02
September

What Are Uninterruptible Power Supplies?

A Power Supply That Isn’t Interruptible (UPS). When purchasing a computer, it is one of the most significant purchases you can make. It not only safeguards your hardware investment, but it also eliminates data loss, boosting user productivity.

Uninterruptible Power Supply for Server

When it comes to a business, it is not just UPS for a computer. Rather, it is UPS for the entire server, or rows of servers! It’s a reality of life that Mother Nature will have her moments. When the electrical current to your device is not constant, it can cause serious problems with your computers and home entertainment systems. Blackouts, brownouts, noise, spikes, and power surges are all common voltage problems.

Purchasing a UPS

Let’s establish what an Uninterruptible Power Supply in Singapore is and how it works before we identify the concerns linked to voltage irregularity. A UPS is a device that delivers reliable backup power in the event of a power outage. By regulating the power coming through, the UPS can protect both data and the computer equipment linked to it. A UPS is available in a variety of sizes and models to suit various types of equipment. The UPS, surge suppressor, and SPS are only a few of them. Knowing which one to use is critical for the safety of the equipment you’re using.

Different Kinds of Power Issues

A UPS, as previously stated, safeguards against common electrical current problems.

Blackout

Often known as a “power cut,” can occur when a transformer is broken or when a power line is downed. When instances like this arise, software advancements have increased with time. If you used earlier versions of Windows 95 or 98, you may recall that when you turned on your computer after a power outage, it ran a diagnostic test. Windows now recovers from events more easily thanks to the introduction of Windows NT and its journaling file system.

Brownout

This occurs when electrical circuits are overloaded. When a lot of electrical equipment is connected and in use at the same time, a brownout can occur, resulting in a power outage. The problem normally only lasts a few minutes, but it can harm your device.

Overloaded Circuit

Noise

Commonly caused by interference from lightning and generators; resulting in unclean power going to your devices. It can cause the operating system and applications to malfunction and possibly corrupt files.

Spike

An abrupt spike in voltage that lasts only a few seconds. Lightning or the restoration of power after a major outage are two common explanations. When this happens, I usually unplug all of my electrical appliances. When the power comes back on, I wait a few minutes for the voltage to recover to normal before reconnecting the equipment. If there will be a planned outage for maintenance, several power companies will tell you.

A power surge occurs when a domestic equipment, such as a refrigerator or air conditioner, causes a significant spike in voltage. Surges are only present for a brief period of time, yet they can cause considerable damage to computer components.

What Happens If Your Equipment Isn’t Protected?

You’ll notice that a lightning storm is frequently the highest threat to your equipment in the descriptions of these different voltage disruptions. What precisely does lightning do to your equipment that makes it dangerous? When lightning strikes a transformer, it can cause a tremendous surge that runs through the wiring to your home in an instant. The surge travels from the outlet or data wires to your PC. The motherboard is frequently the first component to fail in a computer. This effect can also cause a cascade of additional voltage problems, resulting in damage to other components in your computer, such as the hard drive and RAM.

Lightning Strike in Singapore

Selecting the Best Protection

When it comes to protecting your equipment, there is no one-size-fits-all kind of uninterruptible power supply solution. There are numerous solutions on the market that cater to various situations, such as a house, an office, or a huge data center. Here’s a rundown of what to look for when buying a home UPS.

  • Surge suppression that filters out faulty electricity that could damage equipment in its entirety.
  • To check that your equipment is properly grounded, use a site wiring fault indicator.
  • Data corruption is prevented through noise filtration.
  • In the event of a power loss, the backup power is available immediately.
  • Up to eight outlets for various equipment are supported. I always keep two computers on; some UPS equipment includes a battery backup in addition to surge protection, while others only have surge protection. In situations like this, I’ll just connect the UPS’s battery ports to the most critical devices.
  • Other devices, such as a network, serial port, and data connections, should be protected by your UPS.
  • A battery replacement indicator, battery management, and intelligent features such as automated save and shutdown are all things to look for. This feature may only be accessible on more expensive models.
  • Because a UPS is such a large investment, make sure it comes with a lifetime warranty. I’ve had a UPS since 2005, and when the battery expired a few years ago, I was able to purchase a replacement for a fraction of the price of buying a new one.

Home computing has progressed throughout time, and some customers now own a home server as well as other devices such as a Network Attached Storage (NAS) device. Investing in a UPS for such arrangements will necessitate further investigation into your specific requirements. The most obvious is the requirement for a more powerful UPS capable of meeting the demands.

A media server functions in the same way as a file server in an office. They’re always saving, retrieving, or processing data, such as streaming to your smart TV or mobile devices. If a power outage happens, such situations can result in catastrophic data loss. For such setups, you should first consider purchasing a UPS that has capabilities like battery replacement, hot battery swapping, and intelligent battery functions. Integration with your backup software is another feature of the UPS you should consider.

Power Management and Unattended Shutdown

A UPS will protect your equipment from damage, but knowing when such incidents will occur is usually beyond your control. You might return to your home office too late to fully shut down your PC after a quick trip to the kitchen to cook a sandwich. Data loss can be avoided by having the ability to gracefully shut down. These functions are frequently included in the software that comes with your UPS. When making your purchase, make sure to look for the following features:

  • Shutdown by itself
  • Notification of a power outage to the user
  • Shutdown commands that can be customized
  • Mode of conservation.
  • Replacement of the battery is required.
  • Status display, runtime, event log, and remote management through the web or a remote computer are some of the management features available.
  • Temperature and humidity in the environment

How to Use Your UPS Backup Correctly

It’s critical to get the most out of your UPS. I’ll admit that I’ve been a little naive about this at times. Some users may feel that having a UPS means that the fun never ends, that you may keep playing, listening to music, or simply leave the computer on standby. No way. What you should do is take advantage of the chance to gently shut down the equipment. Some UPS devices can offer backup power for up to one hour. Use this time to turn off and unplug all of your gadgets.

An uninterruptible power supply (UPS) is not a guardian angel for all gadgets. A printer is one equipment that should never be plugged into a UPS. This may cause the printer motor to overheat. Any jobs that need to be printed will be queued by a printer. It usually resumes printing after the power is restored. A basic surge protector should suffice.

Computing equipment is a significant investment, therefore safeguarding it should be a primary priority. A UPS, thankfully, can assist protect your equipment from both man-made and natural disasters.

Surge Protectors: What Are They?

At the very least, a surge protector should be connected to your computer and home entertainment equipment. Surge protectors do not supply backup power, but they do safeguard your equipment from damage.

If you wish to know more about uninterruptible power supply for your business, contact Comnet to find out more!

16
August

The Complete Guide to Uninterruptible Power Supply (UPS)

What is a UPS power supply?

UPS is an uninterruptible control supply in Singapore designed to be used as an auxiliary control source to successfully and instantly switch battery boosters for computers and other memory-based devices as needed. Personal computers, also known as PCs, are packed with important but damaged computer components that are often unable to cope with damage caused by sudden loss of control. The quality plan of the uninterrupted control supply system is used to protect them and protect information in the event of power outages, network surges, and any disappointment or atypical control situations. In this article, we’ll be sharing information about UPS right from the horses’ mouth – a professional and competent uninterruptible power supply company in Singapore – Comnet Systems!

Uninterruptible Power Supplies model

As additional peripherals in the configuration of home and work PCs, servers and arrays, and other computer hardware applications, UPS units are becoming increasingly popular. In this case, the uninterruptible power supplies provide computer customers with additional peace of mind and an additional level of information and equipment security.

In this UPS battery system guide, we will examine exactly the functions of UPS and how they can help protect expensive and sophisticated high-end computer components from the potentially damaging effects of sudden main power failures, power surges, and other causes. Shut down unexpectedly. We will also explore more different types of UPS power supplies on the market today to help you decide which types to focus on when purchasing UPS.

A quick side note on naming conventions: In the technical hardware context, the acronym UPS stands for Uninterruptible Power Supply. Technically speaking, the “UPS power supply” is a convenient example of the RAS syndrome and a PIN code and an LCD screen. However, it is still a very common term among customers and suppliers, and the purpose of this guide is that we will use both stand-alone acronyms and the longer version of the interchangeable.

What is a UPS battery?

Uninterruptible power supplies are typically located between the powered main wall sockets and the computer, and are connected via separate cables. The average home or office UPS battery backup, depending on the intended usage characteristics and overall power capacity, is a relatively small and compact smart device, typically built around a high drain charging power cell. Traditionally, this is a lead-acid battery (VRLA) battery in most cases, but with the continued development of lithium-ion technology, Liion cells are now increasingly popular at the heart of modern UPS systems.

Uninterruptible Power Supply Singapore mesh

VRLA or lead-acid batteries often require fairly low maintenance and are generally considered to be the basic and reliable workhorse of Uninterruptible Power Supplies, with a typical service life of 5 years. The “VR” in VRLA stands for valve control, which means that some VRLA batteries have a built-in ventilation system that can operate automatically to control the release of gas that accumulates at certain points in the battery charge and discharge cycle. This important function is triggered by an internal pressure sensor. Like most aspects of the VRLA type, it works best when the battery is kept in a dry, temperature-controlled environment, such as a common central heating room in a home or office

In contrast, UPS Li-ion batteries are generally more compact and lightweight, and can have a number of built-in power management features, such as early charging and voltage balancing to get started. Many brands also provide a longer life than lead-acid batteries. In general, which means that in sufficient time, they can eventually provide similar inexpensive options. However, in the initial stage, UPS devices equipped with lithium batteries tended to be more expensive, reflecting a significant increase in production costs. For VRLA-based devices, the initial purchase is usually cheaper.

There is a third option for UPS batteries, namely “wet or flooded batteries” or VLA types. These are much less useful as options that can be bought on the street or in standard UPS systems because they are suitable for very specific applications and environments. On the one hand, their chemical makeup means that they are dangerous unless kept in a completely separate battery storage safe, and they also require regular maintenance by the user to supplement the level of distilled water and continuously monitor their balance and calibration data. This will make VLA batteries completely impractical for most home users or even most office environments. Wet batteries can provide obvious benefits in certain specific use cases, such as large server centers. In these use cases, excellent long-term reliability and stability is the key requirement or fact superior to convenience.

In addition to the battery and the case itself, the UPS power supply often includes a number of other useful functions, which are highly dependent on the device model. The elements that are included:

  • Advanced on board performance monitoring software
  • Management card slots and other data reading functionality
  • Deep discharge, power surge, low voltage and/or  temperature protection
  • LCD or OLED display screens and readout panels
  • Graphical calibration interfaces
  • A broad range of connectivity and external hard Input/output expander options
  • Variable numbers of power sockets and outlets
  • ‘Hot swappable’ battery replacement and/or live UPS maintenance options
  • Various IP ratings

What does a UPS do, and how does it work?

Uninterruptible Power Supply company in Singapore model

As noted in the introduction to this guide, the primary function of the UPS is, first and foremost, to provide a constant and temporary power source for computer setup or other important hardware fixes – in this case, a power outage or similar power outage. Most importantly, UPS is not intended to provide long-term backup use for connected equipment when there is no power supply. The UPS device is not designed to provide a battery-powered solution to continue working “off the grid” or surfing the Internet.

In the case of a sudden disconnection of the normal power supply, the goal of the UPS unit is to provide a limited time window in which the user can still perform a controlled shutdown of the related equipment. The response grid is no longer available. We will study exactly how it works in a later part. An extremely simplified version is that the UPS’s power source collects and stores some energy drawn from the wall socket and stores it in its built-in battery, and then sends the rest of the energy to the computer normally.

When the current from the main plug suddenly stops due to any reason, usually in the case of a power failure, it is also due to accidental disconnection of the cable. The UPS can immediately switch to sending backup power stored in its internal battery.

Hardware damage vs data loss

The point of all this is that if for some reason the main power circuit is suddenly disconnected, the UPS can protect vulnerable and expensive hardware components from damage to memory and physical infrastructure. Arguably most importantly, installing a UPS device also means that important data will not be lost or damaged due to a total power outage during transmission.

For most daily PC activities, the risk of permanent data loss or errors in the event of an unexpected process interruption is actually quite high, so there is usually an approved shutdown procedure for almost all types of activities. data transmission. It’s as easy as removing a USB memory stick from a laptop, you must click eject to safely remove it.

Conversely, if you simply remove the peripheral device from its slot at the moment when the last photo or document appears to have been successfully transferred, the PC may not have finished writing all the data required to make it fully readable by both parties. In the future. In the worst case, this may cause the device to be unable to read the file at both ends of the transfer process. Data damaged or damaged in this way can sometimes still be rescued by specialized recovery technicians, unless they cannot repair or restore it, otherwise it will be lost forever.

This is one of the key reasons to always keep a backup of your important files. It only applies to your data, which is generally saved in a format designed to move as you wish. Rather, each time the computer is turned on and running, a more thorough background transfer process will continue to occur at the hardware and operating system levels. Many of these are the absolute key to the operational capabilities of the machine. In the event of a sudden power failure, it is the disruption of these core processes. Even a simple desktop computer can cause irreversible damage. This is the purpose of the UPS power.

Types of UPS power supply

As we mentioned earlier in this guide, there are many different types of UPS systems on the market today. No matter which model or brand you ultimately choose, you will find that it provides a wide range of different features and settings, from numerous connection interfaces to built-in displays, software management packages, and more.

However, these additional features should not be confused with the important issue of choosing the correct UPS core type. Fortunately, the choice basically boils down to a few key variants. In this section, we will discuss each major type one by one and try to determine the UPS power supply that best suits your hardware configuration and operating requirements.

Online UPS

An online UPS system can be considered the best choice for most usage scenarios-it is usually the most expensive type of UPS power supply, providing the best security against unexpected power fluctuations or sudden power failures. As you might expect, the term “online UPS” has nothing to do with Internet connections. On the contrary, it is a fully online UPS power supply, known as a “true UPS”, which means that it can continuously filter, store, and deliver current to your PC even when all conditions are normal.

In short, online UPS is always performing its designed tasks, rather than performing operations only when necessary, which of course means that in the event of a sudden power failure, as far as the computer is concerned, there is a real zero interruption worry, cleanliness, stable power supply continues, as if nothing happened. Although from a hardware or data point of view, this provides the most seamless and secure option to date for the protection of computers and their components, it also means that the power consumption and operating costs of this type of unit UPS are very high. Not to mention the significantly higher cost of the technology itself.

This can be of considerable value in certain key functions and environments where any performance or data loss will be catastrophic, but for most home users this can be considered excessive. In other words, while online UPS systems used to be extremely expensive investments for high-end business networks only, in recent years they have become more important for enthusiastic home users who want the most comprehensive protection for their systems and files.

Offline/standby UPS

Compared to the version described above, the offline or backup UPS is exactly what you imagine from the name. It is not constantly cycling, storing and converting power to a computer or server, but is “idle” until absolutely necessary. In fact, whenever the backup UPS detects that the current in the wall outlet is normal, it will effectively bypass itself. By the time the issue is detected, for most premium models and brands, typically within 5 milliseconds, the offline UPS power will switch to its internal backup battery.

Although these 5 milliseconds are typically within the tolerance of most consumer and home electronics products, it still counts as a very minor “outage”. This is the reason why professional users do not technically consider offline models as “real” UPS devices. However, for most home desktop PC users, they are often full-featured alternatives and are only considered unsuitable for very critical applications, where any risk of data or hardware loss is unacceptable.

Hybrid/line-interactive UPS

Based on the above definitions, you will find that hybrid UPS systems generally include so-called “online interactive” UPS units, which provide some kind of compromise and an effective balance between cost and performance, which is not surprising. The online UPS supplies power continuously through its battery cycle, while the backup UPS system only switches to battery power when a problem is detected, while the hybrid or line-interactive UPS power supply provides various operating modes. These typically include double conversion mode, economy mode and active filter mode; the hybrid UPS can detect the most suitable mode at any time. This method is achieved through a variable power transformer system, which means that the total power consumption during any typical extended use period is much less than the full online equivalent.

In addition, the interactive UPS is more effective than the offline version in monitoring, managing and adjusting changes in traffic in the event of “power outages” that are more common than complete power outages. Hybrid mode will not have to constantly switch between full or battery power, which means that the long-term health of the battery is greatly increased and further reinforces the overall value proposition of the online interactive UPS.

Which UPS should you buy?

Find the right model, brand, and the size or capacity of  the UPS for your needs. There are a few key factors to take into consideration. Regardless of whether you have opted for an online, staby or the hybrid type UPS power supply. These are the main points:

  1. The type of circuit protection you need
    • Blackout protection
    • Brownout protection
    • Surge protection
    • Over-voltage protection
    • Under-voltage protection
    • Deep discharge protection
    • Harmonic distortion protection
    • Frequency variation protection

  2. The amount of UPS power needed
    • How many devices are you going to use?
    • What is the combined total power draw?

  3. How long you need to be able to run those devices for the event of a black out
    • Runtime of a UPS will depend on the size of its battery
    • How many devices that the battery is being asked to support
    • You need to find the bare minimum amount of time you would need to access your computers (finish or stop and save any active processes and shut down it properly)

When purchasing a UPS system, other factors to consider are generally not as important as the factors listed above, but can still affect your purchasing decision. Include the appearance of the device, the overall physical size and shape, and where your home or office would be located for optimal access and security.

20
May

CCTV System

Security Camera Range: Factors to Consider 

Having your security cameras in the right place is just as important as having them. If your cameras are in the wrong place, you may lose out on getting evidence of important events. When you are determining camera placement, you should think about how far they will be able to see. Placing them too far from the area of interest will prevent you from capturing clear footage, but you will not be able to cover a lot of area if you place them too close. A typical home security camera can see within a range of 0-70 feet, but there are other factors that can affect this range. In this post, we will go over some things that affect security camera range so that you can figure out the optimal placement.

Factors That Affect Security Camera Range

Focal Length & Field of View

Focal length refers to the size of the security camera lens and this affects your camera’s field of view. Field of view and range are often confused with each other, but range is how far a camera can see while field of view is how much, or how wide, it can see. A smaller focal length will cause a wider field of view, but objects will appear smaller and more distant from the camera. So, you will be able to capture more, but what is captured will be less detailed and fuzzy. A bigger focal length will cause a narrower field of view, but objects will look bigger and closer to the camera.

Resolution

A wider field of view does allow you to see more things, but it sacrifices image quality. That is why resolution is another deciding factor in the range of your security camera. Resolution refers to how many pixels make up your image. The higher the resolution, the more pixels that are in an image. More pixels means that your images will be clearer and more detailed. A low-resolution camera will produce images that appear blurry or pixelated. Having a higher resolution means that you will be able to see more details, even if the object is far away.

Location & Distance

This one seems obvious, but where you place your security cameras will affect their range. The further away you place your camera from the area of interest, the harder it will be to capture details. Additionally, you want to make sure that nothing is blocking the camera’s line of sight. If there is any obstructions, like a tree or wall, the camera won’t really be monitoring anything of interest. But besides that, obstructions will make a wireless camera’s signal strength weaker and affect the image quality.

Benefits of IP Over Analog CCTV Systems 

There are two different types of CCTV systems: IP and analog. Even though analog systems are older, advances in technology have greatly improved their performance over the years. Now, you can get high-quality analog systems for about the same price as IP systems. But despite the improvements, there are still areas where IP prevails over analog CCTV systems.

Difference Between IP and Analog

It is a common misconception that the difference between IP and analog systems is that IP systems are connected to the internet while analog systems are not. This results in a lot of people falsely claiming that analog systems are not capable of remote access since they are not connected to a network. While it is true that IP systems depend on a network connection, newer analog systems can be connected to the internet for remote access as well.

The real difference between these two CCTV systems is the way data is converted and transferred. Analog systems depend on the DVR to convert the video signals into digital video. With IP systems, the IP camera has an internal sensor that already records images in digital video, so a DVR is not needed. Additionally, the data transmission is done through the network instead of over coaxial cables.

Using IP Over Analog CCTV Systems PoE

One special advantage of using IP over analog CCTV systems is their ability to use PoE (Power over Ethernet). With analog systems, each camera needs to have 2 different cables that are connected to 2 separate things. 1 cable is a coaxial cable that is connected to the DVR for data transmission while the other is a power cable that is connected to a power supply to send power to the camera. IP cameras have the option of using PoE. This means that each camera will only need to be connected to one device via Ethernet cables that can transmit both power and data. Using PoE offers more flexibility when it comes to installation because there is less cables to handle.

Video Recorder Independence

Analog systems rely on the connected DVR to convert the video signals into digital video and for storage. IP cameras can be connected to a video recorder called an NVR, but the sole purpose of the NVR is to just store footage, not to convert signals. All the digitization occurs on the IP camera before the data even reaches the NVR. Unlike analog cameras, IP cameras are independent from the video recorder so they can work by themselves. Using IP over analog CCTV systems means more options when it comes to storage. If the user does not want to use an on-site NVR, then the IP camera can send digitized footage directly to the internet instead.

Video Analytics

Another important advantage of using IP over analog CCTV systems is that they can support intelligent video analytics. Since IP cameras already record images in digital video, it is easier for footage to be analysed and manipulated. Analog cameras can use video analytics as well, but they have more limitations; analog cameras need a separate device to convert video signals to digital which means that it is more difficult to manipulate footage without causing image distortion.

Scalability

Analog systems are simple to configure when it comes to setup, but they are limited when it comes to expansion. Analog systems require each analog camera to be directly wired to both a power supply and the DVR. This means that the number of cameras you can connect is limited by how many ports on the DVR you have. Additionally, you would have to make sure that all the devices are connected to each other and in the same vicinity, meaning less installation options. IP cameras will only need one cable if you use PoE and you have more flexibility when it comes to setting up. IP cameras can be connected to single switch with additional ports and do not need to be directly connected to an NVR.

Wrap Up

Analog systems have come a long way since they were first introduced, but there are still a lot of advantages of using IP over analog CCTV systems. IP systems can use video analytics and they offer more flexibility in terms of expansion and installation. Analog systems are still good if you want a simple setup without any fancy features but going with an IP system would be the ideal choice for those who want more out of a security system.

Quality

Another deciding factor in the range of your security camera is the quality. A camera’s specifications may be like another camera, but that does not mean that they are the same quality and will perform the same way. If you are looking for security cameras that will give you the best performance, you should aim to purchase from reputable and reliable dealers. Not only will they provide you with the highest quality products, but they will also be there to assist you on your CCTV installation every step of the way. If you are ready to get started on your new CCTV system, give us a call today, Comnet Sales Team would be happy to help you out. 

20
May

Wireless Network Solutions

Wi-Fi 6: is it Really that much faster?

Wi-Fi is about to get faster. Faster internet is constantly in demand, especially as we consume more bandwidth-demanding apps, games, and videos with our laptops and phones.

But the next generation of Wi-Fi, known as Wi-Fi 6 is not just a simple speed boost. Its impact will be more nuanced, and we are likely to see its benefits more and more over time.

This is less of a one-time speed increase and more of a future-facing upgrade designed to make sure our speeds do not grind to a halt a few years down the road.

WHAT IS WI-FI 6?

Wi-Fi 6 is the next generation of Wi-Fi. It will still do the same basic thing — connect you to the internet — just with a bunch of additional technologies to make that happen more efficiently, speeding up connections in the process.

HOW FAST IS IT?

The short but incomplete answer: 9.6 Gbps. That is up from 3.5 Gbps on Wi-Fi 5.

The real answer: both of those speeds are theoretical maximums that you are unlikely to ever reach in real-world Wi-Fi use. And even if you could reach those speeds, it is not clear that you would need them. The typical download speed in the US is just 72 Mbps, while in Singapore with the average download speed of 42.5 Mbps that would translate or less than 1 percent of the theoretical maximum speed.

But the fact that Wi-Fi 6 has a much higher theoretical speed limit than its predecessor is still important. That 9.6 Gbps does not have to go to a single computer. It can be split up across a whole network of devices. That means more potential speed for each device.

WI-FI 6 ISN’T ABOUT TOP SPEEDS

Instead of boosting the speed for individual devices, Wi-Fi 6 is all about improving the network when a bunch of devices are connected. That is an important goal, and it arrives at an important time: when Wi-Fi 5 came out, the average US household had about five Wi-Fi devices in it. Now, homes have nine Wi-Fi devices on average, and various firms have predicted we’ll hit 50 on average within several years.

Those added devices take a toll on your network. Your router can only communicate with so many devices at once, so the more gadgets demanding Wi-Fi, the more the network overall is going to slow down.

Wi-Fi 6 introduces some new technologies to help mitigate the issues that come with putting dozens of Wi-Fi devices on a single network. It lets routers communicate with more devices at once, lets routers send data to multiple devices in the same broadcast, and lets Wi-Fi devices schedule check-ins with the router. Together, those features should keep connections strong even as more and more devices start demanding data.

DEVICES ARE MORE LIKELY TO MAINTAIN FAST SPEEDS ON BUSY NETWORKS

The story starts to change as more and more devices get added onto your network. Where current routers might start to get overwhelmed by requests from a multitude of devices, Wi-Fi 6 routers are designed to more effectively keep all those devices up to date with the data they need.

Each of those devices’ speeds will not necessarily be faster than what they can reach today on a high-quality network, but they are more likely to maintain those top speeds even in busier environments. You can imagine this being useful in a home where one person is streaming Netflix, another is playing a game, someone else is video chatting, and a whole bunch of smart gadgets — a door lock, temperature sensors, light switches, and so on — are all checking in at once.

The top speeds of those devices will not necessarily be boosted, but the speeds you see in typical, daily use likely will get an upgrade.

Exactly how fast that upgrade is, though, will depend on how many devices are on your network and just how demanding those devices are.

A WI-FI 6 ROUTER IS REQUIRED

Instead, new devices will start coming with Wi-Fi 6 by default. As you replace your phone, laptop, and game consoles over the next five years, you will bring home new ones that include the latest version of Wi-Fi.

There is one thing you will have to make a point of going out and buying, though: a new router. If your router does not support Wi-Fi 6, you will not see any benefits, no matter how many Wi-Fi 6 devices you bring home. (You could see a benefit, though, connecting Wi-Fi 5 gadgets to a Wi-Fi 6 router, because the router may be capable of communicating with more devices at once.)

Again, this is not something worth rushing out and buying. But if your home is packed with Wi-Fi-connected smart devices, and things start to get sluggish in a couple years, a Wi-Fi 6 router may be able to meaningfully help.

WHAT MAKES WI-FI 6 FASTER?

There are two key technologies speeding up Wi-Fi 6 connections: MU-MIMO and OFDMA.

MU-MIMO, which stands for “multi-user, multiple input, multiple output,” is already in use in modern routers and devices, but Wi-Fi 6 upgrades it.

The technology allows a router to communicate with multiple devices at the same time, rather than broadcasting to one device, and then the next, and the next. Right now, MU-MIMO allows routers to communicate with four devices at a time. Wi-Fi 6 will allow devices to communicate with up to eight.

You can think of adding MU-MIMO connections like adding delivery trucks to a fleet, says Kevin Robinson, marketing leader for the Wi-Fi Alliance, an internationally backed tech-industry group that oversees the implementation of Wi-Fi. “You can send each of those trucks in different directions to different customers,” Robinson says. “Before, you had four trucks to fill with goods and send to four customers. With Wi-Fi 6, you now have eight trucks.”

The other new technology, OFDMA, which stands for “orthogonal frequency division multiple access,” allows one transmission to deliver data to multiple devices at once.

Extending the truck metaphor, Robinson says that OFDMA essentially allows one truck to carry goods to be delivered to multiple locations. “With OFDMA, the network can look at a truck, see ‘I’m only allocating 75 percent of that truck and this other customer is kind of on the way,’” and then fill up that remaining space with a delivery for the second customer, he says.

In practice, this is all used to get more out of every transmission that carries a Wi-Fi signal from a router to your device.

WI-FI 6 CAN ALSO IMPROVE BATTERY LIFE

Another new technology in Wi-Fi 6 allows devices to plan out communications with a router, reducing the amount of time they need to keep their antennas powered on to transmit and search for signals. That means less drain on batteries and improved battery life in turn.

This is all possible because of a feature called Target Wake Time, which lets routers schedule check-in times with devices.

It is not going to be helpful across the board, though. Your laptop needs constant internet access, so it is unlikely to make heavy use of this feature (except, perhaps, when it moves into a sleep state).

Instead, this feature is meant more for smaller, already low-power Wi-Fi devices that just need to update their status every now and then. (Think small sensors placed around a home to monitor things like leaks or smart home devices that sit unused most of the day.)

WI-FI 6 ALSO MEANS BETTER SECURITY

Current devices and routers can support WPA3, but it is optional. For a Wi-Fi 6 device to receive certification from the Wi-Fi Alliance, WPA3 is required, so most Wi-Fi 6 devices are likely to include the stronger security once the certification program launches.

HOW DO I GET WI-FI 6?

Devices supporting Wi-Fi 6 are just starting to trickle out. You can already buy Wi-Fi 6 routers, but so far, they’re expensive high-end devices. A handful of laptops include the new generation of Wi-Fi. 

Does your Network Wifi-6 Ready? Call us today, Comnet Sales Team would be happy to help you out. 

20
May

Access Control System

What is physical security?

Physical security has traditionally been viewed as an unsexy and tedious topic that few want to tackle; however, everyone knows that safety and security must be adequately addressed. From talking to endless lines of hardware store reps about installing door locks, to antiquated, dystopian visions of bored security guards in rooms with dozens of CCTV monitors— the label of physical security does not necessarily inspire passion. We are here to tell you that it does not have to be that way. With cutting-edge technology and the Internet of Things revolution, the world of physical security has drastically changed—making your physical once a safe space has never been easier.

If you are new to the world of physical access control, you might have some questions:

  • Components, what are the pieces of an access control system and how does it work?
  • Why Access Control, why do people choose access control?
  • Managing and Using, who manages the day-to-day aspects of the system?
  • Quote and Cost, how much should I spend on an access control system and what is a sample quote?

Setup and Operation, how do I set up an access control system?

What is physical access control?

An access control system allows you to manage, monitor and maintain who has access to certain doors and at what time they can access them. The simplest type of access control “system” is a standard deadbolt with a brass key.

Why do we need access control?

The purpose of access control is to provide quick, convenient access control for authorized persons while, at the same time, restricting access for unauthorized people. Beyond the obvious reasons, there are more reasons why access control should play a significant role in your organization. The standard form of today’s access control is an “access card,” instead of the key, to grant access to a secured area. For access to larger buildings, the exterior door is managed by the building and the interior, or tenant, door access is managed by the individual company. Some companies need to be compliant with health data regulations (HIPAA) or credit card data regulations (PCI) or even with cyber standards, such as SOC2. The ability to pull compliance reports for access control, on demand, is a huge benefit.

Compliance

If you’re working in a company on expensive products or sensitive data then you definitely want to control and monitor who enters your facility.

IP / Data

If you have a lot of visitors or clients coming to your space, you might be looking for a welcoming experience at the front door or front desk. Access control not only improves your operations but it’s modern and impressive for visitors to use.

Experience

Think about a small business located in a larger building: The company will use the access card provided by the landlord to get in the front door. However, it is often the case that the landlord is not responsible for the specific office security. Thus, the small business might wish to install their own access control on their doors, and a separate intrusion detection alarm in the office, along with one or more video cameras.

Credentials

This is your electronic “key” and it grants you access. It could be an access card, ID badge, ID card or smartphone-based mobile app that acts as an electronic key. People use one, or a combination of all three, to gain access through the doors that are secured by an access control system. The form of access cards is the same as credit cards, so it fits in your wallet or purse; however, demagnetization is very common with basic access control cards. The benefit of using mobile credentials is that they are personalized, so any unlock event can be tracked back to the person associated with the credential.

Card Reader

The card reader, mounted on the wall, electronically reads your credentials, and sends a request to unlock the door (using your user credentials) to a server. Typically, the type of cards used are proximity cards, which require the card to be held in a 2” to 6” proximity to the reader—as opposed to being inserted. Card readers are mounted outside of the perimeter (exterior non-secured wall) and next to the door they should be unlocking. In addition to card readers, some access control systems provide the option of using keypads (PINS) or biometrics, instead of cards or smartphones, as credentials. This is rather uncommon, since PINs can easily be passed on and biometrics are difficult to manage—especially if employees or visitors don’t want to share their fingerprint with your company.

02
November

What’s the difference between OM3, OM4 and OM5 Multimode Fiber?

We understand all the advantages we can get from using Fiber Optics as means for data transmission such as low attenuation, infinite bandwidth, and non EMI/RFI … etc.

For Long Distance (Kilometers) we choose for Singlemode Fibers and using Lasers as transmitter whereas for building networks (meters) we go for Multimode Fibers that uses VCSEL transmitter.

Multimode optical fiber accepts many modes of light because it has a large numerical aperture.  It supports wavelength of 850nm and 1300nm.

Singlemode optical fiber accepts only the axial mode of light for propagation and it has small core diameter of about 7 to 9 micron.  There is no modal dispersion and hence this provides the largest bandwidth and ability to go the longest distance.

OM3, OM4 and OM5 are all laser optimized multimode fiber.

OM3 fiber was introduced way back in 1999 and it supports 300 meters for 10 Gb/s Ethernet. OM3 fiber with and effective modal bandwidth of 2000MHz/Km

OM4 fiber can support 550 meters for 10 Gb/s Ethernet with effective modal bandwidth of 4700MHz/Km

For 100 Gb/s Ethernet, OM3 can support 100 meters while OM4 is 125 meters.

Why OM5?

OM5 is also known as WBMMF –  Wideband multimode fiber.  

This means that OM5 can support WDM whereas OM3 and OM4 are for supporting only 1 wavelength at 850nm.

WDM is short for wavelength-division multiplexing.  WDM is technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths of laser light.  This enables 4 different transceivers to be multiplex into single fiber for Tx and another fiber for Rx. 

Next generations Terabit Ethernet (TbE)  200 and 400 Gigabit Ethernet uses WDM for multimode fiber and may use OM5 which has a band of 850nm to 953nm for the wavelength of transmitters.

Here is a look at WDM:

WDM had been applied extensively in singlemode fiber optics cables.

Basic (BWDM), Coarse (CWDM) and Dense (DWDM) are different methods employed for singlemode fiber optical systems.

BWDM uses 1310nm and 1550nm on 1 fiber.

CWDM provides 16 channels over 1530nm to 1565nm while DWDM can provide 40 channels using 100Ghz spacing or 80 channels using 50 GHz spacing.

WDM can be applied in Multimode fiber optics cables which can support 4 channels using 30nm wavelength spacing from 850nm to 953nm.

This is the new OM5 specified Multimode fiber optics cables,

OM5 Multimode fiber optics cables can support multiple ‘short’ wavelengths of between 850nm and 953nm that can be aggregated for higher bandwidth applications.  For 4 wavelength of light that can transmit 25Gps will results in 100Gps in a single fiber. Using a pair of fiber for DUPLEX therefore will allow the 100Gps transmission using only 2 fibers compared with 20 fibers via the 10Gbps X 10 lanes also known as Parallel Optics.

OM3 and OM4 is primarily designed to support a single wavelength of 850nm.

OM5 also has core of 50um and cladding of 125um which is the same as OM3 and OM4 and hence are backward compatible to these fibers.

For any applications / Systems operating at a single 850nm wavelength OM5 fiber provides no greater bandwidth than OM4.

23
June

What Is Structured Cabling?

Structured Cabling data room

Structured Cabling is a broad term for the linking of network devices in a system that consists of cabling and associated hardware, forming a comprehensive telecommunications infrastructure.

According to the Fiber Optic Association, “structured cabling is the standardized architecture and components for communications cabling specified by the EIA/TIA TR42 committee and used as a voluntary standard by manufacturers to ensure interoperability.

If well designed and installed by professionals, it will provide an infrastructure that ensures predictable performance as well as the ability to accommodate Moves, Additions and Changes (MAC) flexibly.

What is it used for?

Structured Cabling is a data transmission system that supports the transmission of data through a computer network, multiple voices, video, telephone services and other management systems such as security access and energy systems. Network Cabling is not device-dependent, so it serves a wide range of uses.

Every structured cabling system is unique to the company or organization. This is due to a few factors:

  • Architectural Structure of the building that houses the cabling system
  • Type of cable and connection products
  • Function of cabling installation
  • Type of equipment the cabling installation supports
  • Configuration of the current system
  • Customer Requirements
  • Manufacturer Warranties

While every structured cabling setup is unique and different for various purposes, there is a standardised method to complete and maintain cabling installations.

Structured Cabling wires

What are the six subsystems of a structured cabling system?

There are the main components of building a structured cabling system, and it consists of six subsystems:

1. Entrance Facility

This contains cables, network demarcation point(s) connecting hardware, protection devices and other equipment connecting to the access provider (AP) or private network cabling. This  includes connections between the outside plant and the cabling inside the building.

2. Equipment Room

This houses the centralised space for telecommunication equipment which is environmentally controlled, which is the house equipment and wiring consolidation points. This serves users inside the building or campus.

3. Telecommunications Room or Enclosure

This is an enclosed area designed  to house telecommunications equipment, cable terminations, cross-connects and distribution frames. In general, each building will have at least one telecommunications room or enclosure. The size of the room is dependent on the size of the service area.

4. Backbone Cabling

Also known as vertical cabling or wiring, it offers interconnection between entrance facilities, telecommunication rooms and equipment rooms. This is commonly done from floor to floor or between buildings. Equipment is to be connected by cables not longer than 30m. The cables can be fibre optic, coaxial, unshielded twisted-pair (UTP), and shielded twisted-pair (STP).

5. Horizontal Cabling

Horizontal cabling is the cabling between telecommunications information outlet in the work area and horizontal cross-connect in the telecommunication room(TR) or telecommunications enclosure(TE). This contains the telecommunications outlet, optional consolidation points, horizontal cable, mechanical terminations, patch cords or jumpers located in the TR or TE. It will usually run above the ceiling or below the floor. Ethernet or fibre optic cables are usually used for horizontal cabling.

6. Work Area

Components in the Work Area(WA) extend from the telecommunications outlet/connector end of the horizontal cabling system to the WA equipment, connecting to end-user equipment. WA components are also known as cable components, including patch cables, communication outlets and station equipment.

Structured Cabling cable

What are the benefits?

The benefits of using structured network cabling are:

  • Cost-Effective
  • Reduces the risk of downtime since it is organised, keeping errors and issues easy to identify
  • Time-Saving, as Structural Cabling is flexible to accommodate Moves, Additions and Changes (MAC) quickly.
  • Consistency of design and installation
  • Uniform documentation, easy for people who are new to understand how it runs.
  • Supplies higher bandwidth
  • All-in-one communication system that is streamlined for easy management
  • Reduce cost by unified all cable support systems into one

Structured Cabling is the recommended system for companies and organizations looking for an organised and standardized system for their cabling needs. It is important to choose the right kind of cabling system that fits the requirement of your project best, as it can have an impact on its functionality and cost of ownership. There are network cabling companies that provide structured cabling services that can serve your needs, however it is important to look for companies with the track records and industry certifications so as you can tap on their expertise and experience immediately for your project.

05
March
Network Cabling Services

Choosing between the OM3 and OM4 Fiber optic cables

Overview

The OM3 and OM4 fibers are laser-optimized with a 50/125 core, which is made to comply with the ISO 11801 Standard. The OM3 fiber specs indicate that the OM3 is particularly made for 10 Gb/s transmission speed, but it is also compatible with, and can function under 40 Gb/s and 100 Gb/s. The OM4 fiber is the improved version of the OM3 fiber. The OM4 fiber is mainly used for an Ethernet of 10G, 40G, and 100G. The OM3 and OM4 fiber optics have a minimum of 2000 MHz*km EMB (Effective Modal Bandwidth or laser bandwidth) and 4700 MHz*km EMB respectively. This means that the OM3 can move 2000 Megahertz of data up to 1 km, and OM4 can move 4700 Megahertz of data up to 1 km. For both OM3 and OM4 cables, the EMB is the most effective when the distance remains at 1 km or under; a distance of over 1 km would slow down transmission speed. Regarding compatibility, the OM4 is entirely backwards compatible with the OM3 fiber optics. The chart below provides detailed information on the minimum modal bandwidths of the OM3 and OM4 fibers.

Minimum Bandwidths Network Cabling Singapore

Distance and Speed

The OM3 and OM4 multimode fibers are compatible with 1GbE, 10GbE, 40GbE, and 100GbE applications, but their transmission distance depends on the application. The chart below displays the maximum transmission distances of the OM3 and OM4 fibers under different transmission speeds. Referring to a speed of 10 Gb/s as an example, with a distance of 550m, the OM4 fiber projects over a longer distance than the OM3 fiber, which only projects a distance of 330m.

However, through the usage of parallel-optics transmission technology, 40G and 100G Ethernet can transmit and receive data simultaneously over multiple fiber optics. The 40G interfaces are 4x10G channels on four fibers per direction, then the OM3/OM4 cable terminated with an 8/12 fiber MTP/MPO connector can be used for 40 Gb/s transmission. 100G interfaces are 10x10G channels on 10 fibers per direction, then the OM3/OM4 cable terminated with the 24 fiber MTP/MPO connector is supposed to support 100 Gb/s.

Ethernet Distance Singapore Network Cabling

Price Difference

The OM4 fiber cable costs a third more than the OM3 cable. To a large extent, cost also depends on the construction type of the cable (loose tube, tight buffered, etc.). The cost differences for the fiber accessories such as fiber patch panels, MTP cassette modules, and fiber patch cords, however, are minimal.

Choosing between OM3 or OM4 Fiber

To decide whether to choose the OM3 or OM4 fiber, you have two considerations to make. One being the distance limitations of your existing multimode network application. If it exceeds the distance of the OM3 fiber, then the OM4 fiber would be the natural choice. Secondly, you would also have to consider whether you would be upgrading to a higher network speed during the lifespan of the fiber optic cable plant. If you will be, the OM4 fiber would be able to provide you with higher data rates transmission at a longer distance.

11
February

ELV Cabling Solution

As an ELV Cabling Specialist with BCA ME04 L5 Work-head, besides data system, we integrate all your other ELV systems and services to operate seamlessly on a single cable plant, examples of such services are

  • VoIP telephony system
  • CCTV surveillance system
  • Traffic counting system
  • Security Control and Access system
  • PA system
  • Car-park System
  • Digital video /sign board/whiteboard
  • IPTV System
  • AV IT System
  • Power Management System
  • Building Management System
  • Other ELV systems
Network Cabling Singapore
Network Cabling in Singapore

We provide complete services for cabling & network ELV infrastructure from

  • Design
  • Installation
  • Testing & Commission
  • Maintenance & Enhancement
ELV Cabling Certificates

We are experienced in not only integrating the cabling system for different ELV systems but also designing and implementing network infrastructure to connect all the different ELV systems together.

How to select an ELV Cabling Specialist

  • Does the ELV Cabling Specialist have the relevant experience on the size of the project or the relevant BCA work-head to do the project?
  • Does the ELV Cabling Specialist have relevant experience on integrating different ELV systems together?
  • Does the ELV Cabling Specialist have relevant experience on integrating the network systems for different ELV systems together?
  • Does the ELV Cabling Specialist have certified cabling and network engineer to execute the project?

Challenges when integrating different ELV systems

  • Do you need to integrate with existing ELV systems?
  • Any distance limitation for ELV devices?
  • Any outdoor requirement for ELV devices?
  • Separate network system or integrated network system for all the different ELV Systems?
  • Do you need to customise the enclosure inside the ELV riser?
  • Is network IP routing required for different IP address range for the different ELV systems?
20
December

Selection and Sizing of Uninterruptible Power System

It is always confusing when you need to choose an Uninterruptable Power Supply (UPS) as each different UPS system has its own distinct performance characteristics. The common UPS designs are listed as follows

  1. Standby
  2. Line Interactive
  3. Standby-ferro
  4. Double conversion on-line
  5. Delta conversion on-line

Standby UPS

The Standby UPS is the most common used for stand-alone devices and desktop computer. This UPS is primary connected to the AC source and the transfer switch will switch the load to the battery/ inverter should the primary source fail. The UPS is known as Standby because the inverter only starts when the power failure. High efficiency, small size and low cost are the benefits for this type of UPS.

Standby UPS Diagram

Line Interactive UPS

The Line Interactive UPS design is commonly used for small business, web and departmental servers. The UPS inverter is always connected to the output of the UPS whereby providing AC power charging to the battery during normal times. When the AC power fails, the transfer switch opens, and power will flow from the battery to the load. As the inverter is always connected to the output, this UPS design will provide additional filtering and reduced switching transients as compared to the Standby UPS.

High efficiency, small size, low cost and high reliability coupled with the ability to correct voltage fluctuation makes it a preferred choice for 0.5-5KVA range.

Line Interactive UPS Diagram

Standby-Ferro UPS

At one time, the Standby-Ferro UPS was the dominant form of UPS in the 3-15kVA range. This design depends on a special saturating transformer that has three power connections. The output of the UPS is connected to the main power supply via the transfer switch and the transformer.In the event of a power failure, the transfer switch is opened, and the inverter picks up the output load.

The isolation from AC power transients provided by the Ferro transformer is as good as, or better than any filter available.However, the Ferro transformer itself creates severe output voltage distortion and transients, which can be worse than a poor AC connection. Even though it is a standby UPS by design, the Standby-Ferro generates a great deal of heat because the Ferro-resonant transformer is inherently inefficient. These transformers are also large relative to regular isolation transformers; the unit is generally large and heavy. Therefore Standby-Ferro UPS systems are no longer commonly used as they can be fundamentally unstable when operating a modern computer power supply load

Standby-Ferro UPS Diagram

Double Conversion On-Line UPS

This UPS design is commonly used in UPS above 10KVA. This design is quite similar to a standby UPS except that the primary path is an inverter instead of an AC main. In the event of a power failure, there is no transfer time as the input AC is charging the battery source which provide power for the output inverter. This type of UPS provides a n ideal electrical output performance but the constant wear on the power components reduce its reliability as compared to other designs. The input power drawn by the large battery charge also may be non-linear therefore can interfere with building power wiring or cause problem with the standby generator.

Double Conversion On-Line UPS Diagram

Delta conversion On-line UPS

This is the newer UPS technology is for the 5KVA- 1.6MW UPS to eliminate the drawbacks of the Double Conversion On-line UPS. This design exhibits the same behavior in the event of a power failure as the Double Conversion On-line UPS except that there is an additional delta converter to the inverter output incorporated in the circuitry.

The Delta Converter has two function. It controls the input power characteristics by drawing the power in a sinusoidal manner so to minimize the harmonics onto the utility. This will ensure optimal utility and generator system compatibility to reduce heating and system wear in the power distribution system. The second function is to control the input current and regulate the charging of the battery system. This type of UPS is also highly efficient due to the design is without the use of filter banks therefore is able to deliver power to the load with much greater efficiency as compared to the Double Conversion UPS.

Delta Conversion On-Line UPS Diagram

Conclusion

Each design of the UPS has its advantages and disadvantages depending on its different uses as no single type of UPS is ideal for all applications. To ease your selection for the right UPS, the following table is a summary of the different types of UPS for your different application and budget.

Summary of the Different Types of UPS

Some Tips From Us

  1. Tabulate a list of all the equipment to be supported by the Uninterruptible Power Supply company in Singapore.
  2. Confirm the power rating of each device to be backup. The rating can be watts or VA. Add them together.
  3. Multiply the total power consumption by a safety factor of 1.3 to cater for in-rush current surge and future expansion.
  4. Check for the requirement of the back-up time for the equipment. More space (additional external battery pack) is required if longer backup time is needed.
  5. Depending on the requirement, select either an offline, online or line-interactive Uninterruptible Power Supplies accordingly.
  6. Depending of site situation and configuration, centralise  Singapore Uninterruptible Power Supply maybe a more cost effective solution than multiple Uninterruptible Power Supply approach.
  7. Centralise Uninterruptible Power Supply will require “hard-wirings”, eg isolator, power cables, distribution board, etc
  8. De-centralise Uninterruptible Power Supply installation will be straight-forward and easier to implement.
  9. Check the incoming power availability (Single-phase or Three-phase breaker) in order to determine if electrical wirings is required.
  10. Always ensure there is 24 hours air-conditioning in the room.