USRobotics COURIER User Manual
COURIER
HIGH SPEED MODEM
Courier V.34 Dual Standard Fax
USER MANUAL
COURIER HIGH SPEED MODEMS
HOW TO USE THIS MANUAL
This manual contains operating instructions for Courier Dual
Standard V.34 and Courier V.34 modems.
These modems have many similar features except for the
signaling they use to connect with remote modems at high
speeds: V.32/V.32 terbo, HST, V.FC, or V.34. Courier HST Dual
Standard modems use any type of signaling, depending on the
type of remote modem. V.34 modems can connect at rates up to
28.8K bps.
Below is a brief description of the manual's contents.
• Chapter 1Operating and Compatibility Features
• Chapter 2Installation
• Chapter 3Internal Modem Installation
• Chapter 4Data Mode Commands
• Chapter 5Fax Mode and Call Selection
• Chapter 6Queries and Help commands to display
current settings, operational summaries, and other data
• Background information on protocols, error control,
and throughput
• Summaries and tables
• Alphabetical Command Summary
• Dial Security operations
• Troubleshooting
• Online synchronous and V.25 bis synchronous
operations
• Additional features such as HST Cellular and
voice/data switch
• Procedures for modem testing
• Procedures for upgrading your modem via software
downloads
• Glossary
• Warranty/Service/Certification information
ii How to Use This Manual
COURIER HIGH SPEED MODEMS
A NOTE ON COMMUNICATIONS SOFTWARE
If you're using a computer rather than a terminal, you need
communications software. Many brands are available, all of
which are based on the modem's AT command set.
Some users prefer their communications software to take
control of the modem, and are more comfortable with a
program that makes the modem almost transparent. Others
prefer a program that allows them to use the modem's AT
command set sometimes, and their software at other times,
depending on the task at hand. Review at least Chapter 4 so
that you have a basic understanding of the modem's requirements and operation.
How to Use This Manual iii
U.S. Robotics, the U.S. Robotics logo, and HST are registered
trademarks of U.S. Robotics, Inc. Courier HST Dual Standard
Fax, Courier V.32 terbo Fax, Total Control, and Adaptive Speed
Leveling (ASL) are trademarks of U.S. Robotics, Inc. V.Fast
Class and V.FC are trademarks of Rockwell International. Any
trademarks, tradenames, service marks or service names owned
or registered by any other company and used in this manual are
the property of their respective companies.
COURIER HIGH SPEED MODEMS
TABLE OF CONTENTS
How to Use this Manual ii
Table of Contents v
Limited Warranty ix
FCC Registration Numbers x
IC (Industry Canada) x
Connecting to the Telephone Company x
Radio and Television Interference x
For Canadian Modem Users xi
PART I. INSTALLATION AND OPERATION
Chapter 1Features and Compatibility
Introduction 1-1
Features 1-1
Compatibility 1-6
Fax Standards 1-7
Other Compatibility Features 1-7
Chapter 2External Modem Set-Up
Switches on the Modem 2-1
Front Panel Indicators on the Modem 2-2
Package Components 2-2
What You Need 2-2
An RS-232 Cable 2-2
Communications Software. . . 2-3
Telephone Adapter. . . 2-3
You Should. . . 2-3
Refer to Appendix F. . . 2-3
Refer to Appendix G. . . 2-4
Installing the Modem 2-4
Testing the Installation 2-6
Chapter 3Internal Modem Setup
Package Components 3-1
What You Need 3-1
Communications Software. . . 3-1
A Telephone Adapter 3-2
You Should. . . 3-2
Refer to Appendix F. . . 3-2
Refer to Appendix G. . . 3-2
Before Installing the Modem 3-2
Select a Serial Port 3-3
Select an Interrupt Request (IRQ) 3-4
Table of Contents v
COURIER HIGH SPEED MODEMS
Reset the Jumpers 3-5
Set DIP Switches 3-6
Installing the Modem 3-6
Testing the Installation 3-8
Chapter 4Data Mode Command Summary
Command Set Usage 4-1
Basic Commands 4-3
Dialing/Answering 4-4
Dialing 4-4
Dial Options 4-4
Cancel Dialing 4-6
Store Phone Numbers 4-7
Redialing 4-7
Answer Mode 4-8
Hanging Up 4-9
Setting/Using Defaults 4-11
Customizing NVRAM 4-12
Resetting the Modem 4-13
Configuration 4-13
Echo/Speaker 4-13
Result Codes 4-14
Additional Result Code Sets 4-17
Modulation 4-19
Error Control/Data Compression 4-19
Data Rates 4-21
RS-232 Signal Operations 4-23
Flow Control 4-24
S-Registers 4-29
Inquiry and Help 4-30
Testing 4-30
International Calls (&Gn, &Pn) 4-30
Miscellaneous Commands 4-31
Chapter 5Fax Operations and Call Detection
Fax Operations 5-1
Notes to Programmers 5-3
Call Detection 5-4
Chapter 6Queries and Help Screens
User Inquiries (In) 6-1
S-Register Query (Sr?) 6-7
Phone Number Query (&Zn?) 6-7
vi Table of Contents
COURIER HIGH SPEED MODEMS
Last-Dialed Number Inquiry (DL?) 6-8
Stored Command String Query (&ZC?) 6-8
Help Screens 6-8
Stop/Restart Display 6-8
Cancel Display 6-8
Basic Command Set ($) 6-8
Extended Command Set (&$) 6-9
Dialing (D$) 6-10
S-Register Functions (S$) 6-10
Percent Commands (%$) 6-11
PART II. REFERENCE
Appendix ALink Negotiation (Handshaking)
and Error Control
V.34 Handshaking A-1
V.Fast Class (V.FC) Handshaking A-2
U.S. Robotics V.32 terbo to U.S. Robotics V.32 terbo A-2
Other V. Protocol Operations A-3
Dual Standard Handshaking A-4
Error Control and Throughput A-4
V.42 Handshaking A-5
MNP Handshaking A-5
Data Compression A-5
Flow Control A-6
Throughput Guidelines A-7
Typical Throughput A-8
Appendix BSummaries and Tables
The RS-232 Interface B-2
Front Panel Indicators B-5
DIP Switch Summary B-7
Default Settings B-9
Factory Templates
&F1 Hardware Flow Control (Default) B-10
&F2 Software Flow Control B-11
&F3 HST Cellular B-12
&F0 No Flow Control B-13
NVRAM Options B-14
S-Register Summary B-15
ASCII Chart B-28
Table of Contents vii
COURIER HIGH SPEED MODEMS
Appendix CAlphabetical Command Summary
Command Set Usage C-1
Basic Command Set C-2
Ampersand (&) Command Set C-9
Percent (%) Command Sets C-18
Appendix DDial Security/Remote Access
Dial Security D-1
Remote Access D-10
Appendix ETroubleshooting
Appendix FSynchronous and Leased Line Operations
Synchronous F-1
V.25 bis F-4
Online synchronous F-9
Dedicated Line and Leased Line Operations F-15
Appendix GAdditional Operations
Cellular Operations G-2
Voice/Data (External Modems Only) G-4
Hewlett Packard 3000 Installations G-8
MI/MIC Operations (External Modems Only) G-9
Appendix HModem Testing
Testing with &T H-1
Ending a Test&T0, S18 H-1
Analog Loopback&T1, &T8 H-2
&T2 H-4
Digital Loopback&T3 H-4
&T4, &T5 H-5
Remote Digital Loopback&T6, &T7 H-5
Testing with Register S16 H-8
Analog LoopbackS16=1D H-9
Dial TestS16=2 H-9
Test PatternS16=4 H-10
Remote Digital LoopbackS16=8 H-10
Appendix ISoftware Upgrades
Appendix JGlossary
Appendix KTechnical Specifications
Index
viii Table of Contents
LIMITED WARRANTY
U.S. Robotics, Inc., warrants to the original consumer or other
end user purchaser that this product is free from defects in
materials or workmanship for a period of two years from the
date of purchase. During the warranty period, and upon proof
of purchase, the product will be repaired or replaced (with the
same or similar model) at our option, without charge for either
parts or labor. This warranty shall not apply if the product is
modified, tampered with, misused, or subjected to abnormal
working conditions.
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, AND U.S.
ROBOTICS SHALL IN NO EVENT BE LIABLE TO
PURCHASER FOR INDIRECT OR CONSEQUENTIAL
DAMAGES OF ANY KIND OR CHARACTER.
COURIER HIGH SPEED MODEMS
Some states do not allow the exclusion or limitation of
incidental or consequential damages or allow limitations on
how long an implied warranty lasts, so the above limitations or
exclusion may not apply to you. This warranty gives you
specific legal rights. You may also have other rights which vary
from state to state.
Should you encounter problems in operating this device, follow
the instructions in Appendix E in Part II of this manual. The
appendix contains solutions to operating problems as well as
procedures to follow if there is an apparent modem
malfunction.
Warranty Information ix
COURIER HIGH SPEED MODEMS
FCC REGISTRATION
FCC68: CJEUSA-73130-FA-E
RINGER EQUIVALENCE: 0.4B
FCC15:
CJE-0263 (External modem)
CJE-158-243 (Internal modem)
CJE-0151-243 (Daughterboard)
IC (INDUSTRY CANADA)
This digital apparatus does not exceed the Class B limits for
radio noise emissions from digital apparatus set out in the radio
interference regulations of Industry Canada (formerly Canadian
Department of Communications).
Le present appareil numerique n'emet pas de bruits radioelectriques depassant les limites applicables aux appareils
numeriques de la classe B prescrites dans le Reglement sur le
brouillage radioelectrique edicte par le ministere des
Communications du Canada.
CONNECTING TO THE TELEPHONE COMPANY
It is not necessary to notify the telephone company before
installing the modem. However, the telephone company may
request the telephone number(s) to which the Courier is
connected and the FCC information printed above.
If the modem is malfunctioning, it may affect the telephone
lines. In this case, disconnect the modem until the source of the
difficulty is traced. Do not use the modem on party or coin
telephone lines.
RADIO AND TELEVISION INTERFERENCE
This equipment generates and uses radio frequency energy,
and, if not installed and used properly in strict accordance with
the manufacturer's instructions, may cause interference to radio
and television reception. Courier high speed modems have
been tested and found to comply with the limits for a Class B
computing device in accordance with the specifications in Part
x Warranty Information
COURIER HIGH SPEED MODEMS
15 of FCC rules, which are designed to provide reasonable
protection against such interference in a residential installation.
However, there is no guarantee that interference will not occur
in a particular installation. If this device does cause interference
to radio or television reception, which you can determine by
monitoring reception when the modem is on and off, try to
correct the problem with one or more of the following
measures.
• Reorient the receiving antenna.
• Relocate the computer with respect to the receiver.
• Relocate the computer and/or the receiver so that they
are on separate branch circuits.
If necessary, consult your dealer or an experienced radio/
television technician for additional suggestions. You may find
the following booklet, prepared by the Federal Communications
Commission, helpful:
How to Identify and Resolve Radio-TV Interference
Problems
Stock No. 004-000-0345-4
U.S. Government Printing Office
Washington, DC 20402
In accordance with Part 15 of the FCC rules, any modification to
or tampering with this device that causes harmful interference
to others may be reason for prohibiting future operation.
FOR CANADIAN MODEM USERS
The Industry Canada (formerly DOC) label identifies certified
equipment. This certification means that the equipment meets
certain telecommunications network protective, operational,
and safety requirements. The department does not guarantee
the equipment will operate to a user's satisfaction.
Before installing this equipment, make sure you are permitted
to connect it to the facilities of the local telecommunications
company. You must also install the equipment using an
acceptable method of connection. In some cases, you may also
extend the company's inside wiring for single line individual
service by means of a certified connector assembly (telephone
extension cord). You should be aware, however, that
Regulatory Information xi
COURIER HIGH SPEED MODEMS
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 a user to this
equipment, or equipment malfunctions, may give the
telecommunications company cause to request the user to
disconnect the equipment.
For your own protection, make sure 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.
WARNING: Do not attempt to make such connections
yourself; contact the appropriate electric inspection authority or
electrician.
Courier High Speed Modems Load Number: 5
The Load Number (LN) assigned to each terminal device
denotes the percentage of the total load to be connected to the
telephone loop used by the device, without overloading. The
termination on a loop may consist of any combination of
devices, subject only to the requirement that the total of the
Load Numbers of all the devices not exceed 100.
xii Regulatory Information
CHAPTER 1. FEATURES AND COMPATIBILITY
INTRODUCTION
Congratulations! The Courier modem you've purchased represents powerful, advanced electronic design that offers exceptional reliability, compatibility and flexibility at all standard
rates up to 28,800 or 28.8K bits per second (bps). The
transmission rate between the computer and modem,
depending on your equipment and software support, can be as
high as 115.2K bps.
Features
The following features and capabilities assure you of superior
reliability and performance.
Connections up to 28.8K bps
COURIER HIGH SPEED MODEMS
With the V.34 standard and the V.Fast Class modulation
scheme, two modems can connect at rates up to 28.8K bps,
twice as fast as the rates of standard ITU-T (formerly CCITT)
V.32 bis modems, which are limited to calls of 14.4K bps or less.
Software Upgrades
Courier high speed modems are now software upgradable,
allowing you quick, easy access to the latest advances in data
communication technology. See Appendix I.
Quick Connect
In V.32 terbo mode, Courier high speed modems can handshake
and start transmitting much faster than typical training times
that range between 9 and 18 seconds for other modems.
Features and Compatibility 1-1
COURIER HIGH SPEED MODEMS
Universal Connect
Courier high speed modems automatically detect and connect
at the fastest available speed.
Adaptive Speed Leveling (ASL)
Like most high speed modems, Courier modems fall back to the
next lower speed—for example, 19.2K, then 16.8K in V.terbo
mode—if poor line conditions warrant. In addition, Courier
V.32 bis, and V.32 terbo modems detect improved line conditions
and shift upward again to the next higher speed. both transmit
and receive channels adapt independently, each detecting and
adjusting to line conditions. ASL keeps the modems online,
always operating at the highest possible speed, and constantly
ensuring data integrity.
Fax Capability
You can use your modem with Class 1 or Class 2.0 facsimile
software to exchange faxes with millions of Group III fax
machines worldwide. See Chapter 5.
Error ControlV.42/MNP
Data integrity is ensured when the modems connect with
remote modems that use the V.42 (LAPM), HST, or MNP error
control protocols. Error control is available on calls at 1200 bps
and above.
Data CompressionV.42 bis/MNP5
Data compression enables potential throughput of up to 115.2K
bps on 28.8K bps connections. Couriers connecting under V.42
or HST error control use V.42 bis compression. Couriers
connecting under MNP error control use MNP Level 5
compression. Typical throughput of text and other types of files
using V.42 bis is provided in Appendix A.
1-2 Features and Compatibility
COURIER HIGH SPEED MODEMS
Flow Control/Variable Serial Port Rates
Flow control, required under error control, also allows the local
serial port (DTE) rate to be set higher than the link (connection)
rate, enabling greater efficiency and throughput. If your
equipment and software support high rates, data can be sent
from the computer to the modem at 115.2K, 57.6K, 38.4K or
19.2K bps, regardless of the link rate.
Voice/Data Switch
A switch on the modem's front panel allows you to change from
voice to data and back again, without issuing a command. See
Appendix G.
Stored Command String
If you don't ordinarily use voice and data in the same call, you
can assign the voice/data switch a different function that
normally requires a command, such as resetting the modem or
executing a stored command string. See Voice/Data in Appendix
G for instructions on use of the voice/data switch.
Asynchronous/Synchronous Capability
Courier high speed modems operate synchronously as well as
asynchronously. A personal computer equipped with a
synchronous interface adapter can call computers that use
standard synchronous protocols. See Appendix F for more
information.
Synchronous Operations with V.25 bis
Used with computers that have a synchronous card and port,
Courier high speed modems combine the power of older
modems and automatic calling units in the mainframe
environment. They make synchronous connections by utilizing
V.25 bis, character-oriented (similar to BISYNC) and HDLC
protocols. See Appendix F for more information.
Dial Security
With Dial Security, you will be able to prevent unauthorized
access to a system with the use of Autopass, Prompting, and
Dialback. See Appendix D for more information.
Features and Compatibility 1-3
COURIER HIGH SPEED MODEMS
Programmable Nonvolatile Memory
You can tailor your own default settings and store them in nonvolatile random access memory (NVRAM). Each time the
Courier is powered on or reset, it operates at the settings you've
specified. See Chapter 4, Appendix B, and Appendix C.
Link Rate Negotiation
The Courier automatically lowers its link rate to match a lower
rate of a remote modem, in both Originate and Answer Modes,
allowing connections with a wide range of installed modems.
Link Diagnostics
After each call, you can display a Link Diagnostics screen containing information about the last call, including the number of
data characters transferred, line statistics, the call's rate and the
reason the call was disconnected. See Chapter 6.
Modem Diagnostics
ITU-T V.54 loopback testing with the &T command options, and
earlier Courier Register S16 test options are available. The
modem performs three loopback tests: analog, digital, and
remote digital. See Appendix H for information.
Inactivity Timer
You can set the modem to automatically hang up after a specified number of minutes if there is no activity on the phone line.
See Register S19 in Appendix B.
Call Duration Reporting
The modem records the duration of your calls in hours,
minutes, and seconds. This feature enables you to display and
print an audit of your calling activities. You can optionally use
the modem clock as a real-time clock. See the I3 and I6 screens
in Chapter 6 and the K command in Chapter 4 and Appendix C.
Call Progress Detection
An optional set of result codes (screen messages) lets you know
when a line is busy, a person rather than a modem has
answered the phone, there is no dial tone, or the distant phone
is ringing.
1-4 Features and Compatibility
COURIER HIGH SPEED MODEMS
Modem Settings Displays
On command, the modem displays its current settings, a handy
way to check your transmission rate, S-Registers and other
operational controls. The modem also displays the defaults
stored in nonvolatile memory as well as its default
configuration templates. See Chapter 6.
HELP Screens
The modem displays screens that summarize the command sets,
Dial command options, and S-Register functions. See Chapter
6.
Bottom Panel Reference
Command summaries and other information are printed on the
bottom of the modem case. A Dual In-Line Package (DIP)
switch guide makes it easy to tailor the switch settings to your
terminal or software requirements.
Dialing the Last-Dialed Number
The modem has a buffer that stores each dialed number until it
is cleared by another Dial command. A few keystrokes cause
the modem to redial the number in the buffer without your
having to enter the number again. See the DL command in
Appendix C.
Automated Redialing
You can put the modem into Repeat Mode to continuously
redial if a previous dial attempt fails to connect. This is especially useful in dialing services whose lines are often busy. See
Chapter 4.
Quote Mode
Set the modem to Quote Mode if you want it to dial an alphabetic acronym instead of a numeric number. See Chapter 4.
Features and Compatibility 1-5
COURIER HIGH SPEED MODEMS
COMPATIBILITY
The Courier adheres to the following modulation schemes and
standards, ensuring compatibility with a wide base of installed
modems. Unless otherwise indicated, Dual Standard V.34
modems conform to the listed standards.
NOTE: The International Telecommunication Union (ITU-T)
was formerly the International Telegraph and Telephone
Consultative Committee (CCITT).
ITU-T V.34 28.8K/26.4K/24K/21.6K/19.2K/16.8K/14.4K/12K/
9600/7200/4800/2400 bps
V.FC 28.8K/26.4K/24K/21.6K/19.2K/16.8K/14.4K bps
V.32 terbo 21.6K/19.2K/16.8K/14.4K/12K/9600/
7200/4800 bps
HST 16.8K/14.4K/12K/9600/7200/4800 bps (Dual
Standard modems in HST mode with ASL up
to 21.6K bps)
HST Cellular Cellular connections at 12K/9600/7200/
4800/2400/1200/300 bps (Dual Standard
modems in HST mode)
ITU-T V.32 bis 14.4K/12K/9600/7200/4800 bps
ITU-T V.32 9600/4800 bps
ITU-T V.22 bis 2400 bps
Bell 212A 1200 bps (also V.22)
ITU-T V.23 1200 bps with 75 bps back channel (some U.K.
and European phone systems)
ITU-T V.25 Answer sequence for calls originating outside
the U.S. and Canada
ITU-T V.25 bis For synchronous communications using
HDLC and character-oriented protocols
Bell 103 300 bps (ITU-T V.21 optional)
ITU-T V.42 LAPM error control, 1200 bps and higher
ITU-T V.42 bis Data compression, 1200 bps and higher
1-6 Features and Compatibility
MNP Levels 2, 3 and 4 error control, level 5 data
ITU-T V.54 Analog, digital and remote digital loopback
Fax Standards
The Courier modem provides Group III-compatibility when
combined with Class 1 or Class 2.0 fax software. In addition,
the modem adheres to the following standards.
TIA/EIA-578 Service Class 1 Asynchronous Facsimile
TIA/EIA-592 Service Class 2.0 Asynchronous Facsimile
ITU-T V.17 14.4K/12K bps
ITU-T V.29 9600/7200 bps
ITU-T V.27 ter 4800/2400 bps
ITU-T V.21 300 bps
COURIER HIGH SPEED MODEMS
compression, 1200 bps and higher
testing
DCE Control Standard
DCE Control Standard
Other Compatibility Features
Other compatibility features include the following standards
and certification:
• Can be used with any computer or terminal that is compatible with the RS-232 standard interface.
• Can be used with any computer or terminal that uses
ASCII, the standard character code supported by most
equipment manufacturers.
• Is fully FCC- and IC-certified for the uses described in
this manual.
Features and Compatibility 1-7
COURIER HIGH SPEED MODEMS
CHAPTER 2. MODEM SET UP
HS AA CD OH RD SD TR MR RS CS SYN ARQ/
Figure 2.1—Courier V.34 Modem
Reminder
To prevent overheating, do not cover the vents on the top of the
modem case.
SWITCHES ON THE MODEM
Voice/Data
This push-button switch is used primarily to switch between
voice and data communications during a call. Detailed
instructions are in the Voice/Data Calls section in Appendix G.
FAX
VOICE/DATA
V.34 Fax with
V.FC and V.32 bis
External Modem Set Up 2-1
COURIER HIGH SPEED MODEMS
Volume Control
This is a slide switch underneath the right side panel of the
modem, near the front corner. Sliding it toward the front of the
modem increases the modem speaker’s volume; sliding it
toward the rear of the modem decreases the volume.
FRONT PANEL INDICATORS ON THE MODEM
The modem has twelve status lights, or LEDs. See Appendix B
for descriptions of their operations.
PACKAGE COMPONENTS
Your Courier modem package contains the following items:
• The modem you purchased: Courier V.34
• An RJ11C phone cord
• A power adapter
• Fax software and manual
• A Quick-Reference card
WHAT YOU NEED
The Courier modem has minimal operational requirements. Be
sure to read the information in the front of this manual about
radio and television interference and connecting to the phone
company. In addition, you should be aware of the following
requirements.
An RS-232 Cable
You need an RS-232 cable to connect the modem to your computer or terminal. Use a shielded cable to ensure minimal inter-
ference with radio and television reception.
NOTES:
• Refer to Appendix B for a listing of RS-232 pin
assignments required to operate the modem. Be sure to
check the appendix if you're not sure what type of cable
you need, or if you're building your own.
2-2 External Modem Set Up
• If your machine has other than a 25- or 9-pin port, check
your computer documentation or consult your dealer to
find out what type of RS-232 connector is required.
WARNING: If you're planning to use the high speed
computer-to-modem rates of 115.K, 57.6K or 38.4K bps, follow
the instructions concerning the RS-232 cable in Appendix B.
The guidelines there will help you to avoid signal degradation
at very high speeds.
Communications Software. . .
. . .if the modem is attached to a computer instead of a terminal.
The software uses the modem's AT command set to control
many communications functions, including configuring the
modem, dialing, and answering calls, and also enables the
transfer of files and other operations.
Some users prefer their communications software to take
control of the modem, and are more comfortable with a
program that makes the modem almost transparent. Others
prefer a program that allows them to use the modem's AT
command set sometimes, and their software at other times,
depending on the task at hand.
COURIER HIGH SPEED MODEMS
Review Chapter 4 so that you have a basic understanding of the
modem's requirements and operation.
Telephone Adapter. . .
. . .if you have an older telephone installation that does not
have the appropriate modular wall jack and plug.
Adapters and RJ11C connectors are available from your
telephone company or computer dealer.
YOU SHOULD. . .
Refer to Appendix F. . .
. . .if your phone line is user-installed or if it is leased from the
telephone company.
External Modem Set Up 2-3
COURIER HIGH SPEED MODEMS
Refer to Appendix G. . .
. . . if your modem is installed in a Hewlett Packard system that
uses the Ack/Enq communications protocol.
INSTALLING THE MODEM
1. Turn off the computer or terminal and its peripheral
devices.
2. Examine the label on the bottom of the modem. In addition
to the summaries and other information, the label contains
icons to aid in modem installation.
4. Make sure that the modem’s power switch is OFF; press it
towards the zero in the 0/1 icon on the bottom label.
5. Plug the power supply adapter's small connector into the
power jack at the back of the modem. Plug the adapter into
a standard 115-volt AC wall socket.
6. Disconnect your present phone cable from the wall jack.
Plug one end of the supplied phone cable into the modem's
phone jack (refer to the bottom label). Plug the other end
into the wall jack.
If you want to keep your telephone connected for conventional calls, plug its cord into the modem’s telephone jack
(refer to the bottom label).
7. Check the positions of the bank of Dual In-Line Package
(DIP) Switches located in the well at the bottom of the
modem. These switches are set at the factory to the
positions most users require.
1 2 3 4 5 6 7 8 9 10
OFF
ON
Figure 2.2—DIP Switch Factory Settings
Check your software documentation for its requirements,
particularly for DIP switches 1, 4, 5 and 6. You'll also find
descriptions of switch functions and options in Appendix B.
2-4 External Modem Set Up
COURIER HIGH SPEED MODEMS
NOTE: If you have built your own RS-232 cable and it does
not support the Data Terminal Ready (DTR) signal, set DIP
switch 1 ON, for DTR override. The override causes the
modem to operate as if the DTR signal were always ON,
and enables the modem to accept commands. Most
purchased communications software, however, requires
“normal” DTR.
8. The final step is to connect the modem to the computer's or
terminal's serial port with the RS-232 cable. Attach the
appropriate connectors to the modem and to the serial port.
To wall outlet
Figure 2.3—Cabled Courier Modem
POWER
ON/OFF PHONE JACKS SERIAL PORT INTERFACE
To wall jack
To phone
External Modem Set Up 2-5
To computer
COURIER HIGH SPEED MODEMS
TESTING THE INSTALLATION
Use the following procedures to verify that your modem is
working properly.
1. Turn on your computer or terminal. Then turn the
Courier's power switch ON. The following front panel
indicators, or LEDs, will light up on the modem.
CD Carrier Detect, if you have set DIP switch 6 ON,
enabling the CD override
TR Data Terminal Ready, if you have set DIP switch 1
ON, enabling the DTR override
MR Modem Ready/Power ON
CS Clear to Send
2. If you're using a personal computer, load your software to
start the program. Set your terminal or software to 19.2K
bps or 9600 bps. In addition, set a word length of either 7
bits plus 1 parity bit, or 8 bits with no parity—it doesn't
matter which at this time—and 1 Stop bit. Set the software
to use the correct serial port (port through which the
modem connects to the computer).
3. Perform the function that lets you send AT commands to
the modem, that is, puts the computer in Terminal mode.
Some communications programs do this automatically upon
loading. Others require you to display a communications or
terminal screen, type a Function key, or perform some other
operation.
Review your communications software documentation for
instructions.
4. Send the following attention command. Type either upper
or lower case letters, not a combination, and then press the
Enter (Carriage Return) key, shown in the example below
between angle brackets. (Don't type the angle brackets.)
AT <Enter>
If everything is correct, the modem responds as follows:
OK
Go on to step 5.
2-6 External Modem Set Up
COURIER HIGH SPEED MODEMS
Troubleshooting
If your entered command is not displayed, your local echo is
OFF. To turn the local echo ON, send the modem the
following command:
ATE1 <Enter>
If double characters appear on the screen, both your modem and
software are set to local echo ON. Either set your software
to local echo OFF, or turn the modem's echo OFF with the
following command:
ATE0 <Enter>
If no OK appears on your screen after you completed Step 4,
review the following checkpoints:
a. Make sure you type all upper or lower case letters and
press <Enter>.
b. Check to see that you set your communications
software to the correct serial port. The correct serial
port is the port through which the modem is connected
to the computer.
c. Make sure your software has put the computer in
Terminal mode, so that you can send the modem
commands. Then review Step 4, on the previous page.
d. Be sure that DIP switches 1 and 6 are set ON or OFF
according to your terminal or software requirements.
The table in Appendix B explains each function, and
you may also need to review your terminal or
communications software documentation.
e. If you set DIP switch 8 OFF, for Dumb mode, reset the
modem to Smart mode: set DIP switch 8 to ON.
f. The modem is shipped with DIP switch 3 ON, enabling
the result codes. If DIP switch 3 is OFF, set it to the ON
position. Then initiate the new switch setting with the
following reset command:
ATZ <Enter>
External Modem Set Up 2-7
COURIER HIGH SPEED MODEMS
5. As a final check, make sure the modem gets a dial tone.
Type the following Dial command:
ATD <Enter>
On receipt of the command, the modem goes off hook and
waits for a dial tone. The OH indicator lights up, and you'll
hear the dial tone from the modem's speaker. To cancel the
operation, press any key.
Troubleshooting
If you don't hear the dial tone, first increase the volume by
sliding the volume control switch towards the front of the
modem. If that doesn't work, check to see that the phone
cable from the wall jack is connected to the correct jack on
the modem (See Figure 2.3). If necessary, reconnect the
phone cable correctly. Then try the Dial command again,
ATD <Enter>.
2-8 External Modem Set Up
CHAPTER 3. INTERNAL MODEM SET UP
PACKAGE COMPONENTS
Your Courier modem package contains the following items:
• The modem you purchased: Courier V.34
• An RJ11C phone cord
• A power adapter
• Fax software and manual
• A Quick-Reference card
WHAT YOU NEED
The Courier modem has minimal operational requirements. Be
sure to read the information in the front of this manual about
radio and television interference and connecting to the phone
company. In addition, you should be aware of the following
requirements.
COURIER HIGH SPEED MODEMS
Communications Software. . .
. . .if the modem is attached to a computer instead of a terminal.
The software uses the modem's AT command set to control
many communications functions, including configuring the
modem, dialing, and answering calls, and also enables the
transfer of files and other operations.
Some users prefer their communications software to take
control of the modem, and are more comfortable with a
program that makes the modem almost transparent. Others
prefer a program that allows them to use the modem's AT
command set sometimes, and their software at other times,
depending on the task at hand.
Review Chapter 4 so that you have a basic understanding of the
modem's requirements and operation.
Internal Modem Set Up 3-1
COURIER HIGH SPEED MODEMS
A Telephone Adapter. . .
. . .if you have an older telephone installation that does not
have the appropriate modular wall jack and plug.
Adapters and RJ11C connectors are available from your
telephone company or computer dealer.
YOU SHOULD. . .
Refer to Appendix F. . .
. . .if your phone line is user-installed or if it is leased from the
telephone company.
Refer to Appendix G. . .
. . . if your modem is installed in a Hewlett Packard system that
uses the Ack/Enq communications protocol.
BEFORE INSTALLING THE MODEM
A typical new modem user has a PC with a printer connected to
the PC's parallel printer port, and a mouse cable attached to the
PC's first serial port. For this user, the modem is the only device
that requires a second serial port. If this is your situation, you
can skip this entire section except for DIP Switches, just before
Installing the Modem. Just remember that after you load your
communications software, you'll have to set the software to use
the COM2 serial port.
IBM PC-compatible serial ports are referred to as COM ports.
Two COM ports are standard: COM1 and COM2. DOS recognizes up to four COM ports, although more can be programmed. The Courier is set at the factory to use COM2. This
is because many computers are shipped with COM1 equipped
with an external serial connector for attaching a device such as a
serial printer or serial mouse. If you have one or more of these
devices, you're probably already familiar with COM ports on a
PC.
3-2 Internal Modem Set Up
If you're only using COM1 for a device, you can skip this section except for DIP Switches, just before Installing the Modem. If
you've already installed devices at both COM1 and COM2, you
will have to select either COM3 or COM4. Carefully review the
following section for complete instructions.
Select a Serial Port
WARNING: If you are going to use COM1, COM3, or COM4,
you must change some switches on the modem board, called
jumpers. First, you need to select the correct Interrupt Request
(IRQ) to use at that serial port. Peripheral devices use IRQs to
instruct the computer to stop the processor's current operation;
this allows the devices to perform their operations.
Using COM1, 2, 3 or 4 depends on your equipment's configuration, as described below. Remember which serial port you
assign to the modem, because you must specify it to your
communications software later. The table in the next section
includes hexadecimal addresses, required by some software.
COURIER HIGH SPEED MODEMS
COM1: You may use this port if the computer does not have an
installed serial connector at COM1. (This situation is unlikely.)
You will have to modify some switches on the modem, so be
sure to read this entire section of the chapter. However, you
may prefer to leave the modem set to COM2 and proceed to
DIP Switches, just before the installation instructions.
COM2: If your computer is equipped with one serial connector
at COM1, and if you are not already using COM2 for another
device, use this port. (This is the most common configuration.)
Since the modem is already set to operate at COM2, skip the
rest of this section and proceed to DIP Switches, just before the
installation instructions.
COM3, COM4: If you have two serial devices that already use
COM1 and COM2, you can set the modem for either COM3 or
COM4. Review your communications software documentation
to be sure your program supports these additional serial ports.
(Most programs do.) If your software doesn't, you will have to
remove one of the other devices.
Internal Modem Set Up 3-3
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