How to check whether your modem is working correctly
To check whether your modem is working correctly, look at the lights on the front of your modem. The lights show whether your modem is receiving a signal and the status of your connection.
Find your modem below, and then look in the Lights column to see how the lights will appear when your modem is working correctly.
Wireless DSL modems (gateways)
SmartRG SR555
Lights
- Power: Solid green
- LAN 1,2,3,4: Solid or blinking green (if you’re using the internet)
Note Only lit if a device is directly connected through an Ethernet cable. - DSL (SR555): Solid green
- DSL1 (SR550 and 552): Solid green
- DSL2 (SR550 and 552): Solid green
- Internet: Solid or blinking green (if you’re using the internet)
SmartRG SR552
Lights
- Power: Solid green
- LAN 1,2,3,4: Solid or blinking green (if you’re using the internet)
Note Only lit if a device is directly connected through an Ethernet cable. - DSL (SR555): Solid green
- DSL1 (SR550 and 552): Solid green
- DSL2 (SR550 and 552): Solid green
- Internet: Solid or blinking green (if you’re using the internet)
SmartRG SR516ac
Lights
- Power: Solid green
- LAN 1,2,3,4: Solid or blinking green (if you’re using the internet)
Note Only lit if a device is directly connected through an Ethernet cable. - DSL: Solid green
- Internet: Solid or blinking green (if you’re using the internet)
- 2.4 GHz or 5.0 GHz: Blinking green (if you’re using the internet)
SmartRG SR505
Lights
- Power: Solid green
- LAN1,2,3,4: Solid or blinking green (if you’re using the internet)
Note Only lit if a device is directly connected through an Ethernet cable. - WLAN: Solid or blinking green (if you’re using the internet)
- DSL: Solid green
- Internet: Solid or blinking green (if you’re using the internet)
Wired DSL modems
SmartRG SR501
Lights
- Internet: Solid or blinking green (if you're using the internet)
- DSL: Solid green
- LAN: Solid or blinking green (if you're using the internet)
- Power: Solid green
SmartRG SR10
Lights
- Power: Solid green
- Link: Solid green
- Data: Solid or blinking green (if you’re using the internet)
- PC: Solid or blinking green (if you're using the internet)
Wireless cable modems (gateways)
Hitron 4582
Lights
- Power: Solid green
- Downstream: Solid blue
- Upstream: Solid blue
- Online: Solid green
- Ethernet: Blinking green (if you’re using the internet)
Note Only lit if a device is directly connected through an Ethernet cable. - 2.4 GHz or 5.0 GHz: Solid or blinking green (if you’re using the internet)
Hitron 3552
Lights
- Power: Solid green
- Downstream: Solid blue
- Upstream: Solid blue
- Online: Solid green
- Ethernet: Blinking green (if you’re using the internet)
Note Only lit if a device is directly connected through an Ethernet cable. - 2.4 GHz or 5.0 GHz: Solid or blinking green (if you’re using the internet)
ARRIS MG 5000
Lights
- Power: Solid blue
- DS: Solid blue
- US: Solid blue
- Online: Solid blue
- WiFi Solid or blinking blue (if you’re using the internet)
Pulse media gateway
(ARRIS DCX 3635-W)
Lights
- Power: Solid teal
- WiFi: Solid green
- Online: Solid yellow
Cisco 3825
Lights
- Power: Solid green
- DS: Solid green
- US: Solid green
- Online: Solid green
- Ethernet 1,2,3,4: Solid or blinking green (if you’re using the internet)
Note Only lit if a device is directly connected through an Ethernet cable. - Link: Solid or blinking green (if you’re using the internet)
Wired cable modems
Hitron CODA-45
Lights
- Power: Solid green
- Downstream: Solid blue
- Upstream: Solid blue
- Online: Solid green
- 1 or 2: Solid or blinking green (if you're using the internet)
Cisco 3010
Lights
- Power: Solid green
- DS: Solid green
- US: Solid green
- Online: Solid green
- Link: Solid or blinking green (if you’re using the internet)
Fibre Modem
SmartRG SR400
Lights
- Power: Solid white
- WAN: Solid or blinking white (if you’re using the internet)
- Internet: Blinking white (if you’re using the internet)
- 2.4 GHz or 5.0 GHz: Blinking white (if you're using the internet)
SmartRG SR516ac
Lights
- Power: Solid green
- Internet: Solid or blinking green (if you’re using the internet)
- WAN: Solid or blinking green (if you’re using the internet)
- 2.4 GHz or 5.0 GHz: Blinking green (if you're using the internet)
ADTRAN 834-5
Lights
- Online: Green
- Rebooting: blue/white
