NETGEAR RT338 User manual

M-RT338NA-1
October 2000
NETGEAR , Inc.
4500 Great American Parkway
Santa Clara, CA 95054
USA
Reference Guide for the
Model RT338 ISDN Router
Frontmat.fm Page i Friday, October 6, 2000 5:15 PM

ii
© 2000 by NET EAR, Inc. All rights reserved.
Trademarks
NET EAR™ is a trademark of Netgear, Inc. Windows® is a registered trademark of Microsoft Corporation. Other
brand and product names are trademarks or registered trademarks of their respective holders. Information is subject to
change without notice. All rights reserved.
Statement of Conditions
In the interest of improving internal design, operational function, and/or reliability, NETGEAR reserves the right to
make changes to the products described in this document ithout notice.
NETGEAR does not assume any liability that may occur due to the use or application of the product(s) or circuit
layout(s) described herein.
Federal Communications Commission (FCC) Com liance Notice: Radio Frequency Notice
This device complies ith part 15 of the FCC Rules. Operation is subject to the follo ing t o conditions:
• This device may not cause harmful interference.
• This device must accept any interference received, including interference that may cause undesired operation.
Note: This equipment has been tested and found to comply ith the limits for a Class B digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance ith the instructions, may cause harmful interference to radio communications. Ho ever, there is no
guarantee that interference ill not occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, hich can be determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the follo ing measures:
• Reorient or relocate the receiving antenna.
• Increase the separation bet een the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to hich the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
EN 55 022 Declaration of Conformance
This is to certify that the Model RT338 ISDN Router is shielded against the generation of radio interference in
accordance ith the application of Council Directive 89/336/EEC, Article 4a. Conformity is declared by the application
of EN 55 022 Class B (CISPR 22).
Bestätigung des Herstellers/Im orteurs
Es ird hiermit bestätigt, daß das Model RT338 ISDN Router gemäß der im BMPT-AmtsblVfg 243/1991 und Vfg 46/
1992 aufgeführten Bestimmungen entstört ist. Das vorschriftsmäßige Betreiben einiger Geräte (z.B. Testsender) kann
jedoch ge issen Beschränkungen unterliegen. Lesen Sie dazu bitte die Anmerkungen in der Betriebsanleitung.
Das Bundesamt für Zulassungen in der Telekommunikation urde davon unterrichtet, daß dieses Gerät auf den Markt
gebracht urde und es ist berechtigt, die Serie auf die Erfüllung der Vorschriften hin zu überprüfen.
Certificate of the Manufacturer/Im orter
It is hereby certified that the Model RT338 ISDN Router has been suppressed in accordance ith the conditions set out
in the BMPT-AmtsblVfg 243/1991 and Vfg 46/1992. The operation of some equipment (for example, test transmitters)
Frontmat.fm Page ii Friday, October 6, 2000 5:15 PM

iii
in accordance ith the regulations may, ho ever, be subject to certain restrictions. Please refer to the notes in the
operating instructions.
Federal Office for Telecommunications Approvals has been notified of the placing of this equipment on the market
and has been granted the right to test the series for compliance ith the regulations.
VCCI-2 Statement
This equipment is in the 2nd Class category (information equipment to be used in a residential area or an adjacent area
thereto) and conforms to the standards set by the Voluntary Control Council for Interference by Data Processing
Equipment and Electronic Office Machines aimed at preventing radio interference in such residential areas.
When used near a radio or TV receiver, it may become the cause of radio interference.
Read instructions for correct handling.
Customer Su ort
For assistance ith installing and configuring your NETGEAR system or ith post-installation questions or problems,
contact your point of purchase representative.
To contact customer support or to purchase additional copies of this document and publications for other NET EAR
products, you can contact NET EAR at the following numbers:
• Phone:
Australia: 1800-787-638 Korea: 00308-11-0319
Austria: 00800-06384327 Netherlands: 0800-023-0981
(00800-0-NET EAR) New Zealand: 00800-1233-4566
Denmark: 808-82179 Norway: 800-12041
Canada: 1-888-NET EAR Singapore: 001-800-1233-4566
Finland: 0800-111-036 Sweden: 0200-298-298
France: 0800-77-17-53 Switzerland: 00800-0638-4327
ermany: 00800-06384327 (00800-0-NET EAR)
(00800-0-NET EAR) United Kingdom: 020-7216-0014
Hong Kong: 001-800-1233-4566 United States: 1-888-NET EAR
Japan: 0120-66-5402 All Other Countries: [phone]
World Wide Web
NETGEAR maintains a World Wide Web home page that you can access at the universal resource locator (URL)
http:// .NETGEAR.com. A direct connection to the Internet and a Web bro ser such as Internet Explorer
or Netscape are required.
Frontmat.fm Page iii Friday, October 6, 2000 5:15 PM

iv
Frontmat.fm Page iv Friday, October 6, 2000 5:15 PM

Contents v
Contents
Preface
Purpose ...........................................................................................................................xix
Audience ..........................................................................................................................xix
Conventions ..................................................................................................................... xx
Special Message Formats ......................................................................................... xx
Use of Enter, Type, Press, and Click ........................................................................ xx
Other Conventions ....................................................................................................xxi
Related Publications ........................................................................................................xxi
Chapter 1
Introduction
About the Router ............................................................................................................1-1
Features .........................................................................................................................1-1
Key Features ............................................................................................................1-2
ISDN Support ...........................................................................................................1-3
Multilink PPP Support ..............................................................................................1-4
TCP/IP Support ........................................................................................................1-4
IP Address Masquerading by Dynamic NAT+ ....................................................1-4
Port Forwarding with NAT ..................................................................................1-4
Automatic Configuration of Attached PCs by DHCP .........................................1-4
DNS Proxy .........................................................................................................1-5
Security ....................................................................................................................1-5
Calling Line Identification ...................................................................................1-5
PAP and CHAP Authentication ..........................................................................1-5
Callback .............................................................................................................1-5
Management Support ..............................................................................................1-6
RT338TOC.fm Page v Friday, October 6, 2000 5:16 P

vi Contents
Basic Router Concepts ...................................................................................................1-6
What is a Router? ....................................................................................................1-6
Routing Information Protocol ....................................................................................1-7
IP Addresses and the Internet .................................................................................1-7
Netmask ...................................................................................................................1-9
Subnet Addressing .................................................................................................1-10
Private IP Addresses ..............................................................................................1-12
Single IP Address Operation Using NAT ................................................................1-12
MAC Addresses and Address Resolution Protocol ................................................1-14
Domain Name System Server ...............................................................................1-14
IP Configuration by DHCP .....................................................................................1-15
Chapter 2
Installing and Connecting the Router
Package Contents ..........................................................................................................2-1
Local Network Requirements .........................................................................................2-2
Hardware Requirements ..........................................................................................2-2
Software Requirements ............................................................................................2-2
Router Description ..........................................................................................................2-3
Connecting the Serial Cable (Optional) ....................................................................2-6
Connecting to the ISDN Port ....................................................................................2-6
Connecting the Ethernet Cable ................................................................................2-6
Connecting the Model RT338 Router to a Single PC ........................................2-6
Connecting the Model RT338 Router to a Hub or Switch ..................................2-7
Connecting a Telephone, Fax Machine, or Modem ..................................................2-7
Connecting the Power Adapter ................................................................................2-7
Verifying Power ........................................................................................................2-8
Chapter 3
PreparingYour Network
ISDN Services Checklist .................................................................................................3-1
ISP Checklist ..................................................................................................................3-2
Single-User Account ................................................................................................3-2
LAN Account ............................................................................................................3-3
Account Information .................................................................................................3-3
Installing TCP/IP .............................................................................................................3-4
RT338TOC.fm Page vi Friday, October 6, 2000 5:16 P

Contents vii
Configuring TCP/IP .........................................................................................................3-4
Selecting IP Addresses forYour Network .......................................................................3-5
Connecting for Configuration ..........................................................................................3-6
Connecting Through a Serial Port ............................................................................3-6
Connecting with Microsoft Windows HyperTerminal ..........................................3-7
Reconnecting with Microsoft Windows HyperTerminal ....................................3-11
Connecting Through a Telnet Connection ..............................................................3-12
Chapter 4
Initial Router Configuration
Configuration Methods ...................................................................................................4-1
Using the FirstGear Router Configuration Utility ............................................................4-2
Installing FirstGear ...................................................................................................4-2
Choosing Between the Setup Wizard and Advanced Setup ....................................4-3
Starting FirstGear .....................................................................................................4-3
Reading the Current Configuration ..........................................................................4-4
Using the Manager Interface Configuration Method .......................................................4-4
Turning On Power to the Router ...............................................................................4-4
Navigating the Manager ...........................................................................................4-5
Manager Menu Summary ........................................................................................4-6
General Setup Menu ................................................................................................4-7
ISDN Setup Menu ....................................................................................................4-8
ISDN Advanced Setup Menu .................................................................................4-10
Ethernet Setup .......................................................................................................4-12
General Setup Menu .......................................................................................4-12
TCP/IP and DHCP Setup ................................................................................4-12
Setting the Manager Password ..............................................................................4-16
Chapter 5
Using FirstGear to Configure Internet Access
Configuring Internet Access with the Wizard ..................................................................5-1
Entering the ISDN Line Information .........................................................................5-2
Initializing ISDN and Performing the Loopback Test ................................................5-3
Setting ISP Parameters ............................................................................................5-4
Performing the ISP Connection Test ........................................................................5-6
Completing the Configuration ...................................................................................5-7
RT338TOC.fm Page vii Friday, October 6, 2000 5:16 P

viii Contents
Using Advanced Setup ...................................................................................................5-8
Advanced Setup .......................................................................................................5-8
Menu Bar Commands ............................................................................................5-11
General Tab .....................................................................................................5-12
ISDN Tab .........................................................................................................5-13
ISDN Advanced Features Tab .........................................................................5-15
Ethernet Tab ....................................................................................................5-17
Remote Node Tab ............................................................................................5-19
Selecting PPP Detail on the Remote Node Tab ........................................5-23
Selecting TCP/IP Detail on the Remote Node Tab ....................................5-25
Static Routes Tab .............................................................................................5-27
Chapter 6
Using the Manager Interface to Configure Internet Access
Information Checklist ......................................................................................................6-1
Configuring Internet Access ...........................................................................................6-2
Configuring for Local Servers with NAT ..........................................................................6-4
Local Web and FTP Server Example ................................................................6-5
Local Game Host or Videoconference Example ................................................6-6
Backup ISP Accounts .....................................................................................................6-7
Configuring for a Backup ISP ...................................................................................6-7
Switching to a Backup ISP .......................................................................................6-9
Chapter 7
Remote Node Configuration
LAN-to-LAN Application ..................................................................................................7-2
Remote Node Setup .......................................................................................................7-2
Editing PPP Options .......................................................................................................7-7
Bandwidth on Demand ...................................................................................................7-9
Editing IP Options .........................................................................................................7-10
Editing Filter Sets .........................................................................................................7-12
Setting Static Routes ....................................................................................................7-14
RT338TOC.fm Page viii Friday, October 6, 2000 5:16 P

Contents ix
Chapter 8
Configuring Dial-In Access
Setting Up Default Dial-In Access ..................................................................................8-2
Setting Up Dial-In Users .................................................................................................8-5
RADIUS Authentication ..................................................................................................8-8
RADIUS Server Configuration ..................................................................................8-8
RADIUS Client Configuration ...................................................................................8-9
The Key Field .........................................................................................................8-10
Adding Users to the RADIUS Database .................................................................8-10
Using RADIUS Authentication for CLID .................................................................8-11
Chapter 9
Configuring Filters
Router Filter Structure ....................................................................................................9-2
Configuring a Filter Set ...................................................................................................9-2
Configuring a Filter Rule .................................................................................................9-5
TCP/IP Filter Rule ....................................................................................................9-5
Generic Filter Rule ...................................................................................................9-7
Applying a Filter Set .......................................................................................................9-8
Reducing Unnecessary Calls by Microsoft Windows ......................................................9-9
Diagnosing the Situation ..........................................................................................9-9
Implementing the Filter ...........................................................................................9-11
Applying the Filter ..................................................................................................9-14
Chapter 10
Advanced Phone Features
Setting Up Supplemental Phone Service .....................................................................10-1
Call Waiting ............................................................................................................10-2
Three Way Calling ..................................................................................................10-3
Call Transfer ...........................................................................................................10-4
Call Forwarding ......................................................................................................10-4
RT338TOC.fm Page ix Friday, October 6, 2000 5:16 P

xContents
Chapter 11
System Maintenance
System Status ..............................................................................................................11-1
System Information ................................................................................................11-4
Terminal Baud Rate ......................................................................................................11-5
Log and Trace ...............................................................................................................11-6
View Error Log .......................................................................................................11-6
UNIX Syslog and Accounting .................................................................................11-7
Diagnostic Menu ...........................................................................................................11-9
Call Testing and TCP/IP Tools ..............................................................................11-10
System Tools ........................................................................................................11-12
Back Up and Restore Configuration ...........................................................................11-12
Backing Up and Restoring the Configuration with a Serial Connection ...............11-12
Backing Up and Restoring the Configuration Using TFTP ...................................11-13
Software Update .........................................................................................................11-14
Updating Router Software Using a Serial Connection .........................................11-14
Updating Router Software Using TFTP ................................................................11-15
Using Command Interpreter Mode .............................................................................11-15
Configuring Call Control .............................................................................................11-16
Configuring the Blacklist .......................................................................................11-16
Configuring Budget Management ........................................................................11-16
Viewing Call History .............................................................................................11-17
Setting Call Control Parameters ...........................................................................11-17
Configuring the Manager Password ...........................................................................11-18
Chapter 12
Troubleshooting
Basic Functioning .........................................................................................................12-1
PWR LED ...............................................................................................................12-1
Test LED .................................................................................................................12-2
LAN Link LED .........................................................................................................12-2
Troubleshooting the ISDN Line .....................................................................................12-2
ISDN Initialization or Reset ....................................................................................12-3
ISDN Loopback Test ...............................................................................................12-3
RT338TOC.fm Page x Friday, October 6, 2000 5:16 P

Contents xi
Troubleshooting a TCP/IP Network Using a Ping Utility ...............................................12-4
Testing the LAN Path toYour Router ......................................................................12-4
Testing the Path fromYour PC to a Remote Device ...............................................12-5
Troubleshooting a Remote Node or ISP Connection .............................................12-5
Troubleshooting a Remote User Connection ................................................................12-8
Troubleshooting Multilink Operation ..............................................................................12-8
Troubleshooting Internet Applications .........................................................................12-10
Troubleshooting the Manager Interface ......................................................................12-11
Testing the Phone Ports .............................................................................................12-11
Restoring the Default Configuration and Password ....................................................12-12
Appendix A
Technical Specifications
General Specification .................................................................................................... A-1
Appendix B
ConfiguringWindowsTCP/IP
Configuring Windows 95 or Windows 98 for IP Networking ........................................... B-1
Configuring TCP/IP Properties by DHCP ................................................................ B-2
Configuring TCP/IP Properties Manually ................................................................ B-3
Verifying TCP/IP Properties .................................................................................... B-4
Appendix C
Ordering ISDN Lines
Ordering the Line ...........................................................................................................C-1
Provisioning for Switches in North America ...................................................................C-2
Provisioning for AT&T 5ESS Switch ........................................................................C-3
Provisioning for Northern Telecom Switch ..............................................................C-5
Supplemental Voice Services ..................................................................................C-6
Appendix D
ISDN Clearing Codes
Clearing Codes ..............................................................................................................D-1
RT338TOC.fm Page xi Friday, October 6, 2000 5:16 P

xii Contents
Appendix E
Using the Protocol Analyzer and TraceTools
The Diagnostic Process ................................................................................................. E-1
ISDN Protocol Analyzer ................................................................................................. E-2
Packet Tracing ................................................................................................................ E-5
Packet Trace Display Format ................................................................................... E-8
Glossary
Index
RT338TOC.fm Page xii Friday, October 6, 2000 5:16 P

Figures xiii
Figures
Figure 1-1. Three Main Address Classes ...................................................................1-8
Figure 1-2. Example of Subnetting a Class B Address ............................................1-10
Figure 1-3. Single IP Address Operation Using NAT ................................................1-13
Figure 2-1. Front Panel of Model RT338 Router ........................................................2-3
Figure 2-2. Rear Panel of Model RT338 Router .........................................................2-5
Figure 3-1. HyperTerminal Window and Connection Description Dialog Box .............3-7
Figure 3-2. HyperTerminal Connect To Dialog Box ....................................................3-8
Figure 3-3. COM Port Properties Dialog Box .............................................................3-9
Figure 3-4. Router Password Prompt in HyperTerminal Window .............................3-10
Figure 3-5. Router Main Menu in HyperTerminal Window ........................................3-11
Figure 4-1. Start-up Display .......................................................................................4-4
Figure 4-2. Manager Main Menu ................................................................................4-6
Figure 4-3. Menu 1 - General Setup ...........................................................................4-7
Figure 4-4. Menu 2 - ISDN Setup ...............................................................................4-8
Figure 4-5. Menu 2.1 - ISDN Advanced Setup .........................................................4-10
Figure 4-6. Menu 3 - Ethernet Setup ........................................................................4-12
Figure 4-7. Menu 3.2 - TCP/IP and DHCP Ethernet Setup ......................................4-13
Figure 4-8. Menu 23 - System Security ....................................................................4-16
Figure 4-9. Menu 23 - System Password .................................................................4-16
Figure 5-1. Internet Access Wizard ISDN Line Setup Window ...................................5-2
Figure 5-2. Internet Access Wizard ISP Parameters Window ....................................5-4
Figure 5-3. Internet Access Wizard ISP Test Complete Window ................................5-7
Figure 5-4. Advanced Setup Window .........................................................................5-9
Figure 5-5. General Tab ............................................................................................5-12
Figure 5-6. ISDN Tab ................................................................................................5-13
Figure 5-7. Advanced ISDN Features Tab ................................................................5-15
RT338LOF.fm Page xiii Friday, October 6, 2000 5:1 PM

xiv Figures
Figure 5-8. Ethernet Tab ...........................................................................................5-17
Figure 5-9. Remote NodeTab ..................................................................................5-19
Figure 5-10. Add/Modify Remote Node Tab ...............................................................5-20
Figure 5-11. PPP Detail Tab .......................................................................................5-23
Figure 5-12. TCP/IP Detail Tab ...................................................................................5-25
Figure 5-13. Static Routes Tab ...................................................................................5-27
Figure 5-14. Add/Modify Static Route Tab ..................................................................5-28
Figure 6-1. Menu 4 - Internet Access Setup ..............................................................6-2
Figure 6-2. Menu 15 - Multiple Server Configuration .................................................6-5
Figure 6-3. Menu 11 - Remote Node Setup ...............................................................6-7
Figure 6-4. Menu 11.1 - Remote Node Profile ...........................................................6-8
Figure 6-5. Menu 11.3 - Remote Node Network Layer Options .................................6-9
Figure 7-1. LAN-to-LAN Application ...........................................................................7-2
Figure 7-2. Menu 11.1 - Remote Node Profile ...........................................................7-3
Figure 7-3. Menu 11.2 - Remote Node PPP Options .................................................7-7
Figure 7-4. Menu 11.3 - Remote Node Network Layer Options ...............................7-10
Figure 7-5. Menu 21 - Filter Set Configuration .........................................................7-12
Figure 7-6. Menu 11.5 - Remote Node Filters ..........................................................7-13
Figure 7-7. Menu 24 - System Maintenance ............................................................7-14
Figure 7-8. IP Static RoutingTable Example ............................................................7-15
Figure 7-9. Menu 12 - IP Static Route Setup ...........................................................7-16
Figure 7-10. Menu 12.1 - Edit IP Static Route ............................................................7-16
Figure 8-1. Menu 13 - Default Dial-in Setup ...............................................................8-2
Figure 8-2. Menu 14 - Dial-in User Setup ...................................................................8-5
Figure 8-3. Menu 14.1 - Edit Dial-in User ...................................................................8-6
Figure 8-4. Menu 23.2 - System Security - External Server .......................................8-9
Figure 9-1. Outgoing Packet Filtering Process ...........................................................9-1
Figure 9-2. Menu 21 - Filter Set Configuration ...........................................................9-2
Figure 9-3. Menu 21.3 - Filter Rules Summary ..........................................................9-3
Figure 9-4. LAN Packet Which Triggered Last Call .....................................................9-9
Figure 9-5. Menu 21 - Filter Set Configuration .........................................................9-11
Figure 9-6. Menu 21.1.1 - TCP/IP Filter Rule Menu .................................................9-12
RT338LOF.fm Page xiv Friday, October 6, 2000 5:1 PM

Figures xv
Figure 9-7. Filter Rules Summary Menu ..................................................................9-13
Figure 9-8. Menu 11.5 - Remote Node Filters Menu ................................................9-14
Figure 11-1. Menu 24.1 - System Maintenance - Status ............................................11-2
Figure 11-2. Packet Examples ...................................................................................11-4
Figure 11-3. Menu 24.2.1 - System Maintenance - Information .................................11-4
Figure 11-4. Menu 24.2.2 - System Maintenance - Change Console Port Speed .....11-5
Figure 11-5. Menu 24.3.2 - System Maintenance - UNIX Syslog and Accounting .....11-7
Figure 11-6. Menu 24.4 - System Maintenance - Diagnostic .....................................11-9
Figure 11-7. Trace Display for a Successful TCP/IP Protocol Connection ...............11-11
Figure 11-8. Trace Display for a Failed TCP/IP Protocol Connection .......................11-11
Figure 12-1. Trace Display for a Successful TCP/IP Protocol Connection .................12-6
Figure 12-2. Trace Display for a Successful Multilink Connection ..............................12-9
Figure E-1. ISDN Protocol Analyzer Display ............................................................. E-4
Figure E-2. Trace Screen ........................................................................................... E-7
Figure E-3. Packet Trace Display Definitions ............................................................. E-8
Figure E-4. PPP Message Definitions ....................................................................... E-8
RT338LOF.fm Page xv Friday, October 6, 2000 5:1 PM

xvi Figures
RT338LOF.fm Page xvi Friday, October 6, 2000 5:1 PM

Tables xvii
Tables
Table 1-1. Address Classes .....................................................................................1-8
Table 1-2. Netmask Notation Translation Table for One Octet ................................1-11
Table 1-3. Netmask Formats ...................................................................................1-11
Table 2-1. LED Descriptions .....................................................................................2-4
Table 3-1. Hyperterminal COM Port Properties ........................................................3-9
Table 4-1. Manager Menu Commands ....................................................................4-5
Table 4-2. Manager Menu Summary .......................................................................4-6
Table 4-3. ISDN Setup Menu Parameters for North America ..................................4-9
Table 4-4. ISDN Advanced Setup Menu Fields ......................................................4-11
Table 4-5. Menu 3 - Ethernet Setup Menu Fields ..................................................4-14
Table 5-1. Advanced Router Configuration Tabs ....................................................5-10
Table 5-2. Menu Bar Commands ...........................................................................5-11
Table 5-3. General Tab Fields .................................................................................5-12
Table 5-4. ISDN Tab Fields ....................................................................................5-14
Table 5-5. Advanced ISDN Features Tab ...............................................................5-16
Table 5-6. Ethernet Tab Fields ...............................................................................5-17
Table 5-7. Remote Node Tab Fields .......................................................................5-21
Table 5-8. PPP Detail Tab ......................................................................................5-24
Table 5-9. TCP/IP Detail Tab ...................................................................................5-25
Table 5-10. Add/Modify Static Route Tab Fields ......................................................5-29
Table 6-1. Menu 15 Field Entries (Example) ............................................................6-5
RT338LOT.fm Page xvii Friday, October 6, 2000 5: 8 PM

xviii Tables
Table 7-1. Remote Node Profile Fields ....................................................................7-4
Table 7-2. Remote Node PPP Options Fields .........................................................7-8
Table 7-3. Relationship Between BTR and MTR ......................................................7-9
Table 7-4. Remote Node Network Layer Options Fields ........................................7-11
Table 7-5. Remote Node Filters Fields ...................................................................7-13
Table 7-6. Edit IP Static Route Fields ....................................................................7-17
Table 8-1. Default Dial-in Setup Fields ....................................................................8-3
Table 8-2. Edit Dial-in User Fields ...........................................................................8-7
Table 8-3. System Security - External Server Fields .............................................8-10
Table 9-1. Filter Rules Summary Abbreviations .......................................................9-4
Table 9-2. Filter Type IP Abbreviations ....................................................................9-4
Table 9-3. Filter Type GEN Abbreviations ................................................................9-4
Table 9-4. TCP/IP Filter Rule Fields ........................................................................9-5
Table 9-5. Generic Filter Rule Fields .......................................................................9-7
Table 10-1. Default Key Sequences ..........................................................................10-2
Table 11-1. System Maintenance Status Menu Commands ....................................11-2
Table 11-2. System Maintenance - Status Fields ....................................................11-3
Table 11-3. System Maintenance - Information Fields ..............................................11-5
Table 11-4. System Maintenance - Log and Trace Fields .........................................11-6
Table 11-5. System Maintenance - Syslog and Accounting Fields ...........................11-7
Table 11-6. System Maintenance - Diagnostic Fields ............................................11-10
Table 12-1. Code Numbers for Failed ISDN Initialization ..........................................12-3
Table C-1. Switch Types Supported ........................................................................C-2
Table C-2. National ISDN-1 Services with AT&T 5ESS Switch ...............................C-3
Table C-3. Multipoint Service with AT&T 5ESS Switch ...........................................C-3
Table C-4. Point-to-Point Service with AT&T 5ESS Switch .....................................C-4
Table C-5. National ISDN-1 Service with Northern Telecom Switch .......................C-5
Table C-6. Custom ISDN Service with Northern Telecom Switch ............................C-5
Table C-7. Available Phone Company Features .......................................................C-6
Table D-1. ISDN Call Clearing Codes .....................................................................D-1
RT338LOT.fm Page xviii Friday, October 6, 2000 5: 8 PM

Preface xix
Preface
Congratulations on your purchase of the NETGEAR
™
Model RT338 IS N Router.
This IS N router provides connection for one or more computer workstations to the Internet or to
the office over Integrated Services igital Network (IS N) lines. The router operates at a speed of
up to 512 kilobits per second (Kbps) or 128 Kbps without compression. At these speeds, you can
download video clips, music, or high-resolution color graphics from the World Wide Web or other
online services many times faster than you can with an analog modem. The router supports
concurrent data and voice communications, reducing cost and administration of multiple phone
lines.
Purpose
This guide describes the features of the Model RT338 IS N Router and provides installation and
configuration instructions.
Audience
To configure and install the Model RT338 router, you should have the following background and
experience:
• Working knowledge of basic network concepts and terminology
• Working knowledge of tools and procedures for installing and operating sensitive electronic
equipment
Preface.fm Page xix Friday, October 6, 2000 5:18 PM

Reference Guide for the Model RT338 ISDN Router
xx Preface
Conventions
This section describes the conventions used in this guide.
Special Message Formats
This guide uses the following formats to highlight special messages:
Use of Enter, Type, Press, and Click
This guide uses “enter,” “type,” and “press” to describe the following actions:
• When you read “enter,” type the text and press the Enter key.
• When you read “type,” type the text, but do not press the Enter key.
• When you read “press,” press only the alphanumeric or named key.
• When you read “click,” click the left mouse button.
Note
This format is used to highlight information of importance or special interest.
Caution
This format is used to highlight information that will help you prevent
equipment failure or loss of data.
Warning
This format is used to highlight information about the possibility of injury or
equipment damage.
Danger
This format is used to alert you that you may incur an electrical shock by
mishandling equipment.
Preface.fm Page xx Friday, October 6, 2000 5:18 PM