Technology & Trends - Analogue Transmission

Casino security - HD IP cameras offer better video surveillance capabilities

Large busy casinos must maintain continuous surveillance of multiple tables and machines High-definition (HD) cameras are a perfect fit for the casino market. HD security cameras provide six times the resolution of analogue cameras, supplying images with sharper edges that easily identify faces, cards, dice, chips, currency, and fill slips. In addition, high-definition IP cameras can reduce camera count. A single, 1080p camera can effectively cover poker, roulette or craps tab...

Networking basics for security professionals: Understanding the role of midspans to supply power

Just as with network switches, there are no real standards for midspans In general terms, a midspan is a power over Ethernet (PoE) power source that is placed between a network switch and the device being powered, hence the term midspan. The real question is, with almost all network switches providing PoE power, why do we need a midspan? The answer is, in some cases we don’t, but in others we do. As with any other product we have discussed, we need to first consider that...

Networking basics for security professionals: What do layers really mean?

Layering as applied to computers is a made up term having no relationship to any particular standards When it comes to setting the criteria for network switching, we often hear “I only want a layer 3 switch.” We naturally assume that since the number 3 is bigger than the number 2, a layer 3 switch must be better than a layer 2 switch. It may surprise you, but when it comes to video security applications, this may not be the case. In fact, just the opposite may...

Networking basics for security professionals: Misinterpreting product specs – temperature, latency and more

Too often a valid assumption turns out to be the opposite in practical operation It’s easy to misinterpret product specifications of IP video transmission products to the detriment of system functionality. We have seen how this problem relates to port speed, power over Ethernet (PoE) and transmission media. Now let’s look at some additional aspects of product specifications – and how they can be misinterpreted. Importance Of Temperature Rating What about te...

Networking basics for security professionals: Considering 4k’s impact on networks

Since last year there has been a lot of talk with regard IP security cameras with 4K resolution. As with any advancement in video security, this too has come about due to advances in consumer electronics. While being the “latest and greatest,” it still raises questions as to actual, practical everyday usage. What Is 4K Resolution? Let’s start by defining 4K. Back in the day we had HDTV, which in some cases was defined in terms of its resolution of 1920 hor...

Networking basics for security professionals: How does PoE work?

The action of a voltage applied to a resistance element, draws power from the switch’s PoE port We often think about a power supply operating in a single format. A power source provides power to a device. You plug it into a wall outlet and that’s all that happens. PoE power is a far more complex. There is interaction between the source providing power and the device receiving power. This interaction is governed under the 802.3 AF and AT standards. These differences...

Networking basics for security professionals: Transmission limitations

Transmission of video and PoE power for IP security cameras over infrastructures can be confusing. Network infrastructures are designed using twisted pair cabling that we refer to as CAT (short for Category) cable, also referred to as UTP (Unshielded Twisted Pair). Security systems, coming from an analogue environment, have historically transmitted over coax cable, and with the use adaptors can transmit over CAT cabling, which can be further broken down into single pair twist...

US electric grid: Impact of catastrophic events

The number-one cause of most power outages in the U.S. is bad weather What does the industry consider to be its most severe threats the U.S. electric grid? There is no shortage of nightmare scenarios. According to the Department of Energy, the number-one cause of most power outages in the U.S. is bad weather, which costs the economy between $18 billion and $33 billion every year in lost output and wages, spoiled inventory, delayed production and damage to grid infrastructure....

Networking basics for security professionals: Network switch bandwidth limitations

Any part of a transmission infrastructure has a dramatic impact on system performance We often view network switches as transparent transmission products. What goes in comes out. In reality, nothing is further from the truth. In this article, Neil Heller - Vice President, Vigitron, Inc. highlights that any part of a transmission infrastructure has a dramatic impact on transmission and, therefore, on system performance. At the very least a network switch can be viewed as a piec...

Virtual machines in the world of Video Management Systems

The solutions offered today in the field of server virtualisation seem to be a natural fit for the evolution of security systems from analogue to IP The video surveillance industry has been transitioning from analogue to IP-based systems over the last several years, and it is clear that this trend will continue. In light of this, it is apparent that taking advantage of the advancements in the IT world for use in security system design is the next logical step. In this article,...

Networking Basics for Security Professionals: Bandwidth challenges can impact your video surveillance system

Too often we make the assumption that networks designed for data communication are the same as those for IP video Networking Basics for Security Professionals: Bandwidth challenges can impact your video surveillance systemToo often as we continue on the transition from analogue to IP video surveillance, we make the assumption that networks designed for data communication are the same as those for IP video. In fact, they are very different. While we focus on camera, NVR an...

Debunking megapixel camera cost myths

End users should consider the cost of anentire surveillance system rather than the cost of a single megapixel camera There is a misconception in the security industry that megapixel cameras are more expensive than conventional surveillance cameras. However, to understand real value, it's important to focus not on the price of a single camera but on the overall surveillance system cost. Looking at the cost holistically and contrasting it with the benefits will clearly demonstra...