Quick Answers
| Problem | Common cause | Fix |
|---|---|---|
| Modem online light off | Cable signal issue or outage in area | Reseat coaxial cable and check outage status |
| WiFi connects but no internet | Modem needs restart or MAC bind issue | Restart modem, wait 5 minutes, then test |
| Very slow uploads | Coaxial signal (SNR) below standard | Ask support to check SNR and power levels |
Step 1: Restart the cable modem
- Unplug the modem power adapter.
- Wait 2 minutes.
- Plug back in and wait for all lights to stabilize (up to 5 minutes).
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Step 2: Check the coaxial cable
- Tighten the screw connector at the modem and the wall splitter.
- Check the splitter — too many splitters weaken the signal.
- Avoid bending the cable sharply near windows.
Step 3: Check the modem status page
- Open a browser and visit
192.168.100.1(cable modems) or192.168.1.1. - Look at the downstream/upstream power levels and SNR.
- If SNR is below ~30 dB or power is far from range, report it to support.
Step 4: Reset the modem
- Insert a pin in the reset hole for 10 seconds.
- Wait for reboot, reconnect WiFi.
- Re-enter the WiFi password shown on the sticker.
Step 5: Call Subisu support
- Call 01-5970750 (Subisu customer care).
- Give your account number and describe the modem light pattern.
- Ask for a signal (RSL/SNR) check from their side.
Troubleshooting
| Problem | Cause | Fix |
|---|---|---|
| Internet stops after rain | Water in cable line or connector | Request technician visit; avoid DIY outdoor cable work |
| Modem overheats and drops | Ventilation issue | Place modem upright in open space, clean dust |
| Only some sites load | DNS or routing issue | Set DNS 1.1.1.1 and 8.8.8.8 in modem settings |
Related product check
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FAQ
Q: Does Subisu support WiFi 6 routers?
A: Yes, if your modem supports it or you use your own router in bridge mode.
Q: How do I check Subisu outage in my area?
A: Call 01-5970750 or check their Facebook page; major outages are usually announced.
Q: Can I change my Subisu WiFi password?
A: Yes, log in at 192.168.100.1 or 192.168.1.1 with the sticker credentials and change under Wireless settings.