40

SB5100 Series Cable Modem User Guide

Home

Print

Exit

Introduction

Before You Begin

Installation & Configuration

FAQ

Cabling for Multiple Users

The SURFboard cable modem supports several multiple user configurations. Along with

an optional hub or router, it can serve as an Internet gateway for up to 32 computers.

Not all service providers support multiple user service. For information about multiple

user service, contact your cable service provider.

Ethernet and USB

You can connect the USB port on one computer and the Ethernet port on another

computer directly to the cable modem, as shown at top left.

Caution

You can connect a single computer to the USB port and from one to 31 remaining users

to an Ethernet hub, as shown at bottom left. You cannot connect more than

one computer to the cable modem through the USB port.

Do not connect

both

the Ethernet and USB cables to the same computer.

Cable outlet

Coaxial cable

Computer

USB cable

Ethernet crossover

cable

Computer

SURFboard

cable modem

Cable outlet

Coaxial cable

Computer

Ethernet hub

or switch

USB cable

Computer

Computer

Computer

Ethernet crossover

cable

Ethernet cable

SURFboard

cable modem

41

SB5100 Series Cable Modem User Guide

Introduction

Before You Begin

Installation & Configuration

FAQ

Home

Print

Exit

Ethernet

You can connect up to 32 computers to an Ethernet hub connected to a SURFboard

cable modem, as shown at left.

Cable outlet

Coaxial cable

Ethernet crossover cable

Ethernet hub

or switch

Computer

Computer

Computer

Ethernet cable

SURFboard

cable modem

42

Introduction

Before You Begin

Installation & Configuration

FAQ

42

SB5100 Series Cable Modem User Guide

Home

Print

Exit

Troubleshooting

If the solutions listed here do not solve your problem, contact your cable service provider. Before calling your service provider, try unplugging and

plugging in the cable modem power cord in the AC wall outlet to restart the cable modem. Restarting the cable modem may take 5 to 30 minutes.

Before calling your service provider, try pressing the reset button on the rear panel. Resetting the cable modem may take 5 to 30 minutes. Your

service provider may ask for the status of the front-panel lights as described in

“Front-Panel Lights and Error Conditions”

on page 44.

Problem

Possible Solutions

Green POWER light is off

Check that the power cord is properly plugged into the electrical outlet and the cable modem.

Check that the electrical outlet is working.

If the Standby light is on, the Internet connection is off. Press the Standby button to reconnect to the Internet.

43

Introduction

Before You Begin

Installation & Configuration

FAQ

43

SB5100 Series Cable Modem User Guide

Home

Print

Exit

Cannot send or receive data

Check the lights on the front panel. Note the first light from top to bottom that is off. This light indicates where

the error occurred as described in

“Front-Panel Lights and Error Conditions”

on page 44.

If all lights are off except the Standby light, the cable modem is in Standby mode. Press the Standby button to

reconnect your Internet service.

If you have cable TV, check that your TV is working and the picture is clear. If you cannot receive your regular

TV channels, your data service will not function.

Check the coaxial cable at the cable modem and wall outlet. Hand-tighten if necessary.

Check the IP address. Follow the steps in

“Verifying the IP Address in Windows 95, Windows 98, or Windows

Me”

on page 37 or

“Verifying the IP Address in Windows 2000 or Windows XP”

on page 38. Call your cable

service provider if you need an IP address.

Check that the USB or Ethernet cable is properly connected to the

cable modem

and your computer.

Problems related to unsuccessful

USB driver installation

Remove the USB driver. Follow the instructions in

one

of:

•

“Removing the USB Driver from Windows 98 or Windows Me”

on page 45

•

“Removing the USB Driver from Windows 2000”

on page 49

•

“Removing the USB Driver from Windows XP”

on page 54

Problem

Possible Solutions

44

Introduction

Before You Begin

Installation & Configuration

FAQ

44

SB5100 Series Cable Modem User Guide

Home

Print

Exit

Front-Panel Lights and Error Conditions

For more information about the lights, see

“Top and Front Panel”

on page 2.

Light

Turns Off During Startup If

Turns Off During Normal Operation If

Receive

The receive channel cannot be acquired

The receive channel is lost

Send

The send channel cannot be acquired

The send channel is lost

Online

IP registration is unsuccessful

The IP registration is lost

Power

The cable modem is not properly plugged into

the power outlet

The cable modem is unplugged or is in standby

mode. Press the Standby button