The problem of unstable internet or "dead zones" in an apartment is familiar to many ISP subscribers. Users often encounter situations where the router has excellent reception in one room, but the signal disappears completely through two walls. This isn't always the ISP's fault; often the cause lies in the physics of radio wave propagation or improper equipment configuration.
Understanding how a wireless network works will help you improve your connection speed and stability. In this article, we'll cover the technical aspects of setting up your equipment. RT, Sagemcom And Eltex, which are most often provided by the provider, and we will consider methods of physically amplifying the signal.
Analysis of the current signal level and diagnostics
The first step to solving a problem should always be a thorough diagnosis. You can't blindly change settings without understanding the system's initial state. You need to determine where exactly the signal is weak and how much weaker it is compared to the immediate vicinity of the router. There are specialized apps for this, such as WiFi Analyzer or built-in utilities in smartphones.
Please pay attention to the indicator dBm, which displays the signal strength level. A value of -30 dBm indicates a perfect signal, while -80 dBm indicates the connection is about to drop. It's important to measure this parameter at different points in the room to build a mental coverage map.
⚠️ Please note: Signal strength readings may fluctuate briefly. To obtain reliable statistics, take measurements at different times of day, as neighboring routers may interfere during peak hours.
Use the diagnostic data to make decisions. If the signal is -45 dBm in one part of the house and -75 dBm in another, the problem is most likely physical obstructions. If the signal is weak everywhere, the transmitter itself or its antennas may be faulty.
Optimal placement of the router indoors
The physical location of the access point plays a critical role in coverage. Many users hide routers in cabinets, behind TVs, or place them on the floor in the corner of the room, which is a serious mistake. Radio waves penetrate poorly through metal surfaces, mirrors, and thick concrete walls with rebar.
The ideal location is considered to be the center of the apartment, located as high as possible. The device's antennas radiate primarily to the sides, forming a "donut" shape, so positioning the antennas vertically (upward) provides better horizontal coverage. If you live in a two-story house, it's best to place the router on the ground floor, under the ceiling.
Avoid proximity to sources of electromagnetic interference. Microwaves operating at 2.4 GHz, cordless phones, Bluetooth devices, and even aquariums can significantly interfere with the signal. Move the router at least 1-2 meters away from such objects.
Setting up the 2.4 GHz and 5 GHz frequency bands
Modern Rostelecom routers, such as Sagemcom F@st 2804 or Eltex NTU-2, support dual-band operation. Understanding the difference between them is key to a stable connection. Range 2.4 GHz It has a longer range and penetrates walls better, but it is heavily contaminated by noise from neighboring networks and household appliances.
Range 5 GHz It provides much higher data transfer rates and is virtually interference-free, but its range is significantly shorter and its ability to bypass obstacles is lower. If your goal is to cover a large area with multiple walls, 2.4 GHz may be preferable, despite the lower speed.
In the router settings via the interface 192.168.1.1 or 192.168.0.1 You can separate networks by giving them different names (SSIDs). For example, HomeWiFi_24 And HomeWiFi_5This will allow you to manually connect high-speed devices (TVs, consoles) to the 5 GHz band, and smart plugs and phones in distant rooms to the 2.4 GHz band.
| Parameter | 2.4 GHz band | 5 GHz band |
|---|---|---|
| Maximum speed | Up to 450 Mbps | Up to 1300+ Mbps |
| Penetration ability | High | Low |
| Interference level | High (neighbors, microwaves) | Short |
| Range of action | Up to 50 meters indoors | Up to 20-25 meters |
Why doesn't 5 GHz penetrate walls?
High frequency waves have a shorter wavelength, making them more susceptible to absorption by water (which is abundant in walls and plants) and reflection from hard surfaces.
Selecting a free channel and bandwidth
In apartment buildings, the airwaves are often oversaturated. Neighbors' routers operating on the same channel create a "mess," causing your device to lose data packets. There are only 13 channels in the 2.4 GHz band, and only three of them (1, 6, 11) don't overlap. Using automatic channel selection isn't always effective.
Download a WiFi analyzer to your smartphone and see which channels are the most congested. If all your neighbors are on channel 6, you might want to manually set your router to channel 1 or 11. To do this, find the "Channel 11" section in the web interface. Wireless or WLAN and change the parameter Channel With Auto on a specific date.
It's also worth experimenting with the channel width. The standard channel width for 2.4 GHz is 20 MHz. Setting it to 40 MHz theoretically doubles the speed, but in practice, in a noisy apartment building, this often leads to connection instability and a drop in speed. For 5 GHz, 40 or 80 MHz are safe to use.
☑️ Optimize WiFi channels
Firmware update and factory reset
A router's software is the device's operating system. Like computers, it can contain bugs that are fixed by developers. Factory firmware installed several years ago may not work correctly with new encryption standards or device types. Checking for updates is a mandatory step in optimization.
You can update the software automatically through the router menu if it is connected to the Internet, or manually by downloading a file from the manufacturer's official website (for example, Sagemcom or ZTE). Before the procedure, be sure to save your current settings if you are afraid of losing them, although they are usually saved when updating through the interface.
If your router is running slowly even after updates, a full factory reset will help. This will clear accumulated software junk and configuration errors. To do this, press the button Reset on the device body with a thin object for 10-15 seconds until the indicators flash.
⚠️ Note: After a hard reset, the router will return to its out-of-the-box state. You will need to re-enter your provider's login and password (PPPoE) and configure the WiFi network name. Make sure you have your Rostelecom contract handy.
Using repeaters and mesh systems
If the apartment's physical layout doesn't allow for good coverage with a single router (for example, a long hallway or three floors), the only solution is to expand the network. The simplest option is a repeater. It receives the signal from the main router and broadcasts it further. However, a repeater cuts the speed by approximately half.
A more modern and effective solution is Mesh systemsUnlike repeaters, they create a single, seamless network. You walk around your apartment with your phone, and the device automatically switches between nodes without interrupting the connection. Rostelecom often offers such solutions as part of its Smart Home plan or as a separate service.
When choosing equipment, pay attention to technology support 802.11ac (WiFi 5) or 802.11ax (WiFi 6). Old standards 802.11n are no longer able to provide comfortable speeds for modern streaming services and video calls, even if the channel is free.
Frequently Asked Questions (FAQ)
Why does my Rostelecom router get hot and turn off?
Overheating may be caused by poor ventilation (the router is placed on a soft surface or in a closed cabinet) or a faulty power supply. Try placing the device on a hard surface and clearing the ventilation holes of dust. If the problem persists, the power supply or the device itself may need to be replaced.
How do I access my router settings if I can't access 192.168.1.1?
Check if your computer or phone is connected to this router's network. Also try the address 192.168.0.1 or 192.168.10.1The exact address is often indicated on a sticker on the bottom of the device. Make sure your network card settings are set to obtain an IP address automatically.
Does the number of connected devices affect WiFi speed?
Yes, directly. The connection bandwidth is shared among all active users. If one device is downloading torrents or watching 4K video, others may experience a bandwidth shortage. Limit the speed for guests or disconnect unnecessary devices via the web interface.
Do I need to change the antennas on my router to improve the signal?
Replacing the stock antennas with more powerful ones (with higher gain, dBi) can help, but only if the router has removable antennas. However, this solution has its limitations: an excessively strong signal can cause intermodulation distortion. It's often easier and more effective to properly position the existing antennas.