For VoIP applications to work well - whether you're on a computer or mobile device - you need a stable internet connection. A weak Wi-Fi signal or an unstable wireless setup can lead to call issues that are often avoidable with a few adjustments.
This guide is designed for home users and small offices with a basic Wi-Fi router setup. As you try these recommendations, we suggest running your usual network testing tools to see how each change affects call quality.
Note: The goal isn’t necessarily to make your Wi-Fi faster, it’s to make it stable so your voice traffic can flow smoothly with no delays, no packet loss, and no interruptions.
Router positioning tips
| Action | Description |
|---|---|
| Routers work best in their intended orientation. Some should stand vertically, while others should lie flat. Check the manufacturer's recommendation or follow the device's natural design. |
| If your router has antennas, position them parallel to your computer or device. Experiment with different angles if walls or thick obstacles are present. |
| Metal, appliances, thick walls, furniture, and even fish tanks can weaken Wi-Fi signals. Keep the path between the router and VoIP devices as clear as possible. |
| Routers often perform best when placed on a high shelf or mounted on a wall. Avoid placing them on the floor, behind furniture, or inside cabinets. |
Router and device updates
| Action | Description |
|---|---|
| Routers often receive updates that improve performance and stability. Check the router’s settings or the manufacturer’s website for instructions. |
| Operating system and driver updates often improve wireless performance. |
| If your router is several years old, your internet provider may offer a newer model at no cost. |
| Newer Wi-Fi technology offers better range, stronger signals, faster processing, and improved performance under load. Reading reviews or consulting an IT professional can help you choose the right model. |
Network usage tips
| Action | Description |
|---|---|
| Devices that do not need to move, such as desktop computers, smart TVs, or office equipment, perform best when connected through Ethernet. If running a cable is not possible, consider powerline adapters that use your electrical wiring to extend the network. |
| Online gaming, 4K streaming, large downloads, and multiple video calls can saturate the network. If performance drops during peak activity, you may need a higher bandwidth plan or upgraded equipment. |
| Devices can switch to cellular data, a guest network, or a distant access point without warning. Verify that you are connected to the correct Wi-Fi network before making calls. |
Additional technical tips
Important: These tips are optional and may require help from an IT professional.
1 - Try switching between 2.4 GHz and 5 GHz
- 5 GHz usually offers better performance and less interference.
- 2.4 GHz travels farther and may work better if you’re far from the router.
Tip: Test both and compare call quality.
2 - Test Ethernet vs. Wi-Fi
If Ethernet works well but Wi-Fi doesn’t, the wireless network likely needs attention.
3 - Reduce channel congestion
Wi-Fi networks share “channels.” Too many devices using the same channel can cause interference. Your IT team can spread devices across non-overlapping channels to improve performance.
4 - Check signal strength (RSSI) and signal-to-noise ratio (SNR)
Good call quality typically requires:
- RSSI: −65 to −67 dBm
- SNR: At least 25 dB
| Metric | Good | Acceptable | Poor |
|---|---|---|---|
| RSSI | −65 dBm or better | −70 dBm | below −75 dBm |
| SNR | 25 dB+ | 20 to 24 dB | less than 20 dB |
Your IT team can measure these values and make adjustments if needed.
5 - Consider using an extender or repeater
Place the extender halfway between the router and where you need stronger coverage. Make sure:
- It’s not overloaded with high-traffic devices
- Its placement is high and unobstructed
- It’s wired into the router if possible (for best performance)
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