How can I tell if my DSL modem is working properly?

DSL Modems

All DSL modems have a Power light, which should be solid. To determine ADSL network connectivity, check the DSL/ADSL/WAN light (varies by model). The light should be solid. All modems also have a LAN/Activity light, which should be solid/flashing depending on Internet activity. Some modems also have a Test light, which should remain off after reboot.