Light patterns, images, manuals and more helpful info for the Motorola SB4220 cable modem –
Modem Light Indicators
Flashing – Startup diagnostics in progress.
Flashing – Scanning for a downstream channel.
|Flashing – Scanning for an upstream channel.
On – Upstream channel is connected.
Flashing – Scanning for a network connection.
|Flashing or On – Transmitting or receiving data.
|This light turns on when the standby button is pressed and standby
mode is activated.
|Notes and Useful Information:
This modem has a standby button located on the top of the unit. When activated, the LED lights turn off (except the standby LED) indicating the ethernet and usb ports are disabled. Note: The cable connection to the service provider remains active.