Knowledge analysis that requires special attention when installing and using a wireless bridge

Since all wireless bridge devices are powered by POE, it is extremely important to correctly connect POE power supply boxes, wireless bridges, IP cameras, etc.; wireless bridge devices are designed for outdoor rain and dust protection, and the corresponding parts of the network cable should be properly configured. Waterproof and dustproof treatment.

1. Do rain, dust, and insulation. The network cable connection part of the wireless bridge, POE and network camera needs to be protected from rain and dust. The connector part of the network cable and the wireless bridge generally needs to be wrapped with two or three layers of waterproof tape. Try not to expose the crystal head; network cable and network camera The connecting part also needs to be wrapped with two or three layers of waterproof tape or insulating tape; all power connector parts should be insulated as much as possible.

2. Installation and fixing of wireless bridge devices. When installing a wireless bridge, first fix the bracket. If the bracket is unstable, it will directly affect the stability of microwave signal transmission. When fixing the wireless bridge to the bracket, fix the wireless bridge firmly according to the fixing method in the figure below. When installing, because the surface of the bracket is relatively smooth, if the nut is tightened directly with a nut, it may take a long time, the outdoor rainwater The surface of the saturated stent will rust and the contact between the U-clamp and the bracket will be loose. When installing, it is necessary to put a rubber band on the bracket to make a close contact with the U-clamp.

The antenna of the device needs to be aligned during installation to ensure high sensitivity of the received signal and stable transmission signal. As shown below:

3. Control of network cable and length. To extend the distance between the wireless bridge and the power supply box or switch. There are two kinds of network cable options for CAT5e (Super Category 5) or CAT6 (Super Category 6) for network cable. Since the wireless bridge uses POE power supply, the network cable not only transmits data but also supplies power to the wireless bridge. Therefore, if the network cable is too long or the material is poor, it will be seriously attenuated. The connection between the wireless bridge and the POE should use CAT5e or above as much as possible (try to choose the brand network cable), and the length should be controlled within 25m. Note: Generally, using CAT5e or CAT6 cable to transmit 100m data means that the distance from the LAN port of the POE power supply box to the camera or switch is 100m (as shown in Figure 1); however, due to different field environments, the POE power supply box may be installed at a distance. In the Distribution Box that is far away from the monitoring center or the equipment room, use fiber transmission from the POE power supply box to the monitoring center or the equipment room (Figure 2).

(Figure 1)

Wireless network bridge and POE connection part of the network cable should not be too long, it is recommended to use CAT5e or CAT6 type cable, the length should not exceed 25m to avoid power shortage; POE and network cameras, switches, NVR and other devices connected to the network cable should not exceed 100m to avoid causing network Signal attenuation. Figure 2:

(Figure 2)

When the data transmission port of the POE is far away from the monitoring center or the equipment room (more than 100m), optical fiber transmission is recommended.

Currently, there are two main POEs recommended, one is a modular POE with an external DC power input, and the other is a voltage-regulated POE with an internal integrated transformer using an AC 220V voltage input (Figure 3). Special Note: Regardless of which POE is used, the interface definition is uniform. The network port labeled “DATA IN” on the POE can be connected to network cameras, switches, computers and other network devices, and the network marked “P + DATA OUT”. Be sure to connect the wireless bridge device. When connecting, you need to pay attention to avoid accidental burning of the device.

(Figure 3)

4. The correct connection of network devices such as wireless bridge, POE power supply box, network camera or switch. There are generally three interfaces on the POE power supply box: power interface (usually DC DC input), POE network port (only for RJ45 port connected to wireless bridge device), network port or LAN port (can be connected to any Ethernet based port) Network devices, such as: network cameras, switches, routers, computers, NVRs, etc.).

5. Network cable production standards and their types. The current production standards for network cables are generally produced in accordance with the definition of national standards. It is recommended to use the mainstream T568B class line standard to make the network cable. The standard is as follows:

T568B: white orange, orange, white green, blue, white blue, green, white brown, brown

The wireless bridge device adopts POE power supply. It is recommended to use the national standard T568B line sequence to make the network cable. Since all network devices are adaptive Ethernet ports, it is strongly recommended to use the national standard when connecting the wireless bridge device to the POE or the switch to connect the POE. T568B type straight-through line (that is, the two ends of the network cable are the line order of the national standard T568B).

6. Lightning protection. The wireless bridge device is generally installed in an outdoor open space, and needs lightning protection measures; the device itself has a built-in correct IP address for the wireless bridge. The wireless transmission system built by the wireless bridge uses a large number of IP addresses. In order to avoid the IP address conflict between the wireless bridge device and the IP address of other devices in the LAN, there are two main solutions: First, the independent network is divided. Separate the wireless transmission network formed by the wireless bridge from other networks (such as office network and server network), use one core switch separately; second, re-plan the device IP address. Divide the IP address of the wireless bridge device and the IP address of the network camera and hard disk recorder on different network segments.

Lightning protection circuit, lightning protection grounding terminal (GND) will be reserved outside the device. The correct lightning protection grounding method is: the pole of the fixed wireless bridge is generally equipped with a lightning rod. The grounding terminal of the wireless bridge needs to use a copper core wire (usually 4mm2) to connect with the lightning protection line to access the earth.

7. Feeder connector processing. For outdoor high-power bridge equipment, because the transmission distance is far away, an external antenna needs to be installed, and a feeder connection is needed between the antenna and the device. At this time, all the feeder connection equipment and the connector part of the antenna should be protected from rain and dust. It is necessary to wrap two or three layers of waterproof tape or insulating tape. Try not to expose the feeder connector part to the air.

The debugging of the wireless bridge device is based on the software interface of the IE browser to change or adjust the relevant parameters to achieve the best transmission effect. Since each wireless bridge comes with the corresponding software debugging manual, it will not be described again. Some problems will be explained before debugging.

1) Wireless bridge device debugging needs to enter the software debugging interface of the device through IE browser or third-party browser (such as 360 browser, Sogou browser, etc.). First, you need to change the IP address of the local computer to ensure that the IP address of the device is on the same network segment as the IP address of the local computer. The details are as follows: Open Control Panel→Network and Sharing Center→Change Adapter Settings→ Local connection ”→“Properties”→“Internet Protocol Version 4 (TCP/IPv4)” manually set the computer IP address.

2) After setting the IP address, enter the IP address of the device in the address bar of the browser. Since you enter the debugging interface of the bridge device for the first time, the browser may not directly pop up the login interface of the device after you type the device IP address. The main interface of the browser will display an English prompt (Press “Reboot” after all configurations to Enable new setting), as shown below:

For this phenomenon, there is no need to suspect a device problem or a computer problem. The reason for this kind of problem is generally the compatibility problem caused by using a third-party browser. In this case, you only need to click the mouse on the right side of the browser address bar to switch the browser mode (compatibility mode or speed mode).

3) Properly plan the IP address of the wireless bridge. The wireless transmission system built by the wireless bridge uses a large number of IP addresses. In order to avoid the IP address conflict between the wireless bridge device and the IP address of other devices in the LAN, there are two main solutions: First, the independent network is divided. Separate the wireless transmission network formed by the wireless bridge from other networks (such as office network and server network), use one core switch separately; second, re-plan the device IP address. Divide the IP address of the wireless bridge device and the IP address of the network camera and hard disk recorder on different network segments.

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