Zoom 2812 User manual

56K Owner’s Manual
56Kbps/V.34 Data with 14.4Kbps Fax

NOTICE
This document contains proprietary information protected
by copyright, and this Owner’s Manual and all the accom-
panying hardware are copyrighted. All rights are reserved.
No part of this document may be photocopied 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 properly 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 documen-
tation, quality, performance, merchantability, 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 1997
All rights reserved.

iii
Contents
INTRODUCTION..........................................................5
WHAT YOU NEED TO USE YOUR FAXMODEM .........................6
DOCUMENTATION CONVENTIONS..........................................7
CHAPTER 1 INSTALLATION....................................... 8
INSTALLING AN EXTERNAL FAXMODEM ..................................8
INSTALLING AN INTERNAL FAXMODEM .................................12
Installing an Internal Card in Your Computer.............12
SETTING UP YOUR FAXMODEM FOR WINDOWS 95................15
PROBLEMS WITH PLUG AND PLAY SETUP .............................16
Using the Hardware Conflict Wizard..........................16
Changing the COM settings in BIOS ..........................17
SETTING UP YOUR INTERNAL FAXMODEM WITH
SOFTWARE UNDER WINDOWS 3.1 OR 3.11.........................19
A Note About IRQs and Conflicts ...............................20
SETTING UP YOUR INTERNAL FAXMODEM WITH JUMPERS ......22
For MS-DOS Users ....................................................22
For Windows 3.1 or 3.11 Users.................................23
For Windows NT Users..............................................23
CHAPTER 2 USING THE FAXMODEM ......................25
USING FAX AND DATA COMMUNICATIONS SOFTWARE ............25
Tips for Selecting Setup Options ................................25
INITIALIZATION STRINGS....................................................26
USING AT COMMANDS.....................................................27
RETURNING TO THE FACTORY SETTINGS..............................29
CHAPTER 3 PROBLEMS AND SOLUTIONS ...............30
GENERAL TROUBLESHOOTING ...........................................31
ECHO TROUBLESHOOTING ................................................34
DIAL TROUBLESHOOTING..................................................34
ON-LINE TROUBLESHOOTING.............................................35
APPENDIX A: 56K – QUESTIONS & ANSWERS .......... 40
APPENDIX B: PRODUCT SUMMARY..........................42
APPENDIX C: PRODUCT SPECIFICATIONS ...............44

iv
APPENDIX D: JUMPER SETTINGS FOR
INTERNAL MODEMS................................................. 45
JUMPER BLOCK LOCATIONS ..............................................45
FOR WINDOWS 95 USERS ................................................46
FOR WINDOWS NT AND OTHER NON-PNP USERS ................46
PORT AND IRQ SETTINGS .................................................47
APPENDIX E: AT COMMANDS...................................48
APPENDIX F: S REGISTERS......................................55
APPENDIX G: RESULT CODES.................................. 59
APPENDIX H: REGULATORY INFORMATION.............62
FCC PART 68 TELECOMMUNICATIONS STATEMENT...............62
INDUSTRY CANADA ATTACHMENT .......................................63
CANADIAN EMISSIONS STATEMENT .....................................64
INDEX ......................................................................65

Introduction 5
Introduction
Congratulations! Your 56K Faxmodem is a powerful, flexi-
ble tool that will help you manage your communications,
work more efficiently, and present a polished and profes-
sional image at home or at the office.
This product includes high-speed data and fax capability
with the ability to receive data from compatible central
sites at speeds up to 56 Kbps, and even higher rates
using data compression.
As discussed in Appendix A, your faxmodem’s ability to
achieve speeds above 33,600 bps depends on your calling
a compatible central site such as a compatible Internet
Service Provider (ISP), online service, or corporate net-
work. It also depends on the characteristics of the phone
line connecting your modem to the local telephone office.
Your 56K Faxmodem can also perform as a top-of-the-line
V.34 data and fax modem, operating at speeds up to 33.6
Kbps.
This manual is primarily an installation, troubleshooting,
and reference guide. Once you have successfully installed
the modem in your IBM PC-compatible computer,
software controls virtually all access to the fax and data
product features.
While many data communications features can be con-
trolled using AT commands and S registers, there is
rarely any reason to do so. The software shipped with this
product allows you to change your modem’s configuration
and to control the communications features easily.
Summaries of AT commands and S registers have been
included in this manual primarily for programmers and in
the interest of tradition and completeness.
The use of AT commands and S registers is neither re-
quired nor recommended for the average user.

656K Faxmodem Owner’s Manual
This owner’s manual is organized as follows:
Introduction (this section) lists the items you will need
to use the modem.
Installation (Chapter 1) explains how to install the modem.
Using the Faxmodem (Chapter 2) provides tips for
setting up your software.
Problems and Solutions (Chapter 3) provides
information to assist you if you have problems.
The Appendixes provide additional information for a
number of topics including tables that summarize AT
commands and S registers.
Follow the Quick Start guide’s instructions for quick in-
stallation of the hardware and software that is included
with this product. If you have questions that are not an-
swered in the Quick Start guide, follow the instructions
provided with your fax and data communications software
to install and use those programs.
What You Need to Use Your Faxmodem
Make sure that you have received the following
items:
• Faxmodem
• Phone cord
• Power adapter (for external models only)
• Fax and data communications software on floppy
disks. These floppies also contain some helpful
installation utilities for non-Plug and Play systems.
To use the faxmodem, you also need the
following:
• For internal models, a computer with an available
IBM PC-compatible 16-bit ISA or EISA Bus slot.
• For external models, an available serial port (also
called an RS-232 port, COM port, or modem port).

Introduction 7
• A serial cable with hardware flow control (external
model only).
• A telephone line connection (typically, a wall-mounted
telephone jack or socket) that lets you plug in a
single-line telephone.
• A tool, if necessary, for removing and putting back the
computer cover (internal model only). (See your
computer’s manual.)
Documentation Conventions
• In this manual we may use the terms “faxmodem,”
“modem,” and “product” interchangeably.
Occasionally you may find that other manuals use the
term “modem board” or “card” to refer to the modem.
• Commands and command examples described in this
guide appear in bold type. For example: To reset the
modem, type ATZ and press Enter.
• Occasionally we 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
exceed 40 characters.
• “0” in a command line indicates the number zero, not
the letter “O”.

856K Faxmodem Owner’s Manual
Chapter 1 Installation
This chapter explains how to install external and internal
faxmodems.
Installing an External Faxmodem
To connect the external faxmodem
Turn off the computer.
Connect the faxmodem-to-computer cable. Plug one
end of the cable into the wide connector on the back
of the faxmodem. Plug the other end into the serial
port in the back of your computer.
Connect the telephone cord. Plug one end of the
cord provided with the modem into the PHONE LINE
jack on the back of the faxmodem. Plug the other end
into the telephone line connection (typically mounted
on a wall), just as you would a standard telephone.
You can plug a telephone into the faxmodem’s other
jack, marked PHONE. The faxmodem works with or
without a telephone connected to it.
Connect the power adapter. Plug one end of the
power adapter into the back of the faxmodem. Plug
the other end into an available electrical outlet. You
can leave the power adapter plugged in when you are
not using the faxmodem.
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Chapter 2 Using the Faxmodem 9
TELEPHONE
(OPTIONAL)
TELEPHONE LINE
COMPUTER
POWER
CONNECTION
Turn the computer back on.
Turn the faxmodem on by pushing in the power
button on the front, as shown in the illustration
below.
The modem performs a brief self-test.
After the self-test, the front panel status lights or
LEDs show the faxmodem’s current state. The MR
light should be on, which shows the faxmodem is
ready for use.
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10 56K Faxmodem Owner’s Manual
Now you can install your fax and data communica-
tions software. Follow the instructions provided with
the enclosed software, and turn to Chapter 2.

Chapter 2 Using the Faxmodem 11
Summary of the Indicator Lights
(external modems only)
Light Description
OH (Off Hook) Lights when the faxmodem is off hook.
AA (Auto-Answer) Blinks on or off when detecting incoming
ring.
RD (Receive Data) Light flashes when data is sent from the
faxmodem to your computer or other serial
device. At high speeds light may appear on.
TD (Transmit Data) Flashes whenever data or commands are
transmitted from the serial port of your
computer or other device to the faxmodem.
TR (Terminal Ready) Lights when the computer is ready to send
or receive data. Indicates the status of the
DTR signal from the terminal or computer.
NOTE: This light does not work on a Mac,
because the Mac uses its control line for
hardware flow control.
CD (Carrier Detect) Lights when the Data Carrier Detect (DCD)
signal from the faxmodem to the computer
is on.
CS (Clear to Send) Lights when the faxmodem can accept data
from the computer. The light will turn off
when the faxmodem is set for flow control
(AT command &K3) and the faxmodem’s
data buffer is full, preventing data flow from
the computer.
EC (Error Correction) Lights when sending data using V.42 or
MNP 4 error correction.
DC (Data Compression) Lights when using V.42bis or MNP 5 data
compression.
V.34 Lights when operating in V.34 mode.
K56 Lights when communicating in K56Flex™
mode.
FAX Lights when fax connection has been made
to a remote faxmodem.
MSG Used by some software products. Lights
when faxes are waiting.
MR (Modem Ready) Lights when the faxmodem is turned on.
Flashes when the faxmodem is in self-test
mode.

12 56K Faxmodem Owner’s Manual
Installing an Internal Faxmodem
CAUTION
Do not handle any internal modem card when the phone
line is plugged into it. The voltages present when the line
is ringing are potentially harmful.
If you ever need to remove the card from your computer
for any reason, simply remove the phone line from the
internal card before handling it.
IMPORTANT NOTICE
If you use Windows 95
As it comes from the factory, your internal faxmodem is
Plug and Play compatible with Windows 95. You don’t
need to move any jumpers on the board.
If you use Windows 3.1 or 3.11
We recommend that you set up your faxmodem with
jumpers by skipping to page 22 before continuing with
step 1 below. You also may choose to set up this
faxmodem using the software procedure beginning on
page 19, but this may cause problems if you have another
software-configured card in your computer. If you still
want to use software configuration, continue with step 1
below.
If you use Windows NT or MS-DOS
To configure the card for use with a Windows NT Server
or Workstation, you must set one or more jumpers before
installation. Skip to For Windows NT Users, page 23,
before continuing with step 1 below.
Installing an Internal Card in Your Computer
Before you start the hardware installation, turn
your computer off and unplug it. Don't plug it back
in or turn it on until you complete the faxmodem
1

Chapter 2 Using the Faxmodem 13
hardware installation. Remember, your computer
should be located near a phone jack.
Take the cover off your computer. This is a little
different for every computer. If you are not familiar
with the procedure, consult your computer's manual
for more detailed instructions.
Locate an available 16-bit slot (see the illustration
below).
Note that the faxmodem has two sections of gold con-
necting fingers. A 16-bit slot has double connectors to
match the fingers.
Unscrew and remove the metal cover plate on the
rear of the computer that lines up with the 16-bit slot.
This plate is similar to the bracket on the faxmodem.
Put the plate and screw aside.
Plug the faxmodem firmly into the 16-bit slot. Be
sure that the bracket is lined up properly, then screw
the bracket into the computer with the screw you re-
moved with the cover plate.
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14 56K Faxmodem Owner’s Manual
16-bit slot
(double
connector)
8-bit slot
(single
connector)
Typical
cover
plate
Replace the computer cover.
Connect the telephone cord.
Plug one end of the phone cord
into the jack marked LINE. Plug
the other end into a phone jack
(where you would normally con-
nect a phone).
You can also plug a regular
telephone into the jack marked
PHONE. The telephone shares
the phone line with the fax-
modem and works as a normal telephone when the
faxmodem is not in use.
Plug in your computer and turn it on.
If you set up your modem using jumpers (all MS-
DOS and most Windows 3.1 and 3.11 users), your
modem is installed and you can move on to Chapter
2. If you are running Windows NT, return to page
6
7
PHONE (optional)PHONE (optional)
LINELINE
LINE
PHONE
8
9

Chapter 2 Using the Faxmodem 15
24. If you are running the Windows 95, proceed to
the next section.
Setting Up Your Faxmodem for Windows 95
If you are running Windows 95, your faxmodem is auto-
matically detected by the Plug and Play feature of the
Windows 95 operating system. Follow the procedure
below to complete your faxmodem setup.
Restart your computer. As the Windows 95
operating system boots up, it displays a New
Hardware Found dialog box on your screen for a few
seconds with the identifier name (Internal 56K
Faxmodem (PNP) or something similar) of your
faxmodem.
In the New Hardware Found dialog box, you have three
choices for installing a “driver.” The default choice is for
the driver to be installed from a disk provided by the
hardware manufacturer. Highlight this selection if it’s
not already highlighted and click OK.
Win95 displays an Install from Disk dialog box. It
lists A:\ as the default drive.
Make sure that correct drive is designated in the
dialog box (A: is probably correct). Insert the COMit
Disk in the drive and click OK.
Windows 95 auto-detects the correct files and copies
them.
Windows 95 continues its startup procedure. Once
the system is completely booted up, you should
determine what COM port your faxmodem is set to. To
do this, double-click the My Computer icon. When the
My Computer window opens, double-click the Control
Panel icon. Inside the Control Panel window, double-
click the Modems icon. In the Modems Properties dia-
log box, select this product, which should be listed as a
modem found by the system. Then click Properties.
Your faxmodem’s properties are listed in a Properties
dialog box. In the Port box, it lists your Communica-
tions Port and then, in parentheses, the COM number.
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16 56K Faxmodem Owner’s Manual
Make a note of this port setting and write it in the
Important Information table in the Quick Start (or in
some other easy-to-find place). The COM port informa-
tion is important because you will be asked to set the
COM port when you configure your software applica-
tions.
If you’ve encountered no problems, your modem is
installed and you can move on to Chapter 2. If you are
having problems, continue below.
Problems with Plug and Play Setup
If this setup doesn’t proceed properly, read and perform
the following steps before calling Tech Support.
Using the Hardware Conflict Wizard
Windows 95, with its Plug and Play feature, is a major im-
provement over previous versions of Windows. But under
some circumstances, Plug and Play may not resolve all in-
stallation problems.
For example, if you have a lot of optional hardware in-
stalled in your computer, you can still encounter a prob-
lem installing your modem. Conflicts may arise when you
have a sound card installed, or a graphics tablet, a
second printer, or a combination of these. The problem is
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
your problems. To use this procedure, do the following:
Double-click the My Computer icon on your desktop.
The system displays the My Computer window.
Choose the Help Topics command in the Help menu.
Windows 95 displays the Windows Help dialog box.
Select the Index tab.
Type:
1
2
3
4

Chapter 2 Using the Faxmodem 17
plug
Windows Help automatically scrolls to Plug and Play
hardware.
Under the topic Plug and Play hardware, select
troubleshooting.
Click the Display button.
Windows Help displays the Hardware Conflict
Troubleshooter.
Follow the instructions for determining if there is a
hardware conflict and resolving the conflict.
This should cure your problem. If it does, your
faxmodem hardware is installed! Remember to write
down your COM port and IRQ settings. Turn to Chapter 2
to learn about using your modem with fax/data software.
If you still have problems, it probably means that
although you are running Windows 95, which supports
Plug and Play, you may have an older computer that is
not completely compatible with this feature. Try the steps
in the next section.
Changing the COM settings in BIOS
This procedure is a little more difficult than the previous
one, but with the help of your computer’s documentation
you should be able to clear up any remaining problems.
In your computer’s documentation, find the section on
the BIOS Setup program. (BIOS stands for Basic
Input/Output System.)
Shut down your computer and restart it.
Enter the BIOS Setup program, as described in your
computer’s documentation, and disable COM2.
NOTE: Some computers may not use the BIOS
settings to control the COM ports. Check your com-
puter’s documentation to see if you have to reset the
computer’s jumpers or switches instead.
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18 56K Faxmodem Owner’s Manual
Write down and save the new COM port and IRQ
settings and exit Setup.
The BIOS automatically reboots your computer.
In Windows 95, choose Control Panel from the
Settings command in the Start
menu.
Double-click the System icon.
Click the Device Manager tab.
Find the Ports (COM & LPT) device and click the
sign.
This expands the device list under Ports.
Select Communications Port (COM2).
Click the Remove button in the Device Manager
window.
This removes the device currently assigned to COM2.
When Windows 95 displays the Confirm Device
Removal warning, Click OK.
Double-click Modem in the Device Manager window.
Double-click the Faxmodem icon for your model.
Click the Resources tab.
Uncheck the Use automatic settings checkbox.
Scroll through the Basic configuration options until
you find the one that displays the Input/Output
Range 02F8 - 02FF and Interrupt Request 03.
3
4
5
6
7
8
9
10
11
12
13
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Chapter 2 Using the Faxmodem 19
This is COM2. The Conflicting device list box should
say No conflicts. If there are conflicts, call Tech Support.
If there are no conflicts, close the Modem Properties
window, System Properties window, and Control
Panel window by clicking OK for each.
Restart Windows 95.
If Windows finds your other serial port, it may try to
assign the port to COM2, but won’t be able to because
your faxmodem is already using that system resource.
If you are successful at this point, you can move on to
Chapter 2.
Setting Up Your Internal Faxmodem with
Software Under Windows 3.1 or 3.11
As discussed on page 12, most Windows 3.1 or 3.11 users
are better off using jumpers to set up their internal
faxmodem. The following instructions are for users who
want to use software to configure their modem.
To run the SETPORT utility from your DOS prompt go to
the Program Manager, then go to the File menu and click
Close. Then follow these steps:
Insert the disk labeled COMit Disk 1 in your floppy
drive.
From the DOS prompt, type A:\ (or the drive letter of the
correct drive) and press Enter. At the A:\ prompt, type
cd setport and press Enter. This opens the SETPORT
directory.
This directory contains utilities that help you configure
your faxmodem’s COM port and IRQ settings.
Type setport 3 and press Enter. The program tries to
set up the faxmodem on COM 3. In almost all circum-
stances, setport 3 successfully sets the modem to
COM3 and a free IRQ, usually 12 or 11.
Once the program finds a free IRQ, it tries to commu-
nicate with the faxmodem using these settings. If suc-
cessful, the program asks if you want it to automati-
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3

20 56K Faxmodem Owner’s Manual
cally 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 use your modem.
If unsuccessful, the software checks more IRQs until
it finds one that works. The software checks the
following IRQs in order: 12, 11, 15, 10, 7, and 5.
If you don’t get an error message at this point and
your computer does not start behaving erratically,
skip to step 5; your faxmodem hardware is
installed.
If you do have a problem, continue below.
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 happens 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 erratic
behavior, such as inconsistent modem performance or
a piece of hardware that stops working even though it
worked before, read the next section, A Note About
IRQs and Conflicts, for suggestions.
Write down the COM port and IRQ setting of your fax-
modem in the Important Information page in the Quick
Start, or some other easy-to-find place. The information
is important because you may need to use it in setting
up your software applications.
If you are successful at this point, you can move on to
Chapter 2.
A Note About IRQs and Conflicts
While SETPORT.BAT and PORTWIZ.EXE do their best to
configure your faxmodem on a free IRQ, it is possible that
some of your other hardware is also configured to use
that IRQ. That is why the programs first try to query the
IRQs least likely to be used by your system.
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