Arris CM820 Cable Modem Status Lights
This article will explain the meaning of the status lights found on the Arris CM820 Cable Modem, a modem previously supplied for iiNet Cable services.
nbn HFC customers who signed up before 1 March 2017 may also have this model as an nbn Connection Box.
Status lights
Light | State | Meaning | |
Power | Off | No AC power supply. Please note that all other lights will be off if the modem has no power. | |
Green | Working AC power supply. | ||
DS | Off | There is no power or internet is not available. Troubleshoot no connection. | |
Green | Indicates ultra-high-speed downstream/download activity. We typically expect a green DS and US light for Cable connections. | ||
Yellow | Indicates high-speed downstream/download activity. Check your usage in Toolbox - if your Cable service is shaped, consider purchasing a Data Pack. If your service is not shaped, please call us on 13 22 58 for assistance. | ||
Flashing | If it remains flashing after the modem has finished booting up, check the coaxial cable connection. If the coaxial cable seems fine, please call us on 13 22 58 for assistance. | ||
US | Off | There is no power or internet is not available. Troubleshoot no connection. | |
Green | Indicates ultra-high-speed upstream/upload activity. We typically expect a green DS and US light for Cable connections. | ||
Yellow | Indicates high-speed upstream/upload activity. Check your usage in Toolbox - if your Cable service is shaped, consider purchasing a Data Pack. If your service is not shaped, please call us on 13 22 58 for assistance. | ||
Flashing | May indicate a signal issue if it remains flashing after the modem has finished booting up and the DS light is solid. Please call us on 13 22 58 for assistance. | ||
Online | Off | There is no power or internet is not available. | |
Green | Internet is available. | ||
Flashing | May indicate a provisioning issue. Please write down your Cable modem's Serial Number and CMAC number as printed on the sticker on the base of the modem (example) and call us on 13 22 58 for assistance. | ||
Link | Off | There is no power or no working connection to the yellow Ethernet port on the back of the modem. If something is plugged in, try a different Ethernet cable. | |
Green | Working 1000Mbps connection to the yellow Ethernet port on the back of the modem - typically indicates the recommended Cat6 or Cat5e Ethernet cable is being used. | ||
Yellow | Working 10/100Mbps connection to the yellow Ethernet port on the back of the modem - typically indicates an older Cat5 Ethernet cable is being used. We recommend Cat6 or Cat5e Ethernet cables for Cable broadband. | ||
Flashing | Activity on the device connected via Ethernet. |