How to check short outages on cable internet

Your cable internet drops for a few seconds, then comes back before you can run a speed test. Video calls freeze, pages stop loading, or a game disconnects, but the connection seems normal again when you check it.

A speed test measures performance during the test, so it can miss brief interruptions. Use the Connection Stability test to watch response time, jitter, lost requests, and dropouts over a few minutes. Then compare Wi-Fi with a wired connection to narrow down where the problem is.

Check for short outages

1. Open Connection Stability on the device having trouble. If you can, connect that computer to the router with an Ethernet cable. This removes Wi-Fi from the first test.
2. Pause downloads, cloud backups, and video streams on the device. Ask others to avoid heavy internet use while you test, so extra traffic does not confuse the result.
3. Let the test run for its full few minutes. Note the times when you see lost requests, dropouts, or sharp changes in response time and jitter.
4. At the same time, try a simple task such as loading a new web page or staying in a call. Write down whether it freezes at the same time as the test result changes.
5. Repeat the test once on Wi-Fi, in the same room as the router if possible. If you have another device, check whether it also loses connection at the same time.

Write down the date, time, connection type, and which devices were affected. A short speed test can look normal between interruptions, so a timestamped stability test is often more useful when you contact your provider. For more on what a brief request failure can and cannot show, see how to catch internet disconnects that last seconds.

What the result means

Lost requests or dropouts appear during the interruption

The browser could not complete some requests to the test service at that moment. If your call or page also stalled, the timing supports a real connection problem. It does not prove the whole internet connection went down, or identify whether the cause is Wi-Fi, your router, the cable modem, or the provider.

Response time rises, but requests are not lost

The connection is responding more slowly rather than stopping completely. High jitter means response time varies from one request to the next. This can make calls or games feel uneven even when a page still loads. Repeat the test when the problem is happening, because a short spike may have another cause.

Wi-Fi has trouble, but Ethernet stays steady

The cable service may be working while the wireless link between your device and router is struggling. Distance, walls, interference, or the router can affect Wi-Fi without interrupting the cable connection itself.

Both Wi-Fi and Ethernet have trouble

If a wired device and several Wi-Fi devices lose connection together, the issue is more likely at the router, cable modem, or provider connection than with one device's Wi-Fi. A browser test alone cannot tell which one is responsible.

The test stays steady while an app disconnects

The connection may have recovered before the test noticed, or the app may have a separate problem. Run the test again during the next interruption. If only one app fails while other devices and sites work, check that app before assuming the cable service is down.

How to fix it

1. Check whether other devices are affected. Test a phone and another computer around the same time. If only one device drops, restart its network connection and check its Wi-Fi or Ethernet settings before changing the modem.
2. Compare Wi-Fi with Ethernet. Connect a computer to the router by Ethernet and repeat the test. If only Wi-Fi drops, check the router's location and try closer to it. On Windows 11, open Settings › Network & internet to see whether the connection is listed as Wi-Fi or Ethernet. On macOS, open System Settings › Network and select the active connection.
3. Check the cables and power. Make sure the Ethernet cable clicks securely into place and the modem and router power cables are firmly connected. Check the coaxial cable, the round cable that screws into the modem, for a loose connection, visible damage, or a sharp bend. Do not force a connector or pull on a cable installed by your provider.
4. Check the modem and router lights. Look for a change when the outage happens, such as the modem losing its normal online connection indicator. Light names and patterns vary by model, so check the device label or its manual rather than treating one color as universal.
5. Restart the modem and router. Follow your provider's restart instructions. If there are separate devices, restart them in the recommended order and wait several minutes for the modem to reconnect. Do not press a factory reset button, which can erase settings.
6. Check for a local service notice. If multiple devices lose service together, look for an outage notice from your provider or contact support. Share the times you recorded and say whether the same drop happened over Ethernet.

When it's the hardware

If the modem repeatedly loses its online connection, its power light changes, or the coaxial cable or connector is visibly damaged, contact your cable provider. Ask them to check the line and modem signal history, especially if the issue happens on wired and wireless devices at once. The provider can check the outside cable and signal levels, which a browser test cannot inspect.

If Ethernet stays stable but Wi-Fi drops on multiple devices, the router or its wireless settings may be the problem. If only one device fails on both Wi-Fi and Ethernet while other devices remain online, focus on that device's network adapter or software. Keep the test times and connection details together so support can compare them with modem records.