FLASH x2
User’s Guide
This manual covers installation and operating instructions for the
following U.S. Robotics modems:
· Sportster Flash with x2
IMPORTANT MESSAGE: This product is capable of download speeds
up to 56Kbps; however, the download speeds you experience may be
lower due to varying line conditions. We are continuing to test and
improve our modem technology to achieve faster speeds. Visit our Web
site at http://www.3Com.com for future updates and enhancements.
The material contained in this document is for information purposes only
and is subject to change without notice. 3Com makes no representations
or warranties with respect to the contents hereof and specifically
disclaims any implied warranties of merchantability or fitness for any
particular purpose.
No part of this document may be reproduced, transmitted, transcribed, or
stored in a retrieval system in any form or by any means, mechanical,
magnetic, electronic, optical, chemical or otherwise, without the written
permission of 3Com.
3Com and the 3Com logo, U.S. Robotics and the U.S. Robotics logo are
registered trademarks of 3Com Corp. 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.
3Com assumes no responsibility for errors or omissions in this manual.
Nor does 3Com make any commitment to update the information
contained herein.
1997 3Com Corporation
Table of Contents
3COM/U.S. ROBOTICS : THE INTELLIGENT CHOICE IN
INFORMATION ACCESS™.................................................................... 1
WELCOME TO X2 INFORMATION ACCESS......................................3
FEATURES.............................................................................................5
EXTERNAL MODEM INSTALLATION.................................................... 7
COMMUNICATIONS SOFTWARE........................................................11
SPORTSTER FLASH AND X2..............................................................15
ENHANCED X2 FEATURES .....................................................................15
HOW TO TELL IF X2 IS ENABLED IN YOUR MODEM ....................................16
HOW X2 WORKS.................................................................................. 16
The Shift from Analogue to Digital Circuits......................................17
Client and Server Modems .............................................................17
Making x2 Work..............................................................................18
CONTROLLING X2.................................................................................18
CONTROLLING LINK SPEEDS WITH &N AND &U....................................... 19
Controlling Link Speeds..................................................................19
Limiting the Highest Possible Connect Speed.................................19
Limiting the Lowest Possible Connect Speed ..................................20
Limiting a Range of Possible Connect Speeds................................20
&N and &U Command Values.........................................................21
TROUBLESHOOTING X2 CLIENT CONNECTIONS ........................................22
NEW X2 RESULT CODES.......................................................................23
NEW X2 RESULT CODES (CONTINUED)...................................................24
TROUBLESHOOTING..........................................................................25
U.S. ROBOTICS ON-LINE RESOURCES.............................................29
ARE YOU STILL HAVING PROBLEMS?...................................................... 30
IF YOU MUST RETURN THE MODEM TO US..............................................31
GLOSSARY..........................................................................................33
QUICK REFERENCE ............................................................................43
SPORTSTER FLASH SPECIFICATIONS.............................................65
CE MARK............................................................................................66
Electromagnetic Compatibility.........................................................66
SAFETY...............................................................................................66
LIMITED WARRANTY..........................................................................67
3Com/U.S. Robotics :
C
The Intelligent Choice in
Information Access™
ongratulations! You have just purchased the Sportster Flash
modem. Since 1976, 3Com/U.S. Robotics has grown to become
a key manufacturer and developer of information access
technology. 3Com/U.S. Robotics advanced technology allows you to
use your faxmodem to open up a new world of information access.
Now you can take advantage of the highest transfer rates available
today with our new x2™ technology!
As an innovator in the data communications field, 3Com/U.S. Robotics
has a history of bringing the latest technology to market at an affordable
price.
3Com/U.S. Robotics owns the core technology, known as the data
pump, that works in its access products. This allows 3Com/U.S.
Robotics to bring new technologies and features to market faster and at
a lower cost, while passing the savings on to you.
Be sure to read the following section to learn more about the latest
3Com/U.S. Robotics breakthrough, x2 technology. Your new 56K
Professional Message Modem takes advantage of this technology to
make connecting over analog lines faster than ever before.
For more information on 3Com/U.S. Robotics, visit the 3Com/U.S.
Robotics World Wide Web Home Page at: http://www.3com.com.
Sportster Flash x2 - User’s Guide 1
2 Sportster Flash x2 - User’s Guide
Welcome to x2 Information
Access
The latest breakthrough in online communications
Until now, 33.6Kbps was thought to be the practical limit for speed over
standard phone lines. Now, x2 shatters that barrier, to bring you
download speeds of up to 56Kbps. However, the download speeds you
experience may be lower due to varying line conditions. This modem is
software upgradeable, allowing easy upgrades to new features and
enhancements as they become available.
An integrated end-to-end solution from the leader
3Com is well positioned to bring you x2 technology. Our U.S. Robotics
modems are the world's number one seller, and our Total ControlTM and
CourierTM product lines are favored by many Internet service providers.
This widespread acceptance allows 3Com to offer x2 technology to
virtually anyone.
Taking advantage of the modern telephone network
x2 technology uses the increasingly digital telephone network to bring
you faster downloads, by eliminating the analog-to-digital conversion in
the downstream path.
x2 takes advantage of the typical network configuration found when an
analog subscriber connects to a digitally connected server. Since x2
bypasses the analog-to-digital conversion in the downstream path, it
can use nearly all of the available 64K network bandwidth. (Upstream
data, typically less speed sensitive, travels at the standard V.34 rate.)
Sportster Flash x2 - User’s Guide 3
The result is a completely new kind of transmission technique. Based
on “encoding” rather than “modulation,” it can give you download
speeds that you never thought possible. What’s more, with standard
V.42bis compression, x2 can download at speeds up to a blistering
115.2Kbps.
The new standard for online speed
3Com has already submitted x2 to the ITU-T standards committee for
acceptance as the next online standard.
For more information on U.S. Robotics x2 technology, see our World
Wide Web page at http://.3com.com.
4 Sportster Flash x2 - User’s Guide
Features
Data Communications
Your modem offers a range of internationally accepted standard
modulation methods and protocols. It utilises hardware-based
V.42/MNP 2-4 error control and V.42 bis/ MNP 5 data compression.
Your modem will transmit at speeds up to 33,600 bps with throughput
to 115,200 bps. Also, it is universally compatible with the following
standards: V.34, V.32 bis, V.32, V.22 bis, Bell 212A/V.22, V.23, V.21
modems.
Fax Capability
You can use your modem with Class 1 or Class 2.0 fax software to
exchange faxes with Group 3 fax machines world-wide at speeds up to
14.400 bps.
Flash ROM Upgradable
Sportster Flash supports software download through flash memory.
You can download upgrades to obtain quickly and easily the latest
features.
Speakerphone*
You can use your new Sportster as a full-duplex speakerphone without
the echoing sound of some speakerphones. The full-duplex feature
allows you to speak at the same time as someone on the other end
without losing any sound quality. This affords you all the convenience
of a speakerphone without the extra hardware and leads for the home
or office.
The external modems have built-in microphones.
Sportster Flash x2 - User’s Guide 5
Personal Voice Mail*
With Personal Voice Mail, your modem is a full-featured messaging
system offering business-quality voice mail features in the convenience
of your home or office.
Using this feature, you can send voice greetings and record voice
messages like a standard answering machine with several “voice
mailboxes” on one system. You can even access your voice messages
remotely. Your modem will auto-detect incoming fax, voice, and data
calls and provides fax-on-demand services you can tailor to your needs.
* A headset, external powered speakers or soundcard is required
to utilise all voice features including hands-free speakerphone.
6 Sportster Flash x2 - User’s Guide
External Modem Installation
Getting Started
This chapter will walk you through the installation of your external
modem with your personal computer.
Before getting started, make sure that you have the following
items:
· Modem
· Serial Cable
· Data/Fax/Voice software and User Guide
· RJ11 - telephone lead & Tail lead adaptor
· Power Adaptor
· PSTN (Standard) Telephone Socket
· This Guide
There are two parts to installation: software and hardware. Software
allows you to communicate with your modem so that you can send and
receive data and faxes, as well as activate voice features. Software
installation is discussed in your communications software user guide.
Hardware is the modem itself, which will be connected to your computer
by the serial cable.
Sportster Flash x2 - User’s Guide 7
Hardware Installation Steps
Power
on/off
To speaker
To phone
To power
source
To wall
To computer
Volume
Before you begin the modem installation, turn off your computer and
any attached devices, such as a printer. Follow these steps to install
your modem. Refer to the drawing below of the back panel.
1. Connect the serial cable to the modem and to the computer.
When looking for your serial port label on the back of your
computer, select COM, MODEM, RS-232, or SERIAL.
Do NOT select AUX, GAME, LPT, or PARALLEL.
Note which serial port you selected.
This information will be necessary when installing your
communications software.
2. Plug the power adaptor into the power socket and into a
standard wall outlet.
3. Plug one end of the phone lead into the telephone socket
(labelled with a wall plug icon on the bottom of the case) and the
other end into a phone wall socket.
4. If you wish to use your modem and phone through the same
phone wall socket, plug your phone's lead into the modem's
other socket (labelled with a phone icon on the bottom of the
case), using the supplied Tail lead adaptor.
5. An external powered speaker must be connected for speakerphone
use. For more information, see the next page and consult your
software manual.
socket
8 Sportster Flash x2 - User’s Guide
Speaker Attachment
An external powered speaker or headset can be connected to the 3.5
mm speaker socket located on the back of your Sportster. This
accessory is required when using the speakerphone and voice mail
facilities.
Microphone
The microphone that is built into your modem is located on the front
panel.
Installing your Software
1. Insert the software diskette included with your modem or
another modem software disk. If using other software, consult
its own manual for installation procedures.
2. From Program Manager, choose File. Then choose Run and
type a:\install and press <Enter>.
3. Once the software is installed, enter the software group and
click on the application icon.
You have successfully finished installing your modem and software.
Sportster Flash x2 - User’s Guide 9
10 Sportster Flash x2 - User’s Guide
Communications Software
Note: If you are using the communications software included with your
modem, you can disregard this chapter. However, if you are using your
own communications software, please refer to the software's manual
and this chapter.
Communications software allows you to change settings and issue
commands to your modem.
The software included with your modem is pre-configured for optimal
performance with the Sportster. Refer to the software manual for any
additional information. Be sure to install software after the modem is
installed.
Configuring Your Modem
Some programs allow you to select your modem type from a menu.
Select the appropriate U.S. Robotics Sportster High Speed modem. If
yours is not present, try a Courier Dual Standard, V.32 bis, V.FC, or V.
34.
Other programs require you to enter an initialisation string in the
software Modem Set-up screen. If this is the case, enter the following
string to initialise your modem with the optimal settings for your PC:
AT&F1<Enter>.
These settings include: hardware flow control, a fixed serial port rate,
and full result codes.
If you must use software flow control, enter the following string:
AT&F2<Enter>
Sportster Flash x2 - User’s Guide 11
Configuring Your Software
1. Turn on your computer and modem
2. Install your communications software (refer to the software's
documentation).
3. From DOS, change to your Windows directory and
type MSD.
Type C for COM Ports. Find the line UART Chip Used and
match it with the COM Port column to which you attached
your modem to determine the UART type (usually 8250,
16450, or 16550). Remember your UART type for step 5.
4. Start your communications software program.
5. Set the software's serial port (baud) rate based on your UART
type. Also, fix or lock the serial port rate (if referred to as
autobaud, select OFF).
UART Serial Rate
16550 115.2K or 57.6K bps
16450 38.4K bps
8250 19.2K bps
6. Specify the serial (COM) port used by the modem in your
communications software if working in DOS. Check the serial
port to which your modem is connected.
7. Specify your modem's flow control setting: RTS/CTS for
hardware flow control (highly recommended) or XON/XO FF for
software flow control. You should disable the flow control
method you are not using.
12 Sportster Flash x2 - User’s Guide
Testing Your Installation
1. To test your modem and software installation, perform the
software function that puts your computer in Terminal mode. In
Terminal mode, a cursor appears on your screen, allowing you
to send commands directly to the modem.
2. To determine if your computer and modem are communicating
properly, type the following command: AT E1 Q V1<Enter>
· If the COM port and IRQ settings are correct on your
modem and in your software, the modem responds: OK
· If the characters you type do not appear, no OK appears, or
double characters appear, see the Troubleshooting section
in this guide.
Sportster Flash x2 - User’s Guide 13
14 Sportster Flash x2 - User’s Guide
Sportster Flash and x2
Congratulations on your purchase of x2 56K technology! x2 is a
revolutionary new technology that allows your modem to use
normal analogue phone lines to enable download speeds up to
56kbps.
Information about x2
For more information about x2, visit the 3Com, U.S. Robotics
brand x2 Web Site at http://www.3Com.com.
Enhanced x2 Features
Your Sportster modem with x2 has new result codes and the following
new features. Refer to later sections for more information.
To do this Use this command
Detemine if x2 is enabled in your modem
Disable or enable x2
Limit the upper speed limit of an x2
connection
Limit the lower speed limit of an x2
connection
Note: New x2 features should be transparent to most users. If you are
an advanced user, see ”Controlling x2” and “Controlling Link Speeds
with &N and &U” for detailed information regarding these new features.
Sportster Flash x2 - User’s Guide 15
ATI7
ATS32.5=1 or 0
AT&N
AT&U
How to Tell if x2 is Enabled in Your
Modem
If you are not sure whether x2 is enabled in your Sportster modem, use
the ATI7 command to display product configuration information. If x2 is
enabled on your Sportster modem, the following information displays:
USRobotics Sportster Configuration Profile...
Product type (Country) External
Options V32bis, V.34+,x2
Fax Options Class 1/Class 2.0
Clock Freq 92.0Mhz
Eprom 256k
Ram 64k
FLASH date 6/30/97
FLASH rev 10.1.68
Serial Number xxxxxxxxxxxxxxxxx
OK
Note: Dates, serial numbers, and revision numbers may vary. The
most important line is the “Options” line, which lists support for x2.
How x2 Works
U.S. Robotics brand x2 technology enables analogue modems to
receive data at up to 56 kbps over the standard analogue, public
switched telephone network (PSTN). x2 overcomes the limitations
imposed on standard, analogue modems by exploiting the digital
connections that most Internet and online service providers have at
their end to connect to the PSTN.
16 Sportster Flash x2 - User’s Guide
The Shift from Analogue to Digital Circuits
When the first telephone networks were established, they were
completely analogue. Over time, telephone companies began replacing
portions of their analogue networks with digital circuits, which provided
a higher telephone signal quality at a more economical price.
Today, the PSTN is almost entirely digital. Typically, the only portion of
the telephone network that remains analogue is the line that connects
your home to the telephone company's local exchange. The rest of the
telephone network is digital.
Client and Server Modems
x2 will not require changes to your wiring and equipment that's already
in place. All that is required to use x2 is a software upgrade.
Client Modems
x2 client modems can receive data at speeds up to 56kbps* and send
data at V.34 speeds up to 33,600bps. The following products are
examples of U.S. Robotics brand Client Modems:
• Courier™ V.Everything™ with x2
• Sportster® with x2
• Analogue Modem Pools or NETServer with x2
Server Modems
The digital x2 modems that x2 client modems connect to are called x2
server modems. Server modems can send data to x2 client modems at
speeds up to 56kbps. A server must have a “digital” interface to the
PSTN. This digital interface can be in the form of a “trunk-side” T1,
Primary Rate Interface (PRI) , or Basic Rate Interface (BRI). The
following products are examples of server x2 modems:
• Courier I-modem with x2 (in Server Mode)
• Quad Modem 5.0/5.1 (in Server Mode)
*
Pending line conditions
Sportster Flash x2 - User’s Guide 17
• MP I-modem or NETServer I-modem with x2
Making x2 Work
To use x2, the x2 client modem must connect to an x2 server modem.
If clients attempt to connect to ISPs that do not use x2, the client
modem will negotiate the next available modulation. For example, an
x2 client modem calling into an ISP that only supports V.34, will
negotiate the highest V.34 connection rate. The maximum V.34
connection speed is 33.6kbps.
When an x2 client modem connects to an x2 server modem, the path
through the telephone network between the modems is subject to the
following conditions for an x2 connection to be made.
A Digital Connection At One End
ISPs or online services must have a digital connection to the PSTN.
Most major online services have digital connections to the PSTN.
Only One Digital-to-Analogue Conversion
There can be only one digital-to-analogue conversion in the telephone
network between the x2 server modem and the x2 client modem.
Controlling x2
Use the following S58 settings to control x2:
To do this Use this command
Disable x2
Enable x2 (default)
18 Sportster Flash x2 - User’s Guide
S32.5=1
S32.5=0
Controlling Link Speeds with &N
and &U
You can use the &N and &U commands to control link speeds.
Sportster modems without x2 can still use the &N and &U commands,
but can only control link speeds up to 33.6kbps.
Controlling Link Speeds
You can use the &N and &U commands to control the link speeds of
your Sportster with x2. Use the following table to determine how to use
&N and &U commands:
To limit the Use
Highest possible connect speed &N
Lowest possible connect speed &U
Range of possible connect speeds &N and &U
Note: The default values for &N and &U are 0. If you change these
values, you will limit the speeds at which you can connect. 3Com
recommends that you do not alter these values.
Limiting the Highest Possible Connect Speed
The &N command allows you to limit the highest possible connect
speed. If a remote modem attempts to connect to your Sportster with x2
at a speed higher than &N, your Courier with x2 will not allow it to
connect.
To limit the Use this command Where x is
Highest possible
connect speed
Note: See table 12.4 for a list of connect speed values.
AT&N=x A value from 0 to 31
Sportster Flash x2 - User’s Guide 19
Limiting the Lowest Possible Connect Speed
The &U command allows you to limit the lowest possible connect
speed. If a remote modem attempts to connect to your Courier with x2
at a speed lower than &U, your Sportster with x2 will not allow it to
connect.
To limit the Use this command Where x is
Lowest possible
connect speed
Note: See table 12.4 for a list of connect speed values.
AT&U=x A value from 0 to 31
Limiting a Range of Possible Connect Speeds
By setting &N and &U values, you can limit the range of speeds at
which your Sportster with x2 connects. If a remote modem does not
connect to your Sportster with x2 at a range between the speeds
designated by the &N and &U commands, your Sportster with x2 will
not allow it to connect.
Note: The link speed associated with the &U argument cannot be
greater than the link speed associated with &N argument.
Use the following table to understand the relationship between &U and
&N commands:
If &U And &N Then your modem
Equals
zero
Equals zero Connects at the highest possible
speed.
Is greater than
zero
Connects at the &N speed only.
Is greater
than zero
20 Sportster Flash x2 - User’s Guide
Is greater than
zero and greater
than &U
Connects at the highest possible
speed in the range from &U to &N.
&N and &U Command Values
Use the following table for a complete list of &N and &U link speeds
and their associated indexes:
Link
Speed
Highest 0 21600 11 45333 22
300 1 24000 12 46666 23
1200 2 26400 13 48000 24
2400 3 28800 14 49333 25
4800 4 31200 15 50666 26
7200 5 33600 16 52000 27
9600 6 33333 17 53333 28
12000 7 37333 18 54666 29
14400 8 41333 19 56000 30
16800 9 42666 20 57333 31
19200 10 44000 21
Index Link
Speed
Index Link
Speed
Index
Note: For x2-mode links, &N and &U are used to constrain the speed of
the higher speed direction of the link.
Sportster Flash x2 - User’s Guide 21
Troubleshooting x2 Client Connections
Use the chart below to understand issues affecting your Sportster
modem and how to fix them:
Step This may be the issue Do this
x2 may not be enabled
1
on your Sportster.
x2 protocol issues
2
Your Sportster may be
3
connected to the public
network via a PBX or
other telephone
equipment with
analogue-to-digital and
digital-to-analogue
conversions.
See the section “How to Tell if x2 is
Enabled” (Use the ATI7 command)
Use the ATI11 command and check the
“x2 status” field for more information.
If this message
appears
“Multiple
CODECS in
channel”
“Remote
modem is not
x2”
“Channel is x2capable but
feature is not
installed”
Contact your telephone equipment vendor
for information about obtaining pure
analogue service.
Due to extra analogue-to-digital
conversions performed by some PBX’s
and other telephone equipment, x2 client
modems may not be able to make x2
connections.
You cannot use x2
because
There are multiple
analogue-to-digital
conversions on the
channel.
The remote modem
does not support x2.
The modem has not
been upgraded to x2.
There is another issue. Do the following:
4
• Visit the 3Com, U.S. Robotics brand
x2 Web Site at http://www.3Com.com
• Contact 3Com Technical Support
22 Sportster Flash x2 - User’s Guide
New x2 Result Codes
Use the following table for a list of all result codes, including new x2
result codes:
Numeric Alphanumeric
180 CONNECT 33333
181 CONNECT 33333/ARQ
182 CONNECT 33333/x2
183 CONNECT 33333/ARQ/x2
184 CONNECT 37333
185 CONNECT 37333/ARQ
186 CONNECT 37333/x2
187 CONNECT 37333/ARQ/x2
188 CONNECT 41333
189 CONNECT 41333/ARQ
190 CONNECT 41333/x2
191 CONNECT 41333/ARQ/x2
192 CONNECT 42666
193 CONNECT 42666/ARQ
194 CONNECT 42666/x2
195 CONNECT 42666/ARQ/x2
196 CONNECT 44000
197 CONNECT 44000/ARQ
198 CONNECT 44000/x2
199 CONNECT 44000/ARQ/x2
200 CONNECT 45333
201 CONNECT 45333/ARQ
202 CONNECT 45333/x2
203 CONNECT 45333/ARQ/x2
204 CONNECT 46666
205 CONNECT 46666/ARQ
206 CONNECT 46666/x2
Sportster Flash x2 - User’s Guide 23
New x2 Result Codes (Continued)
Numeric Alphanumeric
207 CONNECT 46666/ARQ/x2
208 CONNECT 48000
209 CONNECT 48000/ARQ
210 CONNECT 48000/x2
211 CONNECT 48000/ARQ/x2
212 CONNECT 49333
213 CONNECT 49333/ARQ
214 CONNECT 49333/x2
215 CONNECT 49333/ARQ/x2
216 CONNECT 50666
217 CONNECT 50666/ARQ
218 CONNECT 50666/x2
219 CONNECT 50666/ARQ/x2
220 CONNECT 52000
221 CONNECT 52000/ARQ
222 CONNECT 52000/x2
223 CONNECT 52000/ARQ/x2
224 CONNECT 53333
225 CONNECT 53333/ARQ
226 CONNECT 53333/x2
227 CONNECT 53333/ARQ/x2
228 CONNECT 54666
229 CONNECT 54666/ARQ
230 CONNECT 54666/x2
231 CONNECT 54666/ARQ/x2
232 CONNECT 56000
233 CONNECT 56000/ARQ
234 CONNECT 56000/x2
235 CONNECT 56000/ARQ/x2
24 Sportster Flash x2 - User’s Guide
Troubleshooting
Before the modems connect…
If your modem doesn't respond to any AT commands,
· Make sure the modem is on.
· Make sure you selected the correct COM port and IRQ in your
communications software, and/or in your Windows Control
Panel.
· Make sure the computer is in Terminal mode.
· Type in all upper (AT) or lower (at) case.
· There may be a COM port/IRQ conflict. Try alternative IRQ/
COM port settings.
If your modem displays double characters on your monitor,
· Both your modem's and software's local echoes are on and need
to be turned off by typing the command ATE0<Enter>.
If your modem doesn't go off hook to dial a number or doesn't
answer the phone,
· Make sure the phone lead is connected to the socket on the
modem labelled TELCO and to a phone wall socket.
· Review your software manual to see what DTR operations are
required.
· Make sure that your software has auto answer enabled.
If both modems exchange carrier signals but fail to establish a
communications link,
· Place the call again. The telephone company routes all calls,
even local calls, differently each time you call.
· Call a different modem to see if the problem persists.
Sportster Flash x2 - User’s Guide 25
The problem may be with the modem you first tried to call.
If your modem doesn't connect at 2400 bps with a 2400 bps
modem,
· The remote modem might be an older 2400 bps modem that
does not support error control. Disable error control with the
following command: AT&M0<Enter>
· Try connecting with the remote modem again.
· When the call is finished, remember to reset the modem:
ATZ<Enter>
During data transfer…
If your screen displays random or garbage characters,
· Set your software to the same word length, parity, and Stop bits
as the remote modem.
· Make sure that your software and modem are set to the same
flow control setting and to either a fixed or variable serial port
rate.
· Type the following command to load the template that enables
hardware flow control as well as other optimal settings.
AT&F1<Enter>
· Disable any Terminate and Stay Resident (TSR) programs
running in the background.
If your communications software is reporting many Cyclic
Redundancy Check (CRC) errors and low Characters Per Second
(CPS),
· You might have a bad phone line. Place the call again. The
phone company routes calls differently each time you call.
· Type the following command to load the template that enables
hardware flow control as well as other optimal settings:
AT&F1<Enter>
· Lower the serial port rate in your communications software to
38,400 bps or 19,200 bps.
· Try a different file transfer protocol (do not use Xmodem if other
protocols are available). Disable any Terminate and Stay
Resident (TSR) programs running in the background.
26 Sportster Flash x2 - User’s Guide
If errors are occurring in your V.17 fax transmissions,
· Enter the following initialisation string in your software modem
set-up screen: AT&H3&I2&R2S7=60
· Disable any Terminate and Stay Resident (TSR) programs that
are running in the background.
· If your problems occur when you send faxes from Windows and
your computer has a 16550 UART, load the comdriver that came
with your fax software. (This may require re-installing the software.)
If you are running DOS 6.0, run the following DOS program before
you run your fax software.
· Type VER at the DOS prompt to determine your version of
DOS.
· Run the program MEMMAKER.EXE from the DOS directory
prompt. This program loads all of your Terminate and Stay
Resident (TSR) programs in the most efficient order.
Sportster Flash x2 - User’s Guide 27
28 Sportster Flash x2 - User’s Guide
U.S. Robotics On-line Resources
Connecting to the U.S. Robotics BBS
To connect to the U.S. Robotics Bulletin Board System (BBS), dial
33320910308 If this is your first time connecting to our BBS, you will
be asked to enter your name and a password and to fill out a
questionnaire.
Internet FTP
The Internet FTP provides a free library containing the same files as
the BBS site. To access the FTP site type ftp.usr.com.
Internet on Demand
The Internet on Demand (IOD) provides automatic technical support
through a library containing product information, quick reference cards,
and installation help. To obtain an index of available documents, send
a blank e-mail to eurosupport@usr.com. To have a document emailed to you, place the document's number in the subject field.
World Wide Web
The U.S. Robotics Home Page contains the same information as the
Internet on Demand listing, as well as information about U.S. Robotics.
To log on to the Web, type http://www.3Com.com.
CompuServe
Access the same information as the Internet FTP site through
CompuServe.
Sportster Flash x2 - User’s Guide 29
America Online
Connect to the U.S. Robotics Forum through America Online. Go to
the Keyword field and type USROBOTICS to connect to the various
U.S. Robotics resources, such as libraries, message boards, online
customer support, and product announcements.
Fax and Technical Support Hotline
Technical questions about U.S. Robotics modems can also be
answered via fax or by technical support representatives.
Hotline: +33 (0) 3 20 19 24 24
Fax: +33 (0) 3 20 19 24 34
Are You Still Having Problems?
• Re-read this manual, especially the Remarks on Using the
Modem section.
• Contact your reseller who will be able to provide you with the
necessary assistance. This is much more efficient and less
costly than sending the modem back to us for a problem that is
possibly only a simple matter of adjusting the settings.
• If your reseller can’t help you, contact U.S. Robotics Customer
Support. When you call, specify your modem serial number
(found on the outside of the box), the software being used, and
if possible, the contents of your ATI7 screen.
Hotline: +33 (0) 3 20 19 24 24
Fax: +33 (0) 3 20 19 24 34
USR BBS: +33 (0) 3 20 91 03 08
CompuServe: GO USROBOTICS
Internet: eurosupport@usr.com
30 Sportster Flash x2 - User’s Guide
If You Must Return the Modem to Us
• Contact U.S. Robotics Customer Support to obtain a Return
Materials Authorisation (RMA) number. You must have an RMA
number before returning the modem to us.
Phone : +33 (0) 3 20 87 04 97
Fax : +33 (0) 3 20 87 06 94
• Ship the unit, postage paid, in a strong box made of
corrugated cardboard with plenty of packing material
(preferably the original container.)
• Include your RMA number, name and address on the
shipping label as well as inside the package.
• Ship to the following address:
U.S. Robotics Logistics sarl
European Repair Center
RMA#
Rue Jules Verne
Centre de Gros N°2
F-59818 Lesquin Cedex
France
Sportster Flash x2 - User’s Guide 31
32 Sportster Flash x2 - User’s Guide
Glossary
Cross references are printed in boldface. Cross references with items in
the Command Summary chapter are printed in italics.
Analogue Loopback
A modem self-test in which data from the keyboard or an internal test
pattern is sent to the modem's transmitter, modulated into analogue
form, looped back to the receiver, and demodulated into digital form.
Analogue Signals
A variety of signals and wavelengths that can be transmitted over
communications lines such as the sound of a voice over the phone line.
Contrast with digital signals.
Answer Mode
The mode used by your modem when answering an incoming call from
an originating modem. The transmit/receive frequencies are the reverse
of the originating modem, which is in Originate mode.
Application
A computer program designed to perform a specific function, such as a
word processor or a spreadsheet.
ARQ
Automatic Repeat reQuest. A general term for a function that
automatically allows your modem to detect flawed data and retransmit
it. See MNP and V.42.
ASCII
American Standard Code for Information Interchange.
A 7bit binary code (0's, 1's) used to represent letters, numbers, and
special characters such as $, !, and /.
Sportster Flash x2 - User’s Guide 33
Asynchronous Transmission
Data transmission in which the length of time between transmitted
characters may vary. Because the time lapses between transmitted
characters are not uniform, the receiving modem must be signalled as
to when the data bits of a character begin and when they end. The
addition of Start and Stop bits to each character serves this purpose.
Auto Answer
Sets the modem to pick up the phone line when it detects a certain
number of rings. See S-register (S0) in Technical Quick Reference.
Auto Dial
A process where your modem dials a call for you. The dialling process
is initiated by sending an ATDT (dial tone) or ATDP (dial pulse)
command followed by the telephone number to dial. Auto Dial is used
to dial voice numbers. See command Dn.
Baud Rate
A term used to measure the speed of an analogue transmission from
one point to another. Although not technically accurate, baud rate is
commonly used to mean bit rate.
Binary Digit
A 0 or 1, reflecting the use of the binary numbering system (only two
digits). Used because the computer recognises either of two states,
OFF or ON. Shortened form of binary digit is bit.
Bit Rate
Also referred to as transmission rate. The number of binary digits, or
bits, transmitted per second (bps). Communications channels using
telephone channel modems are established at set bit rates, commonly
300, 1200, 2400, 4800, 9600, 14,400 and higher.
Bits Per Second (BPS)
The bits (binary digits) per second rate. Thousands of bits per second
are expressed as kilobits per second or kbps.
Buffer
A memory area used as temporary storage during input and output
operations. An example is the modem's command buffer.
34 Sportster Flash x2 - User’s Guide
Byte
A group of binary digits stored and operated upon as a unit. A byte
may have a coded value equal to a character in the ASCII code (letters,
numbers) or have some other value meaningful to the computer. In
user documentation, the term usually refers to 8-bit units or characters.
1 kilobyte (Kbyte) is equal to 1,024 bytes or characters; 640 Kbytes
indicates 655,360 bytes or characters.
Carrier
A tone signifying a connection the modem can alter to communicate
data across telephone lines.
Character
A representation, coded in binary digits, of a letter, number, or other
symbol.
Characters Per Second (CPS)
A data transfer rate generally estimated from the bit rate and the
character length. For example, at 2400 bps,
8-bit characters with Start and Stop bits (for a total of ten bits per
character) will be transmitted at a rate of approximately 240 characters
per second (cps). Some protocols, such as error-control protocols,
employ advanced techniques such as longer transmission frames and
data compression to increase cps.
Class 1 and 2.0
International standards used between facsimile application programs
and facsimile modems for sending and receiving faxes.
Cyclic Redundancy Checking (CRC)
An error-detection technique consisting of a cyclic algorithm performed
on each block or frame of data by both sending and receiving modems.
The sending modem inserts the results of its computation in each data
block in the form of a CRC code. The receiving modem compares its
results with the received CRC code and responds with either a positive
or negative acknowledgement.
Data Communications
A type of communications in which computers are able to exchange
data over an electronic medium.
Sportster Flash x2 - User’s Guide 35
Data Compression Table
A table containing values assigned for each character during a call
under MNP5 data compression. Default values in the table are
continually altered and built during each call: the longer the table, the
more efficient throughput gained.
Data Mode
The mode in which the fax modem is capable of sending and receiving
data files. A standard modem without fax capabilities is always in data
mode.
DCE
Data Communications (or Circuit-Terminating) Equipment, such as dialup modems that establish and control the data link via the telephone
network.
Default
Any setting assumed, at startup or reset, by the computer's software
and attached devices, and operational until changed by the user or
software.
Detect Phase
In the ITU-T V.42 error-control protocol, the first stage in establishing if
both modems attempting to connect have V.42 capability.
Dictionary
The term used for compression codes built by the V.42 bis data
compression algorithm.
Digital Loopback
A test that checks the modem's RS-232 interface and the cable that
connects the terminal or computer and the modem. The modem
receives data (in the form of digital signals) from the computer or
terminal, and immediately returns the data to the screen for verification.
Digital Signals
Discrete, uniform signals. In this manual, the term refers to the binary
digits 0 and 1. Contrast with analogue signals.
36 Sportster Flash x2 - User’s Guide
DTE
Data Terminal (or Terminating) Equipment. A computer that generates
or is the final destination of data.
Duplex
Indicates a communications channel capable of carrying signals in both
directions. See Half Duplex, Full Duplex.
EIA
Electronic Industries Association, which defines electronic standards in
the U.S.
Error Control
Various techniques that check the reliability of characters (parity) or
blocks of data. V.42 and MNP error-control protocols use error
detection (CRC) and retransmission of flawed frames (ARQ).
Facsimile
A method for transmitting the image on a page from one point to
another. Commonly referred to as fax.
Fax Mode
The mode in which the fax modem is capable of sending and receiving
files in a facsimile format. See definitions for V.17, V.27ter, V.29.
Flow Control
A mechanism that compensates for differences in the flow of data input
to and output from a modem or other device. See commands &Hn, &In,
&Rn.
Frame
A data communications term for a block of data with header and trailer
information attached. The added information usually includes a frame
number, block size data, error-check codes, and Start/End indicators.
Full Duplex
Signal flow in both directions at the same time. In microcomputer
communications, may refer to the suppression of the on-line Local
Echo.
Sportster Flash x2 - User’s Guide 37
Half Duplex
Signal flow in both directions, but only one way at a time. In
microcomputer communications, may refer to activation of the on-line
Local Echo, which causes the modem to send a copy of the
transmitted data to the screen of the sending computer.
Hz
Hertz, a frequency measurement unit used internationally to indicate
one cycle per second.
ITU-T
An international organisation that defines standards for telegraphic and
telephone equipment. For example, the Bell 212A standard for 1200bps communication in North America is observed internationally as
ITU-T V.22. For 2400-bps communication, most U.S. manufacturers
observe V.22 bis. The initials ITU-T represent the ‘International
Telecommunications Union - Telecommunications sector’.
LAPM
Link Access Procedure for Modems, an error-control protocol defined
in ITU-T Recommendation V.42. Like the MNP protocols, LAPM uses
cyclic redundancy checking (CRC) and retransmission of corrupted data
(ARQ) to ensure data reliability.
Local Echo
A modem feature that enables the modem to display keyboard
commands and transmitted data on the screen. See command Hn.
MNP
Microcom Networking Protocol, an error-control protocol developed by
Microcom, Inc., and now in the public domain. There are several
different MNP protocols, but the most commonly used one ensures
error-free transmission through error detection (CRC) and
retransmission of errored frames.
Modem
A device that transmits/receives computer data through a
communications channel such as radio or telephone lines. It also
changes signals received from the phone line back to digital signals
before passing them to the receiving computer.
38 Sportster Flash x2 - User’s Guide
Non-volatile Memory (NVRAM)
User-programmable random access memory whose data is retained
when power is turned off. On the Sportster, it includes four stored
phone numbers and the modem settings.
OFF/ON Hook
Modem operations that are the equivalent of manually lifting a phone
receiver (taking it off-hook) and replacing it (going on-hook).
On-line Fallback/Fall Forward
A feature that allows high-speed, error-control modems to monitor line
quality and fall back to the next lower speed in a defined range if line
quality diminishes; as line conditions improve, the modems switch up to
the next higher speed.
Originate Mode
The mode used by your modem when initiating an outgoing call to a
destination modem. The transmit/receive frequencies are the reverse
of the called modem, which is in Answer mode.
Parity
A simple error-detection method that checks the validity of a
transmitted character. Character checking has been surpassed by
more reliable and efficient forms of error checking, including V.42 and
MNP 2-4 protocols. Either the same type of parity must be used by two
communicating computers, or both may omit parity.
Protocol
A system of rules and procedures governing communications between
two or more devices. Protocols vary, but communicating devices must
follow the same protocol in order to exchange data. The format of the
data, readiness to receive or send, error detection and error correction
are some of the operations that may be defined in protocols.
RAM
Random Access Memory. Memory that is available for use when the
modem is turned on, but that clears of all information when the power is
turned off. The modem's RAM holds the current operational settings, a
flow control buffer, and a command buffer.
Sportster Flash x2 - User’s Guide 39
Remote Digital Loopback
A test that checks the phone link and a remote modem's transmitter and
receiver.
Remote Echo
A copy of the data received by the remote system, returned to the
sending system, and displayed on the screen. Remote echoing is a
function of the remote system.
ROM
Read Only Memory. Permanent memory, not user-programmable.
Serial Transmission
The consecutive flow of data in a single channel. Compare to parallel
transmissions where data flows simultaneously in multiple channels.
Start/Stop Bits
The signalling bits attached to a character before the character is
transmitted during Asynchronous Transmission.
Terminal
A device whose keyboard and display are used for sending and
receiving data over a communications link. Differs from a
microcomputer or a mainframe in that it has little or no internal
processing capabilities.
Terminal Mode
Software mode that allows direct communication with the modem. Also
known as command mode.
Throughput
The amount of actual user data transmitted per second without the
overhead of protocol information such as Start and Stop bits or frame
headers and trailers. Compare characters per second.
V.8
The ITU-T standard specification that covers the initial handshaking
process.
40 Sportster Flash x2 - User’s Guide
V.17 Fax
A ITU-T standard for making facsimile connections at 14400 bps,
12000 bps, 9600 bps, 7200 bps.
V.21
A ITU-T standard for modems operating in asynchronous mode at
speeds up to 300 bps, full-duplex, on public switched telephone
networks.
V.22
A ITU-T standard for modem communications at 1200 bps, compatible
with the Bell 212A standard observed in the U.S. and Canada.
V.22 bis
A ITU-T standard for modem communications at 2400 bps. The
standard includes an automatic link negotiation fallback to 1200 bps
and compatibility with Bell 212A/V.22 modems.
V.27
A ITU-T standard for facsimile operations that specifies modulation at
4800 bps, with fallback to 2400 bps.
V.29
A ITU-T standard for facsimile operations that specifies modulation at
9600 bps, with fallback to 7200 bps.
V.32
A ITU-T standard for modem communications at 9600 bps and 4800
bps. V.32 modems fall back to 4800 bps when line quality is impaired.
V.32 bis
A ITU-T standard that extends the V.32 connection range: 4800, 7200,
9600, 12000, and 14400 bps. V.32 bis modems fall back to the next
lower speed when line quality is impaired, fall back further as
necessary, and also fall forward (switch back up) when line conditions
improve.
V.34
An ITU-T standard that currently allows data rates as high as 33,600
bps.
Sportster Flash x2 - User’s Guide 41
V.42
A ITU-T standard for modem communications that defines a two-stage
process of detection and negotiation for LAPM error control.
V.42 bis
An extension of ITU-T V.42 that defines a specific data compression
scheme for use during V.42 connections.
Xmodem
The first of a family of error control software protocols used to transfer
files between modems. These protocols are in the public domain and
are available from many bulletin board services.
XON/XOFF
Standard ASCII control characters used to tell an intelligent device to
stop/resume transmitting data.
Ymodem
An error-checking protocol that can send several files of data at a time
in 1024-byte (1K) blocks. This protocol can use either checksums or
CRC for error checking.
Ymodem G
Similar to Ymodem, except it includes no error checking, which makes
it faster.
Zmodem
Similar to Xmodem and Ymodem, except it includes batch transfer, the
ability to recover from a partially complete transfer, an autostart
feature, and improved efficiency.
42 Sportster Flash x2 - User’s Guide
Quick Reference
Introduction
The Quick Reference appendix includes information about the
following:
· Front Panel Lights
· Command Summary
· S-Registers
Sportster Flash x2 - User’s Guide 43
Front Panel Lights
Symbol Meaning Status
AA Auto Answer/ Answer mode: ON when
Answer register S0 is set to 1 or higher
(Auto Answer), and when
answering a call; OFF when modem
originates a call. Light flashes when
there is an incoming call.
CD Carrier Detect ON if modem receives a valid data
signal (carrier) from a remote
modem, indicating that data
transmission is possible. Always ON
if CD override is ON (&C0).
RD Received Data Flashes when modem sends result
codes or passes received data bits.
SD Send Data Flashes when computer sends a
data bit.
TR Data Terminal ON if modem receives a DTR
Ready signal from computer.
Always ON (modem ignores DTR) if
the DTR override is ON (&D0).
CS Clear to Send ON until modem lowers CTS when
Transmit Data hardware flow control
is enabled (&H1, &H3).
ARQ/ Error Control/ Data Mode: Automatic Repeat
Request.
FAX Fax Operations ON if modem is set to &M4 or &M5
and successfully establishes an
error control connection. Flashes
when modem retransmits data to
remote modem. Fax Mode: Flashes
to indicate fax mode.
OH Off Hook ON when modem accesses the
phone line. OFF when modem is
On Hook.
44 Sportster Flash x2 - User’s Guide
Command Summary
· Type commands in either upper or lower case, not a
combination. Use the Backspace key to delete errors. (You
cannot delete the original AT command since it is not stored in
the modem buffer.)
· If a command has numeric options and you don’t include a
number, zero is assumed. For example, if you type ATB, the
command ATB0 is assumed.
· Every command but A/, +++ and A> must begin with the AT
prefix and be entered by pressing a carriage return (Enter key).
· The maximum command length is 60 characters. The modem
doesn’t count the AT prefix, carriage returns, or spaces.
Note: Defaults are marked with an asterisk (*).
Command Set
$ Displays a basic command list; on-line help.
A Manual Answer: goes off hook in answer mode.
Pressing any key aborts the operations.
A/ Re-executes the last issued command. Used
mainly to redial. This does not require the AT
prefix or a Carriage Return.
Any key Aborts off-hook dial/answer operation and
hangs up.
AT Required command prefix, except with A/ and +++.
Use alone to test for OK result code.
Bn U.S./ITU-T answer sequence.
* B0 ITU-T V.25 answer sequence
B1 U.S. answer tone
Sportster Flash x2 - User’s Guide 45
Dn Dials the specified phone number. Includes the
following:
* P Pulse (rotary) dial
T Tone dial
, (Comma) Two-second pause; linked to S8
register
; (Semicolon) Return to Command mode
after dialling
! (Exclamation point) Flashes the switch
hook
W Wait for second dial tone (X3 or higher);
linked to S6 register
@ Dials, waits for quiet answer, and continues
(X3 or higher)
R Originates call using answer (reverse)
frequencies
#,* Extended touch tone pad tones
DL Dials the last-dialled number.
DSn Dials the phone number string stored in NVRAM
at position n (n = 0*3). Phone numbers are
stored with the &Zn=s command.
D$ Displays a list of Dial commands.
En Sets local echo.
E0 Echo OFF
* E1 Modem displays keyboard commands
Fn Sets online local echo of transmitted data ON/OFF.
F0 Local echo ON. Modem sends a copy of
data it sends to the remote system to your
screen.
* F1 Local echo OFF. Receiving system may
send a remote echo of data it receives.
46 Sportster Flash x2 - User’s Guide
Hn Controls ON/OFF hook.
H0 Hangs up (goes on hook)
H1 Goes off hook
In Displays the following information.
I0 Four-digit product code
I1 Results of ROM checksum
I2 Results of RAM self test
I3 Product type
I4 Current modem settings
I5 Nonvolatile memory (NVRAM) settings
I6 Link diagnostics
I7 Product configuration
I9 Plug and Play information
I11 Call statistics
Ln Controls speaker volume.
L0 Lowest
L1 Low
* L2 Medium
L3 High
Mn Operates speaker.
M0 Speaker always OFF
* M1 Speaker ON until CONNECT
M2 Speaker always ON
M3 Speaker ON after dial, until CONNECT
On Returns online.
O0 Returns online
O1 Returns online and retrains
P Sets pulse dial (for phone lines that don’t support
touch-tone dialling).
Sportster Flash x2 - User’s Guide 47
Qn Displays/suppresses result codes.
* Q0 Displays result codes
Q1 Quiet mode; no result codes
Q2 Displays result codes only in Originate
mode
Q3 Displays result codes only in Ring mode.
Sr.b=n Sets bit .b of register r to n (0/OFF or 1/ON).
Sr=n Sets register r to n.
Sn? Displays contents of S-Register n.
S$ Displays a list of the S-Registers.
T Sets tone dial.
Vn Displays verbal/numeric result codes.
V0 Numeric codes
* V1 Verbal codes
48 Sportster Flash x2 - User’s Guide
Xn Sets result code displayed. Default is X4.
Xn Setting
Result Codes X0 X1 X2 X3 X4
155/CONNECT 33600 • • • • •
180/CONNECT 33333 • • • • •
184/CONNECT 37333 • • • • •
188/CONNECT 41333 • • • • •
192/CONNECT 42666 • • • • •
196/CONNECT 44000 • • • • •
200/CONNECT 45333 • • • • •
204/CONNECT 46666 • • • • •
208/CONNECT 48000 • • • • •
212/CONNECT 49333 • • • • •
216/CONNECT 50666 • • • • •
220/CONNECT 52000 • • • • •
224/CONNECT 53333 • • • • •
228/CONNECT 54666 • • • • •
232/CONNECT 56000 • • • • •
236/CONNECT 57333 • • • • •
Functions
Adaptive Dialling • • •
Wait for 2nd Dial Tone (W) • •
Wait for Answer (@) • •
Fast Dial • •
* Requires @ in dial string; replaces NO CARRIER
Sportster Flash x2 - User’s Guide 49
Yn Selects power-on/reset default configuration.
* Y0 Default is profile 0 setting in NVRAM
Y1 Default is profile 1 setting in NVRAM
Y2 Generic Template (&F0)
Y3 Hardware Flow Control (&F1)
Y4 Software Flow Control (&F2)
Zn Resets modem.
Z0 Resets modem to NVRAM profile selected
by Y command
Z1 Resets modem to NVRAM profile 0
Z2 Resets modem to NVRAM profile 1
Z3 Resets modem to factory default profile 0 (&F0)
Z4 Resets modem to factory default profile 1 (&F1)
Z5 Resets modem to factory default profile 2 (&F2)
&$ Displays a list of ampersand (&) commands.
&An Enables/disables ARQ codes.
&A0 ARQ result codes disabled
&A1 ARQ result codes enabled
&A2 V- modulation indicator added
* &A3 Protocol indicators added - LAPM/MNP/NONE
(error control) and V42bis/MNP5 (data
compression)
&Bn Sets modem’s serial port rate.
&B0 Variable, follows connection rate
* &B1 Fixed serial port rate
&B2 Fixed in ARQ mode, variable in non-ARQ mode
&Cn Controls Carrier Detect (CD) signal.
&C0 CD override
* &C1 Normal CD operations
&Dn Controls Data Terminal Ready (DTR) operations.
&D0 DTR override
&D1 Reserved
* &D2 Normal DTR operations
50 Sportster Flash x2 - User’s Guide
&Fn Loads a read-only (non-programmable) factory
configuration.
&F0 Generic template
&F1 Hardware flow control template
&F2 Software flow control template
&Hn Sets Transmit Data(TD) flow control (also see &Rn)
&H0 Flow control disabled
* &H1 Hardware flow control, Clear to Send (CTS)
&H2 Software flow control, XON/XOFF
&H3 Hardware and software flow control
&In Sets Receive Data (RD) software flow control
(see also &Rn).
* &I0 Software flow control disabled
&I1 XON/XOFF signals to your modem and remote
system
&I2 XON/XOFF signals to your modem only
&Kn Enables/disables data compression.
&K0 Data compression disabled
* &K1 Auto enable/disable
&K2 Data compression enabled
&K3 MNP5 compression disabled
&Mn Sets Error Control (ARQ) 1200 bps and higher.
&M0 Normal mode, error control disabled
&M1 Reserved
&M2 Reserved
&M3 Reserved
* &M4 Normal/ARQ
&M5 ARQ mode
Sportster Flash x2 - User’s Guide 51
&Nn Sets connect speed. If connection cannot be established at
this speed, the modem will hang up.
* &N0 Variable rate
&N1 300 bps
&N2 1200 bps
&N3 2400 bps
&N4 4800 bps
&N5 7200 bps
&N6 9600 bps
&N7 12,000 bps
&N8 14,400 bps
&N9 16,800 bps
&N10 19,200 bps
&N11 21,600 bps
&N12 24,000 bps
&N13 26,400 bps
&N14 28,800 bps
&N15 31,200 bps
&N16 33,600 bps
&N17 33,333 bps
&N18 37,333 bps
&N19 41,333 bps
&N20 42,666 bps
&N21 44,000 bps
&N22 45,333 bps
&N23 46,666 bps
&N24 48,000 bps
&N25 49,333 bps
&N26 50,666 bps
&N27 52,000 bps
&N28 53,333 bps
&N29 54,666 bps
&N30 56,000 bps
&N31 57,333 bps
Note: When &N is used in conjunction with &U, &N sets the highest
speed at which your modem will connect, and &U sets the lowest speed
at which the modems will connect. The factory default settings for
these values should be sufficient for most users.
52 Sportster Flash x2 - User’s Guide
&U=0
&N=0 &N>0
Connects at best possible
speed between your modem
and remote modem
Connects at speed defined
by &N
&U>0
&Rn Sets Receive Data (RD) hardware flow control,
* &R2 Received Data to computer only on RTS
&Sn Controls Data Set Ready (DSR) operations.
* &S0 DSR override; always ON
&Tn Begins test modes.
* &T5 Prohibits Remote Digital Loopback
Connects at any speed
faster than the value of &U.
Request to Send (RTS) (see also &In and &Hn).
&R0 Reserved
&R1 Modem ignores RTS
&S1 Modem controls DSR
&T0 Ends testing
&T1 Initiates Analogue Loopback
&T2 Reserved
&T3 Initiates Local Digital Loopback
&T4 Enables Remote Digital Loopback
&T6 Initiates Remote Digital Loopback
&T7 Initiates Remote Digital with self-test and
error detector
&T8 Initiates Analogue Loopback with self-test
and error detector
Connects at any speed
between &N and &U.
&Un Sets floor connect speed when &Un is set greater than 0.
&Nn is the ceiling connect speed. See &Nn.
* &U0 Disabled
&U1 300 bps
&U2 1200 bps
&U3 2400 bps
&U4 4800 bps
&U5 7200 bps
&U6 9600 bps
Sportster Flash x2 - User’s Guide 53
&U7 12,000 bps
&U8 14,400 bps
&U9 16,800 bps
&U10 19,200 bps
&U11 21,600 bps
&U12 24,000 bps
&U13 26,400 bps
&U14 28,800 bps
&U15 31,200 bps
&U16 33,600 bps
&U17 33,333 bps
&U18 37,333 bps
&U19 41,333 bps
&U20 42,666 bps
&U21 44,000 bps
&U22 45,333 bps
&U23 46,666 bps
&U24 48,000 bps
&U25 49,333 bps
&U26 50,666 bps
&U27 52,000 bps
&U28 53,333 bps
&U29 54,666 bps
&U30 56,000 bps
&U31 57,333 bps
&Wn Writes current configuration to NVRAM templates.
&W0 Modifies the NVRAM 0 template (Y0)
&W1 Modifies the NVRAM 1 template (Y1)
&Yn Sets break handling.
&Y0 Destructive, but doesn’t send break
* &Y1 Destructive, expedited
&Y2 Non-destructive, expedited
&Y3 Reserved
&Zn=s Writes phone number string s to NVRAM at position
n (n = 0*3).
&Zn=L Writes last executed dial string to NVRAM at position
n (n = 0*3).
&Zn? Displays the phone number stored at position
54 Sportster Flash x2 - User’s Guide
n (n = 0*3).
<Ctrl>C Cancels the display of the help screens.
<Ctrl>K Cancels the display of the help screens.
<Ctrl>S Pauses help screens.
+++ Escapes to online-command mode.
Sportster Flash x2 - User’s Guide 55
S-Registers
To change a setting, use the ATSr=n command, where r is the register
and n is a decimal value from 0*255 (unless otherwise indicated).
Register Default Function
S0 1 Sets the number of rings on which to
answer in Auto Answer Mode. When set
to 0, Auto Answer is disabled.
S1 0 Counts and stores the number of rings
from an incoming call (read only).
S2 43 Stores the ASCII decimal code for the
escape code character. Default character
is "+."
S3 13 Stores the ASCII code for the Carriage
Return character <CR>.
S4 10 Stores the ASCII decimal code for the Line
Feed character <LF>.
S5 8 Stores the ASCII decimal code for the
Backspace character <BS>.
S6 4 Sets the number of seconds the modem
waits for dial tone before dialling.
S7 60 Sets the number of seconds the modem
waits for a carrier or answers before
returning on-hook and sending a No Carrier
result code.
S8 2 Sets the duration, in seconds, for the pause
(,) option in the Dial command.
S9 6 Sets the required duration, in tenths of a
second, of the remote modem’s carrier signal
before recognition by your modem.
56 Sportster Flash x2 - User’s Guide
Register Default Function
S10 7 Sets the duration, in tenths of a second, that
the modem waits after loss of carrier before
hanging up. This guard time allows the
modem to distinguish between a line hit, or
other disturbances that momentarily break the
connection, from a true disconnect (hang up)
by the remote modem.
While we don’t recommend connecting the
modem to a line with call waiting, if you have
it, you may wish to adjust this setting upward
to prevent the modem from misinterpreting
the second call signal as a disconnect by the
remote modem. A better alternative is to ask
your phone company how to temporarily
disable call waiting (usually *70). For
example: ATDT *70 phone number.
Note: If you set S10 = 255, the modem will
not hang up when carrier is lost. Dropping
DTR hangs up the modem.
S11 72 Sets the duration and spacing, in
milliseconds, for tone dialling.
S12 50 Sets the duration, in fiftieths of a second, of
the guard time for the escape code
sequence.
Sportster Flash x2 - User’s Guide 57
Register Default Function
S13 0 Bit-mapped register. Select the bit(s) you
want on and set S13 to the total of the
values in the Value column. For example,
ATS13 = 17 enables bit 0 (value is 1) and
bit 4 (value is 16).
Bit Value Result
0 1 Reset when DTR drops.
1 2 Reset non-MNP transmit
buffer from 1.5K to 128
bytes.*
2 4 Set backspace key to delete.
3 8 On DTR signal, auto dial the
number stored in NVRAM at
position 0.
4 16 At power on/reset, Auto Dial
the number stored in NVRAM
at position 0.
5 32 Reserved.
6 64 Reserved.
7 128 Disconnect on escape code.
* The 1.5K-byte non-ARQ buffer allows data transfer with Xmodem- and
Ymodem-type file transfer protocols without using flow control.
The 128-byte option lets remote users with slower modems keep data
you’re sending from scrolling off their screens. When remote users
send your computer an XOFF (Ctrl-S) and you stop transmitting, the
data in transit from your modem’s buffer doesn’t exceed the size of
their screen.
This is also very helpful in situations when a remote modem/printer
application is losing characters.
58 Sportster Flash x2 - User’s Guide
Register Default Function
S14 0 Reserved.
S15 0 Bit-mapped register setup. To set the
register, see instructions for S13.
Bit Value Result
0 1 Disable ARQ/MNP for V.22.
1 2 Disable ARQ/MNP for
V.22 bis.
2 4 Disable ARQ/MNP for
V.32/V.32bis.
3 8 Disable MNP
handshake.
4 16 Disable MNP level 4.
5 32 Disable MNP level 3.
6 64 MNP incompatibility.
7 128 Disable V.42 operation.
S16 0 Bit-mapped register setup. To set the
register, see instructions for S13.
Bit Value Result
0 1 Reserved.
1 2 Touch tone dialling test.
2-7 4-128 Reserved.
S17 0 Reserved.
S18 0 Test timer for &T loopback testing.
Sets the time in seconds of testing
before the modem automatically times
out and terminates the test. When
set to 0, the timer is disabled. Valid
range is 1-255.
Sportster Flash x2 - User’s Guide 59
Register Default Function
S19 0 Sets the duration, in minutes, for the
inactivity timer. The timer activates when
there is no data activity on the phone line; at
time-out the modem hangs up. S19 = 0
disables the timer.
S20 0 Reserved.
S21 10 Sets the length, in 10-millisecond units, of
breaks sent from the modem to the computer;
applies to MNP or V.42 mode only.
S22 17 Stores the ASCII decimal code for the
XON character.
S23 19 Stores the ASCII decimal code for the
XOFF character.
S24 0 Reserved.
S25 20 Sets the duration, in hundredths of a
second, that DTR must be dropped so
that the modem doesn’t interpret a random
glitch as a DTR loss. (Most users will want to
use the default; this register is useful for
setting compatibility with older systems
running under older operating software.)
S26 0 Reserved.
60 Sportster Flash x2 - User’s Guide
Register Default Function
S27 1 Bit-mapped register setup. To set the
register, see instructions for S13.
Bit Value Result
0 1 Enables ITU-T V.21
modulation at 300 bps for
overseas calls; in V.21
mode, the modem answers
both overseas and domestic
(U.S. and Canada) calls, but
only originates V.21 calls.
(Default Bell 103)
1 2 Enables unencoded (non-
trellis coded) modulation in
V.32 mode; rarely used part
of ITU-T Recommendation
V.32.
2 4 Disables V.32 modulation.
3 8 Disables 2100 Hz answer
tone to allow two V.42
modems to connect
more quickly.
4 16 Enables V.23 fallback mode.
5 32 Disables V.32 bis mode.
6 64 Reserved.
7 128 Software compatibility mode.
This setting disables the
codes and displays the 9600
code instead. The actual rate
of the call can be viewed on
the ATI6 screen. Used for
unusual software
incompatibilities. Some
software may not accept
7200, 12.000 and 14.400 bps
or greater result codes.
Sportster Flash x2 - User’s Guide 61
Register Default Function
S28 0 Eliminates the V.32 answer tones for a faster
connection.
8 Default item, all times are in tenths of
seconds.
255 Disables all connections except V.32 at
9600 bps.
S29 20 Sets the duration, in tenths of a second, of
the V.21 answer mode fallback timer.
S30 20 Reserved.
S31 128 Volume control for speakerphone.
S32 2 Bit mapped register setup. To set the
register, see the instructions for S13.
Bit Value Result
0 1 V.8 Call Indicate enabled.
1 2 Enables V.8 mode.
2 4 Disable V.FC modulation.
3 8 Disable V.34 modulation.
4 16 Disable 33.6 kbps support.
5 32 Reserved.
6 64 Reserved.
7 128 Reserved.
S33 0 Bit mapped register setup. To set the register,
see the instructions for S13.
Bit Value Result
0 1 Disable 2400 symbol rate.
1 2 Disable 2743 symbol rate.
2 4 Disable 2800 symbol rate.
3 8 Disable 3000 symbol rate.
4 16 Disable 3200 symbol rate.
5 32 Disable 3429 rate.
6 64 Reserved.
7 128 Disable shaping.
62 Sportster Flash x2 - User’s Guide
Register Default Function
S34 0 Bit mapped register setup. To set registers,
see instructions for S13.
Bit Value Result
0 1 Disable 8S-2D trellis
encoding.
1 2 Disable 16S-4D trellis
encoding.
2 4 Disable 32S-2D trellis
encoding.
3 8 Disable 64S-4D trellis
encoding.
4 16 Disable non-linear coding.
5 32 Disable TX level deviation.
6 64 Disable Pre-emphasis.
7 128 Disable Pre-coding.
S35-S37 Reserved.
S38 0 Sets an optional delay, in seconds, before a
forced hang-up and clearing of the Transmit
buffer when DTR drops during an ARQ call.
This allows time for a remote modem to
acknowledge receipt of all transmitted data
before it is disconnected. The modem
immediately hangs up when DTR drops.
This option only applies to connections
terminated by dropping DTR. If the modem
receives the ATH command, it ignores S38
and immediately hangs up.
Sportster Flash x2 - User’s Guide 63
64 Sportster Flash x2 - User’s Guide
Sportster Flash Specifications
Compatibility Data: ITU-T V.34 (Inc. 33,600bps), V.FC, ITU-T
V.32bis, V.23, V.22 bis, V.22, V.21 and Bell 212A,
103.
Fax: Send and receive Group III Fax,
Class 1, Class 2.0; ITU-T V.17, V.29, V.27 ter
Speeds Data: 33.6K, 31.2K, 28.8K, 26.4K, 24K,
21.6K, 19.2K, 16.8K, 14.4K, 12K, 9600, 7200, 4800,
2400, 1200, 1200/75/1200, 300 bps
Fax: 14.4K, 12K, 9600, 7200, 4800, 2400
Error correction ITU-T V.42, MNP 2-4
Data compression ITU-T V.42 bis, MNP level 5
Operation Full/Half duplex on 2 wire telephone line
Format (DTE-DCE) Serial, binary, asynchronous
Command set Compatible with the AT command set; Fax mode: EIA
578 Class 1, EIA 592 Class 2.0
Flow control XON/XOFF, RTS/CTS
Telephone interface RJ11
Voice coding IMA ADPCM
Tone detection DTMF
Call differentiation Toggle between voice, fax and data
Silence detect Adjustable level and duration
Dialling Pulse (pulses 0-9),
tone (DTMF 0-9, #, *)
Call status Dial tone, busy tone, voice detect
Configuration storage Two modem configurations and four telephone
numbers
Transmission level -10dBm
Reception sensitivity -43dBm
Operating temperatureFrom 0 to +50 °C
Storage temperature From -40 to +70 °C
Transportation
temperature From -40 to +70 °C
Operating humidity From 20% to 80% without condensation
Storage humidity From 5% to 90% without condensation
Operating altitude 3000 meters
Sportster Flash x2 - User’s Guide 65
CE Mark
Electromagnetic Compatibility
This device complies with the following standards in accordance with
the European Directives 89/336/EEC.
• Immunity EN 50082-1 06/92
• Emission EN 55022 class B 08/87
Safety
This device complies with the following standards in accordance with
the European Directives 91/263/EEC
EN 60950/A2 10/93 and EN 41003 08/93
The ports on this modem have the following safety status:
• Telephone line connector = TNV
• All other ports = SELV
These definitions are classified as per safety standard:
EN 60950/A2 10/93.
• SELV: Safety Extra Low Voltage
• TNV: Telecommunications Network Voltage, voltages
in compliance with standard EN 41003 08/93 criteria.
Ringer Equivalence Number (REN)
The modem's REN (Ringer Equivalence Number) is 1.
The total of the RENs of all items connected to one telephone line must
not exceed 4. As long as the total is 4 or less, the ringing
characteristics of the connected items should not be affected.
66 Sportster Flash x2 - User’s Guide
Limited Warranty
U.S. Robotics warrants to the original end-user purchaser that this
product will be free from defects in materials and workmanship for a
period of five years from the date of purchase. During the limited
warranty period, and upon proof of purchase, the product will be
repaired or replaced (with the same or a similar model, which may be a
refurbished model) at U.S. Robotics’ option, without charge for either
parts or labor. This limited warranty shall not apply if the product is
modified, tampered with, misused, or subjected to abnormal working
conditions (including, but not limited to, lightning and water damage).
THIS LIMITED WARRANTY DOES NOT GUARANTEE YOU
UNINTERRUPTED SERVICE. REPAIR OR REPLACEMENT AS
PROVIDED UNDER THIS LIMITED WARRANTY IS THE EXCLUSIVE
REMEDY OF THE PURCHASER. THIS LIMITED WARRANTY IS IN
LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE OR
PURPOSE. U.S. ROBOTICS SHALL IN NO EVENT BE LIABLE FOR
ANY SPECIAL, INDIRECT, INCIDENTAL, PUNITIVE OR
CONSEQUENTIAL DAMAGES OF ANY KIND OR CHARACTER,
INCLUDING, WITHOUT LIMITATION, LOSS OF REVENUE OR
PROFITS, FAILURE TO REALIZE SAVINGS OR OTHER BENEFITS,
LOSS OF DATA OR USE, DAMAGE TO EQUIPMENT, AND CLAIMS
AGAINST THE PURCHASER BY ANY THIRD PERSON, EVEN IF U.S.
ROBOTICS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
This limited warranty gives you specific legal rights. You may have
others, which vary from nation to nation. Some nations do not allow
limitations on duration of an implied warranty, or the exclusion or
limitation of incidental or consequential damages, so the above
exclusion or limitation may not apply to you.
Sportster Flash x2 - User’s Guide 67
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