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SURFboard Cable Modem SB4220 Series User Guide
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Introduction
Before You Begin
Installation & Configuration
FAQ
Troubleshooting
Glossary
License
Top and Front Panel
For added security, you can press the Standby button
(1) to suspend your Internet
connection. No data is transmitted or received and the Standby button lights. All other
lights turn off until you press the Standby button again.
The lights provide information about power, communications, and errors:
During normal operation, the Power, Receive, Send, and Online lights are on and the
Activity light flashes when the cable modem is transferring data.
Key Light
Flashing
On
2
Power
Startup diagnostics in progress
The cable modem is powered on
3
Receive
Scanning for a receive
(
downstream
) channel connection
The downstream channel is
connected
4
Send
Scanning for a send (
upstream
)
channel connection.
The upstream channel is connected
5
Online
Scanning for a network
connection
The startup process is complete
6
Activity
Transmitting or receiving data
Transferring a large amount of data
7
Standby
This light does not flash
Internet service is blocked because
the Standby button was pressed. If
this light is on, all other lights are off.
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1
3
4
5
6
7
The model number and Standby button position
on your cable modem may be different than in
the illustrations and screen images in this guide.
