If you do not have a sound card, use COM3/IRQ5. Write COM3 and IRQ5 in the spaces provided on the first page of this manual. You will have to change the settings on your modem. Go to How to Change the Modems Settings on page 12. If you do have a sound card, use COM2/IRQ3. To use this setting, you have to first disable your computers second serial port (COM2). This is a pronged socket on the back of your computer. Go to your computer manufacturers manual. Find out which of the sockets on the back of your computer is the second serial port. If you have something plugged into that port, find out if you can plug it in somewhere else. Any accessory plugged
into that port will not work after the port has been disabled. Find out how to disable the COM port. Then return to this point in this manual to continue. After disabling COM2, you can use the COM2/IRQ3 setting. Write COM2 and IRQ3 on the first page of this manual and go to How to Change the Modems Settings on page 12. If ComTest reports that You do not have any available COM ports and/or IRQs We recommend you disable COM1 or COM2. When you disable one of these COM ports, you can use it and its default IRQ for your modem. Go to your computer manufacturers manual.
Find out which socket is COM1 and which is COM2. If nothing is plugged into either port, you can choose either of the ports to disable. Your computer manufacturers manual will tell you how to disable the COM port. If one port does not have anything plugged into it, note if the port is COM1 or COM2. This is the port youll want to disable for your modem. If both ports are being used, you may be able to attach one of the plugged-in accessories elsewhere so that you can disable its COM port. The accessory will not work once its port is disabled. If youve disabled COM1, you can now use the COM1/IRQ4 setting. Write it down on the first page of this manual. Go to How to Change the Modems Settings (on this page). 12
If youve disabled COM2, you can now use the COM2/IRQ3 setting. Write the setting down on the first page of this manual.
How to Change the Modems Settings
1. Always touch an unpainted metal part of your computer (the back is usually unpainted) to discharge static electricity before handling the modem. Static can damage your modem. Then take the modem out of its plastic bag. 2. Find the COM and IRQ jumper shunts (small black plastic pieces) on your modems jumper pins (see the following diagram).
3. To change the COM port and IRQ settings, you need to reposition the jumper shunts on the COM port and IRQ pins. To do this, lift the jumper shunts off the pins.
TIP: Grasp the jumper shunts with
The jumper shunts will be hanging from single jumper pins as shown in the following illustration. a tweezers or needle-nosed pliers. DO NOT grasp too firmly, as you may crush the shunts. If a jumper shunt seems stuck, gently rock it back and forth as you lift. Do not touch any other part of the modem or your computer with the tweezers/pliers. A shunt needs to be sitting on both jumper pins in order to effectively set the modem to the desired setting.

WARNING : The phone jack you
use must be for an ANALOG phone line (the type found in most homes). Many office buildings have digital phone lines. Be sure you know which type of line you have. The modem will be damaged if you use a digital phone line. 9. Plug one end of the phone cord that came with the modem into the TELCO jack at the rear of the modem. Plug the other end of the cord into the wall jack. 17
6. Once the modem is in place, fasten it firmly into place using the screw that you removed in step 4.
10.If you wish to use a phone through the same phone wall jack as the modem when the modem is not in use, plug your phones cord into the modems PHONE jack.
12.Start Windows. 13.If you have your modem set to COM1/IRQ4 or COM2/IRQ3, go to Software Installation and Testing on page 43. If you have your modem configured to any other setting, open Program Manager and double-click the Main icon.
NOTE: You cannot use the modem
and a phone at the same time if they share the same telephone line. 11. Plug the power cords, cables, and peripherals back into the computer and turn the computer on. 18 14.Double-click the Control Panel icon.
15.Double-click the Ports icon.
16.If its not already selected, click the COM port for your modem. Then click Settings.

17. Click Advanced.

19.Click OK.
18.In the Interrupt Request Line (IRQ) box, select the IRQ that ComTest recommended.
You will see a brief series of screens after the preceding screen. Click OK on each screen until you see a screen with a Close button. Click Close to exit Program Manager. You are now ready to install the software on the Connections CD-ROM (included with your Sportster modem). Turn to Software Installation and Testing (page 43) for detailed information about installing the software, registering the modem, and trying out your modem by faxing U.S. Robotics.
INTERNAL MODEM INSTALLATION WITH WINDOWS 95
Plug and Play Installation
With Windows 95, you may be able to simply plug your new modem into your computer, power up, and be ready to work. The operating system should do all the work of recognizing the modem for you. This section will guide you through this Plug and Play installation.
How to Prepare for Plug and Play Installation
1. Touch an unpainted metal part of your computer (the back is usually unpainted) to discharge static electricity. Static can damage your modem. 2. Take the modem out of its plastic bag.
3. Find the jumper shunts (small black plastic pieces) on the COM port and IRQ jumper pins on your modem. They should be in roughly the area indicated in the following illustration.
move them so they are hanging as in the following diagram.
NOTE: If you need to move the
When doing a Plug and Play installation, the jumper shunts should be placed so that they are hanging from single jumper pins rather than on pairs of pins. Your modems jumper shunts should already be in this Plug and Play configuration. If they are not, 22 shunts, grasp them with a tweezers or a needle-nosed pliers. DO NOT grasp too firmly, however, or you may crush the shunts. If a shunt seems stuck, try gently rocking it back and forth as you lift.

modem, write its serial number in the space provided on the first page of this manual. (Youll find the serial number underneath the bar code on the white sticker on the modem and on the outside of the box the modem came in.) If you ever need to call our customer support department, a customer support representative will ask you for the serial number. This will help him or her identify your Sportster modem.
CAUTION : To avoid risk of electric shock, make sure your computer and all peripheral devices are turned off and unplugged from electrical outlets.
4. Find an empty ISA expansion slot thats at least as long as the gold edge of your modem. (ISA slots are black plastic grooves lined with silver.) Unscrew and remove the expansion slot cover (the long narrow piece of metal that keeps dust from entering through the opening perpendicular to the slot). Be careful not to drop the screw into the computer. You will need it later to screw the modem into place.
5. Holding the modem at each corner, with the gold edge facing the slot, push the modem down as gently as possible until it snaps into the expansion slot. (Note: The following diagram shows horizontally aligned expansion slots. Some computers have vertically aligned slots. The instructions apply to both styles.) You need to apply a little pressure to seat the modem properly. Sometimes a gentle back-and-forth motion helps fit the modem all the way into the slot. If you feel resistance, the modem may not be properly lined up with the slot. Do not force it into the slot. Remove the modem and try again.
6. Once the modem is in the slot, screw the modem firmly into place using the screw that you removed in step 4. 7. Replace the computers cover and fasten it with the screws you removed in step 3. 8. Locate the wall jack you plan to use for the modem. If you have a phone plugged into 25
this jack, disconnect the phones cord from the jack.
use must be for an ANALOG phone line (the type found in most homes). Many office buildings have digital phone lines. Be sure you know which type of line you have. The modem will be damaged if you use a digital phone line. 9. Plug one end of the phone cord included with the modem into the TELCO jack at the rear of the modem. Plug the other end of the cable into the wall jack. 10.If you wish to use a phone through the same phone wall jack as the modem when the modem is not in use, plug your phones cord into the modems PHONE jack. 26

you need a shielded serial modem cable with a 9-pin female to 25-pin male connector. 36
use must be for an ANALOG phone line (the type found in most homes). Many office buildings have digital phone lines. Be sure you know which type of line you have. The modem will be damaged if you use a digital phone line. 5. If you wish to use your modem and phone through the same phone wall jack, plug your phone's cord into the modem's phone jack (labeled with a phone icon on the bottom of the case 6. Turn on your modem (the power switch is located on the front panel). Then turn on your computer and peripherals.
NOTE: You can not use the modem
and phone at the same time if they share the same telephone line.
1. When Windows restarts, the following screen appears automatically after a few seconds.
different letter name, type that letter instead of D.)
Click Driver from disk provided by hardware manufacturer. Then click OK. 2. When you see this screen, insert the Connections CD into your CD-ROM drive and type D:\ to replace the A:\. (NOTE: If your CD-ROM drive has a 38
3. Once Windows finishes loading the information from the CD-ROM, you should verify that the modem installation was a success. When your desktop returns, click the Windows Start button and point to Settings. Then click Control Panel.
5. In the Modems Properties screen, you should see Sportster 56000 Fax External PnP listed.
NOTE: If you do not see your
modem listed in the preceding screen, the installation was unsuccessful. Please refer to the Troubleshooting and Online Help Resources section (page 81) for possible solutions to your installation problem. 6. Next, click the Diagnostics tab at the top of the Modems Properties screen. Write down the COM setting for your modem. (Note: Your screen may show a different setting than that shown in the following screen.) You will need to know this setting when you install RapidComm later.
This means the installation was a success. Click OK. 40
Turn to Software Installation and Testing (page 43) for detailed information about installing the software, registering the modem, and trying out your modem by faxing U.S. Robotics. 41

SOFTWARE INSTALLATION AND TESTING
Software Installation and Registration Using the Setup Wizard
This section guides you through the U.S. Robotics Setup Wizard, the Connections CD-ROM interface, and the installation of RapidComm (fax/data software). It also shows you how to register and test your new Sportster modem. RapidComm fax/data software simplifies sending and receiving faxes directly from your computer desktop. You can build your own fax directory, send faxes to specified groups of phone numbers, request individual cover pages when necessary, and send individual faxes without exiting your word processing program. 42 Additionally, RapidComm lets you connect to BBSs and other online data providers. Take advantage of this access to enter a new world of information and entertainment.
NOTE: The following instructions
apply to Windows 3.x and Windows 95 users. However, only Windows 95 screens are shown.
NOTE: If you have an older
version of RapidComm installed on your system, uninstall it before continuing.
1. From the Windows 95 desktop, click the Start button and then click Run.
3. You will briefly see a screen that looks like this.
4. When you are asked if you wish to run the Setup Wizard, click Yes. 2. In the text box, type D:\setup.exe. (If your CD-ROM drive has a letter name other than D, type that letter in place of D.)
5. This is the Setup Wizards Welcome screen. After reading the screen, click Next.
6. When you see the following screen, select your modem from the list, verify that the COM port setting is correct, and then click Next.
NOTE: Check the COM port setting against the setting you wrote down during the hardware installation.
7. When you see the next two screens, fill in the blank boxes with the appropriate information, using the TAB key to move between fields. Click Next on each screen when you have filled in all of the necessary information.
8. You will see the following screen as the Setup Wizard creates a U.S. Robotics Connections program group.
10.The next screen introduces the U.S. Robotics Registration Wizard. After you read the screen, click Next. Read through each of the next two screens and verify or correct the information you typed earlier. Click Next on each screen to move on.

TIP: On external modems,

receiving a Data Terminal Ready signal causes the TR light to light up. In the upper left hand corner of this screen, you will find the current Connection Control settings. Click Help for quick definitions of terminology used in this screen.
Once you have configured your Connection Control settings, click Save to Modem to save your settings
If you look in the upper left hand corner of the display, you will see the commands currently in use. The Modem to Computer screen allows you to configure the following settings: LOCAL ECHO RESULT CODES RESULT CODE PREFERENCES

Using Modem to Computer

These settings control how your modem and computer communicate with each other. They control what you see on your terminal screen and how results are displayed. 76
TIP: If you type ATDT and see AATTDDTT on your screen, it is possible that both your software and modem have Local Echo set to ON. Turn Local Echo OFF on EITHER the modem or the software to solve this problem.
For details on using the commands in this screen, refer to the Glossary or Technical Quick Reference sections of this manual. Click Help to see quick definitions of terminology used in this screen. This screen also includes a chart of the ways result codes can be displayed. Click Codes to view a chart of the display options. Once you configure your settings, click Save to Modem to save your choices.
CONNECTION RATES The Connection Rates screen allows you to configure modem speeds and protocols.

WARNING! Use caution

when changing connection settings. Improper settings may cause your modem to function incorrectly, disconnect, or fail to connect at all.
In the upper left hand corner of the screen you will see the current connection commands. This screen allows you to configure the following settings: MODULATIONS V.34 SYMBOL RATES SPEEDS Again, once you have selected your settings, click Save to Modem to save them. When you are finished, click Exit to return to the Modem Configurator menu. Please refer to the main body of the manual and the Glossary for detailed information about the terminology and settings used in this screen. Click Help for quick definitions of terminology used in this screen. 78
DIALING/ANSWERING The next screen allows you to adjust how your modem initiates and receives calls.

You could have a conflict with the remote modems settings for word length, parity, and stop bits. Your screen keeps displaying random garbage characters. Your software and modem might not be set to the same flow control settings. The best flow control settings might not be enabled on your modem.
Make sure the software and modem have the same flow control settings (hardware [RTS/CTS] and software [xon/xoff]). In terminal mode, type AT&F1 and press ENTER to load the optimal settings.
Your communicatio ns software is reporting many cyclic redundancy check (CRC) errors and low characters per second (CPS).
You may have a bad phone line. Optimum flow control settings may not be enabled on your modem. The serial port rate in your communications software may be set too high for your modems UART or your areas phone lines. The remote site you are dialing into may have trouble with the file transfer protocol. There may be a Terminate and Stay Resident (TSR) program (such as a screen saver or virus scanner) running in the background, disrupting data communications.
Try placing the call again. The phone company routes calls differently each time. In terminal mode, type AT&F1 and press ENTER to load the optimum hardware flow control settings:. Lower the serial port rate in your communications software to 57,600 bps, 38,400 bps, or 19,200 bps. NOTE: The port rate for an x2 modem cannot be set lower than 57,600.
Try using a different file transfer protocol. Do not use Xmodem if other protocols are available. Zmodem is the preferred protocol. Disable any Terminate and Stay Resident (TSR) programs running in the background. If you have software running as a TSR, check the softwares manual for information about disabling its ability to operate as a TSR.
Your communications software is reporting many cyclic redundancy check (CRC) errors and low characters per second (CPS) (cont.). Errors are constantly occurring in your V.17 fax transmissions. RapidComm fails to initialize the modem.
You may be trying to download a file to a compressed area of your hard disk.
Download to an uncompressed area on your hard drive.
Your modem initialization string could be insufficient for fax transmissions. There may be a Terminate and Stay Resident (TSR) program (such as a screen saver or virus scanner) running in the background, disrupting data communications. Your baud rate may be set too high. You may be trying to fax a compressed file RapidComms port settings may be incorrect.
In terminal mode, type AT&H3&I2&R2S7=90 and press ENTER. This is an initialization string. The standard string for faxing is AT&F1S36=0. Disable any Terminate and Stay Resident (TSR) programs running in the background. If you have software running as a TSR, check the softwares manual for information about disabling its ability to operate as a TSR.

Lower baud rate to 9600, 7200, or 4800. Open the file in the application in which it was created. Select RapidComm as the printer and then print the file. Make sure RapidComms port settings are correctly set for your modem.

Online Help Resources

Connecting to the U.S. Robotics BBS To connect to the U.S. Robotics Bulletin Board System, follow these steps: 1. Start RapidComm. The software settings for the BBS are: ANSI terminal emulation Data Bits: 8 Parity: None Stop Bits: 1 2. Put RapidComm in Terminal mode by clicking on the Terminal button (see the following screen image).
3. Type ATDS0 and press ENTER.
NOTE: ATDS0 automatically dials
1-847-982-5092, the U.S. Robotics BBS. If this is your first time connecting to our BBS, you will be asked to enter your name,
create a password of your choice, and to fill out a questionnaire.
contains hundreds of helpful files and tips to help simplify using your modem. Downloading the Technical Reference Guide To download the Technical Reference Guide, follow these steps: 1. In the main menu, type D for Download a file.
The preceding screen shot is what the introduction screen of the U.S. Robotics BBS will look like. The BBS gives you access to customer and technical support documents and the BBS library. The library (This is what the main menu will look like.) 108
2. A Filename to Download: text box appears on the screen.
PKUNZIP.EXE is also available on the BBS. x2_HELP.ZIPThe Guide in a zipped Windows Help format. x2_ASCI.TXTThe Guide in an uncompressed ASCII format. 4. Protocol Type for Transfer. Your selection depends on what your software supports. If possible, make Zmodem your first choice. Xmodem should be your last choice since it is very slow. 5. Depending on the software you are using, you will either be prompted where you want the file placed, or the file will be placed in the directory where your communications software is loaded. 6. When the file transfer is complete, and you are ready to leave the BBS, type G (for Good-bye) from the main menu. 109
3. Type the name of the file you wish to receive. You have three manual formats from which to choose: x2_WORD.ZIPThe Guide in a zipped Word for Windows v6.0 format. You will need PKUNZIP.EXE to uncompress this file.
U.S. Robotics offers a number of other online technical support options. Choose any one of the following options if you need help with or want to learn more about your new modem. Internet FTP Provides free library containing the same files as the BBS site. FTP to ftp.usr.com. Internet on Demand 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 support@usr.com. To have a document e-mailed to you, send the document's number as the subject.

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 Mode used by a modem when sending and receiving data files. DCE Data Communications (or CircuitTerminating) Equipment, such as dial-up 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. The computer or software will use these settings until changed by the user or other 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 118
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. 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.
Electronic Industries Association (EIA) Group 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 used by a modem to send and receive data in facsimile format. See definitions for V.17, V.27ter, V.29.

includes an automatic link negotiation fallback to 1200 bps and compatibility with Bell 212A/V.22 modems. V.27 ter An ITU-T standard for facsimile operations that specifies modulation at 4800 bps, with fallback to 2400 bps. V.29 An ITU-T standard for facsimile operations that specifies modulation at 9600 bps, with fallback to 7200 bps. V.32 An 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 An ITU-T standard that extends the V.32 connection range: 4800, 7200, 9600, 12,000, and 14,400 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 (see online fall back/fall forward). V.34 An ITU-T standard that currently allows data rates as high as 28,800 bps. V.34+ An enhancement to V.34 that enables data transfer rates as high as 33,600 bps.
V.42 An 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.
TECHNICAL QUICK REFERENCE
This section includes information about:
Front Panel Lights Command Summary DIP Switches S-Registers The Serial Interface (cable information)

U.S./ITU-T answer sequence. B0 B1 ITU-T answer sequence U.S. answer tone
Dials the specified phone number. Includes the following: L P R Dials the last dialed number. Pulse (rotary) dial Originates call using answer (reverse) frequencies. Dials the phone number string stored in NVRAM at position n (n = 03). Phone

Any key

numbers are stored with the &Zn=s command. Tone dial (Comma) Pause, See S8 definition; which its linked to. (Semicolon) Return to Command mode after dialing. Dials the letters that follow (in an alphabetical phone number). (Exclamation point) Flashes the switch hook. Delays for 125 ms. before proceeding with dial string.
Wait for second dial tone (X2 or X4); linked to S6 register. Dials, waits for quiet answer, and continues (X3 or higher). Displays a list of Dial commands.
Sets local echo. E0 Echo OFF E1 Modem displays keyboard commands 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. Local echo OFF. Receiving system may send a remote echo of data it receives.

I2 I3 I4 I5 I6 I7 Ln

Controls ON/OFF hook. H0 Hangs up (goes on hook). H1 Goes off hook. Displays the following information. I0 Four-digit product code I1 Results of ROM checksum
Results of RAM checksum Product type Current modem settings Nonvolatile memory (NVRAM) settings Link diagnostics Product configuration
Controls speaker volume (internals only). L0 Low volume L1 Low volume L2 Medium volume L3 High volume Operates speaker. M0 Speaker always OFF.

M1 M2 M3 On

Speaker ON until CONNECT. Speaker always ON. Speaker ON after dial, until CONNECT.
Displays result codes only in Originate mode.
Sr.b=n Sets bit.b of register r to n (0/OFF or 1/ON). Sr=n Sets register r to n. Sr? S$ T Displays contents of SRegister r. Displays a list of the SRegisters. Sets tone dial. Displays verbal/numeric result codes. V0 Numeric codes V1 Verbal codes 133
Returns online. O0 Returns online. O1 Returns online and retrains. Sets pulse dial (for phone lines that dont support touch-tone dialing). Displays/suppresses result codes. Q0 Displays result codes. Q1 Quiet mode; no result codes.

&U28 &U29 &U30 &U31
53,333 bps 54,666 bps 56,000 bps 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 doesnt send break &Y1 Destructive, expedited &Y2 Nondestructive, expedited &Y3 Nondestructive, unexpedited

&Zn?

Displays the phone number stored at position n (n = 0 3). Displays the last executed dial string.

&ZL?

&Zn=s Writes phone number string s to NVRAM at position n (n = 03). &Zn=L Writes last executed dial string to NVRAM at position n (n = 03).
#CID=n Controls Caller ID feature. #CID=0 Caller ID disabled. #CID=1 Caller ID enabled. #CID=2 Caller ID enabled with extended information, including callers name. +++ Escapes to online-command mode.
DIP Switches (Modems with DIP Switches Only)
Note: If a DIP switch is on, it is down. If a DIP switch is off, it is up. Defaults are in italics.

Switch

Factory Setting Function
OFF Data Terminal Ready (DTR) Override OFF Normal DTR operations: computer must provide DTR signal for the modem to accept commands; dropping DTR terminates a call ON Modem ignores DTR (Override) Verbal/Numeric Result Codes OFF Verbal (word) results ON Numeric results Result Code Display OFF Suppresses result codes ON Enables result codes Command Mode Local Echo Suppression OFF Displays keyboard commands ON Suppresses echo Auto Answer Suppression OFF Modem answers on first ring, or higher if specified in NVRAM
ON Disables auto answer Switch
OFF Carrier Detect (CD) Override OFF Modem sends CD signal when it connects with another modem, drops CD on disconnect ON CD always ON (Override) Power-on and ATZ Reset Software Defaults OFF Loads Y or Y1 configuration from user-defined nonvolatile memory (NVRAM) ON Loads &F0Generic template from read only memory (ROM) AT Command Set Recognition OFF Disables command recognition (Dumb Mode) ON Enables recognition (Smart mode)

S-Registers

To change a setting, use the ATSr=n command, where r is the register and n is a decimal value from (unless otherwise indicated). Register Default

S0 S1 S2 S3 S4 S8

Function
Sets the number of rings on which to answer in Auto Answer Mode. When set to 0, Auto Answer is disabled. Counts and stores the number of rings from an incoming call. (S0 must be greater than 0.) Stores the ASCII decimal code for the escape code character. Default character is +. A value of disables the escape code. Stores the ASCII code for the Carriage Return character. Valid range is 127. 0
Stores the ASCII decimal code for the Line Feed character. Valid range is 0 127. Stores the ASCII decimal code for the Backspace character. A value of 255 disables the Backspace keys delete function. 128

Register

S6 S7 S8 S9 S10

Default

Sets the number of seconds the modem waits before dialing. If Xn is set to X2 or X4, this is the time-out length if there isn't a dial tone. Sets the number of seconds the modem waits for a carrier. May be set for much longer duration if, for example, the modem is originating an international connection. Sets the duration, in seconds, for the pause (,) option in the Dial command. Sets the required duration, in tenths of a second, of the remote modems carrier signal before recognition by the Sportster modem. Sets the duration, in tenths of a second, that the modem waits to hang up after loss of carrier. This guard time allows the modem to distinguish between a line disturbance from a true disconnect (hang up) by the remote modem. While we dont 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.

Register Default

S10 (cont.)
A better alternative is to ask your phone company how to temporarily disable call waiting (usually *70W). For example: ATDT *70W 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 S12 S13

Sets the duration and spacing, in milliseconds, for tone dialing. Sets the duration, in fiftieths of a second, of the guard time for the escape code sequence (+++). 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 Reset when DTR drops. Reset non-MNP transmit buffer from 1.5K to 128 bytes.* Set backspace key to delete. On DTR signal, auto dial the number stored in NVRAM at position 0.

S13 (cont.)

Bit Value Result At power on/reset, Auto Dial the number stored in NVRAM at position 0. Reserved Disable quick retrains. Disconnect on escape code.
* The 1.5K-byte non-ARQ buffer allows data transfer with Xmodem- and Ymodem-type file transfer

Sportster Flash x2 - Users 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.)
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. Whats 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.

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.

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.
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.
Hardware Installation Steps 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. Plug the power adaptor into the power socket and into a standard wall outlet. 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.
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.

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

Disable x2 Enable x2 (default)

Use this command

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 Highest possible connect speed Lowest possible connect speed Range of possible connect speeds Use &N &U &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 Highest possible connect speed Use this command AT&N=x Where x is A value from 0 to 31
Note: See table 12.4 for a list of connect speed values.
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 Lowest possible connect speed Use this command AT&U=x Where x is A value from 0 to 31

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.

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) 24 Fax: +33 (0) 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 cant 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) 24 Fax: +33 (0) 34 USR BBS: +33 (0) 08 CompuServe: GO USROBOTICS Internet: eurosupport@usr.com

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) 97 Fax : +33 (0) 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 N2 F-59818 Lesquin Cedex France

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 /.
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.

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.
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.

Quick Reference

Introduction The Quick Reference appendix includes information about the following: Front Panel Lights Command Summary S-Registers

Front Panel Lights

Symbol AA Meaning Auto Answer/ Answer Status Answer mode: ON when 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. 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). Flashes when modem sends result codes or passes received data bits. Flashes when computer sends a data bit. ON if modem receives a DTR Ready signal from computer. Always ON (modem ignores DTR) if the DTR override is ON (&D0). ON until modem lowers CTS when Transmit Data hardware flow control is enabled (&H1, &H3). Data Mode: Automatic Repeat Request. 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. ON when modem accesses the phone line. OFF when modem is On Hook.

Carrier Detect

RD SD TR
Received Data Send Data Data Terminal

Clear to Send

ARQ/ FAX
Error Control/ Fax Operations

Off Hook

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 dont 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 doesnt count the AT prefix, carriage returns, or spaces.
Note: Defaults are marked with an asterisk (*).

Command Set

$ A Displays a basic command list; on-line help. Manual Answer: goes off hook in answer mode. Pressing any key aborts the operations. Re-executes the last issued command. Used mainly to redial. This does not require the AT prefix or a Carriage Return. Aborts off-hook dial/answer operation and hangs up. Required command prefix, except with A/ and +++. Use alone to test for OK result code. U.S./ITU-T answer sequence. B0 ITU-T V.25 answer sequence B1 U.S. answer tone

Any key

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 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$ En * Fn Displays a list of Dial commands. Sets local echo. E0 Echo OFF E1 Modem displays keyboard commands 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.
Controls ON/OFF hook. H0 Hangs up (goes on hook) H1 Goes off hook 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 Controls speaker volume. L0 Lowest L1 Low L2 Medium L3 High Operates speaker. M0 Speaker always OFF M1 Speaker ON until CONNECT M2 Speaker always ON M3 Speaker ON after dial, until CONNECT Returns online. O0 Returns online O1 Returns online and retrains Sets pulse dial (for phone lines that dont support touch-tone dialling).

&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
&Nn Sets connect speed. If connection cannot be established at this speed, the modem will hang up. * &N0 Variable rate &Nbps &Nbps &Nbps &Nbps &Nbps &Nbps &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.

&U=0

&N=0 Connects at best possible speed between your modem and remote modem Connects at any speed faster than the value of &U.
&N>0 Connects at speed defined by &N

&U>0

Connects at any speed between &N and &U.
&Rn Sets Receive Data (RD) hardware flow control, Request to Send (RTS) (see also &In and &Hn). &R0 Reserved &R1 Modem ignores RTS * &R2 Received Data to computer only on RTS &Sn Controls Data Set Ready (DSR) operations. * &S0 DSR override; always ON &S1 Modem controls DSR &Tn Begins test modes. &T0 Ends testing &T1 Initiates Analogue Loopback &T2 Reserved &T3 Initiates Local Digital Loopback &T4 Enables Remote Digital Loopback * &T5 Prohibits 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 &Un Sets floor connect speed when &Un is set greater than 0. &Nn is the ceiling connect speed. See &Nn. * &U0 Disabled &Ubps &Ubps &Ubps &Ubps &Ubps &Ubps Sportster Flash x2 - Users Guide 53
&U7 &U8 &U9 &U10 &U11 &U12 &U13 &U14 &U15 &U16 &U17 &U18 &U19 &U20 &U21 &U22 &U23 &U24 &U25 &U26 &U27 &U28 &U29 &U30 &U31
12,000 bps 14,400 bps 16,800 bps 19,200 bps 21,600 bps 24,000 bps 26,400 bps 28,800 bps 31,200 bps 33,600 bps 33,333 bps 37,333 bps 41,333 bps 42,666 bps 44,000 bps 45,333 bps 46,666 bps 48,000 bps 49,333 bps 50,666 bps 52,000 bps 53,333 bps 54,666 bps 56,000 bps 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 doesnt 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). Writes last executed dial string to NVRAM at position n (n = 0*3). Displays the phone number stored at position Sportster Flash x2 - Users Guide

&Zn=L

&Zn? 54
n (n = 0*3). <Ctrl>C <Ctrl>K <Ctrl>S +++ Cancels the display of the help screens. Cancels the display of the help screens. Pauses help screens. Escapes to online-command mode.

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 SFunction Sets the number of rings on which to answer in Auto Answer Mode. When set to 0, Auto Answer is disabled. Counts and stores the number of rings from an incoming call (read only). Stores the ASCII decimal code for the escape code character. Default character is "+." Stores the ASCII code for the Carriage Return character <CR>. Stores the ASCII decimal code for the Line Feed character <LF>. Stores the ASCII decimal code for the Backspace character <BS>. Sets the number of seconds the modem waits for dial tone before dialling. Sets the number of seconds the modem waits for a carrier or answers before returning on-hook and sending a No Carrier result code. Sets the duration, in seconds, for the pause (,) option in the Dial command. Sets the required duration, in tenths of a second, of the remote modems carrier signal before recognition by your modem.

Register Default S10 7

Function 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 dont 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.

Sets the duration and spacing, in milliseconds, for tone dialling. Sets the duration, in fiftieths of a second, of the guard time for the escape code sequence.

Register Default S13 0

Function 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 Reset when DTR drops. Reset non-MNP transmit buffer from 1.5K to 128 bytes.* Set backspace key to delete. On DTR signal, auto dial the number stored in NVRAM at position 0. At power on/reset, Auto Dial the number stored in NVRAM at position 0. Reserved. Reserved. 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 youre 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 modems buffer doesnt exceed the size of their screen. This is also very helpful in situations when a remote modem/printer application is losing characters.

Register Default S14 S0

Function Reserved. Bit-mapped register setup. To set the register, see instructions for S13. Bit Value Result Disable ARQ/MNP for V.22. Disable ARQ/MNP for V.22 bis. Disable ARQ/MNP for V.32/V.32bis. Disable MNP handshake. Disable MNP level 4. Disable MNP level 3. MNP incompatibility. Disable V.42 operation.
Bit-mapped register setup. To set the register, see instructions for S13. Bit 2-7 Value 4-128 Result Reserved. Touch tone dialling test. Reserved.

S17 S18

Reserved. 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.

Register Default S19 0

Function 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. Reserved. Sets the length, in 10-millisecond units, of breaks sent from the modem to the computer; applies to MNP or V.42 mode only. Stores the ASCII decimal code for the XON character. Stores the ASCII decimal code for the XOFF character. Reserved. Sets the duration, in hundredths of a second, that DTR must be dropped so that the modem doesnt 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.) Reserved.

S20 S21

S24 S25

Register Default S27 1

Function Bit-mapped register setup. To set the register, see instructions for S13. Bit 0 Value 1 Result 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) Enables unencoded (nontrellis coded) modulation in V.32 mode; rarely used part of ITU-T Recommendation V.32. Disables V.32 modulation. Disables 2100 Hz answer tone to allow two V.42 modems to connect more quickly. Enables V.23 fallback mode. Disables V.32 bis mode. Reserved. 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.

64 128

Register Default S8 255
Function Eliminates the V.32 answer tones for a faster connection. Default item, all times are in tenths of seconds. Disables all connections except V.32 at 9600 bps. Sets the duration, in tenths of a second, of the V.21 answer mode fallback timer. Reserved. Volume control for speakerphone. Bit mapped register setup. To set the register, see the instructions for S13. Bit Value Result V.8 Call Indicate enabled. Enables V.8 mode. Disable V.FC modulation. Disable V.34 modulation. Disable 33.6 kbps support. Reserved. Reserved. Reserved.

S30 S31 S32

Bit mapped register setup. To set the register, see the instructions for S13. Bit Value Result Disable 2400 symbol rate. Disable 2743 symbol rate. Disable 2800 symbol rate. Disable 3000 symbol rate. Disable 3200 symbol rate. Disable 3429 rate. Reserved. Disable shaping.

Register Default

Function
Bit mapped register setup. To set registers, see instructions for S13. Bit Value Result Disable 8S-2D trellis encoding. Disable 16S-4D trellis encoding. Disable 32S-2D trellis encoding. Disable 64S-4D trellis encoding. Disable non-linear coding. Disable TX level deviation. Disable Pre-emphasis. Disable Pre-coding.

S35-S37 S38 0

Reserved. 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 Specifications
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 Compatibility

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.

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.