting on your company’s network.
Conclusion When you have the answers to these questions and perhaps some others which are specific to your organisation, your system designer should be able to make some recommendations on how your system should be structured to match your requirements. They should of course take on board the advice of your chosen installer or system integrator. Some manufacturers offer a free system design service and whilst these manufacturers will quite rightly want to promote their own products, in the main you should be able to expect a high degree of objectivity when it comes to providing advice on the design of the system’s architecture.
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