ZyXEL Communications P-660R-Tx v2 Series User manual

P-660R-Tx v2 Series User’s Guide
1
P-660R-Tx v2 Series
ADSL2+ Access Router
User’s Guide
Version 3.40
8/2007
DEFAULT LOGIN
IP Address http://192.168.1.1
Password 1234

P-660R-Tx v2 Series User’s Guide
Copyright 3
Copyright
Copyright © 2007 by ZyXEL Communications Corporation.
The contents of this publication may not be reproduced in any part or as a whole, transcribed,
stored in a retrieval system, translated into any language, or transmitted in any form or by any
means, electronic, mechanical, magnetic, optical, chemical, photocopying, manual, or
otherwise, without the prior written permission of ZyXEL Communications Corporation.
Published by ZyXEL Communications Corporation. All rights reserved.
Disclaimer
ZyXEL does not assume any liability arising out of the application or use of any products, or
software described herein. Neither does it convey any license under its patent rights nor the
patent rights of others. ZyXEL further reserves the right to make changes in any products
described herein without notice. This publication is subject to change without notice.
Trademarks
ZyNOS (ZyXEL Network Operating System) is a registered trademark of ZyXEL
Communications, Inc. Other trademarks mentioned in this publication are used for
identification purposes only and may be properties of their respective owners.

P-660R-Tx v2 Series User’s Guide
4Certifications
Certifications
Federal Communications Commission (FCC) Interference Statement
This device complies with Part 15 of FCC rules. Operation is subject to the following two This
device complies with Part 15 of FCC rules. Operation is subject to the following two
conditions:
• This device may not cause harmful interference.
• This device must accept any interference received, including interference that may cause
undesired operations.
This equipment has been tested and found to comply with 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 commercial environment. This equipment
generates, uses, and can radiate radio frequency energy, and if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio/television reception, which 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 following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Notice 1
Changes or modifications not expressly approved by the party responsible for compliance
could void the user's authority to operate the equipment.
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
Viewing Certifications
1Go to www.zyxel.com.
2Select your product from the drop-down list box on the ZyXEL home page to go to that
product's page.
3Select the certification you wish to view from this page.

P-660R-Tx v2 Series User’s Guide
Safety Warnings 5
Safety Warnings
For your safety, be sure to read and follow all warning notices and instructions.
• Do NOT use this product near water, for example, in a wet basement or near a swimming
pool.
• Do NOT expose your device to dampness, dust or corrosive liquids.
• Do NOT store things on the device.
• Do NOT install, use, or service this device during a thunderstorm. There is a remote risk
of electric shock from lightning.
• Connect ONLY suitable accessories to the device.
• Do NOT open the device or unit. Opening or removing covers can expose you to
dangerous high voltage points or other risks. ONLY qualified service personnel should
service or disassemble this device. Please contact your vendor for further information.
• Make sure to connect the cables to the correct ports.
• Place connecting cables carefully so that no one will step on them or stumble over them.
• Always disconnect all cables from this device before servicing or disassembling.
• Use ONLY an appropriate power adaptor or cord for your device. Connect it to the right
supply voltage (for example, 110V AC in North America or 230V AC in Europe).
• Do NOT use the device if the power adaptor or cord is damaged as it might cause
electrocution.
• If the power adaptor or cord is damaged, remove it from the device and the power source.
• Do NOT attempt to repair the power adaptor or cord. Contact your local vendor to order a
new one.
• Do not use the device outside, and make sure all the connections are indoors. There is a
remote risk of electric shock from lightning.
• Do NOT obstruct the device ventilation slots, as insufficient airflow may harm your
device.
• Use only No. 26 AWG (American Wire Gauge) or larger telecommunication line cord.
• If you wall mount your device, make sure that no electrical lines, gas or water pipes will
be damaged.

P-660R-Tx v2 Series User’s Guide
6ZyXEL Limited Warranty
ZyXEL Limited Warranty
ZyXEL warrants to the original end user (purchaser) that this product is free from any defects
in materials or workmanship for a period of up to two years from the date of purchase. During
the warranty period, and upon proof of purchase, should the product have indications of failure
due to faulty workmanship and/or materials, ZyXEL will, at its discretion, repair or replace the
defective products or components without charge for either parts or labor, and to whatever
extent it shall deem necessary to restore the product or components to proper operating
condition. Any replacement will consist of a new or re-manufactured functionally equivalent
product of equal value, and will be solely at the discretion of ZyXEL. This warranty shall not
apply if the product is modified, misused, tampered with, damaged by an act of God, or
subjected to abnormal working conditions.
Note
Repair or replacement, as provided under this warranty, is the exclusive remedy of the
purchaser. This warranty is in lieu of all other warranties, express or implied, including any
implied warranty of merchantability or fitness for a particular use or purpose. ZyXEL shall in
no event be held liable for indirect or consequential damages of any kind of character to the
purchaser.
To obtain the services of this warranty, contact ZyXEL's Service Center for your Return
Material Authorization number (RMA). Products must be returned Postage Prepaid. It is
recommended that the unit be insured when shipped. Any returned products without proof of
purchase or those with an out-dated warranty will be repaired or replaced (at the discretion of
ZyXEL) and the customer will be billed for parts and labor. All repaired or replaced products
will be shipped by ZyXEL to the corresponding return address, Postage Paid. This warranty
gives you specific legal rights, and you may also have other rights that vary from country to
country.
Registration
Register your product online to receive e-mail notices of firmware upgrades and information
at www.zyxel.com for global products, or at www.us.zyxel.com for North American products.

P-660R-Tx v2 Series User’s Guide
Customer Support 7
Customer Support
Please have the following information ready when you contact customer support.
Required Information
• Product model and serial number.
• Warranty Information.
• Date that you received your device.
• Brief description of the problem and the steps you took to solve it.
“+” is the (prefix) number you dial to make an international telephone call.
Corporate Headquarters (Worldwide)
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.com, www.europe.zyxel.com
• FTP: ftp.zyxel.com, ftp.europe.zyxel.com
• Regular Mail: ZyXEL Communications Corp., 6 Innovation Road II, Science Park,
Hsinchu 300, Taiwan
Costa Rica
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.co.cr
• FTP: ftp.zyxel.co.cr
• Regular Mail: ZyXEL Costa Rica, Plaza Roble Escazú, Etapa El Patio, Tercer Piso, San
José, Costa Rica
Czech Republic
• E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.cz
• Regular Mail: ZyXEL Communications, Czech s.r.o., Modranská 621, 143 01 Praha 4 -
Modrany, Ceská Republika
Denmark
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]

P-660R-Tx v2 Series User’s Guide
8Customer Support
• Fax: [phone]
• Web: www.zyxel.dk
• Regular Mail: ZyXEL Communications A/S, Columbusvej, 2860 Soeborg, Denmark
Finland
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.fi
• Regular Mail: ZyXEL Communications Oy, Malminkaari 10, 00700 Helsinki, Finland
France
• E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.fr
• Regular Mail: ZyXEL France, 1 rue des Vergers, Bat. 1 / C, 69760 Limonest, France
Germany
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.de
• Regular Mail: ZyXEL Deutschland GmbH., Adenauerstr. 20/A2 D-52146, Wuerselen,
Germany
Hungary
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.hu
• Regular Mail: ZyXEL Hungary, 48, Zoldlomb Str., H-1025, Budapest, Hungary
India
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone] to [phone]
• Fax: [phone]
• Web: http://www.zyxel.in
• Regular Mail: India - ZyXEL Technology India Pvt Ltd., II-Floor, F2/9 Okhla Phase -1,
New Delhi 110020, India

P-660R-Tx v2 Series User’s Guide
Customer Support 9
Japan
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.co.jp
• Regular Mail: ZyXEL Japan, 3F, Office T&U, 1-10-10 Higashi-Gotanda, Shinagawa-ku,
Tokyo 141-0022, Japan
Kazakhstan
• Support: http://zyxel.kz/support
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.kz
• Regular Mail: ZyXEL Kazakhstan, 43 Dostyk Ave., Office 414, Dostyk Business Centre,
050010 Almaty, Republic of Kazakhstan
Malaysia
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: http://www.zyxel.com.my
• Regular Mail: ZyXEL Malaysia Sdn Bhd., 1-02 & 1-03, Jalan Kenari 17F, Bandar
Puchong Jaya, 47100 Puchong, Selangor Darul Ehsan, Malaysia
North America
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.us.zyxel.com
• FTP: ftp.us.zyxel.com
• Regular Mail: ZyXEL Communications Inc., 1130 N. Miller St., Anaheim, CA 92806-
2001, U.S.A.
Norway
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.no
• Regular Mail: ZyXEL Communications A/S, Nils Hansens vei 13, 0667 Oslo, Norway

P-660R-Tx v2 Series User’s Guide
10 Customer Support
Poland
• E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.pl.zyxel.com
• Regular Mail: ZyXEL Communications, ul. Okrzei 1A, 03-715 Warszawa, Poland
Russia
• Support: http://zyxel.ru/support
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.ru
• Regular Mail: ZyXEL Russia, Ostrovityanova 37a Str., Moscow 117279, Russia
Singapore
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: http://www.zyxel.com.sg
• Regular Mail: ZyXEL Singapore Pte Ltd., No. 2 International Business Park, The Strategy
#03-28, Singapore 609930
Spain
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.es
• Regular Mail: ZyXEL Communications, Arte, 21 5ª planta, 28033 Madrid, Spain
Sweden
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.zyxel.se
• Regular Mail: ZyXEL Communications A/S, Sjöporten 4, 41764 Göteborg, Sweden
Thailand
• Support E-mail: [email protected]
• Sales E-mail: [email protected]

P-660R-Tx v2 Series User’s Guide
Customer Support 11
• Telephone: [phone]
• Fax: [phone]
• Web: http://www.zyxel.co.th
• Regular Mail: ZyXEL Thailand Co., Ltd., 1/1 Moo 2, Ratchaphruk Road, Bangrak-Noi,
Muang, Nonthaburi 11000, Thailand.
Ukraine
• Support E-mail: su[email protected]
• Sales E-mail: [email protected]
• Telephone: [phone]
• Fax: [phone]
• Web: www.ua.zyxel.com
• Regular Mail: ZyXEL Ukraine, 13, Pimonenko Str., Kiev 04050, Ukraine
United Kingdom
• Support E-mail: [email protected]
• Sales E-mail: [email protected]
• Telephone: [phone] (UK only)
• Fax: [phone]
• Web: www.zyxel.co.uk
• FTP: ftp.zyxel.co.uk
• Regular Mail: ZyXEL Communications UK Ltd., 11 The Courtyard, Eastern Road,
Bracknell, Berkshire RG12 2XB, United Kingdom (UK)

P-660R-Tx v2 Series User’s Guide
12 Customer Support

P-660R-Tx v2 Series User’s Guide
Table of Contents 13
Table of Contents
Copyright3
Certifications4
Safety Warnings5
ZyXEL Limited Warranty6
Customer Support7
Table of Contents13
List of Figures19
List of Tables23
Preface25
Chapter 1
Getting To Know Your ZyXEL Device27
Introducing the ZyXEL Device 27
Features of the ZyXEL Device 27
Applications for the ZyXEL Device 31
Internet Access 32
LAN to LAN Application 32
ZyXEL Device Hardware Installation and Connection 32
Front Panel LEDs 33
Chapter 2
Introducing the Web Configurator35
Web Configurator Overview 35
Accessing the ZyXEL Device Web Configurator 35
Resetting the ZyXEL Device 36
Using the Reset Button 37
Navigating the ZyXEL Device Web Configurator 37
Chapter 3
Wizard Setup 39
Introduction 39
Encapsulation 39
ENET ENCAP 39
PPP over Ethernet 39
PPPoA 39
RFC 1483 40

P-660R-Tx v2 Series User’s Guide
14 Table of Contents
Multiplexing 40
VC-based Multiplexing 40
LLC-based Multiplexing 40
VPI and VCI 40
Internet Access Wizard Setup: First Screen 40
IP Address and Subnet Mask 41
IP Address Assignment 42
IP Assignment with PPPoA or PPPoE Encapsulation 42
IP Assignment with RFC 1483 Encapsulation 42
IP Assignment with ENET ENCAP Encapsulation 42
Private IP Addresses 43
Nailed-Up Connection (PPP) 43
NAT 43
Internet Access Wizard Setup: Second Screen 43
DHCP Setup 47
IP Pool Setup 47
Internet Access Wizard Setup: Third Screen 47
Internet Access Wizard Setup: Connection Test 50
Test Your Internet Connection 50
Chapter 4
Password Setup51
Password Overview 51
Configuring Password 51
Chapter 5
LAN Setup53
LAN Overview 53
LANs, WANs and the ZyXEL Device 53
DNS Server Address 54
DNS Server Address Assignment 54
LAN TCP/IP 55
Factory LAN Defaults 55
IP Address and Subnet Mask 55
RIP Setup 55
Multicast 56
Any IP 56
How Any IP Works 57
Configuring LAN 58
Chapter 6
WAN Setup61
WAN Overview 61

P-660R-Tx v2 Series User’s Guide
Table of Contents 15
Metric 61
PPPoE Encapsulation 62
Traffic Shaping 62
Zero Configuration Internet Access 63
Configuring WAN Setup 63
Traffic Redirect 66
Configuring WAN Backup 67
Chapter 7
Network Address Translation (NAT) Screens71
NAT Overview 71
NAT Definitions 71
What NAT Does 72
How NAT Works 72
NAT Application 73
NAT Mapping Types 73
SUA (Single User Account) Versus NAT 74
SUA Server 75
Default Server IP Address 75
Port Forwarding: Services and Port Numbers 75
Configuring Servers Behind SUA (Example) 76
Selecting the NAT Mode 76
Configuring SUA Server 77
Configuring Address Mapping 79
Editing an Address Mapping Rule 80
Chapter 8
Dynamic DNS Setup83
Dynamic DNS 83
DYNDNS Wildcard 83
Configuring Dynamic DNS 83
Chapter 9
Time and Date85
Configuring Time and Date 85
Chapter 10
Remote Management Configuration87
Remote Management Overview 87
Remote Management Limitations 87
Remote Management and NAT 88
System Timeout 88
Telnet 88

P-660R-Tx v2 Series User’s Guide
16 Table of Contents
FTP 88
Web 88
Configuring Remote Management 88
Chapter 11
Universal Plug-and-Play (UPnP)91
How do I know if I'm using UPnP? 91
NAT Traversal 91
Cautions with UPnP 92
UPnP and ZyXEL 92
Configuring UPnP 92
Installing UPnP in Windows Example 93
Using UPnP in Windows XP Example 97
Chapter 12
Maintenance103
Maintenance Overview 103
System Status Screen 103
System Statistics 105
DHCP Table Screen 106
Any IP Table Screen 107
Diagnostic Screens 108
Diagnostic General Screen 108
Diagnostic DSL Line Screen 109
Firmware Screen 110
Backup Configuration 112
Restore Configuration 113
Back to Factory Defaults 114
Chapter 13
Troubleshooting117
Problems Starting Up the ZyXEL Device 117
Problems with the LAN LED 117
Problems with the Password 118
Problems with the DSL LED 118
Problems with the LAN Interface 118
Problems with the WAN Interface 119
Problems with Internet Access 119
Problems with Remote Management 119
Problems with the Web Configurator 120
Pop-up Windows, JavaScripts and Java Permissions 120
Internet Explorer Pop-up Blockers 120
JavaScripts 123

P-660R-Tx v2 Series User’s Guide
Table of Contents 17
Java Permissions 125
129
Product Specifications 129
133
Setting up Your Computer’s IP Address 133
Windows 95/98/Me 133
Installing Components 134
Configuring 135
Verifying Settings 136
Windows 2000/NT/XP 136
Verifying Settings 141
Macintosh OS 8/9 141
Verifying Settings 143
Macintosh OS X 143
Verifying Settings 144
Linux 144
Using the K Desktop Environment (KDE) 145
Using Configuration Files 146
Verifying Settings 148
149
IP Addresses and Subnetting 149
Introduction to IP Addresses 149
IP Address Classes and Hosts 149
Subnet Masks 151
Subnetting 151
Example: Two Subnets 152
Example: Four Subnets 153
Example Eight Subnets 154
Subnetting With Class A and Class B Networks. 155
157
Splitters and Microfilters 157
Connecting a POTS Splitter 157
Telephone Microfilters 157
ZyXEL Device With ISDN 158
161
Command Interpreter 161
Command Syntax 161
Command Usage 161
163
Log Descriptions 163
167
PPPoE 167
PPPoE in Action 167
Benefits of PPPoE 167

P-660R-Tx v2 Series User’s Guide
18 Table of Contents
Traditional Dial-up Scenario 167
How PPPoE Works 168
ZyXEL Device as a PPPoE Client 168
169
Virtual Circuit Topology169
Index171

P-660R-Tx v2 Series User’s Guide
List of Figures 19
List of Figures
Figure 1ZyXEL Device Internet Access Application 32
Figure 2ZyXEL Device LAN-to-LAN Application 32
Figure 3Password Screen 36
Figure 4Change Password at Login 36
Figure 5 Web Configurator: Site Map Screen 37
Figure 6Internet Access Wizard Setup: First Screen 41
Figure 7Internet Connection with PPPoE 44
Figure 8 Internet Connection with RFC 1483 45
Figure 9Internet Connection with ENET ENCAP 45
Figure 10Internet Connection with PPPoA 46
Figure 11Internet Access Wizard Setup: Third Screen 48
Figure 12Internet Access Wizard Setup: LAN Configuration 49
Figure 13Internet Access Wizard Setup: Connection Tests 50
Figure 14Password 51
Figure 15LAN and WAN IP Addresses 53
Figure 16Any IP Example 57
Figure 17LAN Setup 58
Figure 18Example of Traffic Shaping 63
Figure 19WAN Setup (PPPoE) 64
Figure 20Traffic Redirect Example 67
Figure 21Traffic Redirect LAN Setup 67
Figure 22WAN Backup 68
Figure 23How NAT Works 73
Figure 24NAT Application With IP Alias 73
Figure 25Multiple Servers Behind NAT Example 76
Figure 26NAT Mode 77
Figure 27Edit SUA/NAT Server Set 78
Figure 28Address Mapping Rules 79
Figure 29Address Mapping Rule Edit 80
Figure 30Dynamic DNS 84
Figure 31Time and Date 85
Figure 32Telnet Configuration on a TCP/IP Network 88
Figure 33Remote Management 89
Figure 34Configuring UPnP 93
Figure 35Add/Remove Programs: Windows Setup: Communication 94
Figure 36Add/Remove Programs: Windows Setup: Communication: Components 94
Figure 37Network Connections 95
Figure 38Windows Optional Networking Components Wizard 96
Figure 39Networking Services 96
Figure 40Network Connections 97

P-660R-Tx v2 Series User’s Guide
20 List of Figures
Figure 41Internet Connection Properties 98
Figure 42Internet Connection Properties: Advanced Settings 99
Figure 43Internet Connection Properties: Advanced Settings: Add 99
Figure 44System Tray Icon 100
Figure 45Internet Connection Status 100
Figure 46Network Connections 101
Figure 47Network Connections: My Network Places 102
Figure 48Network Connections: My Network Places: Properties: Example 102
Figure 49System Status 104
Figure 50System Status: Show Statistics 105
Figure 51DHCP Table 107
Figure 52Any IP Table 107
Figure 53Diagnostic: General 108
Figure 54Diagnostic: DSL Line 109
Figure 55Firmware Upgrade 111
Figure 56Network Temporarily Disconnected 111
Figure 57Error Message 112
Figure 58Configuration 112
Figure 59Backup Configuration 113
Figure 60Restore Configuration 113
Figure 61Restore Configuration Successful 114
Figure 62Network Temporarily Disconnected 114
Figure 63Reset to Factory Default Settings 115
Figure 64Pop-up Blocker 121
Figure 65 Internet Options 121
Figure 66Internet Options 122
Figure 67Pop-up Blocker Settings 123
Figure 68Internet Options 124
Figure 69Security Settings - Java Scripting 125
Figure 70Security Settings - Java 126
Figure 71Java (Sun) 127
Figure 72WIndows 95/98/Me: Network: Configuration 134
Figure 73Windows 95/98/Me: TCP/IP Properties: IP Address 135
Figure 74Windows 95/98/Me: TCP/IP Properties: DNS Configuration 136
Figure 75Windows XP: Start Menu 137
Figure 76Windows XP: Control Panel 137
Figure 77Windows XP: Control Panel: Network Connections: Properties 138
Figure 78Windows XP: Local Area Connection Properties 138
Figure 79Windows XP: Internet Protocol (TCP/IP) Properties 139
Figure 80Windows XP: Advanced TCP/IP Properties 140
Figure 81Windows XP: Internet Protocol (TCP/IP) Properties 141
Figure 82Macintosh OS 8/9: Apple Menu 142
Figure 83Macintosh OS 8/9: TCP/IP 142

P-660R-Tx v2 Series User’s Guide
List of Figures 21
Figure 84Macintosh OS X: Apple Menu 143
Figure 85Macintosh OS X: Network 144
Figure 86Red Hat 9.0: KDE: Network Configuration: Devices 145
Figure 87Red Hat 9.0: KDE: Ethernet Device: General 145
Figure 88Red Hat 9.0: KDE: Network Configuration: DNS 146
Figure 89Red Hat 9.0: KDE: Network Configuration: Activate 146
Figure 90Red Hat 9.0: Dynamic IP Address Setting in ifconfig-eth0 147
Figure 91Red Hat 9.0: Static IP Address Setting in ifconfig-eth0 147
Figure 92Red Hat 9.0: DNS Settings in resolv.conf 147
Figure 93Red Hat 9.0: Restart Ethernet Card 148
Figure 94Red Hat 9.0: Checking TCP/IP Properties 148
Figure 95Connecting a POTS Splitter 157
Figure 96Connecting a Microfilter 158
Figure 97ZyXEL Device with ISDN 159
Figure 98Single-Computer per Router Hardware Configuration 168
Figure 99ZyXEL Device as a PPPoE Client 168
Figure 100Virtual Circuit Topology 169