Many users of ISP equipment encounter a situation where older gadgets, CCTV cameras, or smart plugs stop detecting the wireless network. This is often caused by the combination of 2.4 and 5 GHz frequencies into a single network with a common name, which is standard for modern routers. Sagemcom And SercommSmart devices that only operate on low frequencies simply get "lost" and cannot connect to the access point.
The solution lies in manually configuring the router. You'll need to force the bands to be separated by creating a separate SSID for legacy devices. This will ensure stable operation of the entire smart home ecosystem and allow you to connect devices that don't support the standard. 802.11ac or axThis process requires careful attention, as firmware interfaces may differ.
In this article, we'll detail the steps for various terminal models. We'll cover security considerations, choosing clear channels, and interference elimination methods. Proper setup will help avoid bottlenecks in the congested airwaves of an apartment building.
Why separate the 2.4 and 5 GHz frequencies?
Modern routers use this technology by default. Band Steering, which automatically switches the client between bands. This is convenient for a smartphone, but detrimental for specialized technology. Internet of Things (IoT) devices often have a simplified Wi-Fi module that is physically unable to scan the 5 GHz band.
When you try to connect such a light bulb to a shared network, the router may try to force it to a high frequency where it simply can't see the signal. As a result, the setup process stalls. Separating networks solves this problem completely: you create an isolated environment. SSID_2.4G, which only includes compatible devices.
⚠️ Note: After separating the networks, the name of your primary network will change. You will need to reconnect all phones and laptops to the new access point with the corresponding suffix.
Additionally, offloading the 2.4 GHz band has a positive impact on speed. Most of your neighbors' routers, microwave ovens, and Bluetooth headsets operate in this band. By dedicating a dedicated channel, you reduce interference for critical devices.
Preparing to set up a Rostelecom router
Before making any configuration changes, you must ensure a stable connection to the admin panel. It is best to use a wired connection via LAN portto avoid connection interruptions while applying wireless network settings.
You will need your authorization details. They are located on a sticker on the bottom of the device. This is usually the address 192.168.1.1 or 192.168.0.1, as well as login and password (often admin/admin (or a unique code). If you've changed your password before and forgot it, you'll need to perform a factory reset.
☑️ Preparing for setup
Open any browser and enter the gateway's IP address in the address bar. After entering your credentials, you'll be redirected to the web interface. The interfaces may be classic (green and gray) or modern (black and blue), but the logic remains the same.
Instructions for Sagemcom and Sercomm routers
Equipment Sagemcom (models F.AST, RT) and Sercomm has the most common interface. After logging in, go to the section Settings (Settings) and select the item Wi-Fi network or Basic settings.
You need to find the option responsible for band aggregation. It may be called "Combine 2.4 and 5 GHz," "Smart Connect," or "Dual Band." Uncheck the box from this point. This action unlocks individual settings for each band.
Menu path: Settings -> Wi-Fi -> Basic -> Uncheck "Merge"You will now see two separate settings blocks. In the 2.4 GHz block, enter the network name (SSID), for example, HomeWiFi_2.4Select an encryption method. WPA2-PSK and set a complex password. Save the changes.
What should I do if the settings are not saved?
If the page simply reloads after clicking "Save," try switching browsers. Sometimes the cache in older versions of Internet Explorer or Safari can interfere with router scripts. Use Chrome or Firefox in incognito mode.
Don't forget to check that the 2.4 GHz radio module itself is enabled. Sometimes, after splitting, it remains in the "Disabled" status. Enable it and ensure that the operating mode is selected. 802.11 b/g/n mixed for maximum compatibility.
Setting up Eltex and Huawei terminals
Routers Eltex (NTU-2W, NTP-4W) are often found in new connections. Their interface is more restrictive. Go to the menu WLAN -> BasicHere you also need to find the "Enable 2.4G & 5G integration" checkbox and disable it.
For devices Huawei (HG8245 series and similar) the path may vary. Look for the tab WLAN -> 2.4G Basic Network SettingsIf the split option is not in the basic settings, try to find the tab WLAN Advanced.
It is important to set the channel width correctly. For the 2.4 GHz band, the optimal value is 20 MHzSetting the value 40 MHz or Auto In apartment buildings, this often leads to a drop in speed due to overlapping of neighboring networks.
| Parameter | Recommended value | Description |
|---|---|---|
| Channel Width | 20 MHz | Maximum stability and range |
| Mode | 802.11 b/g/n | Support for all types of devices |
| Security | WPA2-PSK (AES) | Reliable data encryption |
| Channel | 1, 6 or 11 | Non-overlapping channels |
Channel selection and interference elimination
After separating the networks, it's critical to select a clear channel. In the 2.4 GHz band, there are only three non-overlapping channels: 1, 6, and 11. The rest are intermediate channels and cause interference.
Use mobile apps to analyze the airwaves, for example, WiFi AnalyzerCheck which channels are the least crowded by neighbors. If all channels are clogged, choose the one with the weakest signal.
Automatic channel selection (Auto) doesn't always work correctly in Rostelecom routers. It may poll the airwaves infrequently and get stuck on a noisy frequency. Manual channel locking is a more reliable solution for stationary devices.
⚠️ Please note: Wi-Fi protocols and regulatory requirements are subject to change. Always check the documentation for your specific device or the manufacturer's website for current frequency plans and power limits.
Problems connecting smart devices
Even after separating networks, smart devices can still act up. The main reason is that they see two networks with similar names and get confused. Make sure that only 2.4 GHz Wi-Fi is enabled on the phone you're using when connecting.
Some devices require that mobile data (4G/LTE) be disabled on your smartphone during setup. Others won't work if the network name (SSID) contains Cyrillic characters or special symbols. Use only Latin characters and numbers.
It's also worth checking your router's operating mode. If it's set to "N Only" (802.11n only), very old devices (b/g standard) won't be able to connect. Set it to mixed mode. 802.11 b/g/n.
FAQ: Frequently Asked Questions
Will internet speed decrease after frequency division?
No, the overall bandwidth of your ISP's channel will not change. However, devices connected to the 2.4 GHz network will operate at speeds limited by this standard (a maximum of approximately 40-60 Mbps in real-world conditions), which is a technical limitation, not a result of configuration.
Is it possible to merge the networks back together?
Yes, you can always go back to your Wi-Fi settings, find the Smart Connect / Dual Band option, and enable it. All devices that know the password should automatically switch to the same network.
Why does my phone connect to 2.4GHz instead of 5GHz?
After separating the networks, they have different names. If you connect to a network ending in _2.4, your phone will only use that one. To use higher speeds, select a network ending in _5G or one without frequency specification (if you renamed the primary network).
Does channel setting affect Bluetooth performance?
Yes, Bluetooth operates in the 2.4 GHz band. Selecting the correct channel (1, 6, or 11) minimizes interference with wireless headphones, mice, and speakers, making the connection more stable.