Set Up IP Camera Security System |Using PoE NVR or external PoE Switch

There always has confusion about how to set up IP cameras security system with NVR. This article would provide basic steps and some useful information about connecting IP camera to PoE NVR or Non-PoE NVR.

 What is IP camera System?

 IP camera is a digital video camera which can be connected to the network, transporting images in real-time. Working with network video recorder (NVR), the ip camera system is able to deliver live video and security footage recording to the hard drive.

The below is the equipments needed for typical ip camera security system. 

  • IP cameras
  •  network Switch
  •  Power source
  • PoE NVR or Non-PoE NVR
  •  Monitor
  •  Enough cables

Note: PoE network switch is required when Non-PoE NVR is selected.

If the system is just being designed, Considering the PoE IP cameras and PoE switch can bring the great benefits.

What is PoE?

PoE (power over Ethernet) is a new technology that allows data and power are transported in one cable. It reduces cables usage in the system and saves installation time, especially when power source is hard to acquire in the field.

Non-PoE IP cameras also can be converted into PoE supported by using splitters which can separate power from data in the cable.

  • IP camera security system using PoE NVR

Take a look at the picture of PoE NVR, there has numbers of RJ45 ports at the rear, which can take in multiple ip cameras.

PoE ports: IP cameras.

LAN port: router or network hub.

HDMI: monitor or TV.

VGA: monitor (VGA). USB: connect a mouse for menu operation.

Audio Out: the external speaker.

Power: turn on/off the power

Firstly, connect all interfaces to the corresponding devices, then power up the NVR.

Next, login the NVR menu by using the mouse and add the camera to the system. Usually the NVR can discover the IP camera automatically. Once you see the live video pop up in the monitor, enter the network setting to change the IP address, and add the new password to the recorder which is important. Most of the surveillance system get hack because the users leave the system with default password.

How to watch the camera on the mobile phone? You will need to download an APP and add PoE NVR ID name to the app. Most of the NVR supports P2P connection today, basically no need to tweak the setting in your router in order to view the live video on the internet.

If you decide to add more IP cameras to the system, pick a PoE switch can provide extra RJ45 ports for the new camera. The NVR has limited resources to take in specific numbers of ip cameras. Checking the system you will find out how many new cameras the NVR still can take in.

  • IP camera security system using non-PoE NVR

Non-NVR has only one rj45 port for linking the system to main network. A PoE switch is required to connect all the cameras and non-PoE NVR together.

LAN port: PoE switch

 HDMI: monitor or TV.

VGA: monitor (VGA).  

USB: connect a mouse.

Audio Out: the external speaker. Power: turn on/off the power.

The connecting process is similar as PoE NVR solution. Instead the ip cameras are connected the PoE NVR, it will be linked to the PoE switch to supply the power and data.

If non-PoE solution is chose, the network hub will supply data for IP cameras only. AC outlets are needed closed to each ip cameras. It could increase installation time and unexpected cost. That is why we mentioned the PoE solution could save installation time and cost.

Here is the video showing how to set up IP cameras security system step by step in both ways.

Different Types of Power over Ethernet Adaptor

PoE adaptor (also name PoE injector) is a product which can send power and data through single Cat 5e/Cat 6 to remote powered devices. The PoE adaptor provides power solution to a wide range of network equipments such as IP cameras, access point and VoIP phone. Due to transparency to TCP/IP protocols, no configuration is required. The PoE adapter is a plug and play product.

PoE adaptor has different types based on power voltage. There are 12V/24V/48V adaptor. 12V PoE adaptor is the most primitive adaptor. As we know, an Ethernet cable has four twisted pairs. Two of the pairs are used for data delivery, and the spare pairs sent power to remote devices. No protection protocol is used in this type of adaptor. When the 12V adaptor is powered, electricity will be sent directly to PoE devices. Usually there is passive splitter at the other end to separate the power for remote device. As the voltage will drop down sharply while the distance is increasing, the 12V PoE adaptor can only be used in the short distance transportation.

Another type of PoE adaptor, 24V adaptor, can supply more power to devices. The DC24V injects the power to the Ethernet cable and the DC12V regulator is required at the remote device in order to output correct voltage. 24V adaptor sends power to 50 meter far. Voltage drop is being taken care of by the voltage regulator.

The last type of PoE adaptor is 48V adaptor. Before introducing the 48V PoE adaptor, one point should be known. That is passive and active PoE adaptor. Non-standard adaptor has no built-in PD signature detection. The adaptor will release DC48V directly when the powered device is plugged in at the end of RJ45 connector. The standard PoE adaptor will verify the remote device before adding the power to the Ethernet cable. The PD signature guarantees the safe process for power over Ethernet solution. Signature detection can avoid the device burned out and protect from the power surge. If the powered device fails to be verified as standard PoE devices, the adaptor will stop the power.

12V PoE adaptor can be used in 12V IP access point and other low voltage devices in short distance. A passive splitter is needed to split the power from the data. As no protection is added, you must have basic knowledge about how to operate the passive PoE adaptor. If you mix up with the twisted pairs, the remote device will be damaged immediately. The 24V PoE adaptor usually works with specific products. The regulator has to be included inside to convert to DC12V. It is better to limit the distance to 50 meters because of the voltage drop. The standard 48V PoE adaptor complies with the IEEE 802.3 specification. As long as the powered device also meet IEEE802.3 standard, the solution is plug and play. The adaptor can deliver data and power up to 100 meters.

To learn more about PoE adaptor or injector, check how to choose the right PoE injector for your network.

How to Choose a PoE switch – Actual Power Budget

The PoE switch sends not only the data, but also the power to the remote IP device, so the AC outlet closed to devices can be eliminated in the field. As we all known, the electric equipments only take the power it consumes. It has no relationship with the power budget from the power source. For example, the access point only draws 5W even 100W power adapter is being used. The below is power reference consumption of convenient network device.

Access point – 5W
IP camera without infrared – 6W
IP camera with infrared – 15W
Infrared PTZ camera – 20W
Infrared camera with heater -50W
Access control with door lock strike – 60W
Point of sales (POS) – 65W

These are the general estimated power. You may find the accurate data of your device from the label.

How to pick the PoE switch to meet the power demanding? There is IEEE 802.3 standard you can refer to. The typical two are IEEE 802.3af (also name PoE) and IEEE802.3at (also name PoE+). The PoE output 15.4W and the PoE+ output 30W. However this is not the actual power budget. It is only the maximum power that PoE switch injects to the Ethernet cable. The remained power budget is 12W for PoE and 25.5W for PoE+. Why there is difference between the output from PoE switch? That is because it always has power loss inline when the power is transported on the conduct. Then the power loss is converted to the heat eventually. The new IEEE 802.3bt standard is ready now. This new standard is capable of injecting 95W high power and the remained budget is kept to 72W at the front devices. It is going to benefit the application such as access control, POS, interactive display, cellular base stations, etc.

Can we have larger power budget if the distance is totally shorter than 100 meter, like only 50 meters? The answer is negative. The power budget has been predefined in IEEE 802.3 specification. The remained power is set to 72W even the distance is 1 meter. There are IC on both PoE switch and powered devices to control the power budget. However the low quality Ethernet cable could compromise the remain power. If the power loss is larger than it expects, it will create seriously voltage drop which could make the powered device(PD) fail to start up.

Do I actually have 30W on each ports if the PoE switch support PoE+? That may not be true. The PoE switch uses the shared power source. You may read the specification – 16 port PoE+ switch with 180W power. If all 16 ports supply 30W, it should be 480W power budget in total. As the electrical device only will take the power it consumes, some of the devices may only need 5W, like the access point. The 180W still could be enough for the whole system. It doesn’t have to be 480W for 16 ports outputting 30W.

Except for considering the maximum output of each ports, the total power demanding of the whole system needs to be calculated while choosing PoE switch. The IEEE 802.3 af/at/bt predefine the power capacity of single port. The real output also depends on the total power budget in the PoE switch.

There is one more thing about the power budget. It is better to reserve margin when you design the system. If the devices needs 12W, choosing PoE+ switch(FC 16 port switch) which can supply 25.5W is better because the system will not fully load all the time. The maximum cable distance is 100 meters between the PoE switch and powered device. Click choose the PoE extender can extend the network beyond 100 meters to learn about information.

Long Distance IP Camera Setup with PoE Network Extender

If you plan to install IP camera over 100 meters far away from the monitoring center and worry about the distance, PoE network extender can help. The network communicating will start getting worse when Ethernet cable is beyond 100 meters. Some unexpected phenomenon like connection drop and high latency will appear. The PoE network extender is designed to resolve these issues. Rather than convenient network extender, the Power over Ethernet technology is integrated to PoE extender which allows power and data are transported through single Ethernet cable. The power will be sent from the center as well as the data pass through each extender. 4 PoE extenders together can extend 500 meters PoE network by using daisy chain setup.

A PoE switch or PoE injector is required in monitoring center to inject the power to the Ethernet cable. So no extra power source is needed for each extender. The AC outlet is eliminated. The setup process is simple – plug and play. One end of PoE extender connects the cable from the PoE switch, and the other end links to extended cable.

Somethings need to be addressed out while using PoE extender to work with IP camera.

Usually the cable can be hanged in the air or buried under the ground. If you choose to hang up the cable, it is better to add plastic tube to protect the cable. The PoE extender is waterproof and requires no extra protection, but the cable may need the protection from harsh environments outdoors. Adding the tube also can ease the electricity discharge. When power and data are being transported in long distance, it becomes more easier to absorb the ESD in the air which can be sent to the devices and damage them eventually. If cable line is buried under the ground, the PoE network extender need to be placed in some protective closure because of moisture in the soil. Placing the extender in a closure is good for future maintaining.

High quality cable should be used when setting up IP camera. Cat 5e/Cat 6 are qualified grade. Make sure pure copper cable is used. Cat 5e/Cat 6 has high speed, but it doesn’t guarantee the material of the cable. The pure copper can decrease the power loss on the cable, otherwise power loss will turn to new issues if low quality cable is used. It will be converted to heat inline and create voltage drop at the other end of the cable.

What will happen while doing the wrong connection? If the IP camera cannot be powered, first thing is to check the PoE extender. The extender has two different ports, out and in. In port should be linked to PoE switch or injector to receive power and data and out port is to power IP camera. The IP camera could not work if the extender’s port is misconnected. The next thing is to make sure the twisted pair has the right sequence. Move the IP camera to the connection before the first extender. This can help you role out the issue even you don’t have network tester. The connector always needs to be paid attention. As more connectors are created, the possible failed points increase as well. The final thing is to be sure the pure copper cable is employed in the system. As we mentioned above, low quality cable can create power loss and voltage drop. If the remained voltage is lower than the camera required, the PoE power system will never turn on.

Want to find more information about extending the network without the limitation of distance? Click best way to extend the network beyond 100m.

Features Differences Between Fully managed, Smart managed and Visual PoE switch

As we all know, the biggest difference between managed and unmanaged PoE switch is whether it has interface to configure the setting or not. There are 3 types of managed PoE switch in the market – Fully managed, Web smart managed and LCD smart managed.

What is the smart managed? Actually, the “smart” is kind of managed which has set limitation of management features. Compared with fully managed, smart managed reduces some advanced functions, leaving behind basic controls and monitoring of the settings for exchanging and forwarding data. The smart managed PoE switch requires less operation and is friendly for home application as well as small-medium companies where the technicians don’t need to tweak the network configuration.

Most fully managed switch can be accessed by command line interface via a RS-232C console port, telnet or SSH session, even a web GUI. It has advanced management options with wide range of configuration and flexibility. Smart managed usually is lack of console port, probably don’t support telnet or SSH either, only web GUI is reserved.

  • Fully managed

Fully managed PoE switch has complete control of operational status. The operator can define the behavior of each ports. For example, there is 16-port fully managed PoE switch connecting many security data devices. Users can set each port through the console and giving orders from PC like allowing 1-4 port having priority data flow and blocking visitors from specific IP address.

•    High-levels of network security, control and management.

•    Limit access to specific devices, prioritize user traffic and partition a network.

•    Layer 3 routing capability to link smaller networks into much larger business-wide networks.

•    Remotely monitor network performance, detect and repair network problems without having to physically check devices or requiring network services.

•    Optimize a network’s speed and resource utilization.

Management method: Console or web GUI

  •   Web smart managed

The Web smart managed has part of full managed functions and the smart PoE switch is usually only can be accessed through Web browser. It benefits for non-professional users who want simplified control options and plug and play.

Including but not limited to:

•    Offer options like QoS, VLANs, ect.

•    For VoIP phones, small VLANs, and working groups for places like labs.

•    Configure ports, basic settings and set up virtual networks.

•    Assign higher priority to critical traffic.

•    Divide your network into multiple virtual networks for better traffic security and reliable connectivity.

•    Allocate network bandwidth the way you work.

Management method: web browser GUI

  •   Visual smart managed

This is new type of PoE switch fall into niche market between managed and unmanaged. The visual PoE switch has LCD screen display built-in which can show power and data traffic status running in each port real-time. Users are able to manage and adjust setting through LCD screen directly without involving in a PC computer. It is convenient for who want to understand their network with no hassle operation.

•    Flag traffic flow, priority the PoE power, VLAN

•    Port management and status, and SFP information

•    Troubleshooting: cable diagnostic and remote IP ping

•    Maintenance: reboot, factory default and save configuration

Management method: LCD screen and press button in switch.

The managed PoE switch should be picked basing on the network requirement and the knowledge the operators possess. The smart PoE managed can satisfy home usage as well as small-medium companies. Look into the PoE technology while upgrading the existed devices, it save installation time and cost.

Best PoE switch pick | High Quality Recommendation

How to choose a PoE switch? There is some basic knowledge to know before making the decision.

PoE switch is a special network switch integrated with Power over Ethernet (PoE) technology. It can supply power and data at the same time as well as providing platform for data exchanging. The PoE switch can be classified in unmanaged, fully managed and smart managed types.

  • Unmanaged PoE switch

Unmanaged means that users can’t manipulate the settings of the network and each ports. You can think unmanaged PoE switch as PoE ports extender. When there is no enough RJ45 PoE port in the field for new devices, adding unmanaged switch can simply provide the extension. Unmanaged PoE switch usually is connected to main network for uplink. It fits in the home and small business applications where people don’t want to tweak the settings.

  • Fully Managed PoE switch for professional

Fully managed switch provides the comprehensive network settings to the operators. The PoE switch configuration is fully open. The user should be responsible for the setting of the switch. If the network go wrong, it is on your own make it right. The operators need to possess professional knowledge to operate fully managed switch. The switch can either access by web browser or Simple Network management protocol (SNMP). It is suitable for technician who wants to have full control of the network.

  • Smart PoE switch for small and medium-sized company

The smart PoE switch can be considered as lite version of fully managed switch. The users also have access to switch through web browser. However, only basic functions are preserved. Without advanced functions, the PoE switch can be built with less powerful DSP hardware solution. Usually the smart PoE switch is cheaper than fully managed switch.

There is new PoE switch form appears these years. It is called visual PoE switch. A small LCD display screen is built-in, plus the press key buttons, the user can access and configure the PoE switch in the field without any special tools.

Price on the market: Fully Managed > Smart/Display managed> Unmanaged

Besides, the power budget, port number and speed need to be considered while choosing PoE switch.

The PoE switch provides not only the data but also the power to the remote network devices. The IEEE802.3 standards pre-define the maximum output power of each port. IEEE802.3af provides 15.4W and IEEE802at (also name PoE+) provides 25.5W. IEEE802.3bt is the new generation technology which can inject 95W high power to Ethernet cable . It is important to understand only PoE switch and powered devices (PD) such as IP camera, access point, VoIP both comply with same standards will be able to deliver the pre-defined power budget. For example IEEE802.3at switch powers IEEE802.3af IP camera will only output maximum 15.4W, not 25.5W. Moreover, the totally power budget of PoE switch need to be aware. The PoE switch uses the share power source. The total power budget determines how much power each ports can be allocated when the system is full loaded.

The next thing is numbers of PoE ports you need. It depends on the IP devices in your network system. 4-8-16-24-48 ports PoE switches are available in the market. It is a good idea to preserve some PoE ports for future usage. You never know when you will need to add more devices to the system. The PoE switch will includes one or two uplinks ports which can be connected to main network. The fiber optical connection is available from some PoE switch for long distance and low latency communicating.

The speed and latency is another specification matter. If high speed and low latency is required, the full gigabit PoE switch is a good choose. For some special application, like the IP cameras surveillance system, the gigabit or fast PoE switch makes no difference, because the data rate of each camera is less than 15mbps. However, the uplinks port is better to be gigabit. There is where all the data gather together and pass through before reaching the up-stream network or network video recorder (NVR).

Here would show you some good products with reasonable budget and reputations.

Netgear Parameter Parameter



GS116NA
1.unmanaged
2.16 ports
3.Slient operation
4.Support 802.3af/802.3at

$72.99

Recommended reason:

Netgear has certain popularity for networking products. Unmanaged means simply plug and play. 16 ports and IEEE802.3af/802.3at compatible are able to satisfy most home and small business application. Silent operations, no fan, work in the normal temperature such as indoor. Consider it when budget is tight.

Cisco Parameter Parameter


SLM2008PT-NA

1.Smart managed
2.8-port(4reg-4PoE)
3. Support 802.3af/802.3at  


$146.64

Recommended reason:

Cisco is always being networking industry leader and its products stand high quality. With smart managed, this traffic can be set and controlled through web browser for each port. IEEE802.3af/802.3at can meet most of basic equipments powered demands.

Fastcabling ParameterParameter

Visual Gigabit PoE
Switch with SFP
1.Smart managed with 8ports
2.LCD visual screen
3. Support 802.3af/802.3at and Gigabit
4. Network self-recovery/SFP slot  
$168.57

Recommended reason:

This LCD managed switch provides the simply and intuitive way to monitor and manage the PoE network. The critical information including the power, data, status are display on screen. No extra tools are required to maintain the network in the field. Network can self recovered automatically when remote IP devices are hangs or freezes. Consider it for small-medium business or office.

Ubiquit Parameter Parameter

US-16-150W
1.Managed
2.16 ports
3.802.3af/at PoE compatibility
4.150W available power
$279.25

Recommended reason:

Ubiquiti has produced a lots of PoE switches. 16 ports and gigabit speed, this managed PoE switch is also 802.3af/at PoE compatibility and has 150W power source. It would be a good choice if don’t mind budget. Consider it when you want to monitor each port on the station. The PoE switch is the core component of power over Ethernet network. Other equipment such as PoE splitter, PoE extender may still require for standard PoE network. Click to check know more about other PoE devices.

How PoE Injector Works with Splitter for Power over Ethernet?

When building a network system, PoE technology is always good to be considered. PoE (Power over Ethernet) makes power supply and data exchange via one Ethernet cable possible. PoE injector and splitter are two major equipments for transporting the power and data over single ethernet cable. The injector adds the electricity power to Ethernet cable, and the splitter separates the power from the data at the other end. Injector usually has two RJ45 ports, one for receiving data from switch and another for sending out power/data combined signal to the remote devices. Similar as injector, the splitter also has two RJ45 ports. Instead of sending out power and data, the splitter receives data and power and then separates them for non-PoE device.

PoE injector and PoE splitter usually work in pairs. The injector sends out power and data to splitter, and PoE splitter separates data and power into two different cables to make devices work. The PoE injector and splitter solution is designed for non-PoE devices or a mixture of PoE compatible and non-PoE compatible devices.

Except for PoE injector and splitter, a non-PoE switch is required in a typical network system. A non-PoE switch provides platform for connected devices to exchange data. As the PoE injector doesn’t process the data, it has to be connected to a non-PoE switch for data exchange. The PoE injector usually has AC input so it should be plugged in AC power outlet. Now the injector can take the power from outlet and combine it with the data from non-PoE switch before sending out. The splitter stays at the other end of the cable closed to powered device (PD) such as IP camera, access point, VoIP. These powered devices receive the power and data separately from a splitter.

There are three IEEE 802.3 standards for PoE technology. As long as PoE injector and splitter comply with IEEE802.3 standard, it guarantees the power transporting with pre-defined power budget in the system safely.

Different standard provides different power budget. IEEE 802.3at, 802.3af and 802.3bt standard are commonly used. IEEE 802.3af supplies 15.4W, which is the lowest among the three standards. 30.8W power can be provided when the injector and splitter are compatible with IEEE 802.3at (also named PoE+). The IEEE 802.3bt standard is the next generation PoE which increases maximum PoE power up to 95W by taking all 4 twisted pairs wires to transporting the power.

Voltage is another factor in the PoE injector/splitter power system. DC12V and 5V are two main types of power voltage being used in the market. A lot of PoE splitter are designed for DC12V power output. If you use low voltage device like IP camera, 12V PoE splitter is the right one.

Both Cat 5e/Cat 6 ethernet cable can be used to setup PoE injector/splitter power system. Cat 5e/Cat 6 consists of four twisted pairs of wires. Two of the twisted pairs are used for data sending in fast network, which is also called data pair. The spare pairs could be employed to transport the power. Pure copper Ethernet cable should be chosen because pure copper can reduce the power loss on the cable. The electricity transporting on conducts will generate energy loss and be converted to heat. If the low quality cable is picked, the power loss will become serious.

Using PoE injector and splitter solution simplifies network system setup. The AC outlet is removed at the front end and the power is sent by the injector from the center. It is cost-effective and money-saving. Attention should be paid when choosing the PoE injector and splitter.

Power over Ethernet voltage 12V-24V-48V-57V

The power over Ethernet inject the power to cat5e or cat6 network cable, so the remote ip devices is able to retrieve both power and data from single cable at the other end. According to the standard EN62368 (for AV & IT Equipment), the limit at which under no safeguards are required is DC60V or 2mA. We are seeing different voltage not higher than or equal to DC57V are being used on power over Ethernet. Let’s talk about the differences about these voltage on power over Ethernet.

One thing need to be addressed before we move ahead is the voltage drop. While using cable to send the power, there is always power loss inline cable which will be converted to the heat. The consequently result is the voltage drop at the other end. If the voltage drop down lower than the remote devices require, the whole system will stop working. For example, the WiFi router requires DC9V, but the remain voltage is only 7V after 100 meters transporting, the power will not be able to supply the WiFi router.

DC12 voltage power

This is the raw solution. The power is injected to the spare pairs of the Ethernet cable and being sent to the remote network devices. There is no process and protection for the power. This is the most simplest PoE solution which could still work for short distance and low power consumption on indoor application. If use this solution to transport power longer than 20 meters, the remain voltage will drop down sharply at the other end.

DC24 voltage power

It is popular in some telecom application. Some of electrical devices require DC12V input. Injecting DC24V to the cable can adapt to the voltage drop after medium distance transportation such as 50 meters. The other side usually requires voltage regulator to convert remain voltage to DC12V. There is around 12V margin to adapt to the voltage drop, that is why the maximum distance could be longer.

DC48 volts power

DC48V is the specification from IEEE802.3 PoE standard. According to IEEE802.3, the power is capable of transporting up to 100meters as well as data. The other end requires regulator to convert to lower DC output such as 12V or 5V. IEEE802.3 also specified the power budget within 100meters including PoE PoE+, PoE bt. The higher power consumption, the higher the current inline, so the sharper voltage drop will be. As long as the products are IEEE 802.3 compatible, the voltage is no need to be concerned. Both issues has been considered when the standard was developed. Not only IEEE802.3 standard PoE use DC48V. Some of the passive PoE also use DC48V.

Over DC48 voltage

In these years the higher voltage such as DC55 has been applied to power over Ethernet including IEEE 802.3 compatible products. The benefits of high voltage PoE is reducing the power loss cable inline and relase the voltage drop issue. For example the IEEE 802.3bt PoE power system can transport 95w power over single Ethernet. If use DC48V, the voltage drap becomes seriously when the power is being full load. The DC53V is taken in, so the remain voltage is still enough after 100 meters transporting.

IEEE 802.3 PoE is considered as safe power system. That is because not only the power voltage has been designed for Ethernet cable, but also PD signature is introduced in the standard to guarantee the power PD signature is being sent to the device.

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How to pick the right PoE switch?

According to WiKi, “switch is a network device used for electrical (or optical) signal forwarding. It provides an exclusive electrical signal path for any two network nodes that access the switch.” Generally speaking, the network switch connects multiple ip devices together and provides the platform for these devices to data exchanging.

PoE (Power over Ethernet) switch is a special switch that can transport not only data but also power at the same time through single cat5e or cat6. For example, some of IP devices need to be connected to network in home or small office. Like all other electronic equipments, these devices require power and network communicating. With convenient switch, you have to wire 2 separated cables in order to send both power and data. PoE switch has integrated power source into network switch which can supply both within one cable. The extra power cord can be removed eventually. The PoE switch reduces the number of cables being used and simplifies system installation.

How to pick the suitable PoE switch? Consider the following points.

  • Managed vs Unmanaged

Managed     PoE switch provides the most comprehensive functions to manage your network including VLAN, CLI, IP routing, etc. User can access the switch by using web browser and set the limitations to each port. Those operations will be able to deliver more security for private and business network. Usually users require comprehensive knowledge to configure the managed PoE switch. The cost is always higher.

  • Umanaged switch is designed for users who don’t want to tweak the network setting. There is no web browser built-in to configure the parameters. It is simply plug and play. The features such as CIL, may not be available with unmanaged PoE switch.

There is new form of PoE switch appears now – visual PoE switch. The visual PoE switch had LCD screen Display built-in with some press keys on the front panel. User can access the switch by using the LCD screen and those press key. Visual PoE switch doesn’t own all the features of managed switch. Only the critical functions such as VLAN, PoE power assignment, network monitoring are available. The visual PoE switch is the form between managed and unmanaged. Providing necessary controls of PoE network while still maintains the easy of operating. It is fit for small and medium-sized company who needs easily use and higher security.333

The visual LCD screen brings extra benefit, it displays the critical information of the switch in real time including power budget taking by each ip device, data rate, and any errors messages from the switch. You don’t have to make a fuss when you meet exceptions because you know exactly which parts had gone wrong.

  • Power budget

PoE switch provides the data exchange as well as output DC power to the remote device. Check the specific before you choose the PoE switch, make sure you will have enough power budget for remote devices. The IEEE 802.3af PoE can deliver at most 15.4 watts while IEEE802.3at PoE+ can deliver at most 30 watts. Latest IEEE 802.3bt which has been named as next generation PoE is capable of output 95w high power. There is trap with these specifications. Those power budget is not the actual power the remote devices are receiving. For example, the IEEE 802.3at (PoE+) identify the maximum power injecting to the Ethernet cable is 30W, but maximum remain power has been set to 25.5w according to PoE+ standard. The power loss on the cable has to be considered when IEEE802.3 standard was developed. The remaining power for IEEE802.3af is 12W while IEEE802.3bt standard has 72W remain power.

Not only the power budget in single PoE port, but also the total budgets need to be considered as well. The PoE switch usually uses a sharing power source. A 24-port PoE+ switch with 380W total budget is capable of supplying 380W in the system, but it doesn’t mean you can connect 24 PoE+ (30W) network devices to this witch. Otherwise it will require 720W totally power budget, not 380W. It is necessarily to calculate the totally budget the system require, not only the maximum output in single ports. The PoE+ specific each ports is capable of output 30W, it doesn’t guarantee full 30W output on all the ports. It depends on the remaining power budget after taking by existed devices.

  • PoE ports – 4/8/16/24/48

There are different types of PoE switch with different PoE ports available. Usually the PoE switch has one or two extra uplink ports without power which can be connected to the main network. It is always better to preserve some ports for future usage. You never know when you will need to add the new device to the network. The second uplink port is developed these years which can be used for video recorder while setup the ip cameras surveillance system.

  • Cooling system.

The PoE switch has integrated the power sources which generate much more heat than convenient network switch. For most of electronic products, good heat dissipation and stability lead to better performance. Heat dissipation would straightly affect use life. Bad heat dissipation causes high temperature, which easily lead to short circuit and error. Especially when the PoE switch is deployed outdoors. The PoE switch need to have well cooling designed.

  • Network Self Recovering

Some of the network may hangs and freeze after long time running. Usually unplugged the network cable from PoE port can force remote device to reboot and bring back the connection. Some of PoE switch has ability to self recovering, It will detect communication link between remote IP devices, such as VoIP camera, access point. Once remote devices are hangs or freezes, the PoE switch can reboot devices automatically by switch off the power and switch on after.

So let’s sum up all the picking points:

1. Managed or unmanaged and visual PoE switch

2. Power budget (IEEE 802.3 af/at/bt standard)

3. Enough PoE ports.

4.Product performance(heat dissipation/cooling system)

5.network Self recovering(camera/access point)

Consider PoE products when you upgrade the existed system.

It saves cost and installing time. Where the network goes, the power source followed.

Choose the Right PoE Injector for Your Network

The PoE technology has become a trend in power supply and network communicating. PoE ( Power over Ethernet) provides the solution to send power and data to remote devices by using single cable. There are many PoE related products, such as PoE switch, PoE extender, PoE injector and so on. All those PoE products play an important role for power supply and network extension. Here we will focus on PoE injector.

Before choosing the suitable PoE injector, let’s understand what is PoE injector.

A PoE injector or midspan injector can send the power and data through one Cat 5e/Cat 6 network cable. Electricity will be added to the injector and send over Ethernet. Eventually it reaches to the remote ip devices. The PoE injector usually has two RJ45 ports, one port for connecting the convenient switch to receive data, and another port for sending out both power and data to remote ip devices such as PoE IP cameras, access point, etc.

The PoE power system is perfectly safe. That is because of the PD signature detection. PD signature detection can avoid machine burned out. What is PD signature detection? The injector sends low voltage power to detect the front-end device before releasing the power. If the PoE injector confirms the remote device do accept the power over Ethernet, the injector will increase the voltage step by step until the end device is working stably. Therefore, the detection process can protect devices effectively.

There are several types of PoE injectors available in the market. Before you choose the right one to be applied in your network. One trap you should avoid. That is the passive injector.

People seldom pay attention to the difference between active injector and passive injector. Active injector complies with the IEEE802.3 standard which is the safe PoE. This kind of injector has PD signature detection as we mentioned above so it will detect whether the signal returns from remote ip device is correct or not. If signal is verified, the active PoE injector will increase the voltage gradually to make device work. Passive PoE injector has removed the function of signature detection, so it can’t detect the feedback signal. Once the Ethernet cable is plugged in, the injector will send the power directly to devices. And this may cause electrical damage to device. Watch the video to see the difference between passive PoE and active PoE.

Here are several types of injectors you can pick. First type is the PoE injector with IEEE 802.3af or 802.3at compatible. IEEE802.3af provides DC power up to 15.4W, while 802.3at up to 25.5W. Both power and data are injected through the PoE injector, then they will be sent to device over one Ethernet cable. The PoE injector belongs to active PoE injector. It can detect the power voltage automatically to avoid damage to device.

PoE switch is also a kind of injector. However it is little different from PoE injector. The PoE switch can be considered as an injector is built in to network switch. The PoE switch provides both power and data exchange for remote IP devices such IP cameras or access point. As the PoE switch has many ports like 8/16/24 ports, more IP devices will be able to connected to PoE switch to receive the power and data exchange.

95W PoE injector is the next generation of PoE injector. It not only meets the IEEE 802.3at/af standard but also 802.3bt, the newest standard. 95W power can be injected to Ethernet cable, so it is suitable for network devices demanding high power.

PoE NVR can be classified to PoE injector. NVR, also called network video recorder, controlS the connected cameras and storeS the video footage conveniently. PoE NVR has integrated PoE technology. It doesn’t need extra power supply and data for exchanging. Power and data will be delivered to cameras after they are connected to PoE NVR. It simplifies the surveillance system setup.

The PoE technology proves the value by saving the installation cost, simplifing the network design. Where the cable goes, the power source follows. You may want to consider even when you upgrade your existed devices.