Wireless network from Beltelecom, widely known under the brand ByFly, is the primary method of internet connection for millions of subscribers in Belarus. The technology operates on the standards of the IEEE 802.11, which ensure data transmission over a radio channel between the provider and user equipment. Understanding how the signal travels from the backbone node to your smartphone helps avoid common mistakes when placing a router.
The infrastructure is based on a GPON fiber-optic network that reaches directly to the user's apartment. A modem converts the optical signal into an electrical signal, which is then distributed over the air by a router. The critical quality factor is not only the transmitter power, but also the absence of physical obstacles in the path of the radio wave. This is why knowledge of the physical principles of signal propagation allows us to significantly improve the quality of communication without replacing equipment.
Modern subscriber terminals operate in two main frequency bands, each with its own characteristics of propagation and penetration through walls. Users often encounter situations where the speed advertised by the provider doesn't match the actual speed, and the cause lies precisely in the operating characteristics of the Wi-Fi module. Below, we'll take a detailed look at the technical aspects that affect the stability of your connection.
GPON technology and signal conversion
The foundation of Beltelecom's home network is technology GPON (Gigabit-capable Passive Optical Network). This is a passive optical network that requires no active power supply at the intermediate nodes between the PBX and your home. The signal is transmitted over a thin glass fiber at the speed of light, ensuring minimal latency and enormous channel throughput.
An optical terminal is installed on the subscriber's side ONT or a combination router, which converts light pulses into electrical signals that your devices can understand. Inside this device, complex data modulation and demodulation occurs. If you see a flashing indicator light, PON or Optical, this means that there is an active exchange of data packets with the provider's central node.
It's important to understand that fiber optics are not susceptible to electromagnetic interference, unlike copper cables. However, once the signal transitions to a Wi-Fi radio channel, it becomes vulnerable to interference. The Beltelecom router must constantly adjust the connection speed with each connected device, selecting the optimal data encoding method in real time.
⚠️ Caution: The fiber optic cable inside an apartment has a minimum bending radius. Bending the fiber at an angle less than 90 degrees can cause irreversible damage to the core and complete loss of signal, even if the router continues to glow.
Frequency ranges: 2.4 GHz vs. 5 GHz
Beltelecom routers issued to subscribers are most often dual-band, supporting standards 802.11n, 802.11ac and the newest Wi-Fi 6The 2.4 GHz band offers greater range and better penetration through solid walls, but it is heavily congested with neighboring networks and household appliances. Microwave ovens and Bluetooth headsets also operate in this spectrum, creating a welter of interference.
In contrast, the 5 GHz band offers significantly wider channels and less congestion. Data transfer rates here can reach gigabit speeds, but the signal range is significantly shorter. Higher frequencies are less able to bypass obstacles and attenuate faster when passing through concrete, so additional access points may be required to cover a large area.
When selecting a network from the list of available connections on your device, you may see one network name (if Smart Connect is enabled) or two different ones. In the first case, the router automatically decides where to send your phone based on signal strength and channel load. In the second case, you manually select the priority: speed (5 GHz) or range (2.4 GHz). For online gaming and 4K video, it's preferable to force a connection to 5G networks.
| Parameter | 2.4 GHz band | 5 GHz band |
|---|---|---|
| Penetration ability | High | Low |
| Maximum speed | Up to 150-450 Mbps | Up to 1200+ Mbps |
| Airtime congestion | Very high | Low |
| Range | Up to 40 meters (indoors) | Up to 20 meters (indoors) |
Setting up security and data encryption
Beltelecom's wireless network security is based on encryption protocols that prevent traffic interception and unauthorized access. The modern standard is WPA2/WPA3, which uses complex encryption algorithms AESOlder methods, such as WEP or WPA-TKIP, are considered obsolete and vulnerable to hacking, so their use in router settings is not recommended.
To access the router control panel, the address is usually used 192.168.1.1 or 192.168.0.1It's important to change the default administrator password, as the default combinations (admin/admin) are known to all attackers. You should also set up a guest network if you frequently have visitors—this will isolate their devices from your local network, where important files may be stored on a NAS or printers.
MAC address filtering allows you to create a whitelist of devices that are allowed to connect. Even if someone learns your password, they won't be able to access the network unless their physical address is listed as allowed in the router interface. This creates an additional, though not absolute, security barrier.
⚠️ Note: Beltelecom router interfaces (ZTE, Huawei, Sercomm) are updated periodically. The location of the security menu may vary depending on the firmware version, so please check the latest instructions on the provider's portal.
What is WPS and why is it better to disable it?
WPS (Wi-Fi Protected Setup) allows you to connect to a network with the press of a button, but this protocol has a vulnerability in its code that allows a brute-force attack to guess the PIN code within a few hours. For maximum security, it is recommended to disable WPS in your wireless network settings.
Optimizing placement and signal enhancement
The physical location of the Beltelecom router directly impacts coverage. The ideal location is considered to be the geometric center of the apartment, located 1.5–2 meters above the floor. Antennas should be oriented vertically, as most antennas have a "doughnut"-shaped radiation pattern, spreading perpendicular to the antenna axis. If the router is placed on the floor in an alcove or behind a TV, the signal will be shielded by metal and concrete.
To increase coverage in large apartments or houses with thick walls, a single access point may not be sufficient. In such cases, wireless technology is used. Mesh (mesh network) or the installation of repeaters. The mesh system allows for the creation of a single, seamless network where devices automatically switch between nodes without interrupting the connection, which is critical for VoIP telephony and video calls.
It's also worth paying attention to Wi-Fi channels. In the 2.4 GHz band, there are only three non-overlapping channels (1, 6, 11). If neighboring routers are using the same channels, collisions occur. Use mobile Wi-Fi analyzer apps to find a free channel and manually enter it in the router settings by selecting the "Shared" mode. Static instead of Auto.
☑️ Optimize your Wi-Fi signal
Troubleshooting and connection speed
If you're experiencing slow speeds or intermittent connection drops, the first step should be troubleshooting. You can check for packet loss using built-in operating system tools or the command line. Enter the command ping 8.8.8.8 -t in the Windows command line and monitor the response time (time). Sharp spikes (jitter) or packet loss (request timed out) indicate line problems or channel congestion.
A common cause of low speeds is a mismatch between your data plan and your hardware capabilities. If you have a 500 Mbps plan and your router only supports 802.11n, you won't get faster than 100-150 Mbps over Wi-Fi. It's also worth checking that you don't have any background downloads running on other devices that could be consuming your bandwidth.
If problems persist, it's a good idea to reset the router to factory settings and reconfigure it, eliminating software configuration errors. Sometimes updating the device's firmware can help, as it can add support for new standards or improve the stability of the radio module. Firmware updates can be found on the official website of the equipment manufacturer (ZTE, Huawei, Eltex).
For accurate speed measurements, use a wired connection to eliminate the influence of the radio channel. If the cable speed matches the plan's plan, but the Wi-Fi speed is low, the problem is with the radio or the wireless module settings. If the cable speed is also low, you should contact Beltelecom technical support to have the line checked.
⚠️ Important: When running speed tests through a browser, make sure your antivirus or firewall is not scanning traffic in real time, as this may artificially lower test results.
Frequently Asked Questions (FAQ)
How do I change the password on a Beltelecom Wi-Fi router?
You need to log into the router's web interface (usually 192.168.1.1), enter the administrator login and password, and then go to the section WLAN or Wireless -> SecurityIn the field WPA PreSharedKey or Password Enter a new password and save the settings. All devices will need to be reconnected.
Why does my router get hot and should I turn it off at night?
Heating of the router's case is normal for operating network equipment, as active computing processes occur within. Turning off the router at night isn't necessary; modern models are designed to operate 24/7. However, if problems are observed, a short power outage (10-15 seconds) can help reboot the system and clear the memory.
Can I use my own router instead of Beltelecom equipment?
Yes, you can use your router by connecting it to your provider's fiber-optic terminal (ONT) via a LAN cable. In this case, the Beltelecom terminal operates in bridge mode, while your router handles authentication (PPPoE) and distributes the Wi-Fi. This often provides a better signal and more customization options.
What does a flashing red LOS light mean?
Indicator LOS A red "Loss of Signal" light indicates a loss of optical signal. This could be caused by a damaged cable in the entryway, a power outage, or equipment failure at the provider's end. This issue cannot be resolved independently; a service technician will be required.