POE adapters and switches. Organization of network surveillance using PoE technology

POE switch is a device designed to supply power to IP cameras using a UTP cable, as well as combine them into local network. Unlike analog video systems, you will not need to lay power wires to each of the elements security complex, if you decide to buy a POE switch for video surveillance. This approach is not only truly convenient and saves a lot of money, but also greatly simplifies the design of a security system. This was achieved due to the fact that the POE network switch is capable of transmitting electricity through the same conductor that is used to broadcast the video signal. In this case, it is possible to completely avoid the occurrence of electromagnetic interference and distortion, which are often encountered when using combined wires. Depending on the size of the video system, you can always buy from us POE switch for video surveillance, with 4, 8, 16 or 24 RJ-45 network ports. With its help, you will be able to collect in one place and organize centralized management of all devices of the security complex, thereby increasing ease of use and efficiency in daily use.

POE switch

IP cameras that use a LAN for data transmission have received great development. At first glance, network POE switch for video surveillance are not much different from ordinary switches used to create a LAN between PCs. The main difference is the fact that in addition to simply transmitting data packets, it can perform the functions of supplying power to video cameras or recorders. Mainly food Power over Ethernet is used to create professional-level video systems. Where, because large quantity video equipment, it is more profitable to overpay and buy POE switch for video surveillance, rather than laying additional kilometers of wires.

Network POE switch

Almost every person who decides to create a modern digital system security. In order to select and buy POE network switches, you must take into account parameters such as the number external devices, output voltage and signal transmission frequency. Let's look at each of them next:

• Firstly, this is the number of devices that are planned to be connected. Any switch has a certain number of free ports, and if the total equipment exceeds the permissible limit, then you will either have to stop using it or buy a POE network switch for professional-level video surveillance.
• Secondly, you should take into account the network standard by which electricity is supplied. It could be Power over Ethernet IEEE 802.3, 802.3 af, 802.3u, 802.3ab or 802.3x. They differ in the frequency of signal transmission. If this criterion is not taken into account, you may end up with incompatible equipment that is not suitable for joint use.

POE switch price

For a network POE switch, the price is determined depending on the number of outputs for connecting IP cameras and the country of manufacture of the device. The most common models are those with 8, 16 and 24 ports. You can combine existing IP cameras into a single network, thereby gaining control over all premises. The country of manufacture is also important.. Devices manufactured under the CISCO, D Link, HP, HIQ or RVI brands differ high quality of its products, allowing you to buy POE switch, price whomwill be at an acceptable level level.

Buy POE switches at the best price

Online store FULL CONTROL I am pleased to offer my clients to buy POE switches at best price from the world's leading manufacturers of network equipment for security systems. Among our assortment you will always find models with 4, 8, 16 or 24 RJ-45 ports for direct connection, with which you can combine not only your existing video cameras, but also network NVR recorders into a single network.

PoE (Power over Ethernet) switch is a switch that uses the technology of transmitting data and power over the same wires, using twisted pair. Switches are necessary to connect several nodes of a computer network.

This is what a POE switch looks like, it is also called a switch (switch)

Computers are connected using an Ethernet cable to a switch. This device can receive and transmit data, determining its source and recipient and transmitting packets of information only to those nodes on the network for which they are intended. For this purpose, switches use switching tables— schemes for matching the MAC address of a computer on the network to a switch port. The switch that was just turned on has an empty table. When transmitting data over the network, it analyzes the MAC addresses of the sending device and enters them into a table located in associative memory. If the device then receives data assigned to a computer whose MAC address is in the table, the switch will send a signal only through the port associated with this node. The advantages of switches are high speed their work, unlike concentrators.

Using switches for video surveillance

Network video surveillance is used to organize video surveillance through the use of computer networks that allow data to be transmitted anywhere in the world.

The visual signal is recorded using IP cameras that transmit digitized data over networks using the IP protocol. Switches provide additional functionality for surveillance systems. Several cameras of a video surveillance system can be connected to a switch, which distributes digital data streams between output devices: computers, video servers, monitors, etc.

The most modern systems video surveillance uses managed switches that have an interface for setting the behavior of devices depending on the signals received by them, transmitting information in the event of alarm sensors triggering to certain network nodes, etc.

PoE technology and video switches

IN Lately technology has become widely used for organizing digital video surveillance systems.

Benefits of PoE:

• Simplification of the electrical system: absence of a large number of power cables stretched to all devices.
• Security: PoE switches convert 220V into the voltage needed to power cameras, usually 12V.
• Increasing the range to the powered device.
• Ability to shut down/reboot devices in the system remotely.
• Possibility of extensive management of devices on the network.

Video cameras that support PoE can be powered via an Ethernet cable. A video surveillance switch connected to the electrical network converts alternating current at constant required power. The same function can be performed by a PoE injector connected to a switch or directly to an outlet.

PoE injector circuit

A typical POE injector: a connector for connecting a power supply, a connector for connecting a LAN line and for transmitting a signal to a camera, already powered by POE

A typical injector has two ports: a device supporting the technology is connected to POE, and a computer/switch/router is connected to LAN.

Connection diagram of the injector to the system

The figure above shows that one switch, depending on the number of ports, can include several devices powered by Power over Ethernet technology. For equipment that does not support PoE, you can use splitters that convert the Ethernet signal into a digital data stream and an electrical power supply component.

Popular models of PoE video switches

Sigrand

The company produces products for video surveillance systems: IP cameras, switches (including with PoE), PoE floodlights, etc. In the SG-1 series, models have 6 Ethernet ports and provide power up to 60 V. The interesting thing about Sigrand’s equipment is that that the equipment can be connected in series in one line. This saves money and reduces the cost of consumables.

Diagram of building a network based on Sigrand equipment

Appearance of Sigrand POE switch

Building and testing the network before installation

Raisecom

The brand provides a wide selection of various equipment and switches that can be used in video surveillance systems. ISCOM series switches are distinguished by a large number of ports and the ability to remote control.

RAISCOM equipment can be integrated in different ways

Cisco

The company has big choice switches that can be used in industry. The devices are compact in size, energy efficient, and programmable. A well-thought-out API is used for programming. Cisco is a fairly common brand whose catalog includes high-quality equipment for industrial use. The company's quality is greatly inflated, and the price, as you know, always depends on this indicator.

There are many different other brands that are no worse or better (depending on how you look). It is better to make a choice according to technical specifications, appearance, installation method and location, as well as price. I would also recommend using reviews.

In the next article we will talk about POE injectors: how they differ from POE switches, what are the advantages and disadvantages.

Convenient networking in remote locations without the need to use power outlets

What is PoE?

PoE (Power over Ethernet) technology allows network switches to simultaneously transmit power and data over an Ethernet cable

PoE switch Access point power data

What are the advantages of PoE-enabled devices?

In the absence of PoE technology, you will have to choose: either run the power cable to the installation location of network devices, or install them near power outlets. PoE technology provides greater flexibility so you don't have to compromise when choosing where to install your network devices. PoE is an IEEE standard that will allow you to transmit data and current simultaneously low voltage over the network via an Ethernet cable. PoE greatly simplifies the process of installing access points, IP cameras, IP phones and other PoE-enabled devices in hard-to-reach and remote locations, as well as outdoors.

What are the advantages of using PoE technology?

Low infrastructure costs

One cable provides simultaneous data and power transmission. PoE solutions also require fewer power adapters.

Increased comfort of placement

The ability to eliminate the use of fixed power outlets allows for accommodation in challenging environments.

Centralized management

A centralized switch allows you to distribute power to all devices.

Simple
installation

Use your existing network infrastructure for quick deployment - no electrician required.

PoE and PoE+

PoE devices use the original PoE standard, IEEE 802.3af, which provides up to 15.4 W direct current for every device. The current IEEE 802.3at standard, also known as PoE+, provides up to 30 W of power per device.

PoE switch

IP phones (PoE enabled) Wireless access points
(with PoE support) IP cameras (PoE supported)

IP phone: 3-7 W Access Point: 8 W for a/g broadcast and up to 20 W for n IP camera: 7-10W PTZ cameras with drive: 15-25+ W

PoE switches from TP-LINK

TP-LINK PoE switches are designed specifically to operate using the PoE (802.3af) or PoE+ (802.3at) standard to supply power to network devices. The line includes managed and unmanaged PoE switches that allow you to transfer power and data over one cable. This feature will allow you to expand your network in areas where power outlets are not available.

Managed PoE switches

Active PoE+ switches deliver power through RJ 45 terminals using the existing data cable, ensuring that each port on the device has the power it needs to operate the equipment connected to it.

SFP module

We manufacture some switches with an SFP connector module, which allows you to transfer data not only over twisted pair, but also through optical fiber used in building IP systems. It greatly facilitates integration with related subnet equipment. When connecting an optical transmitter, the interaction distance for models with an SFP module can be increased to 20 km or more, while the data transfer speed is from 1 Gbit or more, depending on the model.

Advantages of PoE switches from HTV manufacturer

• We produce PoE switches that can be used not only indoors, but also outdoors - industrial PoE switches.
• The devices are equipped with automation that can detect the line connection and find the desired data exchange algorithm.
• Many models have 2 or more Uplink outputs for signal transit with speeds up to 1 GB.
• Wide range from budget to professional.
• Automatic detection required by devices power.

In the HTV catalog you will find managed and unmanaged PoE switches that operate in a wide temperature range with high port density and the required power. You can install it vertically or horizontally, as well as on a DIN bar.

You can consult on equipment or buy a switch with PoE ports for video surveillance in Moscow by calling 8-800-234-34-86 or through the website. The manager will help you figure it out if you have difficulty choosing the right model.