Extend network between two building – both copper and fiber optical

Long distance network transmission always confuses us. As we know, network signal transmission is limited by copper material. If using cropper cable to transmit network over 100 meters, the signal would become too weak to support devices working.

With convenient network, we are able to set up IP camera system to improve security safety. In the case of building A to building B, backyard to garage, warehouse to home, firstly it should have network connectivity there. In some situation, we may have to consider the power as well. Electronic equipments such as IP cameras, access point VoIP, not only need data but also power. In order to guarantee the devices working well 24/7, reliable and convenient network with power system are very essential.

The article would show 3 ways to extend network from one place to another. If you want to extend network between 100-500 meters, the first solution is right choice to go. If longer distance is required, like home to farms, the last 2 ways has provided some useful ideas.

  • Long distance up to 500 meters.

In this way, we can use PoE products to extend network up to 500 meters. It allows us to extend network distance like home to backyard warehouse.

 Equipment needed:

1. PoE switch

2. PoE extenders

3. Cat5e cables

You may confuse what is PoE and how it helps to extend network? PoE, power over Ethernet, is a technology that transports data and power over single Ethernet cable. That’s mean we do not need to prepare extra power adaptor which will reduce cables and simplify installation.

How it works? PoE switch transports data and power to front-end IP devices. It always has power source equipment such as PoE switch or PoE injector at back-end. These PoE switch or injector will send the power and data to the extender, the PoE extender catch it and boost up for next 100 meters. 4 units PoE extenders link together with daisy chain setup can provide totally 500 meters PoE network.

Firstly, we need one PoE switch port to connect to PoE extender. Now the PoE extender gets data and power which will transport both of them to IP device or next PoE extender with Cat5e/cat6 cables.

If we need to expand RJ45 ports at the front end, we can use pass through PoE switch. Similar as PoE extender, pass through PoE switch is powered by a PoE injector at back-end, and create multiple PoE ports for remote ip devices. As the latest IEEE802.3bt standard is employed, the pass through PoE switchsupply total power budget up to 71W.

  • Long distance up to 80KM (Power from front-end)

Equipment needed:

1. PoE switch

2. Fiber cable

3. Media converter

4 .Ethernet cables

If the power source is available at the front end, what we need is the media converter to set up the fiber link network. The advantage of fiber optical cable is fast speed, low latency and long distance. It is basically the light transmission in the fiber cable. The fiber optical signal will be converted back to electronic signal and go through Ethernet cable after media converter.

Firstly, install SFP modules on PoE switch and media converter. If PoE switch has SFP slot, it saves one media converter. Otherwise, two media converters are needed at two building. The network system needs a converter to transfer optic signal into electronic signal.

Now use fiber line to link SFP and another media converter.

Finally we can connect the two building with fiber optical cable.

In addition, if we want to use media converter to back up multiple IP devices, we can connect the media converter to network switch. The switch would get data from converter and support data to multiple IP devices.

  • Long distance up to 2.5km(Power from back-end)

This connection way is to solve the issue while the power source is difficult to acquire at front end. As we know, fiber optical cable does not deliver power and electronic devices need power to supply it work. In this way, building A would like to offer power as well as data.

Equipment needed:

1. Media converter

2. Fiber PoE extender.

3. Siamese fiber cable

Similar as above solution, it needs to set put fiber optical link between two buildings. The fiber optical can’t transport the power, however we can add one pair copper or Siamese fiber optical cable which has integrated copper cable to send the power in parallel. The voltage drop is the first issue for long distance power transmission. DC55-DC57V is properly voltage as it is safety to human being. After fiber PoE extender receives the power, it will boost up the voltage and regulate to DC48V output for front end PoE devices. Both non-PoE and PoE equipment can’t be connected to the fiber PoE extender at the other end. Constructed to voltage drop, the maximum meaningful PoE distance is 2500-3000 meters, the voltage will become too low to supply the PoE ip device, most of the power will be loss on the cable. The fiber PoE extender is convenient tool for long distance PoE network, where the network go, the power follow.

General speaking, if extends network from 2 building within 500 meter, user can choose PoE extender to repeater network. It is good choice for user to pick fiber solutions while extends network far from 2.5km. Click here and show Practical tips to improve your WiFi signal

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Essential guide to pick a PoE Injector

Do you get any challenge to figure out how to power your IP devices, such as wireless access points, VoIP phones, and IP cameras? These pieces of equipment require communicating network and power source to bring it up. The convention switch only provides the network for communicating but no power. There is still power supply problem you will need to deal with.

The power over Ethernet (PoE) technology allows single Ethernet cable to transmit power and data to your remote IP devices. Both PoE switch and PoE injector are able to add the power to single Ethernet cable. If you already have an existing non-PoE switch and only have desire of adding PoE to the network, PoE injector(or midspan injector) is a good choice to solve the power supply problem instead of purchasing a new PoE switch.

If you are a green hand in shopping for PoE injectors, you must overwhelmed by the technical features available as well as be confused with various optional products. So in order to select a cost-effective PoE injector, somethings that you should pay attention to and understand

What is PoE injector?

First of all, let’s understand the concept of PoE. Like we mentioned previously, the PoE utilizes a single Ethernet cable to provide both data connection and electric power to your powered devices (PD) such as wireless access points, IP cameras, and VoIP phones. This feature allows remote devices to be powered with no need of a separate power supply or an electrical AC outlet nearby.

Therefore PoE injector(Midspan) is a type of PSE(Power Source Equipment), which injects power without affecting the data through Ethernet cable(Cat 5e/Cat 6).

There are two types of PoE injector, passive PoE injector and active PoE injector.

  • Passive injector

In the common “passive” PoE system, 2 twisted pairs (4 wires) in Ethernet cable are simply merged into two wires to transport the electric power from an external power adapter.

While active injector is integrated with power source with the voltage and wattage are determined by the injector.

In addition to, active PoE injector also divides into standard and non-standard type. What’s the difference is whether the injector and the powered device have some protocols in common or not. The standard PoE injector complies with three standards, namely, IEEE 802.3af, IEEE 802.3at or IEEE 802.3bt power negotiation protocols while non-standard PoE injector transmits power to the powered device without negotiation of its required voltage or wattage from remote ip devices, and merely supplies power at all times, that is why it is also known as “always ON”.

This below are some tips for selecting a suitable PoE injector.

  • Tip one: Confirm the Voltage

You should check the maximum input voltage of the PoE powered devices and the output voltage of the PoE injector, in case that they fail to match. PoE injector has different types in accordance with the output power voltage, generally dividing into 12V, 24V, 48V. Technically, higher voltage injector can be used in farther distance, because the voltage will drop down sharply along with the increasing distance.

  • Tip two: Estimate power budget.

You should estimate the power of the PoE powered devices require, preventing unnecessary waste in purchasing high power budget injector. As we know, power consumption is existing during the power transmission. So distance should be took into consideration. You are supposed to pick an injector with a little higher power than your powered devices need.

  • Tip three: Try not to use passive injector if possible.

Although passive injector is in low cost, it is unsafe for people without basic technical knowledge.

What’s more, in the following we will elaborate on the details of typical PoE injector products.

  • Passive PoE injector

This is the common passive PoE injector you can find in the market, most of them are unbranded products. It may have different color or shape, technically it works exactly the same. Two of twisted pair into two cables to transit low voltage power. As we know, only 2 twisted pair are being taken to transmit 10/100mpbs fast network, leave 2 spare twisted to send the power. The passive PoE switch doesn’t support gigabit network which needs all 4 pairs to transport the data. If passive PoE are using with gigabit network, the bandwidth will low down to 100mbps fast network automatically. The passive PoE usually works in pairs, a passive splitter are required at remote end to separate the power wire from Ethernet cable. As no power negotiation and protection, the passive PoE system only can handle the low voltage and the short distance power. If the cable is too long, such as 30 meters, some of the power will loss on the cable which is converted to heat, the remained voltage may become too low to supply you IP devices. Why the passive PoE are still popular? Except for cost-effective, the passive PoE accept the external power adaptor. If your front-end devices needs some uncommon voltage from its customs power adaptor, you may need the passive PoE system to take in the power from its original power adaptor.

Tips: switch off the system power before making any connection. As zero protection with passive injector, the plug in process during the connection may create power surge and damage your remote devices.

Voltage: depends on external power source

Watt: same as voltage

Distance: less than 15 meters, even shorter

Power negotiation: NO

Short Circuit protection: No

Over load protection: No

Power surge protection: NO

  • Active PoE injectors

non-standard PoE injectors

The second types is 24VDC/48VDC non-standard active PoE injectors. Why we said no standard because these injectors doesn’t follow any specification such as IEEE802.3 which requires power negotiation before releasing the power. properly there is no protection as well. The ieee802.3 introduces two verification steps also name PD signature. Firstly, the Inejctor send low voltage (5V) to front end IP device meanwhile measure the current feedback. If the return current is right, the injector will go to step 2 to classify the ip device to determine what the maximum power the injector should provide. The non-standard injectors have none of these protocols. One of the reason the reason is both injector and splitter needs chipset to complete the PD signature process. At the beginning, different manufacturers were facing the compatible issue even both injector and splitter claim to be IEEE802.3 standard products, because return signal has been set to different value in above power negotiation process. In this case, the Non standard injector may skip the compatible issue because it send the power once the injector is plug in a AC outlet. Of course, it is not safe operation. Ubiqui is one of exceptions who provides non-standard PoE injector but still add the protection to the injector. However these products may doesn’t power standard PoE IP devices.

Standard PoE injector

The main stream injector are compatibile with ieee802.3 standard now. The benefits of standard PoE product are plug and play. Basically need no concern to the voltage and distance. What you need to choose is the power budget. There are three standard IEEE802.3 af/at/bt.

IEEE 802.3af

This IEEE 802.3af (PoE) standard supports the delivery of power up to 15.4W, offering DC 48V power over Ethernet cables. The 2nd classification step we mentioned above can determine the maximum power transport over the Ethernet cable. This suits for the powered devices such as wireless access points, IP cameras, and VoIP phones. According to the distance between the PoE injector and the powered devices where you want to set up should be less than 100m as voltage will sharp down.

Voltage: 48V

Watt: 15.4W

Distance: within 100m

Power negotiation: IEEE 802.3af

Short Circuit protection: Yes

Over load protection: Yes

Power surge protection: Yes

IEEE 802.3at

The IEEE 802.3at (PoE+) standard increase the power up to 30W. The remain power budget is set to 25.5W at the splitter, which delivers around 2 times power to remote devices. It benefit the high power demanding equipment such as PTZ camera, access control. Both PoE and PoE+ has been in the market for more than 10 years. There was compatible issues at beginning especially for PoE+ because the PD signature process require more precise feedback value. Now most of the PoE injectors are compatible with PoE and PoE+.

High power 30W power Capability

PoE extender

quick and easy install

Power source integrated – All in one


IEEE 802.3bt

The IEEE802.3bt PoE injector is new standard which is capable of output 90W maximum power. Similar as few years ago when PoE+ (30W) appeared, only few 90W PoE injector are available in the market. You need to choose 90W PoE splitter to match the injector as the splitter module is not integrated in the front devices yet. The ieee802.3bt employ 4 twisted pair ethernet cable to transport the power and data. The remain power budget is set to 71W.  This can benefit the power hungry device such as LED lighting, PTZ camera, Point of Sale terminals, touch screen computer. The IEEE802.3bt injector uses dual PD signature verification process. The first Pd signature will verify it is backwards compatible with PoE and PoE+, after first signature pass, it moves to second signature which means there are two power negotiation before releasing 90W power. Another similar protocols but doesn’t belong to ieee802.3 is AoH which can injector 95W power, the remain power budget is 72W. The 100W is almost the limit power over single Ethernet cable. In order to bring up the power, either increase voltage or current will create the safe issue which fails to meet the regulation. The next technology is the digital power which can transport higher power budget safety. The below is the video about the 95W PoE system which support both IEEE802.3bt and PoH standard.

Advanced next generation PoE

All-in-One touch PC

95W 4 pairs

intellgent LED indicator for real time

Ultra PoE splitter

PoH Power over HD-Based-T 95W

3X power

Leave a comments below if you have any questions.


How to build a PoE network system for high powered devices?

Practical Tips to Improve your WiFi Signal

Confronting awful WiFi signal coverage is annoying right? When you are walking into the stairs, the WiFi suddenly disappeared. If you have tried the common solutions like upgrade firmware and play with antenna to improve your WiFi signal, but they didn’t make good result. Here are some practical tips to offer. First of all, let’s figure out what causes the poor WiFi connectivity.

The WiFi employs 2.4Ghz or 5.8Ghz to transmit the signal in the air which is easier to weaken by the obstructions such as the walls. One wall will weaken WiFi signal to 80%, and two walls will go down to 50% left. Some people think 5.8Ghz WiFi router can improve WiFi signal, which may not always true. If the WiFi is weaken by obstructions, the 5.8Ghz WiFi router only makes it worse. Although the 5.8Ghz WiFi router is capable of carrying higher volume data, meanwhile it compromises the penetrating capacity, which means its transmission distance is shorten than the 2.4Ghz WiFi router. An instinct way to bypass the obstructions is relocating the WiFi router. However, sometimes you will have no condition to move the router. Because WiFi router has to set closed to the network entrance. The first practical tip is that you can use a repeater to receive the WiFi signal from the main router and transmit forward to the destination. Look at the image below. There are 4 walls between the WiFi router and the bedroom which causes the dark zone. Now if we place a repeater at the living room will reduce the obstructions to 2 walls. The key is to find the path for the WiFi signal to bypass the obstructions, usually it is the L shape. The repeater should be placed at the turning point of the L.

There are two ways to repeat the WiFi signal. If you already have an old WiFi router in hand, now this is a chance to re-use it. What you should do is to connect your old router to the main router through WiFi. Actually it is not complicated as you think.

  • Re-use your Existed WiFi Router

Firstly, power up the old router and make the connection by using a laptop or Mobil phone, then login the router in the web browser. If you don’t remember the IP address or the login account, usually you can find the information at the bottom of the router. Find the reset button and depress for more than 10 seconds after the router is powered up. This operation can restore the factory setting which allows you to login with default account. In the Wifi setting page, you can see the WDS option unchecked. Mark the checkbox and it will present the network search option in the page. Use this search option to connect this router to your main WiFi network. There are two more steps to go through. Turn off the DHCP and change the IP address of this router in case that it may have IP conflict with your main router. Once you have done these setting properly, the WiFi router will work as WiFi repeater.

  • Pick WiFi Repeater

If you feel too much bother to tweak the setting in the router, you can simply buy a WiFi repeater. WiFi repeater (aka WiFi extender) works much similiar as your old router here. But the setting is simpler. The DHCP and IP address conflict issues are avoided by the default setting as the product is designed for WiFi repeating purpose. Simply plug the repeater to the AC outlet, it will create internal WiFi which allows you to access by using the mobile phone or tablet. After you login the repeater, you can connect the repeater to your main WiFi network, and the repeater will start forwarding the WiFi which works exactly the same as the above WiFi router.

  • Move Antenna Outside

The WiFi signal is being transmitted through the antenna. While there are thick walls that weaken the signal, move the antenna to another side to bypass the walls which could improve the WiFi signal. This solution doesn’t always work, because some of the WiFi signal could be consumed while transmitting along with the extension cable. It’s too weak for the remained signal to spread out. People mentioned to turn to high power antenna, I don’t recommend it, as the antenna needs to match the original power design of your router. Replace with high power antenna while the router can’t provide enough power which makes the case worse.

WiFi router and repeater try to bypass the obstructions by changing the direction. It only reduces the obstructions but not eliminates it. The seconds practical solution is to mix wire and WiFi connection. Use the wire cable to transmit network signal to the dark zones and create WiFi signal from there. There are several ways to make it.

  • Powerline Adaptor

The power line adaptor takes used or existed AC power line to transmit network data. The network signal is converted before being injected to the power line with adaptor and picked up at other AC outlet by another adaptor. After that, it will generate new WiFi signal. If you have WiFi birdhouse camera in the garden, it relies on the WiFi connectivity. Use the power line adaptor can easily extend the WiFi signal closed to the camera as long as the AC outlet is nearby. Two important things about the power line solution. The adaptor only works in the same electric meter. Both transmitter adaptor and receiver adaptor need to stay in the same meter. And the second thing is that power line requires qualification cables in the building. If the building is very old with poor cabling job, the power adaptor may have problem to transmit the data.

  • PoE WiFi access point

PoE WiFi access point receives network signal by using the Ethernet cable and generates new WiFi dignal in the field. The connection between PoE WiFi access point and the main router is cable link, which can provide reliable high speed up to 1000 gigabytes. Moreover, multiple WiFi access points can be deployed to improve the WiFi signal to coverage different areas. The advantages of PoE WiFi access point is both power and data can be transmitted to the access point by using signal Ethernet cable. Wherever the cable is, the power source follows. The power is added to cable at the router by using the PoE injector.

  • Long distance WiFi PoE extender

As we know that the cat5/cat6 cable connection is limited to 100 meters. If the WiFi signal needs to be extended over 100 meters, such as from the lake to the house, you may need the PoE extender to repeat the network signal. The PoE extender can repeat the network signal up to 500 meters. The PoE WiFi access point will be installed at the end of 500 meters and create the WiFi signal to cover the area. It’s of great convenience that the PoE extender doesn’t require power source closed to each repeater. The power is added to the cable inline by PoE injector. The power adaptors are eliminated in the daisy chain setup.

The last but not least, sometimes the poor WiFi is not caused by the obstructions, but jamed with neighbor’s WiFi, because there are too many WiFi working in the field. I saw people has more than 25 WiFi hot spots picking up in his phone, the WiFi signal is so craw so it gets jam. Sometimes you experience the poor WiFi connection occasionally such as at night or at weekend. Properly the WiFi is too crowded. People use WiFi more often in these time frames. You can simply check the WiFi hot spot with mobile phone. If in such case, except for bringing your WiFi more closely, you can switch the WiFi channel in your WiFi router to avoid the jam.

  • Channel switch

What is WiFi channel?

Think of the walkie-talkie which has different channels to communicate with each other. The WiFi router has around 13 channels, it is set to auto selection in default. What you can do is to login your WiFi router and manually switch the channel to test whether the situation improved. It is important to choose the moment to make the change when WiFi connectivity became worse. Only this moment you can know which channel is being jam. Reboot the router after you switch to new channel, your mobile device will make the WiFi connection to the new channel.

The above is the all the possible solutions that I offer for help. If you do have any new idea or all above tips still can’t improve your WiFi network, please leave a message in the comment section. Here is the article about how to set up home network with PoE switch.

DIY Home Network System

Network is basic but important medium to our work and life by far. E-mail is usually the way that we use to communicate with others in business, and we also rely on WiFi to chat with friends, or watch funny videos online. Therefore, the network should provide sufficient resources (bandwidth) for every family member. Besides, the IP camera system could be added to the network as home security system though which may take up parts of network resources as well.

This article would go through the factors you should know while building a home network system and how you can get a reliable network by using PoE products.

What is PoE? Power over Ethernet (PoE) is a technology that allows single Ethernet cable to transmit both data and power which saves connecting cables and installation time. The PoE products can repeat network and power up to 500 meters.

Factors need to be considered:

  •      Network connections

Before building a network, it is essential to think of whether the network you will need in the next few years. You may think that the children are still in young age, they have not so much need of network. But few years later, they need to rely on digital devices in study and social activities. The design of network should be made by the prediction of living situations in a few years later.

  •      Distance/ House space

As we all know, Ethernet signal can be affected by distance. The maximum distance of cat5e/cat6 cable without a repeater is 100 meters. You need to calculate the farthest distance from the network router. The network extender is needed if the distance is more than 100 meters. The WiFi signal is easy to be weakened by some obstacles such as walls. So review the blueprint and find the best spot to put up the WiFi router in order to optimize the WiFi coverage.

  •      IP cameras security system

Obviously, IP cameras security system has become more popular these days. The cameras are able to watch the front door, backyard and other special places. Both wireless and wired cameras need to be connected to home network which will take up the network resource to transmit the video.

Now let’s start to DIY home network system. It divides into WiFi and wired network. These two methods can be effectively mixed and matched basing on the demands, offering comprehensive coverage and stability network connection with PoE products.

  •      WiFi

The power line adaptor or WiFi booster can be chose to enhance or expand the WiFi signal. WiFi connectivity is less reliable and it can get influenced by different reasons, even just neighbor’s WiFi signal is in the field.

Power line adaptor can expand the network signal in short distance within the same electric meter. And it usually works in pair. You can find it in online shops such as Amazon or Ebay. Connect one adaptor to the AC outlet closed to the main router. Then plug another to any AC outlet where you want to extend the WiFi signal.

WiFi booster, also called WiFi repeater, is not router. How does it enhance the WiFi signal? After installing the booster in the field, it will receive the signal from WiFi router and forward to other direction. Then your devices like mobile phone, tablet can have WiFi connectivity in some blind spots.

  •      Wired

It is common and safe way to use cable solutions to build network system. PoE delivers stable network signal in long distance.

To expand WiFi signal, PoE injector is needed. And what is PoE injector? PoE injector adds power to Ethernet cable and transmits along with data to the remote device. The WiFi router can be setup in the place where the power doesn’t present. The below is the video to demonstrate how to power PoE router.

Besides, while network distance is beyond 100 meters, PoE extender can help in convenient way. Thanks to PoE technology, because one PoE extender can extend 100 meters of the network coverage. In other word, it is easy to extend the network from main router to backyard by using PoE WiFi access point.

The switch is the core devices for home network system. Choosing the right PoE switch can simplify your network design.

PoE IP Camera VS Analog Camera

To start with the topic, let’s make clear the definition between PoE IP camera and analog camera. PoE IP camera, also called IP camera, is a digital video camera. It receives data over the Internet through Ethernet cable. Every IP camera has its own IP address in order to connect to network to transfer images. Analog camera captures analog video image and transfers it with coax cable. The analog camera needs to convert the video to analog so that video can be received by analog devices.

Actually the comparison of IP camera and analog camera is the comparison of the traditional and new technology.

4 main differences of these two cameras will be discussed in the following.

  • Video Quality.

Undoubtedly, IP camera has higher video quality than analog camera. It offers wide or narrow field of view and better zoom-in capability. Since it uses digital signal to transmit the video, it can recognize the faces and numbers clearly. Compared with IP camera, analog camera has a overall lower video quality. Zoom-in capability doesn’t exist in the camera and the site range is limited. Not to mention the facial and number recognition.

  • Distance

IP camera has 100 meters distance limitation with Ethernet cable. Because the IP camera sends digital image, the clarity of the image will be 100% percent maintained and sent back to NVR. Analog camera can be set up to 300 meters over coax cable. Although analog connection is longer, the clarity will lose as the distance increases.

  • Cost

 Building up IP camera system is expensive. The cost of IP cameras is higher than analog cameras.

  • PoE capability

 IP camera can be powered by twisted Ethernet cable instead of running the electrical wire. But analog camera is not PoE-supported.

Except for the different features below, PoE IP camera and analog camera are powered and connected to different devices. IP camera needs to be linked to Network Video Recorder(NVR) to record videos down. There is a product called PoE NVR which can provide both power and network solutions to cameras. To build the NVR system Cat 5e/Cat 6 Ethernet cable should be applied to transmit data. Besides, IP camera is not necessary to link directly to the NVR. As the camera is on the same network that connects to the NVR, the videos can be recorded down. However, analog camera can only be connected to Digital Video Recorder(DVR). Analog cameras connect to the DVR via the coaxial cable. In the DVR system, power will not be sent directly to cameras. So, if you choose to use the DVR system, you have to solve the problem of power.

Generally speaking, IP camera and analog camera has its own pros and cons. Hope this article would give you some tips on choosing the camera system. Click here to learn more about the differences between DVR and PoE NVR.   Click here to know how to Set up Home IP Camera System with Power over Ethernet.


DVR and NVR is the critical part of camera security system. People choose either DVR or NVR as recording equipment. This article would like to go through basic knowledge about what’s difference between DVR and NVR.

  • What is DVR?

DVR, digital video recorder, is kind of electronic device that records video in digital format and usually used with analog cameras. It digitalizes the analog video and saves to the hard disks as footage. Due to DVR only accepts analog signal, it couldn’t be connected to different type cameras but analog cameras. The connection way is point-to-point. Every camera needs two cables, one connects DVR and another connects to power source. It brings some limitations when security system needs to be upgraded.

  • What is PoE NVR? 

PoE NVR, is network video recorder integrated with PoE technology. As we know, NVR provides video storage as well as remotely viewing. In the IP camera system, the video is being encoded and processed at the ip cameras, NVR simply receive the Digitalize data, write to the hard drive and decode it before output to a monitor. In addition, NVR accept video stream from both wired or WiFi security cameras while DVR only works with wired analog video.

PoE allowing data and power are being transported over single cable after IP cameras is connected to PoE NVR, it doesn’t require extra power cord to supply the power. All you need just one cat5e cable connecting the cameras to PoE NVR.

The following are some major differences between DVR and PoE NVR.

  •      Video Signal

As mentioned above, DVR accepts analog signal while PoE NVR accepts IP video signal. The difference would affect image quality. IP camera provides HD videos and images, showing clearly faces, motions as well as the detail, which enhance security. The traditional analog couldn’t offer better image detail. However, the new analog camera system appears including AHD, TVT these years which can deliver HD video. It improves the image quality dramatically. Still the image detail are not good as IP camera comparing with same resolution, because the analog video transporting over cable will always involve in data loss.

  •      Connecting way

DVR requires cameras point-to-point connection directly with coaxial BNC cable. This cable does not deliver power or offer audio connections. Extra cable is needed for power source. As the analog video is pretty much the raw data, it is easier to get interference during the transporting. While the audio is needed, RCA connection has to be added.

PoE NVR uses one cable to supply the camera with data and power. The power adaptor or AC outlet are eliminated closed to each cameras. Furthermore, PoE provides the capacity to repeat the network connection up to 500M. Power line and WiFi offer the flexible way to connect IP cameras . No matter wired or WiFi cameras, PoE NVR can simply take them into the system.

  •      System upgrade

Unlike DVR, the PoE NVR or NVR doesn’t process the data. The data is being handled before transporting to NVR recorder. PoE IP camera system takes all the advantages of network technologies. It provides much more flexibility while setting up the surveillance system. For example, users want to expand the monitoring area and add more cameras to the field. This could be the headache for the DVR because the connection ports are fixed. The PoE NVR accepts the cameras either from the PoE port or the network. Even it doesn’t have extra ports for new cameras. Simply add PoE switch can expand the cameras connection easily. Click to learn more how to use external PoE switch to build ip camera system.

4 Factors Should Know Before Choosing PoE Cable

Ethernet Cable are being used to linked the different network devices. PoE (power over Ethernet), is a technology that can transport data and power over single Ethernet cable. PoE devices take the twisted pair in category cables to send the power. While buying PoE products, you may find IEEE802.3 standard always stand up. The IEEE 802.3 specifics how the power should transported in Ethernet cable and what is the maximum power budget. The IEEE802.3af supply 15.4 watts and IEEE802.3at (also name PoE+) supply 30 watts, which fit for lower power consumption devices like IP cameras, access points, VoIP. IEEE802.3 bt is the next generation PoE power which can offer 95 watts power . It benefits high power demanding equipments such as Televisions and interactive displays, Point of Sales (POS) and information kiosks. Therefore, different network devices may need different power and the suitable cable should be picked to match the requirements.

Considering 4 factors before picks the cable for PoE.

  •   Speed

There’re many cables with different speed on the market, including Cat3, Cat5, Cat6, Cat7 and so on.

From the table, it is clear to know cables’ speeds are different. Nowadays, most of home and business network have 100Mbps even 1000Mbps network. Cat5e should be the minimum choice today. If cables are being using in large computer communication or data transmission, Cat6 and Cat7 should be considered as well.

  •   Conductor Size and Material

As we know, conductor’s resistance brings bad effect on power transmissions. The electric currently pass through cable and convert to the heat because of the inline resistance. While the conductor size is small, the resistance is larger and the heat will be higher as well. Usually the cat6 and cat7 cable has the larger dimension than cat5 and cat4. If there is too much power loss cable inline, the remote powered devices may don’t have enough voltage to start up. Pick the bigger size conductor if possible.

Moreover, what made of the conductor does matter. Some manufacturers try to cut off cable costs by using copper-clad (or dipped) aluminum wires to replace pure copper core, which leads to higher resistance. It is going to accelerate the power loss inline. Check the cable’s material. It must be fit into the standard specification. Generally, pure copper is always the best.

  •   Plenum-Rated/Temperature

Other than the core of the cable, the outer skin needs to be checked. The plenum rated is relative to fire requirement. Check the fire code especially when the cables are been deployed to the public facilities such as Hospital, hotel, city hall. Air and water causes negative impact to cables in outdoor application. The cables are easy to get damage somehow while it is exposure directly. Choose the Cable with UV resistance can greatly reduce contact with air and provides better waterproof rate.

Common temperature ratings for cables are 60°C, 75°C and 90°C. If the temperature rises up in the environment, the electrical performance will become worse. Estimate the operating temperature before picking the cable.

  •   Installation

No matter what the cable category and construction structure, while large bundle of cable stick together, it will make heat accumulated which could cause safety issue. Be careful this could turn into problems while installing the cables in the dense place.

Cable speed, conductor size, material, plenum-rated, temperature and installation need to be overseen before choosing the cable. In addition, price is also a factor. If the cable are being selling too lower price, it may need to double confirm the quality. We mentioned the long distance power transport will make the voltage drop. Different voltage can be applied to power over Ethernet (PoE) cable.

 Click here show you Long distance IP Camera setup with PoE network extender.

Best PoE switch for IP cameras

IP camera security system is a type of surveillance system which can transport video in real-time and record the footage to SD card or hard drive. It is common practice to set up the ip camera system by using a PoE switch. The PoE switch has integrated with PoE technology which allows both power and data to be transported through single Ethernet cable. The power adaptor doesn’t need present closed to the camera anymore. The PoE saves the installation cost and makes the setup easily. How to choose PoE switch? This article will go through the things you need to know before buying a PoE switch.

· Speed
There have 2 major kinds of PoE switch for ip camera system in the market, 100M and 1000M gigabit. Few 10G PoE switch are available as well. The speed is about how fast the data can be processed and transported between the devices. Actually, 100M PoE switch is good enough for IP cameras. The data rate of 8 megapixel camera is only about 20 Mbps per channel. Usually, there are uplink ports which will be connected to NVR or main network. It is better to have gigabits capacity on those ports, as all the data are gathering there. If the budget is not tight, pick the full Gigabit, but make not much difference. The 100M PoE switch can meet the bandwidth demands from ip cameras system for home or small-medium business.

· Power budget
Th PoE switch not only supply the network communicating but also the power to remote ip camera. While connecting all the cameras to PoE switch, it is necessary to confirm each of IP cameras has received enough power. The IEEE802.3 af/at specific the maximum power output in single port. IEEE802.af standard supply 12W and and IEEE802.3at (PoE+) supply 25.5W. The camera with infrared usually takes less than 12W. 25.5W will be enough for PTZ camera. However, it may need high power when heat is built in to the camera. The 95W IEEE802.3 bt standard products are ready now.

· Ports and SFP
Choosing different number ports of PoE switch depends on quantity of IP cameras in the system. It is always good to reserve some ports for future usage. There are 6, 8, 12, 24 ports on the market. You can expand the ports by adding new PoE switch. While one PoE switch is not enough for all the ip cameras, add a new switch and connect to the first one will increase the ports easily.

Some of the PoE switch has two empty slots next to the uplink port. It is the slot for SFP module. What is SFP? SFP, small form-factor Pluggable, is a compact, hot-pluggable optical module transceiver used for both telecommunication and data through fiber optical cable. The advantage of fiber optical is fast speed, low latency and long distance. With SFP, two switches can be linked together in several kilometers. The maximum fiber network distance is 80KM. If there is long distance between two switches, SFP fiber optical is the right solution to go. The maximum cable network distance is 100 meter. Even using network extender, it can be extended to 500 meters only.

VLAN is quit essential for IP cameras system. A virtual LAN (VLAN) isolates the RJ45 ports next to each other at the data link layer. Generally speaking, the camera connecting to the PoE ports can’t see each other with VLAN enable. They are blocked by the VLAN. All the PoE ports only have path to the uplink. It can guarantee the cameras operating independently without interference. If someone try to take advantage of one camera to get other, it can’t be done when VLAN is enable.

· Manageability
There are 3 types of PoE switch on the market, fully managed, smart managed and unmanaged. Both Fully managed and smart managed PoE switch allow users to adjust and control every port’s power and network traffic, VLAN etc. Smart managed PoE switch reserve the partial functions of fully managed, like visual smart managed PoE switch which has LCD display built in. The users can monitor all connecting status in real-time and configure switch by using button around the LCD screen.

Not only the PoE switch, but also PoE NVR can be used to set up IP camera system. Click to find out the differences between external PoE switch and PoE NVR in IP camera security system.

4 common Ways to Extend Ethernet – short and long distance

With the development of the Internet, people rely on the network for their works and keep communicating with each other. This requires good network connection in office and home. In this article, we will introduce 4 common ways to extend Ethernet to avoid network blind spot.

  • Power line

The first way is using power line. It is new fashion devices to extend network signal within limited space. Power-line adaptors convert the network signal and add to the AC power line in home or office. The power line solution takes advantage of existed power cable to transmit the data simultaneously as the AC electric power. This solution has one constrains. It only works within the same power meter. If there are different power meters for each floor in the building, the power line solution couldn’t cross pass between two floors.

The power line adaptors usually work in pair, including transmitter and receiver. Plug the receiver into AC outlet closed to main network. Then more than one transmitter can be added in different rooms to pick up the network signal. Some of the power line transmitters support WiFi which can generate WiFi signal in those areas.

  • WiFi booster

The WiFi booster is the most common way to extend WiFi signal. WiFi booster, also name WiFi extender, repeats the WiFi signal from your router. In most of the case, the WiFi signal is being weakly by the walls. The WiFi booster can be installed on the right spots to pick up the signal and forward to destination. Usually, it is the L sharp path to avoid blocking from the multiple walls. The WiFi booster is installed in the turning point of L.

The WiFi signal not only can be weaken by the walls, but also can be jam by each others while there are too many access points picking up from the neighbors’. One of the possible solutions is switching the WiFi channel to avoid the signal crush. Usually the WiFi router supports manual pick the communicating channel.

  • Network Extender for up to 500 meters

According to IEEE802 standard, the network distance is limited to 100meters far. While the network installation spot is beyond 100meters, the network extender may help. The extender can repeat network up to 500meters with daisy chain setup. However, the convenient Network extender requires power source. Image there’re 2 network extenders for 300 meter. The power adapter has to be presented in each of these two extenders which bring new trouble. PoE network extender can deal with this power source issues.

What is PoE network extender? It is integrated with power over Ethernet technology which allows transporting data and power in one cable. So the power adapter can be removed. If users want 300 meters network, just connect 2 PoE extenders. The PoE extender can even power the remote ip devices if it is IEEE802.3 complaint.

The power will be add to the Ethernet cable by using PoE injector or switch closed to the main router. The PoE extender is simple plug and play products. No program required.

  • Optical Fiber – repeat long distance network.

The advantages is fiber optical is high speed, low latency, and long distance. The fiber optical can easily transmit communicating network up to 20 kilometers. Fiber optical refers to the medium and the technology associated with the transmission of information as light pulses along a glass or plastic fiber strand. It needs straight line to transport the light and only data can be sent through. Because of fiber optical characteristics, there’s almost no loss and the speed is extremely fast.

It is fit for network communicating from building to building, even from city to city. In fact, the long distance network basically employs fiber optical technology today. If users want to setup network distance over 500 meters or above, fiber optical is a good way to go,

Generally speaking, PoE solutions and Fiber optical are suitable for long distance network extension. If network extending requires in short distance or limited space, Power line and WiFi booster can meet demand. Watch the video below see how to extend the network by using the power line adaptor.

PoE IP Camera Not Work| Test with PoE switch

IP cameras are part of the modern security system. It is important to keep the devices working smoothly, so the system is capable of providing the live video for monitoring and footage recording 24/7. This article would provide some guides about where to check when a IP camera stop working.

It is common practical to use PoE switch in IP camera system. The PoE technology can supply power and data over single Ethernet cable to reduce the cable usage. It saves installation time and cost eventually.

The PoE switch usually has two indicated LED with each ports. There indicator are helpful tool to diagnose the status of cameras.

The Power LEDs is ON

The power ports should be continuous ON when the PoE switch is sending out the power. If the power LED is ON but, but no live video shows on the monitor. Simple dis-connect the Ethernet cable from the PoE switch and plug it back. This operation will turn off the power and force the camera to reboot. Sometimes the IP cameras get hangs or freezes after long time operation. Reboot the camera will bring it back online.

  • The Power LEDs switch between ON/OFF

If the power LED keeps switching between ON-OFF slowly, which means the switch detects the IP camera. For some reason, the switch refuses to release the power. In IEEE802.3, the PoE switch has to detect and classify the IP camera before sending out the full power. This PD signature process guarantees the power is being sent to the right place.

There are some possible reasons causes PoE switch refusing to release the power.

The IP camera goes defective is one of them. Fo example, the network IC is damaged by power surge which causes the ultra-low current or ultra-high current if the camera gets short Circuit.

The Ethernet cable also may trigger the PoE switch refusing power. The maximum cable distance is 100 meter between the switch and camera. However if the low quality cable is used, that distance will shorten sharply. When the cable is longer than expected, the power will loss inline and converts to the heat. The consequence result is the voltage drop. When the voltage is too low, it can’t start up the IP camera. In order to roll out this possibility, use DC12V power adaptor to supply the camera, see whether the video get back online or not.

If the distance is too far from the monitor center, use PoE extender to extend the network over 100 meters.

The RJ45 connector needs to be checked for reliability. Use test meter to measure the integrity of the Ethernet cable. If the connector is not reliable or the cable is broken somewhere, the test meters will give you the results immediately.

Once the power LEDs is on, the data indicator should keep flashing when there is data forwarding and exchanging. Usually the flashing speed depends on how much data the camera sending out. For example, the PoE camera is linked to network, but no activated client software watching this camera. The data indicator flashing becomes slowly. Once you start watching the live video, it will flash fast. One of the special case is the data indicator flashing extremely fast even no connection to the camera. It causes by defective network IC in the camera.

  • Data indicator OFF

If the data indicator is completely off. Disconnect the Ethernet cable and plug it back, check how both LEDs behavior. If the power LEDs is ON but data LEDs never turn ON, The camera module is failed. The power module is independents from the camera module. As long as the power module is working, the camera will receive the power, but can’t produce the video.

Both indicators LEDs works

If both indicators flash correctly, there is no video on the monitor. Check the network setting of IP camera. See whether the camera has unique IP address or not. If double use the same IP address while adding new network devices to the network. It will create the IP address conflicts in the system. Next possible reason is some of the IP camera may return to the default IP address automatically after long term operating. Use the discover tools on software or NVR can discover all the available camera in the same network. Add the camera back to the system if that is the case.

If inspecting with above steps is too much bother, visual PoE switch could provide help.

Compared with convenient PoE switch, visual PoE switch has a LCD screen which can display all the connected devices with operating status, such as power and data situations, traffic flow and connections in real-time. While the PoE IP cameras go wrong, checking the visual smart PoE switch screen, you would get the information about which cameras have problems and what the problem it is. Locate the cause and deal with it quickly. Watch the video below to know how visual PoE switch works.