Quick Answers
| Problem | Common cause | Fix |
|---|---|---|
| Internet slow on WiFi, fast on LAN | Weak signal or channel congestion | Use 5 GHz band or change WiFi channel |
| No internet light | ONT or cable fault | Power cycle ONT and router; reseat LAN cable |
| Frequent disconnects | Router overheating or outdated firmware | Move router to open area, update firmware |
Step 1: Restart the ONT and router
- Unplug both the ONT and the WiFi router.
- Wait 2 minutes, plug in the ONT first, then the router.
- Test speed on both LAN cable and WiFi.
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Step 2: Connect to the router admin page
- Connect to the Vianet WiFi network.
- Open a browser and go to
192.168.1.1. - Enter the credentials from the router sticker.
Step 3: Switch to 5 GHz and change the channel
- Go to Wireless Settings.
- Enable the 5 GHz band and give it a separate name (SSID).
- Set 2.4 GHz channel to 1, 6 or 11 — the least crowded.
Step 4: Check connected devices
- In admin page, open DHCP Clients list.
- Disconnect devices you do not recognize (possible password sharing).
- Change the WiFi password to a strong one if unknown devices are present.
Step 5: Update router firmware
- In admin page, go to System Tools > Firmware Upgrade.
- Click check for updates and confirm.
- Wait 3–5 minutes; do not unplug during update.
Step 6: Call Vianet support
- Call 01-5970711 (Vianet call center).
- Mention your customer ID and speed test results.
- Ask them to check the OLT port and line signal (RSL).
Troubleshooting
| Problem | Cause | Fix |
|---|---|---|
| Speed lower than plan at all times | Plan limits or line signal issue | Run speedtest.net with LAN cable, share results with support |
| WiFi drops at night | Neighbor interference | Change channel to 1/6/11 and enable auto channel selection |
| One device slow, others fine | Device issue, not connection | Forget network, rejoin; update device drivers |
Related product check
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FAQ
Q: What is Vianet’s default router password?
A: It is printed on the router sticker (often admin / admin). Never leave it default — change it in admin settings.
Q: Why is my Vianet internet slow at peak hours?
A: Shared bandwidth congestion in your area; request a higher plan or business plan for dedicated bandwidth.
Q: Can I use my own router with Vianet fiber?
A: Yes, configure it in bridge or PPPoE mode with your Vianet username and password, or ask support for credentials.