PoE NVR and PoE Switch

Difference between PoE NVR and PoE Switch?

Sir “I’m going to install two IP cameras in my house. However, I have no idea whether to use a PoE NVR or a PoE switch matching with them. So, what’s the difference between them? “

Hello “Arindam sir, this is XXX from BBB, as you are security expert, I realy confused from my cctv vendor, someone quote PoE based NVR someone quote PoE switch with Normal NVR. Please suggest which technology is best for us.”

Such type of questions I face throughout 2018, which indicates many people feel confused about the selection between PoE NVR and PoE switch. This write-ups / blog intends to explore the differences between PoE NVR and PoE switch in details.

What Is PoE?

PoE, an abbreviated form of Power over Ethernet, allows a single CAT cable connecting a power sourcing equipment (PSE) to provide both data connection and electric power to powered devices (PDs) such as IP cameras, wireless access points, etc.

What Is a PoE NVR?

NVR represents for network video recorder which provides you with centralized video controls to easily view, manage, and store your surveillance footage in one convenient location. A PoE NVR is a security video recorder with built-in PoE switch designed to use with PoE-based IP cameras.

Equipped with a PoE switch, a PoE NVR recorder can deliver both data and power over a single Ethernet cable. There is no need for an additional PoE switch, which will reduce the cost of equipment in theory. You just need to connect one Ethernet cable from the camera to the PoE NVR recorder and then the built-in switch will provide power to the camera while transmitting data.

A PoE NVR is ideal for users with minimal network administration experience and is generally used in homes and small businesses. It creates a private camera network, keeping surveillance footage isolated from the main network and adding an extra layer of privacy.

What Is a PoE Switch?

A PoE switch or power over Ethernet switch, containing multiple Ethernet RJ45 ports, is a dedicated network switch with multiple Ethernet ports to connect network segments and provide power and network communications.

It expands a network created by a router. Basically, it just assigns LAN IP addresses to your camera and needs to be tied into a system that allows you to see and manage your cameras, which is usually done with video surveillance software on a computer. Therefore, it must be connected directly to a router on the same network as your NVR. It can reduce the need for extra outlets and extension cables and saves deployment cost and labor efforts as well.

Power over Ethernet switch can be classified into many types. In addition to the most common one, gigabit PoE switch, for example, there are other types as well such as unmanaged and managed PoE switches. Most PoE switches provided in the market have standard gigabit Ethernet ports which can provide speed of 10/100/1000Mbps. For smaller network, 8-port Gigabit PoE switch is very popular. For larger/enterprise network, we use 24-port PoE switch and 48-port managed switch.

Main difference between a PoE NVR & PoE Switch

From the above, you will see that both PoE NVR and PoE switch can provide power and data transmission. However, the former is limited in minimal network administration experience while the latter can expend the network freely. What’s more, a switch does not assign IP addresses, which is the job of a DHCP server, usually built into a router. PoE NVRs provide this service, while PoE switches don’t. The switch simply provides a data path between all of the devices connected to it.

Note: You cannot plug a POE switch into an NVR directly - it must be plugged into your network.

Visit http://arindamcctvaccesscontrol.blogspot.com/2014/11/poe-network-camera-in-global-market.html for more detail.

Tips of Hanwha PoE NVR 

By default, PoE NVRs are set to connect directly to IP cameras.  In cases where the PoE ports are connected to network switches, the NVR must be put in Manual mode.

In addition, the PoE ports are set to Isolated mode, where each device can only communicate only with the NVR and not each other.  This is a security feature to prevent rouge devices from accessing other devices on the network.  This will prevent a connected PC from accessing IP cameras for setup changes.

If you are uplinking non-camera devices, such as switches, media converters, PCs, etc., you must set the NVR to Manual mode.

From the setup menu of the NVR, navigate to System > System Management > Settings > Load Factory Default.

Select the Manual Setup Mode.  If you wish to save some of the settings to speed up setup, check the Not Included options of User, Camera, and/or Network as needed.

Click the Initialization button and wait for the NVR to reboot.

This Write ups published on safe secure magazine Feb 2019 issue.

Ethernet Splitter

Ethernet Splitter

An Ethernet splitter can split a single Internet connection so that two or more computers can connect to the Internet simultaneously. It can also create additional connections for other computers on a network, which can reduce the overall amount of cabling required to setup a network. Unfortunately, Ethernet splitters cannot resolve the network collision issues that may occur if the computers connected to the splitter are using the same network resources simultaneously.

The CAT 5E Ethernet splitter allows two separate devices to share the same Ethernet cable. Ethernet splitters are generally used in pairs, with one CAT 5E splitter at the outlet and another Ethernet splitter at the patch panel. This allows for several wiring configurations to connect more devices to your network. Primus Cable offers both Ethernet splitter adapters and pigtail type Ethernet splitters.

The Ethernet Splitter for 1x VOIP + 1x PC, Pigtail Type, 10/100 BaseT 1P/2J 07 splits the signal from one CAT 5E Ethernet cable among two RJ45 connections. This Ethernet splitter is ideal for both domestic and commercial applications. We have both type 7 and type 8 Ethernet splitter adapters. By utilizing this device, two computers can share one CAT 5E Ethernet port. If the router has only one RJ45 port, then an Ethernet switch will be required to run multiple PCs off one signal at the same time.

Our phone cable is commonly used for 10Base-T and 100Base-T networking, particularly for telephone and low speed data applications. We stock both phone cable for plenum and for riser applications. If your project involves installation in plenums or air spaces, the CAT 3 Bulk Cable, Plenum CMP Solid UTP 25Pair 24AWG, 1000, White is a wise choice.

This phone cable features 25 unshielded solid copper pairs in a 24 AWG diameter cable. This phone cable is ideal for indoor voice communications applications, and is supplied on a wooden spool. This CAT 3 phone cable is also easy to install with its color striped pairs.

Primus Cable provides a wide assortment of networking and telco tools for your installation project. EZ-RJPRO™ HD Ratchet Crimp Tool is the professionals’ choice when working with CAT 5E and CAT 6 RJ45 connectors. It also works well with EZ-RJ12/RJ11 connectors. This crimping tool functions as a wire cutter, stripper, and crimping tool all in one. The ratcheted straight action crimping motion ensures a uniform crimp every cycle. Features precision cast crimping dies for superior accuracy. 

How to Connect an Ethernet Splitter

Step 1 – Insert one end of the Ethernet splitter into the primary Ethernet port of the device that is providing the network connection (such as the cable/DSL modem or Internet router).

Step 2 – Insert the Ethernet cables from the devices to be connected (such as a computer, printer, or scanner) into the Ethernet splitter. Users often connect a printer and computer to the splitter in order to minimize the frequency with which network collisions occur while sharing the connection.

Step 3 – Test the connection of the devices on the splitter to ensure that they can connect to network resources.

How to Make an Ethernet Splitter

Step 1 – Procure the following materials: a short Ethernet cable, 2 x RJ45 keystone jacks, electrical tape, super glue, and crimp tool.

Step 2 – Crimp one end of the Ethernet cable so that the wire’s ends are visible. Leave the other end of the cable in-tact.

Step 3 – Follow the directions that come with the keystone jacks to open them, then place the wires from the Ethernet cable into the jacks to split the connection. Place the white and orange wires into Pin #1, the orange wire into Pin #2, the white and green wires into Pin #3, and the green wire into Pin #6. On the second keystone jack, place the white and blue wires into Pin #1, the blue wire into Pin #2, the white and brown wires into Pin #3, and the brown wire into Pin #6.

Step 4 – Glue the jacks to each other by the sides with super glue, then snap them together.

Step 5 – Wrap electrical tape around any exposed wires and begin using the new Ethernet splitter.

This diagram works in a half duplex mode which provides communication in both directions, but only one direction at a time. Under normal operation, each port is constantly sensing any traffic through its receiving pair of wire. As long as it can sense that data is being processed, it will not start sending data. The significance of this operation is to avoid collision where two ports are sending data at the same time, and due to this phenomenon, data will be discarded. When this issue is resolved by both computers, they will start to transmit at random amount of time. The circuit employs the method known as Carrier Sense Multiple Access / Collision Detecion (CSMA/CD) wherein it allows the devices to take turns using the signal carrier line. In this operation, the hub’s primary task is to allow each port to check the signal level of the line to determine whether someone is already using it. The device waits for a few seconds if it is in use, or it transmits otherwise.

PoE network camera in Global market

Development of PoE network camera in Global market

Since the launching of Power over Ethernet (PoE) standard, global enterprise are eager to utilize this emerging technology in just a few years. According the latest survey, in just six years from 2008 to now, the annual increasing rate of power equipment with PoE technology will reach 33%. In 2014, global market of power devices with PoE technology will be over $5.2 billion, compound annual growth rate will be 38%.

Along with the development of worldwide security market, users start to consider deploying some network cameras and other network security devices. Network surveillance based on PoE is more and more accepted by users and have great development.

PoE (Power over Ethernet) means keeping the current Ethernet cat-5 deployment, assure interface AP for wireless network security cameras and other IP signal devise based on IP signal, at the same time, it is able to power ac electric for those kinds of devices. PoE technology use one general Ethernet cable to transmit Ethernet signal and ac electrical source simultaneously, allowing power and date to be integrated into the same cable system. In the case of guaranteeing the construction cable safety, keep normal answer operation. PoE network camera use PoE technology to realize the network video surveillance, which has power device function to use direct current main provided by power device equipment to transmit to power device via twisted-pair.

Compared to normal network camera, PoE network camera has following advantages: apart from power the connected device through Ethernet cable, PoE reduce the investment cost, as a result, it decrease the overall the deployment costs to  organize the device based on IP infrastructure. Poe not only provide the need for installing wall power connection, which dramatically reduce the plug costs related supporting end devices but also install the network connection device on the place where is hard to deploy the local alternating current power supply, to some content, provide more flexibility. We can separate PoE network camera form power device end in the practice, which can be divide into two types, normal cameras and PoE adaptor. Front end has Ethernet switch for PoE power, and back end has PoE adaptor, which will transmit the twisted cable power to network camera for the working power. Because power device is able to identify the rate of power, when we use ups to power, the advantage of saving energy is more obvious.