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3Com 005699-00 Manual

Faxmodems
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Download this manual See also: Installation Manual
®
This manual covers 3Com U.S. Robotics
faxmodems.
3Com, the 3Com logo, U.S. Robotics, and Winmodem are registered trademarks and Connections, RapidComm,
MacComCenter, and x2 are trademarks of 3Com Corporation. Windows is a registered trademark of Microsoft
Corp. Macintosh is a registered trademark and Mac is a trademark of Apple Computer, Inc. CompuServe is a
registered trademark of CompuServe Inc. America Online is a registered trademark of America Online Inc. Any
other trademarks, trade names, or service marks used in this manual are the property of their respective owners.
Copyright © 1998 3Com Corporation. All rights reserved.
3800 Golf Rd.
Rolling Meadows, IL 60008
* IMPORTANT! In accordance with the ITU-T standard for 56K transmissions (V.90), U.S. Robotics 56 Kbps
modems are capable of 56 Kbps downloads. However, due to FCC rules which restrict power output of service
providers, current download speeds are limited to 53 Kbps. Actual speeds may vary due to line conditions and
other factors. Uploads from users to server equipment travel at speeds up to 31.2 Kbps. An analog phone line
compatible with the V.90 standard or x2 technology and an Internet provider or corporate host site compatible
with the V.90 standard or x2 technology are necessary for these high-speed downloads. See www.3Com.com/56k
for details.

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  • Page 1 ® This manual covers 3Com U.S. Robotics faxmodems. 3Com, the 3Com logo, U.S. Robotics, and Winmodem are registered trademarks and Connections, RapidComm, MacComCenter, and x2 are trademarks of 3Com Corporation. Windows is a registered trademark of Microsoft Corp. Macintosh is a registered trademark and Mac is a trademark of Apple Computer, Inc. CompuServe is a registered trademark of CompuServe Inc.

  • Page 3: Table Of Contents

    ABLE OF ONTENTS 56K Faxmodem Product Features ....................1-1 Software Installation ......................... 2-1 Windows-based systems........................2-1 Macintosh computers ........................2-3 Speakerphone Features (External Voice Speakerphone Modems Only) ......... 3-1 Modem Update Wizard ........................4-1 Windows-based systems........................4-1 Macintosh computers ........................4-3 Uninstalling a U.S. Robotics Modem ..................5-1 Uninstalling a Winmodem Faxmodem ....................5-1 Uninstalling an Internal Faxmodem....................5-3 Uninstalling an External Faxmodem....................5-4...
  • Page 4 56K F AXMODEM RODUCT EATURES Modulation Schemes Fax Modulation Schemes V.34+ Link Rates ITU-T V.90 ITU-T V.17 4800, 7200, 9600, 12000, x2™ technology ITU-T V.29 14400, 16800, 19200, 21600, ITU-T V.34+ ITU-T V.27ter 24000, 26400, 28800, 31200, ITU-T V.34 ITU-T V.21 33600 ITU-T V.32bis Fax Standards...

  • Page 5: Software Installation

    OFTWARE NSTALLATION If you have disabled AutoPlay, click Windows-based Systems: Start, point to Programs, point to 3Com U.S. Robotics, and click Running the Setup Wizard Connections. The instructions for installing your ™ Installing the RapidComm ™ Connections CD-ROM software are on Software the installation map included in your modem’s box.
  • Page 6 OFTWARE NSTALLATION The Connections CD contains the RapidComm communications software. RapidComm is used with the standard...
  • Page 7 OFTWARE NSTALLATION 5. Follow the on-screen instructions to modems; RapidComm Voice is used with finish the installation. modems with voice functionality. Once you have installed the Connections program group, you can install the NOTE: The CD also contains an RapidComm software. (The Setup Wizard electronic user manual for RapidComm does not install RapidComm.) and RapidComm Voice.

  • Page 8: Macintosh Computers

    OFTWARE NSTALLATION Double-click the Connections icon in Macintosh Computers: the Connections folder. Running the Setup Wizard ™ Installing the RapidComm Software The instructions for installing your ™ Connections CD-ROM software are on the installation map included in your NOTE: If you have a version of modem’s box.
  • Page 9 OFTWARE NSTALLATION 5. Click Install Software. modems; RapidComm Voice is used with 6. Follow the on-screen instructions to modems with voice functionality. finish the installation. Once you have installed Connections, you can install the RapidComm software. (The Setup Wizard does not install RapidComm.) NOTE: The CD also contains an Follow these instructions to install...
  • Page 10 PEAKERPHONE EATURES XTERNAL OICE PEAKERPHONE ODEMS Making a Speakerphone Call Making a Speakerphone Call with a Telephone with Communications Software 1. Make sure your telephone is plugged into the modem’s PHONE jack. 1. Dial the telephone number using your 2. Lift the telephone’s handset. communications software.

  • Page 11: Speakerphone Features (External Voice Speakerphone Modems Only)

    PEAKERPHONE EATURES XTERNAL OICE PEAKERPHONE ODEMS connected to the modem’s PHONE jack. To PHONE jack. If you are using your use the speaker again, press the SPEAKER communications software to dial button and then hang up the handset. speakerphone calls, the software needs to be running in order for you to hear incoming Adjusting Speaker Volume calls.)

  • Page 12: Modem Update Wizard

    ODEM PDATE IZARD Installing the Wizard Windows-based Systems: 1. Insert the Connections CD into your The Connections CD-ROM, which came with CD-ROM drive. your modem, includes the U.S. Robotics Modem Update Wizard. This software is 2. The Connections interface will appear designed to quickly update your modem to the automatically in your Web browser.

  • Page 13: Updating Your Modem

    ODEM PDATE IZARD NOTE: For more detailed instructions, see our Web page (http://www.3Com.com/56k). Updating Your Modem 1. Click Start, point to Programs, and then point to U.S. Robotics Modem Update Wizard. Finally, click the Modem Update Wizard selection. 2. Follow the on-screen instructions to complete the update process.

  • Page 14: Macintosh Computers

    ODEM PDATE IZARD Installing the Wizard Macintosh Computers: 9. Insert the Connections CD into your The Connections CD-ROM, which came with CD-ROM drive. your modem, includes the U.S. Robotics Modem Update Wizard. This software is 10. The Connections interface will appear designed to quickly update your modem to the automatically in your Web browser.
  • Page 15 ODEM PDATE IZARD NOTE: For more detailed instructions, see our Web page (http://www.3Com.com/56k). Updating Your Modem 1. Double-click your Hard Drive icon. 2. Double-click the Modem Update Wizard folder. 3. Double-click the Update Wizard icon. 4. Follow the on-screen instructions to complete the update process.

  • Page 16: Uninstalling A Winmodem Faxmodem

    U.S. R NINSTALLING A OBOTICS ODEM Uninstalling a Winmodem NOTE: These instructions only apply to U.S. Robotics modems. If the CAUTION : To avoid the risk of modem you’ll be uninstalling was made electric shock, make sure your by another manufacturer, refer to that computer and all peripheral devices are modem’s documentation for uninstall turned off and unplugged.
  • Page 17 U.S. R NINSTALLING A OBOTICS ODEM 7. Choose the Port Settings tab and then CAUTION : To avoid the risk of click the Uninstall button. electric shock, make sure your 8. Windows displays the following computer and all peripheral devices are message: “Warning, you are about to turned off and unplugged.

  • Page 18: Uninstalling An Internal Faxmodem

    U.S. R NINSTALLING A OBOTICS ODEM 14. Remove the computer’s cover. (If you 2. Double-click the Modems icon. do not know how, refer to your 3. Click to highlight the name of the computer’s documentation.) modem you wish to remove. 15.

  • Page 19: Uninstalling An External Faxmodem

    U.S. R NINSTALLING A OBOTICS ODEM 7. Turn off and unplug your computer and Start menu, point to Settings and then all peripherals. click Control Panel. 8. Remove the computer’s cover. (If you 2. Double-click the System icon. do not know how, refer to the 3.

  • Page 20: Uninstalling A Faxmodem For Macintosh

    U.S. R NINSTALLING A OBOTICS ODEM back of your computer marked with a CAUTION : To avoid the risk of telephone icon electric shock, make sure your computer and all peripheral devices are turned off and unplugged. 10. Unplug the modem’s power adapter from the outlet or power strip.
  • Page 21 U.S. R NINSTALLING A OBOTICS ODEM Once your modem is disconnected, you’ll need to uninstall the RapidComm software. For more information on uninstalling the communications software included with your modem, see the RapidComm manual on your Connections CD.

  • Page 22: Troubleshooting And Help Resources

    ROUBLESHOOTING AND ESOURCES When you try to connect to the Internet, you get the error “modem not responding” or “modem in use.” Possible Solutions: If you have an external modem, make sure that power supply is plugged into the modem and into the electrical outlet, and make sure that the modem has been turned on.
  • Page 23 ROUBLESHOOTING AND ESOURCES You might have a bad phone cord connection to your modem. The phone cord should be plugged into the TELCO jack on the modem and the wall phone jack. The phone cord should be no longer than 12 feet in length. Use the phone cord included in your 3Com box, if possible.
  • Page 24 ROUBLESHOOTING AND ESOURCES ATX3DT18475454248 (the 3Com Macintosh BBS) and press ENTER. If you need to dial 9 to obtain outside phone access, insert a 9 in the above phone number immediately before the 1. This string bypasses the dial tone, allowing a connection if the modem is functioning properly.
  • Page 25 ROUBLESHOOTING AND ESOURCES b. Make sure that the number you’re dialing is an actual V.90 server. Some ISPs may have a mixture of V.90 and non-V.90 servers. You can check this by contacting your ISP and asking them about 56K technology or V.90 availability. c.
  • Page 26 ROUBLESHOOTING AND ESOURCES Possible Solutions: You may have plugged your modem’s phone cord into the wrong jack on the modem. Make sure the phone cord is plugged into a jack labeled with the word TELCO or a wall plug icon. You may have devices between the modem and the phone jack.
  • Page 27 ROUBLESHOOTING AND ESOURCES Windows 95 has built-in dial-up network support. Using Dial-Up Networking, you are able to connect to remote servers and Internet providers. Through some easy steps, you can connect to your local Internet provider or Remote Access Service (RAS). The first step in setting up Dial-Up Networking is to make sure the service is installed.
  • Page 28 ROUBLESHOOTING AND ESOURCES Close all your applications and restart the system. You are now finished with the installation process. Configuring Dial-Up Networking You first need to add the Dial-Up Adapter. In most cases this will be added automatically. To verify that the Dial-Up Adapter is installed, right-click the Network Neighborhood icon, then click Properties.
  • Page 29 ROUBLESHOOTING AND ESOURCES requires it. Make sure that Wait for dial tone before dialing is checked to make sure there is no dialing before the line has been picked up. Once you are done with this, click OK, then Next as stated above. Now you will need to add the number of your Service Provider.
  • Page 30 ROUBLESHOOTING AND ESOURCES IP Setting – Possible Scenarios Your access provider provides you with a specific IP address that you will use every time. If this is the case, make sure that Specify an IP address is checked. Now you must fill in the IP address field with the information your access provider gave you.
  • Page 31 ROUBLESHOOTING AND ESOURCES Using Dial-Up Networking Now that everything is configured, it’s time to dial out. Click Start, point to Programs, and click Accessories. Click Dial-Up Networking and double-click the new icon you created under Dial-Up Networking. You should see the Connect To screen. Fill in your user name and password and click Connect or press ENTER.
  • Page 32 ROUBLESHOOTING AND ESOURCES Plug and Play does not detect your modem. You’ve installed the modem and Windows has restarted, but you simply see your desktop. You do not see any screens indicating that new hardware has been detected. Possible Solutions: The Plug and Play installation was not successful.
  • Page 33 ROUBLESHOOTING AND ESOURCES support options. If you do see one of these options, double-click the option. If the description that appears matches the modem you are trying to install, click the Remove button. Click OK when Windows asks if you wish to remove the device. Next, restart the computer and continue with instructions on the installation map included with your modem.
  • Page 34 ROUBLESHOOTING AND ESOURCES IRQ Assignment 0 System Timer 1 Keyboard 2 Cascade input (mandatory function) 3 COM2 4 COM1 5 Sound/Parallel Port 2 (LPT2) 6 Disk Controller (All internal floppy drives) 7 Parallel Port 1 (LPT1) 8 Real-time clock interrupt 9 Reserved 10 Reserved 11 Reserved...
  • Page 35 ROUBLESHOOTING AND ESOURCES its default assignment. This is possible only if the default assignment is not in use. For example, you can assign COM3 to IRQ5, if you are not using LPT2 for a second printer, sound card, or other external parallel device. You cannot assign COM4 to IRQ2 because IRQ2 is being used by the computer for a mandatory function.
  • Page 36 ROUBLESHOOTING AND ESOURCES Use the mouse to select the COM port that you are using for your modem. Click Settings, then Advanced. Select the IRQ you want to use for your modem. Be sure to select the appropriate COM port in your communications software. Consult your software’s documentation for information on how to make these changes.
  • Page 37 ROUBLESHOOTING AND ESOURCES cards is that many of them share COM4’s memory address space. This can conflict if you try putting a modem on COM4. Please contact your graphic card company for support on this issue. You need to determine which COM port and IRQ each serial interface card in your system is using.
  • Page 38 ROUBLESHOOTING AND ESOURCES Sometimes it is necessary to change the IRQ setting on an expansion card to free an IRQ for the modem. For example, if your sound card is using IRQ5, you can reinstall it using IRQ11. This would then free IRQ5 for use by your modem. If you continue to have conflicts, or do not know how to disable the on-board COM ports or other settings, you should contact your computer manufacturer or software manufacturer.

  • Page 39: Help Resources

    ROUBLESHOOTING AND ESOURCES Help Resources NOTE: ATDS (the last digit is a Connecting to the 3Com BBS zero) automatically dials 1 847 262 To connect to the 3Com Bulletin Board 6000, the 3Com BBS. System, follow these steps: If this is your first time connecting to our 1.
  • Page 40 ROUBLESHOOTING AND ESOURCES World Wide Web 3Com offers a number of other online technical support options. Choose any one A 3Com Web page containing the same of the following options for help with, information as the Internet on Demand and/or more information about, your new listing.

  • Page 41: Are You Still Having Problems

    ROUBLESHOOTING AND ESOURCES Are You Still Having Problems? NOTE: If you can, have your ati7 Review this manual. information written down on a piece of Call or visit your modem dealer. They paper before you call tech support. may be able to provide immediate Regular Phone Service assistance.
  • Page 42 ROUBLESHOOTING AND ESOURCES For a no-hold call, a $2.00 per minute Include your SRO number, name, and charge will appear on your local phone address on the shipping label as well as bill. You must be 18 or older or have inside the package.
  • Page 43 LOSSARY Cross references are printed in boldface. Automatic Repeat reQuest. A function that allows analog loopback be retransmitted. See MNP V.42. or an internal test pattern is sent to the modem's ASCII transmitter, turned into analog form, looped back to American Standard Code for Information Interchange.
  • Page 44 LOSSARY auto-dial bits per second (bps) A process where your modem dials a call for you. The bits (binary digits) per second rate. Thousands The dialing process is initiated by sending an of bits per second are expressed as kilobits per ATDT (dial tone) or ATDP (dial pulse) command second (kbps).
  • Page 45 LOSSARY characters per second (cps) data communications The transmission or sharing of data between A data transfer rate generally estimated from the bit rate and the character length. For example, at computers via an electronic medium. 2400 bps, 8-bit characters with start/stop bits (for a data compression table total of ten bits per character) will be transmitted at A table containing values assigned for each...
  • Page 46 LOSSARY detect phase duplex Indicates a communications channel capable of In the ITU-T V.42 error-control protocol, the first stage in establishing if both modems attempting to carrying signals in both directions. See half duplex, connect have V.42 capability. full duplex. dictionary Electronic Industries Association (EIA) The term used for compression codes built by the...
  • Page 47 LOSSARY flow control A mechanism that compensates for differences in Hertz, a frequency measurement unit used the flow of data into and out of a modem or other internationally to indicate cycles per second. device. See commands &Hn, &In, &Rn. Internet frame An electronic communications network that...
  • Page 48 LOSSARY nonvolatile memory (NVRAM) LAPM User-programmable random access memory whose Link Access Procedure for Modems. An error- data is retained when power is turned off. On the control protocol defined in ITU-T recommendation U.S. Robotics modem, it includes four stored phone V.42.
  • Page 49 LOSSARY checking has been surpassed by more reliable and remote echo A copy of the data received by the remote system, efficient forms of error checking, including V.42 and MNP 2-4 protocols. Either the same type of returned to the sending system, and displayed on the screen.
  • Page 50 LOSSARY terminal mode 1200 bps, compatible with the Bell 212A standard Software mode that allows direct communication observed in the U.S. and Canada. with the modem. Also known as command mode. V.22 bis throughput An ITU-T standard for modem communications at The amount of actual user data transmitted per 2400 bps.
  • Page 51 LOSSARY 14,400 bps. V.32 bis modems fall back to the next telephone network to increase the bit rate of the lower speed when line quality is impaired, fall back receive channel by eliminating the analog to digital further as necessary, and also fall forward (switch conversion commonly found in modem connections.

  • Page 52: Glossary

    LOSSARY 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.

  • Page 53: Technical Reference

    ECHNICAL EFERENCE Front-of-the-Case Lights (External Faxmodems) ....8-2 Top-of-the-Case Lights (Voice Faxmodem Pro Externals) ..8-3 Typing Commands ..............8-4 Basic Data Commands ............8-5 Extended Data Commands ........... 8-12 DIP Switches.................8-20 S-Registers ................8-22 Fax Commands ..............8-33 Screen Messages ..............8-36 The Serial Interface.............. 8-37 Serial Interface Pin Definitions ..........8-38...

  • Page 54: Front-Of-The-Case Lights (External Faxmodems)

    ECHNICAL EFERENCE Front-of-the-Case Lights (External Faxmodems) Symbol Meaning Status AA ..Auto Answer 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. CD...

  • Page 55: Top-Of-The-Case Lights (Voice Faxmodem Pro Externals)

    ECHNICAL EFERENCE Top-of-the-Case Lights (Voice Faxmodem Pro Externals) Light What It Means When Lighted POWER ....The modem is turned on. SEND......The computer is sending a data bit to the modem. RECEIVE....The modem is sending result codes or passing received data bits from the remote. ONLINE....The modem is online.

  • Page 56: Typing Commands

    ECHNICAL EFERENCE Typing Commands 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 stored in the modem buffer.) If a command has numeric options and you don’t include a number, zero is assumed.

  • Page 57: Basic Data Commands

    ECHNICAL EFERENCE A> Re-executes the last issued Basic Data Commands command continuously, until <control key>S the user intervenes or the Stop or restart help screens. command is executed forever. Does not require the <control key>C or <control key>K AT prefix or a Carriage Stop help screens.
  • Page 58 ECHNICAL EFERENCE Dials the specified phone (Semicolon) Return to number. Includes the Command mode after dialing. following: “ Dials the letters that follow Numeric digits (in an alphabetical phone #, * Extended touch-tone number). pad tones (Exclamation point) Flashes Dials the last dialed number. the switch hook.
  • Page 59 ECHNICAL EFERENCE Sets local echo. Displays the following information. Echo OFF Modem displays Four-digit product code keyboard commands Results of ROM checksum Results of RAM checksum Sets online local echo of Product type transmitted data ON/OFF. Current modem settings Local echo ON. Nonvolatile memory Modem sends a copy (NVRAM) settings...
  • Page 60 ECHNICAL EFERENCE Operates speaker. Quiet mode; no result codes. Speaker always OFF. Displays result codes Speaker ON until only in Originate CONNECT. mode. Speaker always ON. Speaker ON after Sr.b=n Sets bit .b of register r to n dial, until (0/OFF or 1/ON).
  • Page 61 ECHNICAL EFERENCE Sets result code displayed. Default is X4. (NOTE: Result codes 0 through 155 are for 33.6 products and V.90 products. Result codes above 155 apply only to V.90 products.) Result Codes 0/OK 1/CONNECT 2/RING 3/NO CARRIER 4/ERROR 5/CONNECT 1200 6/NO DIAL TONE 7/BUSY 8/NO ANSWER*...
  • Page 62 ECHNICAL EFERENCE Result Codes (cont.) 256/CONNECT 28000 260/CONNECT 29333 264/CONNECT 30666 268/CONNECT 32000 180/CONNECT 33333 272/CONNECT 34666 276/CONNECT 36000 184/CONNECT 37333 280/CONNECT 38666 284/CONNECT 40000 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...
  • Page 63 ECHNICAL EFERENCE Selects power-on/reset Resets modem to default configuration. NVRAM profile 1 Resets modem to Use profile 0 setting factory default profile in NVRAM 0 (&F0) Use profile 1 setting Resets modem to in NVRAM factory default profile Use factory 1 (&F1) configuration 0.

  • Page 64: Extended Data Commands

    ECHNICAL EFERENCE &Cn Controls Carrier Detect (CD) Extended Data Commands signal. &$ Displays a list of ampersand (&) &C0 CD override commands. &C1 Normal CD operations &An Enables/disables additional result &Dn Controls Data Terminal Ready code subsets (see Xn). (DTR) operations. &A0 ARQ result codes disabled &D0 DTR override &A1 ARQ result codes enabled...
  • Page 65 ECHNICAL EFERENCE &Gn Sets Guard Tone. &In Sets Receive Data (RD) software flow control (see also &Rn). &G0 No guard tone, U.S. and Canada &I0 Software flow control &G1 550 Hz guard tone, some disabled European countries, requires &I1 XON/XOFF signals to your B0 setting.
  • Page 66 ECHNICAL EFERENCE &Mn Sets Error Control (ARQ) &N0 Connection speed is for connections at 1200 bps determined by the remote modem. and higher. &N1 300 bps &M0 Normal mode, error control &N2 1200 bps disabled &N3 2400 bps &M1 Reserved &N4 4800 bps &M2 Reserved &N5 7200 bps...
  • Page 67 ECHNICAL EFERENCE &N19 30,666 bps &Pn Sets pulse (rotary) dial &N20 32,000 bps make/break ratio. &N21 33,333 bps &P0 U.S./Canada ratio, &N22 34,666 bps 39%/61% &N23 36,000 bps &P1 U.K. ratio, 33%/67% &N24 37,333 bps &Rn Sets Receive Data (RD) hardware &N25 38,666 bps flow control, Request to Send &N26 40,000 bps...
  • Page 68 ECHNICAL EFERENCE &Tn Begins test modes. &Un When set above 0, the value chosen from the table sets the &T0 Ends testing floor connect speed (the lowest &T1 Analog Loopback acceptable connect speed). If a &T2 Reserved connection cannot be made at or &T3 Local Digital above this speed, the modem will...
  • Page 69 ECHNICAL EFERENCE &U0 No restrictions on the &U19 30,666 bps minimum speed for the &U20 32,000 bps &U21 33,333 bps connection. &U1 300 bps &U22 34,666 bps &U2 1200 bps &U23 36,000 bps &U3 2400 bps &U24 37,333 bps &U4 4800 bps &U25 38,666 bps &U5 7200 bps &U26 40,000 bps...
  • Page 70 ECHNICAL EFERENCE &Wn Writes current configuration to &Zn? Displays the phone number stored NVRAM templates. at position n (n = 0 3). &W0 Modifies the NVRAM 0 &ZL? Displays the last executed dial template (Y0) string. &W1 Modifies the NVRAM 1 template (Y1) #CID=n Controls Caller ID feature.

  • Page 71: Dip Switches

    ECHNICAL EFERENCE DIP Switches (External Modems with DIP Switches Only) Note: If a DIP switch is on, it is down. If a DIP switch is off, it is up. Factory Switch Setting Function Data Terminal Ready (DTR) Override OFF Normal DTR operations: computer must provide DTR signal for the modem to accept commands;...
  • Page 72 ECHNICAL EFERENCE Factory Switch Setting Function 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 Y0-Y4 configuration from user-defined nonvolatile memory (NVRAM) ON Loads &F0 Generic template from read only memory (ROM) AT Command Set Recognition...

  • Page 73: S-Registers

    ECHNICAL EFERENCE 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 Sets the number of rings on which to answer in Auto Answer mode. When set to 0, Auto Answer is disabled.
  • Page 74 ECHNICAL EFERENCE Register Default Function 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.
  • Page 75 ECHNICAL EFERENCE Register Default 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). Value Result Reset when DTR drops.
  • Page 76 ECHNICAL EFERENCE Register Default Function Reserved Bit-mapped register setup. To set the register, see instructions for S13. Value Result Disable ARQ/MNP for V.22. Disable ARQ/MNP for V.22bis. Disable ARQ/MNP V.32/V.32bis. Disable MNP handshake. Disable MNP level 4. Disable MNP level 3. MNP incompatibility.
  • Page 77 ECHNICAL EFERENCE Register Default Function 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. Sets the duration, in minutes, for the inactivity timer.
  • Page 78 ECHNICAL EFERENCE Register Default Function Bit-mapped register setup. To set the register, see instructions for S13. Value 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).
  • Page 79 ECHNICAL EFERENCE Register Default 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.
  • Page 80 ECHNICAL EFERENCE Register Default Function Bit-mapped register setup. To set the register, see the instructions for S13. Value Result Disable 2400 symbol rate. Disable 2743 symbol rate. Disable 2800 symbol rate. Disable 3000 symbol rate. Disable 3200 symbol rate. Disable 3429 symbol rate. Reserved Disable shaping.
  • Page 81 ECHNICAL EFERENCE Disable Pre-coding. 8-30...
  • Page 82 ECHNICAL EFERENCE Register Default Function S35-S37 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.
  • Page 83 ECHNICAL EFERENCE Reserved 8-32...

  • Page 84: Fax Commands

    ECHNICAL EFERENCE Fax Commands +FCLASS=n Sets the mode of operation. FCLASS=0 Data mode FCLASS=1 Group 3 Facsimile Service Class 1 mode FCLASS=2.0 Group 3 Facsimile Service Class 2.0 mode FCLASS? Displays the current FCLASS mode (see descriptions above). +FCLASS=? Displays the FCLASS mode options (see descriptions above). +FTS=n Stops the fax transmission.
  • Page 85 ECHNICAL EFERENCE +FTM=n Transmits data using the modulation specified by n. (n = 3, 24, 48, 72, 96, 97, 98, 121, 122, 145, or 146) Note: See the “Screen Messages” table at the end of this section for an explanation of messages that appear in response to this command.
  • Page 86 ECHNICAL EFERENCE Note: See the “Screen Messages” table at the end of this section for an explanation of messages that appear in response to this command. 8-35...

  • Page 87: Screen Messages

    ECHNICAL EFERENCE Screen Messages Numeric Text Message Message Description The previous command has been processed successfully. CONNECT The modem has just connected to another modem. RING Reports the receipt of a network altering ring. NO CARRIER No carrier is being received from the modem. ERROR The previous command line has not been recognized or was completed abnormally.

  • Page 88: The Serial Interface

    ECHNICAL EFERENCE The Serial Interface The serial interface is a standard developed by the Electronic Industries Association (EIA). It defines the signals and voltages used when data is exchanged between a computer and a modem or serial printer. The entire standard covers many more functions than are used in most data communications applications.

  • Page 89: Serial Interface Pin Definitions

    ECHNICAL EFERENCE Serial Interface Pin Definitions Signal Source DB-25 DB-9 Circuit Function Computer/Modem — Chassis Ground Both Transmitted Data Computer Received Data Modem Request to Send Computer Clear to Send Modem Data Set Ready Modem Signal Ground Both Carrier Detect Modem —...

  • Page 90: Manufacturer's Declaration Of Conformity

    EGULATORY NFORMATION AND IMITED ARRANTY Notice: This modem was not designed Part 15: or approved for use in Europe, Operation is subject to the following two Australia, and New Zealand. conditions: (1) this device may not cause harmful Manufacturer’s Declaration of electromagnetic interference, and Conformity (2) this device must accept any interference...
  • Page 91 EGULATORY NFORMATION AND IMITED ARRANTY You must provide this information to the Caution to the User telephone company if requested. The user is cautioned that any changes or modifications not expressly approved by the The REN is used to determine the number party responsible for compliance could void of devices you may legally connect to your the user’s authority to operate the...
  • Page 92 EGULATORY NFORMATION AND IMITED ARRANTY Radio and Television Interference dans la norme sur le matériel brouilleur: Appareils Numériques, NMB-003 édictée This equipment generates and uses radio par l'Industrie Canada. frequency energy and if not installed and used properly, in strict accordance with the UL Listing/CUL Listing (Internal manufacturer’s instructions, may cause Products Only)
  • Page 93 EGULATORY NFORMATION AND IMITED ARRANTY How to Identify and Resolve Radio-TV to correct the problem with one or more of Interference Problems the following measures: Stock No. 004-000-0345-4 Reorient the receiving antenna (for U.S. Government Printing Office televisions with antenna reception only) Washington, DC 20402 or cable input device.
  • Page 94 EGULATORY NFORMATION AND IMITED ARRANTY appropriate Terminal Equipment Technical users to connect their equipment to jacks Requirements document(s). The except in precise situations that are spelled Department does not guarantee the out in tariffing arrangements with those equipment will operate to the user’s companies.
  • Page 95 EGULATORY NFORMATION AND IMITED ARRANTY CAUTION: Do NOT attempt to make such Avant d'installer ce matériel, l'utilisateur doit connections yourself. Instead, contact an s'assurer qu'il est permis de le raccorder aux installations de l'entreprise locale de electric inspection authority or electrician, télécommunication.

  • Page 96: Limited Warranty

    EGULATORY NFORMATION AND IMITED ARRANTY Pour sa propre protection, l'utilisateur doit 3Com Corporation Limited s'assurer que tous les fils de mise à la terre Warranty de la source d'énergie électrique, des lignes téléphoniques et des canalisations d'eau 3Com warrants this hardware product to be métalliques, s'il y en a, sont raccordés free from defects in workmanship and ensemble.
  • Page 97 EGULATORY NFORMATION AND IMITED ARRANTY 3Com warrants any replaced or repaired as not meeting this standard. If it appears product or part for ninety (90) days from that any product that is stated to meet this shipment, or the remainder of the initial standard does not perform properly with warranty period, whichever is longer.
  • Page 98 EGULATORY NFORMATION AND IMITED ARRANTY 3Com OBTAINING WARRANTY SERVICE: SRO# ______________ Customer must contact a 3Com Corporate Attn: Dock 15 PCD Service Center or an Authorized 3Com Service Center within the applicable 1800 W. Central Ave. Mt. Prospect, IL 60056 warranty period to obtain warranty service authorization.
  • Page 99 EGULATORY NFORMATION AND IMITED ARRANTY LAW, THE FOREGOING WARRANTIES THE SALE, INSTALLATION, AND REMEDIES ARE EXCLUSIVE MAINTENANCE OR USE OF ITS AND ARE IN LIEU OF ALL OTHER PRODUCTS. WARRANTIES, TERMS, OR 3COM SHALL NOT BE LIABLE UNDER CONDITIONS, EXPRESS OR IMPLIED, THIS WARRANTY IF ITS TESTING EITHER IN FACT OR BY OPERATION AND EXAMINATION DISCLOSE THAT...
  • Page 100 EGULATORY NFORMATION AND IMITED ARRANTY LIMITATION OF LIABILITY. TO THE LIABILITY TO REPAIR, FULL EXTENT ALLOWED BY LAW, REPLACEMENT, OR REFUND OF THE PURCHASE PRICE PAID, AT 3COM'S 3COM ALSO EXCLUDES FOR ITSELF OPTION. THIS DISCLAIMER OF AND ITS SUPPLIERS ANY LIABILITY, WHETHER BASED IN CONTRACT OR LIABILITY FOR DAMAGES WILL NOT TORT (INCLUDING NEGLIGENCE),...
  • Page 101 EGULATORY NFORMATION AND IMITED ARRANTY This warranty gives you specific legal rights which may vary depending on local law. GOVERNING LAW: This Limited Warranty shall be governed by the laws of the State of California, U.S.A. excluding its conflicts of laws principles and excluding the United Nations Convention on Contracts for the International Sale of Goods.

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