A student in Zetland on a Telstra 100Mbps DSL plan suddenly had no internet — the Telstra gateway’s lights were out and no WiFi showed up. It’s easy to blame the provider or the line. We brought a DSL-capable router on-site, plugged it into the same phone socket, and it was online in minutes — proving the line and plan were fine. The real fault was the Telstra gateway itself: it kept restarting on its own.
When our DSL router synced on the same socket, the line lit up fine — so the fault sat on the gateway, not the DSL line or Telstra.
| DSL line | The router / gateway | |
|---|---|---|
| In this case | Fine | Faulty (reboot loop) |
| How to test | Plug a known-good DSL router into the same socket | Watch its lights: looping / never settling = bad |
| Quick clue | If a second router gets online on the same line, the line is fine and the original box is the problem. Test wired where you can, and give a suspect gateway a stable power outlet — unstable power can shorten a router’s life. | |
Root cause: the Telstra gateway had failed and was stuck rebooting — not the DSL line or the Telstra plan. We got the student back online the same visit on a DSL router and recommended replacing the dead gateway with a known-good unit on a stable power outlet.
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