Zoom ISDN TA User manual

ISDN Terminal Adapter
Owner’s Manual

ii ISDN TA Owner’s Manual
NOTICE
This document contains proprietary information protected by copyright,
and this Owner’s Manual and all the accompanying hardware are copy-
righted. All rights are reserved. No part of this document may be photo-
copied or reproduced by mechanical, electronic, or other means in any
form, except for the personal use of the owner.
The manufacturer does not warrant that the hardware will work prop-
erly in all environments and applications.
Although the hardware has been tested, the manufacturer makes no
warranty and representation, either implied or expressed, with respect to
the hardware and the documentation, quality, performance, merchant-
ability, or fitness for a particular purpose. The manufacturer reserves the
right to make changes to the hardware and Owner’s Manual content
without obligation to notify any person or organization of the revision or
change.
All brand and product names are the trademarks of their respective
owners.
Copyright 1998
All rights reserved.

Contents iii
Contents
ABOUT THIS GUIDE ...............................................................5
DOCUMENTATION CONVENTIONS............................................... 5
CHAPTER 1 INTRODUCTION...............................................6
FEATURES................................................................................. 6
ISDN TECHNOLOGY ................................................................. 7
What Is It?........................................................................... 7
How It Works....................................................................... 7
SETTING UP ISDN SERVICE....................................................... 9
Setting Up Phone Numbers .................................................. 9
CHAPTER 2 INSTALLATION.............................................. 11
WHAT YOU NEED TO INSTALL THE ISDN TA........................... 11
INSTALLING THE HARDWARE ................................................... 12
Handset Installation........................................................... 14
SETTING UP IN WINDOWS 95.................................................... 15
PROBLEMS WITH PLUG AND PLAY SETUP .................................. 17
Using the Hardware Conflict Wizard.................................. 17
SETTING UP IN WINDOWS 3.1 OR 3.11...................................... 19
A Note About IRQs and Conflicts....................................... 20
SETTING UP IN WINDOWS NT .................................................. 22
CHAPTER 3 SOFTWARE CONFIGURATION................... 24
GENERAL TIPS FOR SETTING UP COMMUNICATION SOFTWARE... 24
Tips for Selecting Setup Options ........................................ 24
INITIALIZATION, RESET, DIAL, AND ANSWER SETTINGS............ 25
Using an ISDN Line for Voice Calls................................... 26
Using an ISDN Line to Call an ISDN Data Device
(remote server)................................................................... 26
CONFIGURING VOICE CONNECTIONS ........................................ 27
CONFIGURING DIAL-UP NETWORKING...................................... 28
Using ML-PPP and PPP Connections in Windows 95 ........ 28
Using PPP Connections in Windows 3.1 or 3.11 ................ 31
Using ML-PPP Connections in Windows 3.1 or 3.11.......... 32
Using ML-PPP and PPP Connections in Windows NT........ 32

iv ISDN TA Owner’s Manual
CHAPTER 4 PROBLEMS AND SOLUTIONS......................35
GENERAL TROUBLESHOOTING..................................................35
ISDN LINE CONNECTIONS .......................................................37
ML-PPP CONNECTIONS...........................................................38
VOICE CONNECTIONS...............................................................39
APPENDIX A: PRODUCT SUMMARY .................................40
APPENDIX B: PRODUCT SPECIFICATIONS......................42
APPENDIX C: CHANGING THE COM
SETTINGS IN BIOS.................................................................43
APPENDIX D: ISDN SERVICE INFORMATION .................45
APPENDIX E: SETTING UP ISDN SWITCHES...................46
Using National ISDN 1 Switches ........................................47
Using Northern Telecom DMS100 Switches........................47
Using AT&T Custom 5ESS Switch ......................................48
APPENDIX F: REGULATORY INFORMATION .................49
FCC PART 68 TELECOMMUNICATIONS STATEMENT ..................49
INDUSTRY CANADA ATTACHMENT ...........................................50
CANADIAN EMISSIONS STATEMENT ..........................................51

About This Guide 5
About This Guide
This manual is a guide for the installation of the ISDN Terminal
Adapter, referred to hereafter as the ISDN TA. Once you have success-
fully installed it in your IBM PC-compatible computer, virtually all
access to the product features is through easy to use point-and-click
software included with this product.
This guide is organized as follows:
Introduction (Chapter 1) describes the product and its features, talks
about the technology behind ISDN, and provides a brief explanation on
how you can take full advantage of the product’s high-speed digital
capability.
Installation (Chapter 2) lists the items required for installation and
explains installation and configuration.
Configuration (Chapter 3) provides tips for setting up your communi-
cations software for ISDN lines.
Problems and Solutions (Chapter 4) provides troubleshooting infor-
mation.
The Appendixes provide additional information for a number of topics
including ISDN service, product specifications, and AT command
summaries.
Documentation Conventions
•Commands and command examples described in this guide appear
in bold type. For example: To reset the ISDN TA, type ATZ and
press Enter.
We occasionally insert spaces between commands to make a command
line easier to read. You can type the command line with or without
spaces between commands as long as the command line does not ex-
ceed 255 characters (spaces count as characters).
•The letter O is shown in lower case (o or o)in a command line. The
number zero is shown as 0.

6ISDN TA Owner’s Manual
Chapter 1 Introduction
Congratulations! You have purchased an advanced, flexible product
that incorporates the latest high speed digital telecommunications tech-
nology.
The product supports ISDN operation up to 128 Kbps, and includes a
handset port for voice calls over ISDN.
The ISDN TA is “Plug and Play” (PnP) compatible and software con-
figurable, so installation is fast and easy if you are using Windows 95,
Windows 3.1 or 3.11, or Windows NT 4.0 or higher.
Note: You must be running Windows NT version 4.0 or higher and
a Plug and Play (PnP) BIOS in order to use these products
under Windows NT. To find out whether you have a PnP
BIOS, look for a PnP version number during startup or refer to
your computer documentation. You must also install a special
PnP driver from your NT installation CD. See Chapter 2.
Features
This product includes:
•An ISDN terminal adapter card.
•Built-in NT-1 termination (no additional hardware required for
normal ISDN installation).
•On-board 16550 UART with local RAM buffers and support for 7
interrupts.
•Standard AT command set for compatible with ISDN extensions
for maximum interoperability with all of your PC applications
software.
•Standards-based solution through support of standard protocols:
V.110, V.120 Rate Adaptation up to 64 Kbps, Point-to-Point Pro-
tocol (PPP) at 64 Kbps, and Multilink PPP (ML-PPP) at 128 Kbps
using two channels.
•Plug and Play compatibility support for easy installation for Win-
dows 95 users; PORTWIZ software card configuration for easy in-
stallation under Windows 3.1 and 3.11 systems.

Chapter 1 Introduction 7
•Flash memory for code updates via software downloads.
•Simultaneous voice and data capability, with voice on one B-
channel and data on the other.
•This product may also include an optional telephone handset for
making or receiving voice calls over an ISDN line.
ISDN Technology
What Is It?
Integrated Services Digital Network (ISDN) is a technology that uses
digital transmission instead of analog transmission over standard tele-
phone lines. Among the many advantages of ISDN service are the fol-
lowing:
•ISDN’s digital technology service provides faster and more reliable
data transfers.
•ISDN’s connection and negotiation are much faster than with
analog modems. Typical connection time for an ISDN call is under
three seconds.
•ISDN’s maximum high speed doesn’t depend on line quality.
•ISDN’s service allows you to connect to two different communica-
tions devices, such as a telephone and ISDN terminal adapter, at
the same time, while analog provides a single connection at a time.
How It Works
While both technologies use the same type of copper wire connection
between your house and the phone company, ISDN Basic Rate Interface
(BRI) service converts information flow into three channels, two B-
channels and one D-channel, referred to as 2B+D service. The two B-
channels have a bandwidth of 64 Kbps each. These two channels may
be used independently (for voice, fax, data or video), or they may be
bound together (bonded) to provide a single 128 Kbps connection.

8ISDN TA Owner’s Manual

Chapter 1 Introduction 9
An ISDN connection enables you to have a conversation with someone
using one B-channel while you are connected to the Internet using the
other B-channel. The D-channel is typically used to carry network con-
trol and status information such as dialed numbers, and answer and
hang-up information. An analog connection only provides a single
channel (voice, fax, or data).
Setting Up ISDN Service
To use ISDN you must contact your local phone service provider to get
the service started. ISDN is connected through standard phone wires,
just like an ordinary analog line. The telephone wiring coming into
most homes has four wires. Each analog or ISDN line requires two
wires. If you have only one telephone line now, ISDN can usually be
installed on the remaining two wires without additional wiring. If you
have two analog lines now and you don’t plan to replace the second line
with ISDN, you will probably need to have a new ISDN line installed.
Business installations depend on the type of equipment, number of in-
stalled lines, and other factors. Your telephone company business office
can assist you in determining the best ISDN installation alternative.
Appendix D lists phone numbers for regional Bell operating companies
that offer ISDN service.
Setting Up Phone Numbers
When ordering ISDN service from your phone company you should
request two ISDN phone numbers, called Directory Numbers (DNs).
They are the numbers people will use to dial the two channels of your
ISDN TA. Typically you would use one DN for data (remote access and
fax) and the other for voice calls.
In ordering ISDN service you may get Service Profile Identifier num-
bers (SPIDs) for each DN. Usually the SPIDs are necessary in config-
uring your network connection.
You will also need to ask the phone company which switch type you
will be connected to. You need to know which switch type in order to
properly set up your ISDN connection.
This product has been tested for support of EZ-ISDN. If your local
phone company supports it, EZ-ISDN is a fast, easy way to order ISDN
service.
We have made it very simple for you to request ISDN service by using
the ISDN Service Installation Flyer included in your package. Refer to
this flyer during the process of ordering service.

10 ISDN TA Owner’s Manual
For more information on setting up ISDN switches, see Appendix E.

Chapter 2 Installation 11
Chapter 2 Installation
This chapter describes installation in computers running either Win-
dows 95 , Windows 3.1 or 3.11, or Windows NT. If you are installing
your TA in a computer running Windows NT 4.0, please follow the
instructions below before installation.
Your computer should be located near an ISDN jack.
Special Instructions for Windows NT 4.0
While Microsoft has not formally implemented Plug and Play for Win-
dows NT 4.0, the installation CD-ROM for both the Workstation and
the Server version of the operating system contains a special driver that
will enable Plug and Play. You must install this special driver before
installing your ISDN TA.
Follow these steps to install the driver:
1. Insert your installation disc into your CD-ROM drive. If Auto-
Play is activated, you will need to click on the Browse button.
2. Navigate to the following subdirectory: Drivelib\Pnpisa\X86.
3. Find the following file and click on it with your secondary
mouse button (usually the right button): Pnpisa.inf.
4. When the pop-up menu appears, select Install. The Plug and
Play driver will be installed on your hard drive.
5. Remove your installation disc and put it in a safe place.
What You Need to Install the ISDN TA
Make sure that you have received the following items:
•Your ISDN TA.
•An RJ-11 to RJ-45 phone cord (with a small plastic plug on one
end and a large plastic plug on the other) to connect the TA to the
ISDN (digital) wall jack.

12 ISDN TA Owner’s Manual
•Communications software and documentation on disks or on a
CD-ROM. These disks also have some utilities that can help with
problematic installations in non-Plug and Play systems.
•Packet of online services.
You may also have received:
•A standard voice handset with connecting cord (included). (You
can also use your favorite handset or headset but not a telephone.)
To use the ISDN TA, you also need the following:
•An ISDN line connection (typically a wall-mounted telephone jack
or socket).
•A 486 or faster computer with an available full-size IBM PC-
compatible 16-bit ISA slot, 8 MB RAM, a 3.5"disk drive, hard
drive with at least 5 MB available and Microsoft Windows 3.1,
3.11, Windows 95 or higher, or Windows NT Version 4.0 or
higher. A mouse is recommended.
Note: For Windows NT you must have a Plug and Play BIOS.
•A tool, if necessary, for removing and putting back the computer
cover. (See your computer’s manual.)
Installing the Hardware
1. Turn off and unplug your computer. Do not plug it back in or
turn it on until you finish the installation.
2. Carefully take the cover off your computer. If you need help,
refer to your computer’s manual.
3. Touch a metal surface to discharge static electricity. Static
electricity can damage computer and TA components.
4. Plug your ISDN TA into an available 16-bit ISA-compatible
slot inside. See the following illustration.

Chapter 2 Installation 13
16-bit slot
5. Connect the ISDN line. Plug the RJ-45 connector (the larger
end) of the RJ-11 to RJ-45 cord into the jack on the card marked
ISDN. Plug the RJ-11 connector of the cord into the ISDN wall
jack. You do not need an NT-1.
6. Connect the Handset (optional). If a handset is included with
the product, plug the handset, or a headset or other handset (but
not a telephone), into the RJ-14 jack on the card marked
HANDSET. You may also use a standard hands-free headset.
The next diagram shows how all the connections should look.

14 ISDN TA Owner’s Manual
7. Replace the cover on the computer.
8. Plug in the computer and turn it on.
Handset Installation
Your ISDN TA package may contain an optional telephone handset for
use at your desktop computer. Included for your convenience are a
handset hook and a handset cord retainer.
Use the handset hook to locate the handset in a convenient place on the
side of your monitor.
The cord retainer prevents stress on the handset cord’s connection at the
rear of your computer.

Chapter 2 Installation 15
To attach the handset hook and cord retainer, peel the protective
paper off the adhesive backs and press them to one side of your
monitor. Be sure to align the the bottom of the hook horizontally with
your desk’s surface so that the handset hangs straight down.
You are now ready to configure the ISDN TA using the included soft-
ware. Depending on the version of the Windows operating system you
are running, go to the appropriate setup section that follows.
Setting Up in Windows 95
This section is for Windows 95. If you have Windows 3.1 or 3.11,
please go to page 19. If you have Windows NT, please go to page 22.
The Plug and Play feature of the Windows 95 operating system auto-
matically detects your ISDN TA and allocates hardware resources with
no need for you to set a COM port or IRQ setting.
To complete configuration, follow these steps:
1. Turn your computer on.
2. As the Windows 95 operating system starts up, a New Hard-
ware Found box is displayed. The first line of this box should
show the name of this product.
3. In the New Hardware Found box, there are three choices for
installing a “driver.” The default is for the driver to be installed
from a disk provided by the hardware manufacturer. Make sure
this choice is highlighted and click OK.

16 ISDN TA Owner’s Manual
4. An Install From Disk box appears and lists A:\ as the default
drive.
If you have received a Utilities disk, insert it into your disk
drive. Otherwise insert the CD-ROM disc into the CD-ROM
drive. Make sure the correct drive is designated in the Install
From Disk box, and click OK.
5. Windows 95 then continues its startup procedure. Once the
system is completely booted up, determine what COM port your
modem is set to. To do this, open the My Computer icon on
your screen (if it’s not already open). In the My Computer
dialog box, double-click the Control Panel icon. Inside the
Control Panel dialog box, double-click the Modems icon.
6. In the Modems Properties box, select this product, which
should be listed as a modem found by the system. Then click the
Properties button. Your modem’s properties are listed in a
Properties dialog box. Next to Port is shown a COM number.
Make a note of this COM port number below or write it in an
easy-to-find place.
COM port ___________
7. While still in the Modem Properties dialog box, test the ISDN
TA by clicking on the Diagnostics tab. Choose More Info. You
will see a list of responses. A list for ATI 1-12 confirms your
ISDN connection. Ignore any Error responses. Click OK.
8. Close both Properties windows by clicking OK until you get
back to the Control Panel.
Your ISDN TA hardware is installed!
Now install and set up your software. Follow the instructions in the
Quick Start guide or software user’s manual that came with the soft-
ware. If you need additional help, see the section Tips for Selecting
Setup Options in the next chapter.
You may also want to review the section about Dial-Up Networking
using ML-PPP or PPP in Windows 95, which begins on page 28.

Chapter 2 Installation 17
Problems with Plug and Play Setup
If your setup doesn’t proceed properly, read and perform the following
steps before calling Technical Support.
Using the Hardware Conflict Wizard
Windows 95, with its Plug and Play feature, is a major improvement
over previous versions of Windows. But under some circumstances,
Plug and Play may not resolve all installation problems.
The ISDN TA provides seven IRQs, which should ensure its installa-
bility. However if you have a lot of other hardware installed in your
computer, you may still have difficulty installing your ISDN TA quickly
and simply. Conflicts may arise when you have a sound card installed,
or a graphics tablet, a second printer, or a combination of these due to
insufficient COM port and interrupt (IRQ) resources.
The Windows 95 Help system has an excellent tool (called a “wizard”)
for thoroughly diagnosing and solving many of these problems. To use
this procedure, do the following:
1. Double-click the My Computer icon on your desktop.
The system displays the My Computer window.
2. Choose the Help Topics command in the Help menu.
Windows 95 displays the Windows Help dialog box.
3. Select the Index tab.
4. Type:
plug
Windows Help automatically scrolls to Plug and Play hard-
ware.
5. Under the topic Plug and Play hardware, select Trouble-
shooting.
6. Click the Display button.
7. Windows Help displays the Hardware Conflict Trouble-
shooter.
8. Follow the instructions for determining if there is a hardware
conflict and resolving the conflict.

18 ISDN TA Owner’s Manual
If you still have problems, it probably means that although you are run-
ning Windows 95, which supports Plug and Play, you may have an
older computer that is not completely compatible with this feature. Go
to Appendix C: Changing the COM Settings in BIOS, for further in-
structions.

Chapter 2 Installation 19
Setting Up in Windows 3.1 or 3.11
1. Insert the Utilities Disk in your floppy drive or CD-ROM in
your CD-ROM drive.
2. From the DOS prompt, type A:\ (or the letter of the correct drive)
and press Enter. At the A:\ prompt, type cd setport and press En-
ter. This opens the SETPORT directory. (SETPORT runs the
PORTWIZ utility.)
This directory contains utilities that help you configure your TA’s
COM port and IRQ settings.
3. Type setport 3 and press Enter. The program tries to set up the
TA on COM 3. In almost all circumstances, SETPORT 3 suc-
cessfully sets the TA to COM 3 and a free IRQ, usually 12 or
11.
Once the program finds a free IRQ, it tries to communicate with
the TA using these settings. If successful, the program asks if
you want it to automatically modify your AUTOEXEC.BAT
and SYSTEM.INI files.
We strongly recommend that you answer Yes to these prompts;
otherwise, you will need to run the SETPORT utility each time you
reboot your computer.
If unsuccessful, SETPORT checks more IRQs until it finds one
that works. SETPORT checks the following IRQs in order: 12,
11, 10, 7, 5 and 4.
If you don’t get an error message at this point and your
computer does not start behaving erratically, skip to step 5;
your hardware is installed.
If you do have a problem, continue below.
4. Repeat step 3, but use COM 4 (i.e., type setport 4 and press
Enter). If COM 4 results in an error message, try COM 1 and
then COM 2.
Even if SETPORT is successful, you may still run into a conflict
with another peripheral, such as a mouse, a video card, or a
sound card. This may happen because SETPORT is unable to
tell that a particular IRQ setting is already assigned to another
device if that device is not being used at the time. If you get er-
ratic behavior, such as inconsistent TA performance or a piece
of hardware that stops working even though it worked before,

20 ISDN TA Owner’s Manual
read the following section, A Note About IRQs and Conflicts, for
suggestions.
5. Write down the COM port and IRQ setting of your TA below or in
another easy-to-find place. The information is important because you
may need to use it in setting up your software applications.
COM port: _______________________________
IRQ setting: _____________________________
Your hardware is installed!
Now install and set up your software. Follow the instructions in the
Quick Start guide or software user’s manual that came with the soft-
ware. If you need additional help, see the section Tips for Selecting
Setup Options in the next chapter.
You may also want to review the section Using PPP for Windows 3.1 or
3.11, which begins on page 31, or Using ML-PPP for Windows 3.1 or
3.11, which begins on page 32.
A Note About IRQs and Conflicts
Note: The IRQs supported by the ISDN TA are 3, 4, 5, 7, 10, 11,
and 12.
While SETPORT (which runs PORTWIZ) does its best to configure
your TA on a free IRQ, it is possible that another piece of your hard-
ware also is configured to use that IRQ. That is why the programs first
try to query the IRQs least likely to be used by your system.
In the unusual event that PORTWIZ configures your TA to use a COM
port/IRQ combination that conflicts with other hardware, either the TA
or the other hardware won’t work properly. If that happens, you can run
PORTWIZ by itself to try other COM port/IRQ combinations.
Setport copies PORTWIZ into the root directory (usually C:\) the first
time you run it. After that, you can run PORTWIZ from the DOS
prompt. You can specify a COM port and IRQ for PORTWIZ to try; the
command format is:
PORTWIZ <COM port hex address><IRQ num-
ber(s)></w>
where the COM port hex addresses are: