A situation where a mobile operator's subscriber terminal doesn't provide stable coverage is one of the most common user complaints. Equipment owners often find that in one room the internet speed matches the stated plan speed, but through one wall the signal virtually disappears. This is understandably frustrating, especially if you're paying for a high-speed plan.
The problem rarely stems from a single, specific factor. It's usually a combination of physical limitations of radio waves, the technical characteristics of the device itself, and external interference. Understanding how signal propagation works in your home will help you resolve most issues without calling a technician.
In this article, we will take a detailed look at why a router Rostelecom The Wi-Fi signal is poor, and what steps need to be taken to stabilize the connection. We'll cover both software settings and the physical aspects of hardware placement.
Hardware limitations and transmitter power
The first thing to start troubleshooting is the technical specifications of the device itself. Providers often provide subscribers with entry-level equipment that is physically incapable of covering a large area. The antennas in these models have low gain, typically no more than 5 dBi. This is sufficient for a one-bedroom apartment, but for a multi-room home or a house with thick walls, the power is insufficient.
It is important to consider that many models, such as Sagemcom [email protected] 2804 or older versions Eltex NTU-RG-1401G, operate primarily in the 2.4 GHz band. This frequency range has high penetration, but low throughput and is highly susceptible to interference from neighboring networks. If your router doesn't support dual-band mode, it will perform poorly in an apartment building.
It's also worth considering the device's age. Electronic components degrade over time, and the radio module may lose its original performance. If the router is more than 5-7 years old, its performance may be significantly lower than stated at the time of manufacture.
- 📡 Low power of built-in antennas, which does not allow penetration of load-bearing walls.
- 📶 Lack of support for the modern standard Wi-Fi 5 (802.11ac) or Wi-Fi 6.
- ⚙️ The device's processor is weak and can't handle traffic encryption at high speeds.
⚠️ Please note: If you're using a device you received through a promotion several years ago, it's likely outdated. Modern gadgets use complex encryption protocols that older processors have a hard time processing.
The influence of layout and wall materials on the signal
The physics of radio wave propagation dictates its own strict requirements. A Wi-Fi signal is electromagnetic radiation, which weakens when passing through obstacles. The higher the signal frequency (for example, 5 GHz), the less effectively it passes through solid objects, although it provides higher speeds over short distances.
The greatest attenuation is caused by materials containing metal or reinforced structures. Concrete walls with metal reinforcement act as a Faraday shield, almost completely blocking the signal. Mirrors, foil insulation, and even aquariums filled with water can become a serious obstacle to wave propagation.
Placing the router in a niche, behind a TV, or inside a metal enclosure also critically reduces performance. Antennas must have a clear line of sight to the receiving devices, at least within the same room.
The table below shows approximate signal attenuation coefficients for various materials:
| Obstacle material | Degree of signal attenuation | Impact on speed |
|---|---|---|
| Wood / Drywall | Low | Minimum |
| Brick wall | Average | Reduction by 30-50% |
| Concrete with reinforcement | High | Critical fall |
| Mirror / Metal | Very high | Complete blocking |
Interference and air traffic congestion
In apartment buildings, the airwaves are oversaturated with signals. Every neighbor's router, Bluetooth headset, wireless mouse, and even microwave oven generates electromagnetic noise. This phenomenon is called interference. When multiple devices operate on the same or a close channel, they interfere with each other, resulting in lost data packets and reduced speeds.
This is especially noticeable in the 2.4 GHz band, where only 13 non-overlapping channels are available, of which only three (1, 6, 11) are truly usable. If your router automatically selects a channel used by five neighbors, you can't expect stable operation. The device will constantly try to out-speak its neighbors, wasting time waiting for the airwaves to clear.
To diagnose channel congestion, you can use special applications on your smartphone, for example, Wi-Fi AnalyzerThey display a frequency occupancy graph and help you select the least congested channel for configuring your router.
- 📉 Channel overlapping by neighboring access points.
- 📺 Operation of household appliances (microwave ovens, baby monitors) in the same frequency range.
- 📡 The presence of a large number of active Bluetooth devices nearby.
How does a microwave affect Wi-Fi?
Microwave ovens operate at 2.45 GHz, which is almost exactly the center of the 2.4 GHz Wi-Fi band. When turned on, they emit powerful bursts of radiation that can completely jam the wireless network for a few seconds, causing connection drops.
Software errors and the need for updating
A router's firmware is the device's operating system. Like any computer, it can have bugs that can cause memory leaks, processor overheating, or incorrect radio module operation. The manufacturer regularly releases updates to fix these bugs and improve connection stability.
If the router hasn't rebooted for a long time, errors may have accumulated in its RAM, causing slow performance. Furthermore, older firmware versions may not work correctly with new security standards or encryption types used by modern smartphones and laptops.
To update, you need to log into the device's web interface. This is usually done at 192.168.1.1 or 192.168.0.1In the menu, find the section responsible for system tools.
Update path: Maintenance → System Management → Firmware UpdateIn some cases, a full reset to factory settings helps (Reset). This removes all user configurations and returns the device to its out-of-the-box state. After this, the router must be reconfigured, which often resolves software conflicts.
☑️ Software diagnostics checklist
Incorrect frequency and power settings
Often, users or technicians leave default settings during installation that are not optimal for specific conditions. For example, the channel width may be set to automatic mode (Auto), which leads to constant parameter fluctuations and instability. Fixing the channel width can significantly improve the situation.
For the 2.4 GHz range, the optimal channel width is 20 MHzSetting the value 40 MHz In the noisy airwaves of an apartment building, this often produces the opposite effect: the speed is theoretically higher, but the number of errors and interference increases exponentially, and the actual speed drops.
It is also worth checking the transmission power setting (Tx Power). In some models, it may be set to medium or low by default to save energy or comply with radiation regulations. Increasing the power to 100% (High) can improve coverage.
⚠️ Note: Settings interfaces may differ depending on the router model (Sagemcom, Eltex, Huawei). Menu item names may vary, but the basics remain the same—look for the Wireless or WLAN section.
- 🔧 Forced channel width setting
20 MHzfor 2.4 GHz. - 📡 Manual selection of a free channel instead of the mode
Auto. - 🔋 Setting the maximum transmitter power (High).
Thermal throttling and equipment overheating
Routers are computers that operate 24/7. They generate heat, and if the cooling system (passive heatsinks and vents) can't cope, the device begins to overheat. Modern chips have protection: when critical temperatures are reached, the processor forcibly reduces its clock speed to prevent overheating. This phenomenon is called throttling.
Overheating causes the router to slow down, data packets to be lost, and the Wi-Fi signal to become intermittent. This often happens in the summer or when the device is exposed to direct sunlight or covered by objects (books or boxes) that block air circulation.
You can check for overheating by simply tactilely testing: if the router's casing is so hot that it's uncomfortable to hold, the device is uncomfortable. In such cases, it's recommended to provide additional airflow or even install a small USB fan for active cooling.
Can I put my router on a battery?
Absolutely not. The radiator creates a powerful upward flow of hot air, which overheats the device, and the radiator's metal casing shields the Wi-Fi signal.
Frequently Asked Questions (FAQ)
Will buying a new antenna for a Rostelecom router help?
Replacing the antenna can improve signal strength, but only if your model has removable antennas (with connectors). Most modern compact models have built-in antennas. Purchasing a signal booster (repeater) is often more effective than replacing the antenna.
Why does the internet work worse in the evening than during the day?
This is due to the increased load on the provider's network during peak hours (in the evening), when most neighbors start watching videos and playing online games. Radio interference also increases in the evening.
Should I buy my own router instead of renting one?
Yes, purchasing your own modern router with 5 GHz and Wi-Fi 6 support often solves 90% of the speed and coverage issues that arise with basic models from your provider.
How often should I reboot my router?
It's recommended to perform a scheduled reboot (unplug for 10 seconds and then plug it back in) at least once a week. This clears RAM and resets frozen network processes.