Connect/Disconnect threshold for the second B channel 89 89 89

9TROUBLESHOOTING AND MAINTENANCE

Checking the Basics

91

 

 

 

 

Monitoring LEDs 92

 

 

 

 

Monitoring the ALERT LED

92

 

 

 

Monitoring the ISDN LED

92

 

 

 

Monitoring the

 

 

 

 

 

B Channel LEDs

92

 

 

 

 

Monitoring the LAN Port Status LEDs

92

 

Troubleshooting Problems Indicated by LEDs

93

Evaluating Symptoms and Solutions

94

 

 

Finding More Information 100

 

 

 

Contacting Technical Support

100

 

 

 

Downloading Firmware to Your ISDN LAN Modem

100

Resetting the ISDN LAN Modem 100

 

 

Resetting the ISDN Modem Using a Telephone

100

Reviewing Statistics

101

 

 

 

 

Understanding System Statistics

101

 

 

Understanding ISDN Information

102

 

 

Understanding Current Call Information

102

Understanding Last Call Information 103

 

Understanding Service Provider Information

104

ANETWORKING PRIMER What is a network? 105 What is a LAN? 105 What is a WAN? 105

How does a LAN connect to a WAN? 106 What is a LAN modem? 106

What is ISDN? 106

How do different devices communicate with each other? 107 What is TCP/IP? 107

What is an IP Address?

108

What is a Subnet Mask?

108

Dynamic and Static IP Addresses 108

What is DHCP?

109

 

What is DNS?

109

 

What is NAT?

109

 

What are numbered and unnumbered links? 109

How is overall throughput determined? 109

BUSING THE CUSTOM WEB BROWSER

Custom Links

111

Using Favorites

112

Installing the Custom Internet Explorer Browser 112

vii

Page 7
Image 7
3Com 3C892 manual Troubleshooting and Maintenance