Establishing a stable wireless connection between two remote sites is often the only possible solution when fiber optic installation is economically impractical or technically impossible. In such situations, the equipment Ubiquiti Networks series AirMax has established itself as the industry gold standard, offering high throughput and reliability even in challenging, noisy environments.
Creating a link, or so-called "bridge," requires an understanding of the basic principles of radio communications and the correct approach to equipment configuration. Wireless Bridge Allows you to combine two local networks into a single infrastructure, providing transparent access to resources and the internet. Despite its apparent complexity, the setup process is logical and structured if you follow the steps in sequence.
In this article, we'll cover every step: from physical installation and initial setup to fine-tuning the signal. You'll learn how to avoid common mistakes, choose the right frequency range, and ensure maximum performance for your communication channel. Proper setup is the key to stable network operation for years to come.
Selecting equipment and planning the link
The first step is to select compatible devices. To establish a point-to-point connection, you will need two devices: one that will operate in the Access Point (access point), and the second one is in the mode Station (client). The most commonly used models are LiteBeam, PowerBeam or NanostationIt is important that both devices support the same protocol standard, for example, airMAX ac or newer airMAX 5.
It's important to assess the distance between objects and the line of sight in advance. For distances of up to 3-5 kilometers in urban areas, devices with an antenna gain of 13-16 dBi are usually sufficient. If the distance exceeds 10 km or the terrain is rugged, equipment with a narrower beam pattern and higher gain, such as 23-25 dBi, will be required.
⚠️ Caution: Do not attempt to bridge devices on different frequency bands (2.4 GHz and 5 GHz). They will physically fail to connect. Also, avoid mixing protocols. airMAX and standard WiFi in one link - this will lead to a drop in speed.
Planning also includes checking the frequency spectrum using a built-in spectrum analyzer or a mobile app. WiFimanThis will help you choose the least noisy channel. In densely populated areas, the 5 GHz band can be heavily congested, and choosing a "clear" frequency will be critical to success.
Preparing for setup and initial access
Before raising the antennas onto the masts, you need to perform the initial configuration of the devices on the ground. For this, you will need the included PoE injector, a patch cord, and a computer with a network card. Connect the cable from the device to the port. POE on the injector, and the port LAN connect to the computer.
Default equipment Ubiquiti has an IP address 192.168.1.20You need to manually enter a static address from the same subnet on your computer's network card, for example, 192.168.1.25 with a mask 255.255.255.0After this, enter the device's IP address in the browser's address bar.
When you first log in, the system will prompt you to create a new user or sign in with the default credentials. If the device is new, you will need to set an administrator login and password. Write down this information—without it, you will not be able to manage the device in the future. It is also recommended to update the firmware at this stage (firmware) to the latest current version via the web console interface.
☑️ Preparing for setup
After updating and changing the password, the device is ready for basic network role setup. Don't forget to reset the computer's network settings to "Obtain automatically" if you plan to connect it to the main network later.
Access Point Configuration
Now let's set up the first device that will broadcast the signal. In the interface, go to the tab WirelessIn the field Wireless Mode select a value Access Point. Next, you need to set the network name (SSID). It is recommended to use a unique name that does not contain personal information to prevent neighbors from trying to connect to your equipment.
In the frequency settings section (Channel Width) For maximum stability and noise immunity in the 5 GHz range, it is better to choose 40 MHz. The 80 MHz bandwidth provides higher speed, but is more susceptible to interference. Frequency (Frequency) it is better to fix it manually, choosing the value with the lowest noise level that you determined at the planning stage.
Be sure to enable encryption. Select the security type. WPA2-AES and set a complex access key. Without this, anyone within range will be able to intercept your traffic or use the channel for their own purposes. Transmission power (Output Power) on the access point side, you can leave it at maximum or reduce it to 20-24 dBm if the distance is short, so as not to “jam” the client device.
⚠️ Attention: Firmware interfaces airOS And UISP These may vary depending on the version. If you don't see a parameter, check the documentation for your specific software version, as functionality is constantly evolving.
After making all the changes, click the button Change, and then Save in the upper right corner of the interface. The device will reboot with the new settings. Make sure the "Ready for client connections" indicator is lit in the status bar.
Setting up a client device (Station)
The second device is configured in a similar way, but with a change in role. In mode Wireless Mode select Station (or Station Bridge, if you need to forward VLANs). In the list of available networks (Site Survey) find the SSID of your newly created access point and click Select.
Enter the security key you set on the access point. It's important to pay attention to the following setting: Output PowerOn the client side, it often makes sense to reduce the power, especially over short distances. An excessively strong signal from the client can blind the access point's receiver, causing intermodulation distortion.
To ensure connection stability, please disable this function. Auto-Connect to other networks, if active, and make sure the device is firmly bound to your access point's SSID. Also, check that the frequency and channel width match the settings on the AP side. After saving the settings (Save) the device will start the association procedure.
What is AirMax Precision?
AirMax Precision is a technology that allows for more precise antenna alignment by displaying detailed signal information directly on the device body or via a mobile app, speeding up installation.
If everything is done correctly, the connection status will show the value Connected, as well as signal strength and link quality indicators. Now we can move on to the physical installation.
Mounting and adjusting antennas
Physical installation requires precision. Mount the devices on the masts, ensuring a clear line of sight. Cables should be securely sealed with the included rubber caps and, preferably, additionally treated with waterproofing tape to prevent moisture from entering the connectors.
Alignment (pointing) is the most crucial step. Connect a laptop or use a mobile device with an app. Ui Pro or WiFiman near the antenna. You need to achieve maximum values Rx Signal (received signal level) and CCQ (channel quality). A signal in the range of -45 to -55 dBm is considered optimal.
Move the antenna slowly, a few millimeters at a time, waiting 5-10 seconds after each movement for the statistics to update. Avoid aiming for values above -40 dBm, as this may indicate receiver overload. It's better to have a 3-5 dBm margin than to operate at the sensitivity limit.
| Parameter | Value | Description |
|:--- |:--- |:--- |
| Rx Signal | -45...-65 dBm | Received signal power level. The closer to 0, the better. |
| CCQ | > 80% | Channel quality factor. Shows the percentage of successful packets. |
| Tx Rate | Depends on model | Current real-time data transfer rate. |
| Noise Floor | -90...-95 dBm | Ether noise level. An important parameter for assessing noise pollution. |
Optimization and troubleshooting
After the initial setup and antenna installation, final optimization is required. Check the actual throughput speed using the utility iperf3, running between two computers at opposite ends of the link. The actual speed is usually 60-70% of the declared physical speed of the radio interface.
If you experience speed drops or ping issues, try switching to a neighboring frequency. Changing the antenna polarization can sometimes help, but this requires physically reversing the antennas, which isn't always practical. Make sure there are no trees near the link that could sway in the wind and block the signal.
Turn on the function TDMA (if not enabled by default), which allocates time slots for data transmission, eliminating collisions. This is especially important for the protocol airMAXAlso, check the device logs for constant reconnections or authentication errors.
⚠️ Caution: Lightning can be fatal to equipment. Be sure to ground masts and use lightning arrestors on Ethernet cables running from outside to inside.
Regularly check the link status through the monitoring system. Modern devices Ubiquiti support sending SNMP traps or integration with the platform UISP for remote monitoring of network status.
Frequently Asked Questions (FAQ)
Can Ubiquiti devices be connected to other brands of equipment?
Technically, "Station WDS" or "Bridge" mode allows connection to some other devices that support standard WiFi protocols. However, the proprietary protocol airMAX Only works between Ubiquiti devices. If you connect to another brand, you'll lose the benefits of TDMA and stability, becoming a regular WiFi bridge.
What is the maximum range for the Ubiquiti WiFi bridge?
Theoretically, using powerful parabolic antennas of the series PowerBeam or Rocket With disks, distances of 50-80 km or more can be reached. However, for such distances, perfect visibility and professional link calculations, taking into account the curvature of the Earth, are critical.
Why does speed drop in rain or fog?
High frequencies (5 GHz and above) are subject to atmospheric attenuation. Small water droplets absorb radio waves. If the fade margin is too low, the link may be interrupted or the speed will drop during heavy rain. It's important to factor in a power reserve during the design.
Should the cable be shielded?
Yes, using a shielded cable (FTP/STP) and grounding the shield via a PoE injector (if it has a ground terminal) significantly increases the equipment's resistance to interference and static electricity, especially in winter.
How to reset Ubiquiti to factory settings?
Most devices have a reset button. When the power is on, press and hold it for more than 10 seconds (until the indicators flash). This will reset the device to IP 192.168.1.20 and its default settings.