With the continuous development of wireless network technology, wireless network equipment has become a popular product, the most common wireless routers, wireless monitoring, wireless bridges, etc. Among them, wireless bridges are widely used in monitoring and are also important devices for monitoring wireless transmission. one. Especially the wiring is inconvenient. It is widely used where the built environment is not good. How to choose a good wireless bridge?

1. What is a wireless bridge?

As the name suggests, a wireless bridge is a bridge to a wireless network. They use wireless transmissions to bridge communications between two or more networks. Wireless bridges are divided into circuit-type bridges and data-type bridges from the communication mechanism. The circuit-type bridging wireless transmission mechanism adopts the PDH/SDH microwave transmission principle, and the interface protocol adopts the bridging principle. It has the characteristics of stable data rate and small transmission delay, and is suitable for multimedia network solutions. Works with 3G/4G. Interconnection of mobile communication base stations.

The data type bridge adopts the IP transmission mechanism, and the interface protocol adopts the bridging principle. It has the characteristics of flexible networking and low cost, and is suitable for network data transmission and low-level monitoring image transmission. It is widely used for various data based on pure IP architecture. network scheme.

Two, how to choose a wireless bridge

A wireless bridge is a wireless monitoring device that is widely used in the field of wireless monitoring. Although it is a wireless device such as a wireless AP wireless router, it is not used to build wifi, but to transmit video data wirelessly. Like the switch in wired monitoring, the wireless bridge is an important transmission device in wireless monitoring, and its importance is evident. There are many types of wireless bridges on the market, so people don't know where to choose, and how to choose the best quality.

3. Technical indicators that need to be considered when choosing a wireless bridge (users and users):

1. Working frequency

The wireless bridge has two operating frequencies, 2.4G and 5.8G, and the characteristics of the two bridges are different. Generally speaking, the 2.4G wireless bridge is the mainstream frequency band, with good compatibility and good diffraction ability, but poor anti-interference. The 5.8G wireless bridge is relatively clean, has better anti-interference ability, long transmission distance, but poor diffraction ability.

2. Transmission rate

The wireless bridge has many transmission rates, such as 150Mbps, 3000Mbps, 450Mbps, 600Mbps, 900Mbps, etc. The rate can be determined according to the wireless monitoring requirements.

3. Antenna

Antennas are important accessories for wireless bridges. It is used to send and receive wireless signals. Without an antenna, a wireless bridge cannot communicate. There are many types of antennas, and there are omnidirectional antennas directional antennas, the greater the antenna gain, the better the performance of the wireless bridge.

4. Power supply method

Because it is mainly used outdoors, such as reservoir forests, if there is no power wiring, other methods of power supply are required. Usually a bridge that supports PoE is best. Some of them are sparsely populated, and the forest protection areas are powered by solar and wind energy.

5. Safety

Wireless bridges and wireless routers are the same as wireless APs, you need to set a password or encrypt the wireless signal. Otherwise, there will be many terminal accesses, which will affect the wireless monitoring transmission.

6. Waterproof and heat-resistant

The wireless bridge mainly works outdoors, and the environment is changeable. The following rain, snow and high temperature, etc., the first requirement is waterproof, dustproof, heat-resistant and anti-condensation. For a qualified wireless bridge, "quality" is a must.

7. Stability

The stability of the wireless bridge is very important. If it is running normally, it will crash and the rate will slow down. So what is monitoring? This is related to the hardware of the wireless bridge, such as the chip motherboard memory cache, etc. Of course, in stable wireless bridges, it's also a sensible option if it's not done in later installations.

8. Transmission distance

Wireless monitoring projects need to be transmitted at different distances. Wireless bridges have many transmission distances. Some transmission distances are 1 to 3 kilometers, some transmission distances are 3 to 5 kilometers, some transmission distances are 5 to 10 kilometers, and some transmission speeds are more than 20 kilometers, which must be determined according to the monitored transmission distance. The maximum transmission distance of the wireless bridge should be greater than the monitoring transmission distance as much as possible.