ZyXEL Communications U-90E User manual

U-90 E
User’s Guide
Version 1.0
ZyXEL
TOTAL INTERNET ACCESS SOLUTION

U-90E Data/Fax Modem
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U-90E Data/ Fax Modem
Copyright
Copyright © 1999 by ZyXEL
The contents of this book may not be reproduced (in any part or as a whole) or transmitted in any form or by
any means without the written permission of the publisher.
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 patents rights of others.
ZyXEL further reserves the right to make changes in any products described herein without notice. This
document is subject to change without notice.
Trademarks
Trademarks mentioned in this manual are used for informational purposes only and they may be properties of
their respective owners.

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Federal Communications Commission (FCC) Interference Statement
This device complies with Part 15 of FCC rules. Operation is subject to the following two conditions:
zThis device may not cause harmful interference.
zThis 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.
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:
1. Reorient or relocate the receiving antenna.
2. Increase the separation between the equipment and the receiver.
3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
4. 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.
Notice 2
Shielded RS-232 cables are required to be used to ensure compliance with FCC Part 15, and it is the
responsibility of the user to provide and use shielded RS-232 cables.

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Information for Canadian Users
The Industry Canada label identifies certified equipment. This certification means that the equipment meets
certain telecommunications network protective, operation, and safety requirements. The Industry Canada
does not guarantee that the equipment will operate to a user's satisfaction.
Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of
the local telecommunications company. The equipment must also be installed using an acceptable method of
connection. In some cases, the company's inside wiring associated with a single line individual service may be
extended by means of a certified connector assembly. The customer should be aware that the compliance
with the above conditions may not prevent degradation of service in some situations.
Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by
the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may
give the telecommunications company cause to request the user to disconnect the equipment.
For their own protection, users should ensure that the electrical ground connections of the power utility,
telephone lines, and internal metallic water pipe system, if present, are connected together. This precaution
may be particularly important in rural areas.
Caution
Users should not attempt to make such connections themselves, but should contact the appropriate electrical
inspection authority, or electrician, as appropriate.
Note
This digital apparatus does not exceed the class A limits for radio noise emissions from digital apparatus set
out in the radio interference regulations of Industry Canada.

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The declarations of CE marking:
The Prestige 480 has been approved for connection to the Public Switched Telecommunication Network using
interfaces compatible with ITU-TSS recommendation I.420 (Basic Rate ISDN user access). The Prestige 480
complies with the following directives:
1. The Council Directive 89/336/EEC of 3 May 1992 on the approximation of the laws of the member states
relation to Electro Magnetic Compatibility. (EMC Directive)
2. Council Directive 91/263/EEC of 29April 1991 on the approximation of the laws of the Member States
concerning telecommunication terminal equipment. (The Telecom Terminal Equipment Directive)
3. 93/68/EEC of 22 July 1993 amending the Directives 89/336/EEC, 91/263 /EEC and 92/31/EEC. (Marking
Directive)
4. The Council Directive 92/31/EEC of 28 April 1992 amending directive on the approximation of the laws of
the member states relating to Electro Magnetic Compatibility.

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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 (2) 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; refer to the separate Warranty Card
for your Return MaterialAuthorization 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 (USA and territories only). If the customer desires some other
return destination beyond the U.S. borders, the customer shall bear the cost of the return shipment. This
warranty gives you specific legal rights, and you may also have other rights that vary from state to state.

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Customer Support
If you have questions about your ZyXEL product or desire assistance, contact ZyXEL Communications
Corporation offices worldwide, in one of the following ways:
Method International North America Scandinavia
E-Mail-Tech
Support [email protected]w
[email protected] (Europe)
[email protected] [email protected]
E-Mail-Sales [email protected] [email protected] [e-mail]
Web Site www.zyxel.com www.zyxel.com www.zyxel.dk
Phone [phone] Ext.266 [phone]
800-255-4101
[phone]
Fax [phone] [phone] [phone]
FTP -
Software and
ROM
upgrades
ftp.zyxel.dk ftp.zyxel.com ftp.zyxel.dk
Regular Mail ZyXEL Communications Corp.,
6 Innovation Road II, Science-
Based Industrial Park,
Hsinchu, Taiwan 300, R.O.C.
ZyXEL Communications
Inc., 1650 Miraloma
Avenue, Placentia, CA
92870, U.S.A.
ZyXEL Communications
A/S, Columbusvej 5, 2860
Soeborg, Copenhagen,
Denmark

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Table of Contents
Table of Contents...........................................................................................................................viii
List of Figures.................................................................................................................................xv
List of Tables..................................................................................................................................xvi
Preface............................................................................................................................................xix
Chapter 1 ........................................................................................................................................1-1
Getting to Know Your Modem ......................................................................................................1-1
1.1 U-90E Data/Fax Modem......................................................................................................1-1
1.2 Standard Features ...............................................................................................................1-1
1.3 Intelligent Features .............................................................................................................1-2
1.4 Data Compatibility................................................................................................................1-3
1.5 Fax Compatibility .................................................................................................................1-4
1.6 Technical Specifications.......................................................................................................1-5
1.7 Applications..........................................................................................................................1-5
1.7.1 Data Transfer Via Leased Line ......................................................................1-5
1.7.2 Synchronous mode DTE................................................................................1-6
1.7.3 Internet Access ..............................................................................................1-6
Chapter 2 ........................................................................................................................................2-1
Modem Installation ........................................................................................................................2-1
2.1 Front Panel ..........................................................................................................................2-1
2.1.1 Front Panel LEDs...........................................................................................2-2
2.1.2 Front Panel Switches.....................................................................................2-3
2.2 Rear Panel...........................................................................................................................2-4
2.3 Additional Installation Requirements ...................................................................................2-5
2.4 Connecting the Modem........................................................................................................2-5

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2.5 Modem Configuration..........................................................................................................2-6
2.6 Power On.............................................................................................................................2-6
Chapter 3........................................................................................................................................3-1
Setting up your Internet Connection...........................................................................................3-1
3.1 Installing TCP/IP..................................................................................................................3-1
3.2 Configuring TCP/IP..............................................................................................................3-2
3.3 Creating a Dial-up Connection ............................................................................................3-4
Chapter 4........................................................................................................................................4-1
Basic Modem Operation ...............................................................................................................4-1
4.1 Understanding AT Commands.............................................................................................4-1
4.1.1 Using the Windows 95 Hyper Terminal Program ...........................................4-1
4.2 Dialing and Answering Techniques......................................................................................4-3
4.2.1 Dialing using the ATD Command...................................................................4-3
4.2.2 Auto-Answer and Hook Controls....................................................................4-4
4.3 Quick Tips when issuing AT Commands .............................................................................4-4
4.3.1 Modem Result Codes.....................................................................................4-6
4.3.2 Viewing S Register Values.............................................................................4-7
4.3.3 Changing S Register Values..........................................................................4-7
4.4 Non-Volatile Memory ...........................................................................................................4-8
4.4.1 Storing Phone Numbers.................................................................................4-8
4.4.2 Dialing Stored Phone Numbers......................................................................4-8
4.4.3 Saving Settings and User Profiles..................................................................4-9
4.5 Helpful Hints for PC Computers ..........................................................................................4-9
4.5.1 Default Modem Settings for PC’s .................................................................4-10
4.6 Helpful Hints for Mac Computers.......................................................................................4-11

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4.6.1 Special AT Command Settings for Mac.......................................................4-11
4.6.2 Mac Serial Port.............................................................................................4-11
4.6.3 Mac Software Tips .......................................................................................4-11
4.7 Helpful Hints for UNIX-Based Computers..........................................................................4-12
4.7.1 Serial Cable..................................................................................................4-12
4.7.2 Basic Modem Settings for UNIX...................................................................4-12
4.7.3 Unix Software Tips.......................................................................................4-12
Chapter 5 ........................................................................................................................................5-1
AT Command Set Summary..........................................................................................................5-1
5.1 Basic AT Command Set.......................................................................................................5-1
5.1.1 Result Code Options......................................................................................5-4
5.2 Extended AT& Command Set..............................................................................................5-7
5.3 Extended AT* Command Set.............................................................................................5-13
5.4 Extended AT# Command Set ............................................................................................5-16
5.5 AT Fax Command Set........................................................................................................5-16
5.6 AT Voice Command Set.....................................................................................................5-16
Chapter 6 ........................................................................................................................................6-1
Status Registers.............................................................................................................................6-1
6.1 S-Register Descriptions.......................................................................................................6-1
6.1.1 Basic S-Registers "ATSn=x"..........................................................................6-1
6.1.2 Extended S-Registers "ATSn=x"....................................................................6-2
Chapter 7 ........................................................................................................................................7-1
Leased Line Operation..................................................................................................................7-1
7.1 Connecting to a Leased Line...............................................................................................7-1
7.1.1 Line Type Setting...........................................................................................7-1

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7.1.2 Power Level Setting .......................................................................................7-1
7.2 Leased Line Handshaking...................................................................................................7-2
7.2.1 Manual Connect.............................................................................................7-2
7.2.2 Auto Handshake.............................................................................................7-2
7.3 Terminating a Leased Line Connection...............................................................................7-3
Chapter 8........................................................................................................................................8-1
Synchronous Mode Operation.....................................................................................................8-1
8.1 Mode options.......................................................................................................................8-1
8.2 Clock Options ......................................................................................................................8-2
8.3 Half-Duplex operation..........................................................................................................8-2
8.3.1 Pseudo CD.....................................................................................................8-3
8.3.2 V.13................................................................................................................8-3
Chapter 9........................................................................................................................................9-1
Error Control and Data Compression..........................................................................................9-1
9.1 Error Control........................................................................................................................9-1
9.2 Data Compression...............................................................................................................9-2
9.3 Flow Control.........................................................................................................................9-3
9.3.1 Hardware CTS/RTS Flow Control ..................................................................9-3
9.3.2 Software XON/XOFF Flow Control.................................................................9-3
Chapter 10....................................................................................................................................10-1
Special Functions........................................................................................................................10-1
10.1 Security Functions.........................................................................................................10-1
10.1.1 Levels of Security .....................................................................................10-1
10.1.2 User Passwords........................................................................................10-2
10.2 Remote Configuration....................................................................................................10-3

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10.3 Caller Number Delivery (Caller ID)................................................................................10-5
10.4 Distinctive Ring..............................................................................................................10-7
10.5 Extended Distinctive Ring (EDR)...................................................................................10-9
10.5.1 Setting Up EDR......................................................................................10-10
10.5.2 EDR Application Example ......................................................................10-11
10.6 On-line Help.................................................................................................................10-12
10.7 V.25bis Command Set.................................................................................................10-12
Chapter 11.....................................................................................................................................11-1
Fax Operation...............................................................................................................................11-1
11.1 Fax Basics .....................................................................................................................11-1
11.2 Modem as Fax Machine ................................................................................................11-2
11.2.1 ITU-T T.30 Fax Protocol...........................................................................11-2
11.3 Fax Command sets........................................................................................................11-3
11.3.1 Defining the Fax Command Sets..............................................................11-3
11.3.2 Service Class 1 Commands.....................................................................11-3
11.3.3 Service Class 2.0 Commands..................................................................11-5
11.4 Status Report Result Codes ..........................................................................................11-9
Chapter 12 ....................................................................................................................................12-1
Voice Capability ...........................................................................................................................12-1
12.1 The voice AT command specification ............................................................................12-1
12.2 Voice Shield DTE command..........................................................................................12-2
Chapter 13 ....................................................................................................................................13-1
Diagnostics...................................................................................................................................13-1
13.1 Power-on Self-test .........................................................................................................13-1
13.2 Loopback Tests..............................................................................................................13-2

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13.2.1 Analog Loopback Test (AT&T1) ...............................................................13-2
13.2.2 Analog Loopback with Self-test (AT&T8)..................................................13-2
13.2.3 Local Digital Loopback Test (AT&T3).......................................................13-2
13.2.4 Remote Digital Loopback Test (AT&T6)...................................................13-3
13.2.5 Remote Digital Loopback with Self-test (AT&T7)......................................13-3
13.3 Line Condition Report (AT#E1)......................................................................................13-3
13.4 Link Status Report (ATI2)...............................................................................................13-4
Indicator Lights ..........................................................................................................................13-7
13.4.1 Retransmission Indicator..........................................................................13-7
13.4.2 Dialing Indicator........................................................................................13-7
13.4.3 Handshaking And Retrain Indicator..........................................................13-7
Chapter 14....................................................................................................................................14-1
Upgrading Your Modem..............................................................................................................14-1
14.1 Upgrading by Flash EPROM.........................................................................................14-1
14.2 Kernel Recovery Mode..................................................................................................14-2
Chapter 15....................................................................................................................................15-1
Troubleshooting ..........................................................................................................................15-1
15.1 AT Command Set Problems..........................................................................................15-1
15.2 Command Echo Problems.............................................................................................15-3
15.3 Auto-Answer Problems..................................................................................................15-3
15.4 Dialing Problems............................................................................................................15-4
15.5 Data Transfer Problems.................................................................................................15-5
15.6 Connection Problems ....................................................................................................15-5
Appendix A....................................................................................................................................... A
Glossary ........................................................................................................................................... A

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Appendix B........................................................................................................................................J
EIA-232D Interface............................................................................................................................J
Appendix C....................................................................................................................................... K
Phone Jack Pin Assignments......................................................................................................... K
Index..................................................................................................................................................M

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List of Figures
Figure 2-1 Front Panel.....................................................................................................................2-1
Figure 2-2 Rear Panel.....................................................................................................................2-4
Figure 3-1 Select Network Component Type ..................................................................................3-1
Figure 3-2 Select Network Protocol.................................................................................................3-2
Figure 3-3 Network..........................................................................................................................3-3
Figure 3-4 IPAddress......................................................................................................................3-3
Figure 3-5 DNS Configuration.........................................................................................................3-4
Figure 3-6 Make New Connection...................................................................................................3-5
Figure 3-7 Insert ISP’s Phone Number............................................................................................3-5
Figure 3-8 Completing Dial-Up Connection.....................................................................................3-6

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List of Tables
Table 1-1 U-90E Data Operation Modes .........................................................................................1-3
Table 1-2 Fax Compatibility ............................................................................................................1-4
Table 2-1 LED Indicators .................................................................................................................2-2
Table 2-2 Front Panel Switches.......................................................................................................2-3
Table 2-3 Rear Panel.......................................................................................................................2-4
Table 4-1 Modem Settings...............................................................................................................4-2
Table 4-2 AT Result Codes ..............................................................................................................4-5
Table 4-3 Basic Commands.............................................................................................................4-5
Table 4-4 AT Command Sets/Types ................................................................................................4-6
Table 4-5 Profile Setting Commands...............................................................................................4-9
Table 4-6 Default Settings..............................................................................................................4-10
Table 5-1 Basic AT Command Set...................................................................................................5-1
Table 5-2 Result Code Options........................................................................................................5-4
Table 5-3 Extended AT& Command Set..........................................................................................5-7
Table 5-4 Extended AT* Command Set.........................................................................................5-13
Table 5-5 Extended AT# Command Set.........................................................................................5-16
Table 6-1 Basic S-Registers ............................................................................................................6-1
Table 6-2 Extended S-Registers......................................................................................................6-2
Table 7-1 AT Command to Set Line Type........................................................................................7-1
Table 7-2 AT Command to Set Power Level....................................................................................7-1
Table 7-3 AT Command for Auto Handshake...................................................................................7-3
Table 8-1 Synchronous Mode Options ............................................................................................8-1
Table 8-2 Clock Options...................................................................................................................8-2
Table 9-1 Error Control and Data Compression ..............................................................................9-2

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Table 10-1 Security Function Commands .....................................................................................10-3
Table 10-2 AT*Rab Command.......................................................................................................10-4
Table 10-3 AT*Wab Command ......................................................................................................10-4
Table 10-4 Ring Control.................................................................................................................10-8
Table 10-5 EDR Settings.............................................................................................................10-10
Table 10-6 V.25 Command Set....................................................................................................10-13
Table 11-1 Service Class 1 Commands.........................................................................................11-3
Table 11-2 MOD Parameters.........................................................................................................11-4
Table 11-3 Service Class 2.0 Commands .....................................................................................11-5
Table 11-4 Status Report Result Codes.........................................................................................11-9
Table 12-1 Voice AT Commands ...................................................................................................12-1
Table 12-2 Voice Shield DTE Command.......................................................................................12-2
Table 13-1 Data Type Description .................................................................................................13-4
Table 13-2 Output Value Description.............................................................................................13-5

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Preface
About Your Modem
Congratulations on the purchase of your U-90E modem - one of ZyXEL's premier high-
performance products. The U-90E modem is world renown for its ability to maintain ultra
high speeds and clear, quality connections while communicating around the globe.
About This Manual
This manual describes the use of your U-90E data/fax modem and gives instruction for its
installation and operation.
Structure of this Guide
This manual is divided into four sections:
•Getting Started (Chapters 1-4) gives a basic overview of your modem’s features,
explains its installation procedures and introduces you to the basic commands and
techniques involved in modem operation.
•Settings and Commands (Chapters 5-6) provides an overview of the settings and
commands which are available in the U-90E modem.
•Additional Functions (Chapters 7-13) describes many special functions and features of
the U-90E modem in detail, including error control and data compression, leased-line
and synchronous mode operation, remote configuration, caller ID, fax sending and
receiving, voice mail and diagnostic features.
•Upgrading and Troubleshooting (Chapters 14-15) provides information about
upgrading your modem and solving common problems.

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Becoming a Registered Owner
Complete the pre-addressed Warranty Registration Card and place it in the mail.
Registered owners will receive future product information and update announcements.
Warranty registration is not necessary for product repair/or replacement. Save your dated
invoice as proof of purchase.