NETGEAR XM128 User manual

M-XM128NA-1
November 1997
NETGEAR, Inc.
A Bay Networks Company
48105 Warm Springs Blvd.
Fremont, CA 94539
USA
Reference Guide for the
Model XM128 ISDN
Digital Modem

ii
© 1997 by NETGEAR, Inc. All rights reserved.
Trademarks
Bay Networks is a registered trademark of Bay Networks, Inc.
NETGEAR and FirstGear are trademarks Bay Networks, Inc.
Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation.
Other brand and product names are trademarks of their respective holders.
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 without 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) Compliance Notice: Radio Frequency Notice
This device complies with part 15 of the 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 operation.
Note: 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
residential installation. 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 or 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 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.
EN 55 022 Declaration of Conformance
This is to certify that the NETGEAR Model XM128 Digital Modem is shielded against the generation of radio
interference in accordance with the application of Council Directive 89/336/EEC, Article 4a. Conformity is declared by
the application of EN 55 022 Class B (CISPR 22).

iii
Bestätigung des Herstellers/Importeurs
Es wird hiermit bestätigt, daß das Model NETGEAR Model XM 128 ISDN Digital Modem 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 gewissen Beschränkungen unterliegen. Lesen Sie dazu bitte die
Anmerkungen in der Betriebsanleitung.
Das Bundesamt für Zulassungen in der Telekommunikation wurde davon unterrichtet, daß dieses Gerät auf den Markt
gebracht wurde und es ist berechtigt, die Serie auf die Erfüllung der Vorschriften hin zu überprüfen.
Certificate of the Manufacturer/Importer
It is hereby certified that the NETGEAR Model XM128 Digital Modem has been suppressed in accordance with the
conditions set out in the BMPT-AmtsblVfg 243/1991 and Vfg 46/1992. The operation of some equipment (for example,
test transmitters) in accordance with the regulations may, however, 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 with the regulations.
VCCI-2 Statement
This equipment is in the second 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 Support
For assistance with installing and configuring your NETGEAR system or with 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 NETGEAR
products, you can contact NETGEAR at the following numbers:
• Phone:
U.S./Canada:1-800-211-2069
Japan: 0120-66-5402
Europe: (44) 171-571-5120
Australia:1-800-142-046
•Fax:
U.S./Canada: 510-498-2609

iv
World Wide Web
NETGEAR maintains a World Wide Web Home Page that you can access at the universal resource locator (URL)
http://NETGEAR.baynetworks.com. A direct connection to the Internet and a Web browser such as Internet Explorer
or Netscape are required.
Bulletin Board Service
NETGEAR maintains a bulletin board that you can access to obtain information about the latest version of the software.
In the United States, phone [phone].

Reference Guide for the Model XM128 ISDN Digital Modem
Contents v
Contents
Preface
Purpose ..........................................................................................................................xvii
Conventions ...................................................................................................................xviii
Special Message Formats .......................................................................................xviii
Use of Enter, Type, and Press .................................................................................xviii
Other Conventions ....................................................................................................xix
Related Publication ..........................................................................................................xix
Chapter 1
Introduction
Features ..........................................................................................................................1-1
Interface Options ......................................................................................................1-3
Front Panel .....................................................................................................................1-3
Rear Panel ......................................................................................................................1-6
Chapter 2
Installation
Package Contents ..........................................................................................................2-1
Installing the Modem ......................................................................................................2-2
Verifying Hardware Installation .......................................................................................2-3
Chapter 3
Setup for Windows 95 and Windows NT 4.0
Selecting the Appropriate Windows 95 Driver (INF file) .................................................3-1

vi Contents
Reference Guide for the Model XM128 ISDN Digital Modem
Chapter 4
Configuration
Configuring Your ISDN Line and Network ......................................................................4-1
Configuring Your Modem Using a Terminal Program .....................................................4-1
Understanding AT Commands .................................................................................4-2
Quick Tips for Issuing AT Commands ................................................................4-3
Using AT Commands to Verify Modem Response .............................................4-4
Communication Speed Setup ..................................................................................4-4
Switch Type Setup for North America ................................................................4-5
SPID Setup for North America ...........................................................................4-6
Entering DNs ............................................................................................................4-7
Setup for Europe and the United Kingdom ........................................................4-7
Chapter 5
Async to Sync PPP
Internet and Remote Access PPP and SLIP ..................................................................5-1
Making Async to Sync PPP and SLIP calls ..............................................................5-1
Keeping a Line Connection During Idle Time ....................................................5-2
Answering Async to Sync PPP calls ...............................................................................5-3
Multilink PPP ............................................................................................................5-3
Making a call using Multilink PPP ......................................................................5-3
Dialing Pre-stored Phone Numbers .........................................................................5-4
Endpoint Discriminator ......................................................................................5-4
Call Bumping Dynamic Channel Allocation ..............................................................5-5
Chapter 6
ISDN Overview
Commands for Outgoing Calls ........................................................................................6-1
Dialing Out Using ISDN Mode ..................................................................................6-1
Dialing Out Using ISDN Mode Optional Speech Bearer Service .............................6-2
Dialing Out for Analog Adapter Port 1 ......................................................................6-2
Dialing Out for Analog Adapter Port 2 ......................................................................6-2
Manually Switching Communication Modes .............................................................6-2
Placing the Call ........................................................................................................6-3

Reference Guide for the Model XM128 ISDN Digital Modem
Contents vii
Commands for Incoming Calls ........................................................................................6-4
Digital Data ...............................................................................................................6-4
Determining the Packet Length ................................................................................6-5
Answering a Call Using MSN ...................................................................................6-6
Data over Speech Channel ................................................................................6-7
Best-effort Call Answering .................................................................................6-7
Ambiguity Resolution Switch for Voice Calls .....................................................6-8
Multi Auto-Answering of Data Calls ...................................................................6-8
Understanding ISDN Communication Protocols .............................................................6-9
V.110 ISDN Communications .................................................................................6-10
Answering a V.110 Call ....................................................................................6-10
Making a V.110 Call .........................................................................................6-10
V.120 ISDN Communications .................................................................................6-11
Selecting V.120 for European ISDN (DSS1) Switch ........................................6-11
Selecting V.120 for German National ISDN (1TR6) .........................................6-11
Answering a V.120 Call ....................................................................................6-12
Making a V.120 Call .........................................................................................6-12
Configuring the V.120 Mode ......................................................................6-12
Dialing in V.120 Mode ...............................................................................6-13
Making a Bundled Call with V.120 .............................................................6-13
Identifying Your Line Provisioning .............................................................6-14
128 Kbps Speeds ......................................................................................6-15
Dialing Prestored Phone Numbers ............................................................6-15
Error Correction and Data Compression with V.120 .................................6-15
X.75 ISDN Communications (Europe) ...................................................................6-16
Answering an X.75 Call ...................................................................................6-16
Making an X.75 Call ........................................................................................6-17
Making a Bundled Call with X.75 ..............................................................6-17
Dialing Prestored Phone Numbers ............................................................6-18
Invoking V.42bis Data Compression ..........................................................6-18
Bundle Connection with V.42bis Data Compression .................................6-19

viii Contents
Reference Guide for the Model XM128 ISDN Digital Modem
Chapter 7
Advanced ISDN
Call Control for DSS1 .....................................................................................................7-1
Control of Outgoing Service Indicator ......................................................................7-2
Control of ISDN Phone Numbers and Subaddresses ..............................................7-3
Call Control for 1TR6 (Old German ISDN) .....................................................................7-5
Control of Outgoing Service Indicator ......................................................................7-5
Control of EAZ (ENDGERÄTEAUSWAHLZIFFER) ..................................................7-6
Command Function ...........................................................................................7-6
Answering a Call .............................................................................................................7-7
Answering a Call for DSS1 .......................................................................................7-7
Answering a Call for 1TR6 .......................................................................................7-8
Best-effort Call Answering ........................................................................................7-8
Ambiguity Resolution Switch for Voice Calls ............................................................7-9
Multi-Auto-Answering of Data Calls ..........................................................................7-9
Data Call Indication .........................................................................................7-10
Disable Inbound Call Connection ....................................................................7-10
Point-to-Point Configuration .............................................................................7-11
Placing a Call ................................................................................................................7-11
Placing a Call for DSS1 ..........................................................................................7-11
Placing a Call for 1TR6 ..........................................................................................7-12
User-To-User Information .......................................................................................7-13
Chapter 8
Analog Call Handling
AT Commands for Analog Calls ......................................................................................8-2
Making and Receiving Analog Calls ...............................................................................8-3
Placing a Call from the Analog Adapter ...................................................................8-3
Accepting an Incoming Call ......................................................................................8-4
Chapter 9
Modem Upgrade
Upgrading with Flash EPROM ........................................................................................9-1
Upgrade Instructions ................................................................................................9-2
Kernel Mode .............................................................................................................9-2

Reference Guide for the Model XM128 ISDN Digital Modem
Contents ix
Chapter 10
Troubleshooting
Power-on Self-test ........................................................................................................10-1
Loopback Tests .............................................................................................................10-2
ISDN Loopback test (AT&T9) .................................................................................10-2
Loopback with Self-test (AT&T10) ..........................................................................10-2
B1/B2 Loopback with Self-test ...............................................................................10-3
The Diagnostic Command ............................................................................................10-3
Modem Reset .........................................................................................................10-4
Using The Embedded Protocol Analyzer ...............................................................10-4
Setting up the Embedded EPA ........................................................................10-5
Capturing the Protocol Data ............................................................................10-5
Analyzing the Captured Data ...........................................................................10-6
...............................................................................................................................10-8
Appendix A
Technical Specifications
General Specifications ................................................................................................... A-1
Appendix B
Security Functions
Security Types and Levels ............................................................................................. B-1
Level 1 Security ....................................................................................................... B-2
Level 2 Security ....................................................................................................... B-2
Level 3 Security ....................................................................................................... B-3
Setting and Modifying Passwords .................................................................................. B-3
Nonpassword Auto Callback Function ........................................................................... B-4
Appendix C
AT Command Set Reference
Operation Mode of the DTE Interface ............................................................................C-1
Simplex Mode .........................................................................................................C-1
AT Command Descriptions ............................................................................................C-2
Description of ATI3 Output ......................................................................................C-7

xContents
Reference Guide for the Model XM128 ISDN Digital Modem
Appendix D
Status Registers and Result Codes
Viewing and Setting S-Registers ...................................................................................D-1
Setting S-Registers .................................................................................................D-2
Examples for Setting S-Registers .....................................................................D-2
S-Register Descriptions ..........................................................................................D-4
ATXn Result Code Option Table ............................................................................D-19
Result Code Chart Symbol Reference ..................................................................D-21
Result Code Field Descriptions .............................................................................D-22
Connect Strings for Error Corrected Connections .................................................D-23
Appendix E
Connector Pin Assignments
RJ-45 Plug and Connector ............................................................................................ E-1
RJ-11 Plug and Connector ............................................................................................ E-3
Appendix F
Serial Port Interface
RS-232 Serial Interface ..................................................................................................F-1
Asynchronous Cable Connections .................................................................................F-2
Appendix G
ISDN Reference
ISDN Overview ..............................................................................................................G-1
Basic Rate Interface ................................................................................................G-2
Out-of-Band Signaling .............................................................................................G-2
Terminal Adapter or Digital Modem .........................................................................G-3
ISDN Basic Rate Interface Points ...........................................................................G-3
SPID Setup .............................................................................................................G-4
Ordering ISDN Service ..................................................................................................G-4
Order Form for AT&T 5ESS Switch (NI-1 ISDN) ............................................................G-6
Order Form for DMS-100 Switch (NI-1 or Custom ISDN) ..............................................G-7
Order Form for EWSD (NI-1 ISDN) ...............................................................................G-8
Index

Figures xi
Figures
Figure 1-1. Front panel of the Model XM128 modem (with S/T interface) ..................1-3
Figure 1-2. Front panel of the Model XM128 modem (with U interface) .....................1-4
Figure 1-3. Rear panel of the Model XM128 modem (with S interface) .....................1-6
Figure 1-4. Rear panel of the Model XM128 modem (with U interface) .....................1-6
Figure 2-1. Model XM128 modem connections ..........................................................2-2
Figure E-1. RJ-45 plug and RJ-45 connector ............................................................ E-1
Figure E-2. RJ-11 plug and RJ-11 connector ............................................................ E-3

xii Figures

Tables xiii
Tables
Table 1. Manual contents ........................................................................................xix
Table 2. Manuals ................................................................................................... xx
Table 1-1. Interface options ......................................................................................1-3
Table 1-2. LED descriptions ......................................................................................1-4
Table 1-3. Rear panel components ...........................................................................1-7
Table 4-1. Terminal programs ...................................................................................4-2
Table 4-2. Supported AT command types .................................................................4-3
Table 4-3. Result codes commands ..........................................................................4-4
Table 4-4. Switches supported by the Model XM128 modem ..................................4-5
Table 4-5. AT commands for setting protocols ..........................................................4-8
Table 4-6. AT commands for setting MSN ................................................................4-8
Table 5-1. S85 register values ..................................................................................5-4
Table 6-1. Dialing commands ...................................................................................6-3
Table 6-2. Call placing commands ............................................................................6-3
Table 6-3. Commands for assigning ISDN numbers .................................................6-6
Table 6-4. Best-effort call answering bit commands .................................................6-8
Table 6-5. ISDN protocol specifications ....................................................................6-9
Table 6-6. V.110 configuration commands ..............................................................6-10

xiv Tables
Table 7-1. S-register values and functions ................................................................7-2
Table 7-2. Outgoing low-layer compatibility commands ............................................7-3
Table 8-1. Frequently used AT commands ................................................................8-2
Table 8-2. Frequently used AT commands (European switches) ..............................8-2
Table 9-1. Definitions for the d modifier ....................................................................9-1
Table 10-1. Power-on self-test ..................................................................................10-1
Table 10-2. EPA Commands .....................................................................................10-6
Table 10-3. Commands for analyzing captured data ................................................10-6
Table 10-4. Control key functions .............................................................................10-7
Table B-1. Types of security ..................................................................................... B-2
Table B-2. Levels of security .................................................................................... B-3
Table B-3. Auto callback commands ........................................................................ B-4
Table C-1. Basic AT command set ...........................................................................C-2
Table C-2. ATI3 command output .............................................................................C-8
Table C-3. Extended AT& command set ...................................................................C-8
Table C-4. Extended AT* command set ..................................................................C-12
Table D-1. Binary conversion table ...........................................................................D-3
Table D-2. Setting bit 3 .............................................................................................D-3
Table D-3. Basic S-registers ATSn=x .......................................................................D-4
Table D-4. Extended S-registers ATSn=x .................................................................D-5
Table D-5. ATXn command setting options ............................................................D-19
Table D-6. Result code chart ..................................................................................D-21
Table D-7. Result code field descriptions ...............................................................D-22
Table D-8. Connect strings .....................................................................................D-23

Tables xv
Table E-1. RJ-45 plug and RJ-45 connector pin assignments for the S/T interface . E-2
Table E-2. RJ-45 plug and RJ-45 connector pin assignments for the U interface .... E-2
Table E-3. RJ-11 connector pin assignments ........................................................... E-3
Table F-1. Serial port interface ..................................................................................F-1
Table F-2. Asynchronous flow control cable connection ...........................................F-2
Table G-1. ISDN line configuration ...........................................................................G-6
Table G-2. ISDN line configuration ...........................................................................G-7
Table G-3. ISDN line configuration ...........................................................................G-8

xvi Tables

Preface xvii
Preface
Congratulations on your purchase of the NETGEAR™Model XM128 ISDN Digital Modem.
The NETGEAR Model XM128 modem provides connection for one or more PCs to the Internet
or to the office over ISDN (Integrated Services Digital Network) lines. The modem operates
at a speed of up to 460 kilobits per second (Kbps) data rate, or 115 Kbps data rate without
compression, and can download video clips, music, or high-resolution color graphics from the
World Wide Web or other online services many times faster than an analog modem. The Model
XM128 modem supports concurrent data and voice communications, reducing cost and
administration of multiple phone lines.
Purpose
This guide provides instructions for the installation and use of the Model XM128 modem. This
guide also provides instructions for the installation and use of FirstGear™, a configuration software
application for installing, configuring, and monitoring the Model XM128 modem.

Reference Guide for the Model XM128 ISDN Digital Modem
xviii 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, and Press
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 material involving possibility of injury or
equipment damage.

Reference Guide for the Model XM128 ISDN Digital Modem
Preface xix
Other Conventions
This guide uses the following additional conventions:
italics Book titles and UNIX file, command, and directory names.
courier font Screen text, user-typed command-line entries.
Initial Caps Menu titles and window and button names.
[Enter] Named keys in text are shown enclosed in square brackets. The notation
[Enter] is used for the Enter key and the Return key.
[Ctrl]+C Two or more keys that must be pressed simultaneously are shown in text
linked with a plus (+) sign.
ALL CAPS DOS file and directory names.
Related Publication
Refer to Getting Started Using FirstGear for the Model XM128 ISDN Digital Modem for a quick
installation guide. Refer to Table 1 to identify the contents of both manuals. The subject column in
this table identifies the order of basic procedures you must complete to install your Model XM128
modem.
Table 1. Manual contents
Subject Getting Started Using FirstGear for the Model XM128 ISDN Digital
Modem
Reference Guide for the Model
XM128 ISDN Digital Modem
Installing modem hardware Chapter 3 Chapter 2
Configuring the modem Chapter 3
(If you are using Windows®95
or Windows NT®)
Chapter 4
(If you are using a terminal
program.)
Installing the Windows 95 and
Windows NT Driver Chapter 3 No information given.
Installing FirstGear Chapter 3 No information given.
Assigning ISDN numbers Chapter 3 Chapter 4 and Chapter 5
(For using AT commands when
assigning ISDN numbers.)

Reference Guide for the Model XM128 ISDN Digital Modem
xx Preface
Table 2 lists the manuals that are available for various localized products.
Assigning multiple subscriber
numbers Chapter 3 Chapter 5 (For using AT commands when
assigning multiple subscriber
numbers.)
Assigning protocols Chapter 3 Chapter 4 and Chapter 5
(For using AT commands when
assigning protocols.)
Configuring Windows 95 Dial-Up
Networking Chapter 3 See:
Getting Started Using
FirstGear
Table 2. Manuals
Language Product Model/
Version Interface Reference Manual FirstGear Manual
English Model XM128S
International S/T M-XM128NA-0 M1-XM128S-0
English Model XM128AU
North America U M-XM128NA-0 M1-XM128U-0
Japanese Model XM128D
Japanese DSU M-XM128JP-0 M1-XM128JP-0
German Model XM128GE
German S/T M-XM128NA-0 M1-XM128S-0
Korean Model XM128KO
Korean U M-XM128KO-0 M1-XM128KO-0
Table 1. Manual contents (continued)
Subject Getting Started Using FirstGear for the Model XM128 ISDN Digital
Modem
Reference Guide for the Model
XM128 ISDN Digital Modem