Why choose 802.3bt PoE repeater as a network transmission extension solution?

In network networking applications, network repeaters are often used when the network transmission distance exceeds 100 meters. The function of the network repeater is mainly to extend the network transmission distance by amplifying, resending or forwarding the data signal. By cascading, the network repeater can extend the transmission distance to about 400 meters as far as possible.

Then, in the network networking system, what are the advantages of using network repeater equipment for long-distance transmission?

Advantages of network repeaters

1. Lower cost

A repeater is a simple and inexpensive interconnection device used to extend the network distance in a local area network environment. It operates on the physical layer of OSI. The repeater has the function of amplifying and regenerating the signal on the line, compensating for signal attenuation, and supporting long-distance communication.

2. Effectively extend the transmission distance

The Ethernet repeater supports up to 3 levels of cascading, which greatly expands the coverage of Ethernet and greatly extends the transmission distance. However, considering the signal and power attenuation, multi-stage cascading is generally not recommended.

3. Different communication rates can be used for each network segment

The network repeater supports all network ports, and each network segment can use different communication speeds and transmission media. For example, 10M Ethernet and 100M Ethernet can be interconnected.

4. High reliability

With network repeaters, when the network fails, generally only the interconnected network segments are affected, and other network segments will not be affected.

Application characteristics of PoE repeater

In the long-distance network transmission system, because wiring and power are inconvenient, in addition to solving the data transmission problem, the power supply of the equipment must be considered. With the PoE network repeater, users can expand and extend the existing network infrastructure without changing the existing network system or adding other accessories. It is an ideal network transmission distance extension solution.

In some places where it is not convenient to get power, such as outdoor monitoring, PoE network repeater can be used to output power from PoE power supply or PoE switch, and power back-end cameras, APs, network equipment, etc. while transmitting data, a network cable At the same time, it solves transmission and power supply problems, and facilitates networking.

Application of bt PoE equipment in outdoor monitoring network

For example, the all-gigabit 802.3bt PoE network repeater series independently developed by Tepu adopts high-power PoE power supply technology, which can extend 1000Mbps Ethernet signal and PoE power supply by 100 meters.

By obtaining the maximum 60W/90W PoE power from the 802.3bt PoE++ switch or power supply, the 802.3bt PoE network repeater provides 50~57V standard PoE power supply for camera, wireless AP, smart lighting and other terminal equipment, and the PoE power supply output power is the most ? Up to 58W/81W, effectively solving the problem of insufficient Ethernet transmission distance of 100 meters and power supply problems of high-power equipment, and can be widely used in smart communities, smart parks, smart transportation and other places.

Why adopt 802.3bt standard

Due to the IEEE802.3af/at standard, the PoE power consumption of the powered device (PD) is limited to 25.5W, which is only suitable for powering ordinary cameras and IP video phones. For more powerful devices, such as high-speed domes and cloud desktop integration The power is far from enough for computers, POS terminals, LED lights, etc.

In order to meet the demand of PD devices for greater power, the new IEEE 802.3bt (also known as PoE++ or 4PPoE) has revised the previous PoE and PoE+ specifications, which can extend the power level to 90W to meet the requirements of more high-power devices. Power requirements; 802.3bt can be backward compatible with 802.3at and 802.3af; a lower power 802.3at or 802.3af PD device can be connected to a higher power 802.3bt PSE, and can be provided by more than 4 pairs of CAT5E cables 90W power output.

IEEE 802.3bt PoE device can expand the power to 90W

In addition to providing more power for high-power PoE devices, the IEEE 802.3bt standard also introduces other functions. For example, it supports automatic classification.

Automatic classification is a new classification mechanism (optional) unique to high-power PoE. It allows the PD to transmit the effective maximum power consumption to the PSE so that the PSE can set the power budget to correctly match the required power (plus reserve power for channel loss and " "Safety" margin), thereby improving system efficiency.

802.3bt PoE repeater can automatically negotiate output power according to the power required by the device

For example, the one-in-two-out full Gigabit 802.3bt PoE repeater launched by Utepo, its PoE output can automatically detect the connected device, and automatically negotiate and allocate output power according to the power required by the device. When the total output power is insufficient, power is given priority to the first connected device to realize true smart power supply.

Due to the expansion of power, the launch of bt PoE devices has greatly expanded the application scenarios of PoE technology. At present, BT PoE technology has been extended from traditional WLAN, network monitoring, IP phone and other application scenarios to smart buildings, smart retail, IoT (Industrial Internet of Things), Skynet engineering and other scenarios, which are widely used, with low cost and convenient construction. , Stable power supply, high operation and maintenance efficiency.