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US Robotics 3CP5613 User Manual

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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,
and x2 are trademarks of 3Com Corporation. Windows is a registered trademark of Microsoft Corp. 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 © 1999 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.

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Summary of Contents for US Robotics 3CP5613

  • 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, and x2 are trademarks of 3Com Corporation. Windows is a registered trademark of Microsoft Corp. 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.

  • Page 3: Table Of Contents

    ABLE OF 56K Faxmodem Product Features ...1-1 Software Installation ... 2-1 Speakerphone Features (External Voice Speakerphone Modems Only) ... 3-1 Internet Update Wizard... 4-1 Uninstalling a U.S. Robotics Modem ... 5-1 Uninstalling a Winmodem Modem... 5-1 Uninstalling an Internal Faxmodem ... 5-2 Uninstalling an External Faxmodem ...
  • Page 4 56K F Modulation Schemes ITU-T V.90 x2™ technology ITU-T V.34+ ITU-T V.34 ITU-T V.32bis ITU-T V.32 ITU-T V.22bis ITU-T V.22 ITU-T V.23 Bell 212A ITU-T V.21 Bell 103 Error Control and Data Compression Schemes ITU-T V.42 ITU-T V.42bis MNP 2-5 AXMODEM RODUCT Fax Modulation Schemes...

  • Page 5: Running The Setup Wizard

    Running the Setup Wizard The instructions for installing your Connections software are on the installation map included in your modem’s box. If you have not completed this portion of your install, you should do so now. Using Connections Software Once installation is complete, you can use the Connections CD at any time by following these steps: Insert the Connections CD into your CD-ROM drive.

  • Page 6: Speakerphone Features (External Voice Speakerphone Modems Only)

    PEAKERPHONE EATURES Making a Speakerphone Call with a Telephone 1. Make sure your telephone is plugged into the modem’s PHONE jack. 2. Lift the telephone’s handset. 3. Dial the phone number. 4. When the person on the other end answers, press the SPEAKER button (on top of the modem).
  • Page 7 PEAKERPHONE EATURES XTERNAL OICE PEAKERPHONE ODEMS Muting a Call If you’d like to say something without the receiving party hearing you, you can press the MUTE button. When you mute a call, the ONLINE light will blink. To turn off the mute feature, press MUTE again. (The ONLINE light will stop blinking and remain illuminated for the remainder of the call.)

  • Page 8: Software Installation

    The Connections CD-ROM, which came with your modem, includes the 3Com Internet Update Wizard. This software is designed to quickly update your modem to the latest code. NOTE: You can also obtain this software from our BBS (847-262-6000; log in as Modem Utility, and the setup file will be downloaded) or from our Web page (http://consumer.3com.com/support/index.html).

  • Page 9: Uninstalling A Winmodem Modem

    NINSTALLING A NOTE: These instructions only apply to current U.S. Robotics modems. If the modem you’ll be uninstalling was made by another manufacturer, refer to that modem’s documentation for uninstall instructions. To Uninstall ® A Winmodem Modem, see page 5-1. An Internal Faxmodem, see page 5-2.

  • Page 10: Uninstalling An Internal Faxmodem

    CAUTION : To avoid the risk of electric shock, make sure your computer and all peripheral devices are turned off and unplugged. 13. Remove the computer’s cover. (If you do not know how, refer to your computer’s documentation.) 14. Find the modem inside the computer. (It will be the green board with TELCO (or ) and PHONE (or on its metal bracket.)
  • Page 11 4. Double-click the Modems icon. 5. Click to highlight the name of the modem you wish to remove. 6. Click the Remove button. 7. Remove the phone cords from the modem’s TELCO (or ) and PHONE (or ) jacks. 8. Shut down Windows. CAUTION : To avoid the risk of electric shock, make sure your computer and all peripheral devices are...

  • Page 12: Troubleshooting And Help Resources

    ROUBLESHOOTING AND External Modems ... 6-3 Basic Troubleshooting Steps... 6-3 My Computer Isn’t Recognizing my Modem... 6-4 My Software Isn’t Recognizing my Modem ... 6-5 My Modem Won’t Dial Out or Doesn’t Answer Incoming Calls... 6-6 My Modem Sounds Like it’s Trying to Connect to Another Modem, but Fails... 6-7 My Modem Isn’t Achieving a 56K Internet Connection ...
  • Page 13 Internal ISA Modems ... 6-28 Basic Troubleshooting Steps... 6-28 My Computer Isn’t Recognizing my Modem... 6-28 My Software Isn’t Recognizing my Modem ... 6-30 My Modem Won’t Dial Out or Doesn’t Answer Incoming Calls... 6-31 My Modem Sounds Like it’s Trying to Connect to Another Modem, but Fails... 6-32 My Modem Isn’t Achieving a 56K Internet Connection ...

  • Page 14: External Modems

    EXTERNAL MODEMS Basic Troubleshooting Steps Is your modem turned on? When your modem is properly connected to power and is turned on, the CS light on the front panel will be on. Is your power supply connected properly to both your modem and an electrical outlet? If it is, check the outlet with another electric device (like a lamp) to be sure that you are getting power.

  • Page 15: My Computer Isn't Recognizing My Modem

    If there are DIP switches on the back of your modem, are they set correctly? DIP switches 3, 5, and 8 should be in the down position. See the diagram below for the proper settings. Is your phone cord properly connected? The phone cord should be plugged into the phone jack.

  • Page 16: My Software Isn't Recognizing My Modem

    Windows 95/98 Make sure your COM port is not already in use by another modem. Click Windows Start, Settings, and Control Panel, and then double-click Modems. Look for another modem already in the machine. If there is another modem installed, click the Diagnostics tab to find out which COM port it is using.

  • Page 17: My Modem Won't Dial Out Or Doesn't Answer Incoming Calls

    ROUBLESHOOTING AND ESOURCES Possible solution: Make sure the modem is plugged in and turned on. If it is, check the outlet with another electric device (like a lamp) to be sure that you are getting power. Also, you must use the power supply that came with your modem; other similar-looking power supplies may be of different voltages and could damage your modem.

  • Page 18: My Modem Sounds Like It's Trying To Connect To Another Modem, But Fails

    ROUBLESHOOTING AND ESOURCES Possible solution: You might have a bad phone cord connection to your modem, or your phone cord may be plugged into the wrong jack. The phone cord should be plugged into the jack on the modem and into the wall phone jack. Use the phone cord included in your modem's box if possible.
  • Page 19 ROUBLESHOOTING AND ESOURCES Windows 98 Windows NT Possible solution: Make sure the DIP switches on the back of your modem are set correctly. DIP switches 3, 5, and 8 should be in the down position. See the diagram below for the proper settings.

  • Page 20: My Modem Isn't Achieving A 56K Internet Connection

    PROBLEM: My modem isn’t achieving a 56K Internet connection. Note: Due to current FCC regulations, maximum download speed is limited to 53,333 bps. Our research has shown that the vast majority of telephone lines in North America can and do support 56K connections. The V.90 protocol allows for connection speeds of up to 56K, but line conditions may affect the actual speeds during a given connection.

  • Page 21: External Usb Modems

    EXTERNAL USB MODEMS Basic Troubleshooting Steps 1. Is your modem turned on? When your modem is properly connected to power and is turned on, the Power light on the front panel will be on. 2. Is your power supply connected properly to both your modem and an electrical outlet? If it is, check the outlet with another electric device (like a lamp) to be sure that you are getting power.

  • Page 22: My Computer Isn't Recognizing My Modem

    USB A to B cable NOTE: You should NOT attempt to connect or use your modem with both the USB and serial cable connected at the same time. Your modem may fail to respond. If this occurs, you must power down your computer, disconnect the cable you are not using, and restart your system.
  • Page 23 ROUBLESHOOTING AND ESOURCES IF YOU ARE USING THIS MODEM AS A USB DEVICE: Possible solution: Your USB port may not be enabled. To ensure USB is enabled on your system. Click Windows Start. Then click Settings, and then Control Panel. Click the System icon. Next click the Device Manager tab. If your USB is enabled, there will be a USB icon (+ Universal serial bus controller) under Computer.
  • Page 24 Possible solution: If the modem has worked previously and you removed the USB cable from the computer and then reattached it, try another USB port. It may have been set up originally on the other USB port. You should notice some minimal activity from your computer such as hard disk activity or an hour glass icon for a few seconds when you insert or remove a USB cable from the computer or the USB device.

  • Page 25: My Software Isn't Recognizing My Modem

    ROUBLESHOOTING AND ESOURCES PROBLEM: My software isn’t recognizing my modem. Possible solution: Your communications software may not function properly if you have more than one version of the software installed, you are using an older version, or you have more than one communications software installed on your system. We highly recommend using the communications software provided with your modem on the Connections CD-ROM.

  • Page 26: My Modem Sounds Like It's Trying To Connect To Another Modem, But Fails

    ROUBLESHOOTING AND ESOURCES select Properties. Make sure that the description in the modem box matches the description of the modem you are using. If it doesn’t match, select the proper modem description. FOR BOTH DIALING AND ANSWERING PROBLEMS: Possible solution: Make sure that you are using the power supply that came with your modem;...
  • Page 27 ROUBLESHOOTING AND ESOURCES Possible solution: You may have a poor connection. All calls are routed differently, so try placing the call again. You may see one of the following error messages. Windows 95 Windows 98 Windows NT 6-16...

  • Page 28: My Modem Isn't Achieving A 56K Internet Connection

    PROBLEM: My modem isn’t achieving a 56K Internet connection. Note: Due to current FCC regulations, maximum download speed is limited to 53,333 bps. Our research has shown that the vast majority of telephone lines in North America can and do support 56K connections. The V.90 protocol allows for connection speeds of up to 56K, but line conditions may affect the actual speeds during a given connection.

  • Page 29: Macintosh Modems

    Macintosh Modems Basic Troubleshooting Steps Is your modem turned on? When your modem is properly connected to power and is turned on, the TR and CS lights on the front panel will be on. Is your power supply connected properly to both your modem and an electrical outlet? You must use the power supply that came with your modem;...

  • Page 30: My Computer Isn't Recognizing My Modem

    ROUBLESHOOTING AND ESOURCES PROBLEM: My computer isn’t recognizing my modem. Possible solution: Make sure the modem is plugged in and turned on. Also, you must use the power supply that came with your modem; other similar- looking power supplies may be of different voltages and could damage your modem. When your modem is properly connected to power and is turned on, the TR and CS lights on the front panel will be on.

  • Page 31: My Modem Won't Dial Out Or Doesn't Answer Incoming Calls

    ROUBLESHOOTING AND ESOURCES PROBLEM: My modem won't dial out or doesn't answer incoming calls. FOR BOTH DIALING AND ANSWERING PROBLEMS: Possible solution: Make sure that you are using the power supply that came with your modem; other similar-looking power supplies may be of different voltages and could damage your modem.

  • Page 32: My Modem Sounds Like It's Trying To Connect To Another Modem, But Fails

    ROUBLESHOOTING AND ESOURCES DIALING PROBLEMS FOR VOICE MAIL USERS: Possible solution: If you have voice mail provided by your local phone company, your dial tone may be altered when messages are waiting. Retrieve your voice mail to restore your normal dial tone. PROBLEM: My modem sounds like it’s trying to connect to another modem, but fails.
  • Page 33 • The server you’re dialing in to must support and provide a digital V.90 signal. Your ISP can provide you with a list of dial-up connections and information on what those connections currently support. • The telephone line between your ISP and your modem must be capable of supporting a 56K connection and contain only one analog-to-digital conversion.

  • Page 34: Internal Winmodem Modems

    INTERNAL WINMODEM MODEMS Basic Troubleshooting Steps 1. Make sure that your phone cord is properly connected. Remove the phone cord from the modem and wall jacks. Clean any dirt or corrosion from the cord and jacks. Reinsert the cord securely in the wall jack and the modem’s included with your modem, if possible.

  • Page 35: My Software Isn't Recognizing My Modem

    your modem, double-click the Computer icon. The “Computer Properties” screen will appear. When it does, click the View Resources tab, then click Interrupt request (IRQ) to make sure that it is selected. On the left side of the “Computer Properties” screen is a list of the system IRQs, numbered 0 through 15. On the right side are the devices that are using these IRQs.

  • Page 36: My Modem Won't Dial Out Or Doesn't Answer Incoming Calls

    ROUBLESHOOTING AND ESOURCES Possible solution: You may not have the correct modem type selected in your software or in Windows. Click on Windows Start, Settings, and Control Panel. When Control Panel opens, click Modems. Here you will see a list of installed modems. You can also add, remove, or view the properties of modems from this window.

  • Page 37: My Modem Sounds Like It's Trying To Connect To Another Modem, But Fails

    ROUBLESHOOTING AND ESOURCES Possible solution: If you have voice mail provided by your local phone company, your dial tone may be altered when messages are waiting. Retrieve your voice mail to restore your normal dial tone. PROBLEM: My modem sounds like it’s trying to connect to another modem but fails. Possible solution: You may have a poor connection.

  • Page 38: My Modem Isn't Achieving A 56K Internet Connection

    Windows NT PROBLEM: My modem isn’t achieving a 56K Internet connection. Note: Due to current FCC regulations, maximum download speed is limited to 53,333 bps. Our research has shown that the vast majority of telephone lines in North America can and do support 56K connections. The V.90 protocol allows for connection speeds of up to 56K, but line conditions may affect the actual speeds during a given connection.

  • Page 39: Internal Isa Modems

    INTERNAL ISA MODEMS Basic Troubleshooting Steps 1. Make sure that your phone cord is properly connected. Remove the phone cord from the modem and wall jacks. Clean any dirt or corrosion from the cord and jacks. Reinsert the cord securely in the wall jack and the modem’s with your modem, if possible.
  • Page 40 Locate your modem in the list of devices. If a yellow exclamation point appears over the modem’s description, your modem is in conflict with another device. Either your modem or the other device will have to be reinstalled to another IRQ in order to resolve your conflict.

  • Page 41: My Software Isn't Recognizing My Modem

    Windows NT Turn off your computer and remove your modem. Restart and click Windows Start, Settings, and then Control Panel. Double- click the Ports icon. Your modem must be jumpered to a COM port setting that does not appear in this list. PROBLEM: My software isn’t recognizing my modem.

  • Page 42: My Modem Won't Dial Out Or Doesn't Answer Incoming Calls

    ROUBLESHOOTING AND ESOURCES Possible solution: If you are using Dial-Up Networking, it may not be configured correctly. Check your configuration and make sure you have the correct modem selected. Double-click My Computer, double-click Dial-Up Networking, right-click the connection you are trying to use, and click Properties.

  • Page 43: My Modem Sounds Like It's Trying To Connect To Another Modem, But Fails

    ROUBLESHOOTING AND ESOURCES VOICE MAIL USERS: Possible solution: If you have voice mail provided by your local phone company, your dial tone may be altered when messages are waiting. Retrieve your voice mail to restore your normal dial tone. PROBLEM: My modem sounds like it’s trying to connect to another modem but fails. Possible solution: You may have a poor connection.

  • Page 44: My Modem Isn't Achieving A 56K Internet Connection

    PROBLEM: My modem isn’t achieving a 56K Internet connection. Note: Due to current FCC regulations, maximum download speed is limited to 53,333 bps. Our research has shown that the vast majority of telephone lines in North America can and do support 56K connections. The V.90 protocol allows for connection speeds of up to 56K, but line conditions may affect the actual speeds during a given connection.

  • Page 45: Internal Pci Modems

    Internal PCI Modems Basic Troubleshooting Steps 1. Make sure that your phone cord is properly connected. Remove the phone cord from the modem and wall jacks. Clean any dirt or corrosion from the cord and jacks. Reinsert the cord securely in the wall jack and the modem’s with your modem, if possible.
  • Page 46 If a usable, free IRQ does not exist, you may need to remove, disable, or relocate another device. Refer to that device’s documentation for more information about removing, disabling, or relocating it. If Windows still fails to recognize your modem and it does not have a yellow exclamation point next to its IRQ, or if your modem doesn’t appear in the list, another problem exists, and you may need to call 3Com Technical Support.

  • Page 47: My Software Isn't Recognizing My Modem

    Windows NT Turn off your computer and remove your modem. Restart and click Windows Start, Settings, and then Control Panel. Double- click the Ports icon. Your modem must be set to a COM port setting that does not appear in this list. PROBLEM: My software isn’t recognizing my modem.
  • Page 48 ROUBLESHOOTING AND ESOURCES FOR BOTH DIALING AND ANSWERING PROBLEMS: Possible solution: You may have a bad phone cord connection to your modem, or your phone cord may be plugged into the wrong jack. The phone cord should be plugged into the jack on the modem and into the wall phone jack.

  • Page 49: My Modem Sounds Like It's Trying To Connect To Another Modem, But Fails

    PROBLEM: My modem sounds like it’s trying to connect to another modem but fails. Possible solution: You may have a poor connection. All calls are routed differently, so try placing the call again. PROBLEM: My modem isn’t achieving a 56K Internet connection. Note: Due to current FCC regulations, maximum download speed is limited to 53,333 bps.

  • Page 50: Help Resources

    Help Resources World Wide Web Contains useful product information, documents, and manuals. Log on to: http://consumer.3com.com/support/index.html 3Com Knowledgebase A Web-based troubleshooting tool that will help you solve problems you may be having with your modem. Go to knowledgebase.3com.com When the page loads, click the Modems graphic. Then follow the onscreen directions.

  • Page 51: If You Need To Return The Modem To 3Com For Repair

    NOTE: If you can, have your ati7 information written down on a piece of paper before you call tech support. Regular Phone Service In the United States: 847 262 5151 8:00 am - 6:00 pm CST Monday - Friday. Automated service is available 24 hours a day, 7 days a week.
  • Page 52 Cross references are printed in boldface. analog loopback A modem self-test in which data from the keyboard or an internal test pattern is sent to the modem's transmitter, turned into analog form, looped back to the receiver, and converted back into digital form. analog 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.

  • Page 53: Glossary

    character A representation, coded in binary digits, of a letter, number, or other symbol. characters per second (cps) A data transfer rate generally estimated from the bit rate and the character length. For example, at 2400 bps, 8-bit characters with start/stop bits (for a total of ten bits per character) will be transmitted at a rate of approximately 240 characters per second (cps).
  • Page 54 LOSSARY 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.
  • Page 55 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. flow control A mechanism that compensates for differences in the flow of data into and out of a modem or other device.
  • Page 56 online fall back/fall forward A feature that allows high-speed, error-control modems to monitor line quality and fall back to the next lower speed in a defined range if line quality diminishes. As line conditions improve, the modems switch up to the next higher speed.
  • Page 57 V.22 bis An 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 ter An ITU-T standard for facsimile operations that specifies modulation at 4800 bps, with fallback to 2400 bps.
  • Page 58 uses the digital telephone network to increase the bit rate of the receive channel by eliminating the analog to digital conversion commonly found in modem connections. V.90 connections require a modem with V.90 or x2 technology calling a digitally connected Internet Service Provider or corporate host site compatible with V.90 or x2 technology.

  • Page 59: Technical Reference

    ECHNICAL EFERENCE Front-of-the-Case Lights (External Faxmodems) ...8-2 Top-of-the-Case Lights (Voice Faxmodem Pro Externals) ...8-2 Typing Commands ...8-3 Basic Data Commands...8-4 Extended Data Commands ...8-8 DIP Switches...8-12 S-Registers...8-13 Fax Commands...8-20 Screen Messages ...8-21 The Serial Interface ...8-22 Serial Interface Pin Definitions ...8-22...

  • Page 60: Front-Of-The-Case Lights (External Faxmodems)

    Front-of-the-Case Lights (External 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 ...Carrier Detect ON if modem receives a valid data signal (carrier) from a remote modem, indicating that data transmission is possible.

  • Page 61: Typing Commands

    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. For example, if you type ATB, the command ATB0 is assumed.

  • Page 62: Basic Data Commands

    Basic Data Commands <control key>S Stop or restart help screens. <control key>C or <control key>K Stop help screens. Use in conjunction with D, S, or & commands (or just AT) to display a basic command list; online help. Manual Answer: Goes off hook in answer mode. Pressing any key aborts the operations.
  • Page 63 Basic Data Commands Sets local echo. Echo OFF Modem displays keyboard commands Sets online local echo of transmitted data ON/OFF. Local echo ON. Modem sends a copy of the data it sends to the remote system to your screen. Local echo OFF. Receiving system may send a remote echo of data it receives.
  • Page 64 Basic Data Commands Displays verbal/numeric result codes. Numeric codes Verbal codes Sets result code displayed. Default is X4. NOTE: Result codes 0 - 155 are for 33.6 products and V.90 products. Result codes above 155 apply only to V.90. Result Codes 0/OK 1/CONNECT 2/RING...
  • Page 65 Basic Data Commands Selects power-on/reset default configuration. Use profile 0 setting in NVRAM Use profile 1 setting in NVRAM Use factory configuration 0. Use factory configuration 1. Use factory configuration 2 Resets modem. Resets modem to NVRAM profile selected by Y command or dip 7. Resets modem to NVRAM profile 0 Resets modem to NVRAM profile 1 Resets modem to factory default profile 0...

  • Page 66: Extended Data Commands

    Extended Data Commands &$ Displays a list of ampersand (&) commands. &An Enables/disables added result code subsets (see Xn). &A0 ARQ result codes disabled &A1 ARQ result codes enabled &A2 V.32 modulation indicator added &A3 Protocol indicators added LAPM/MNP/NONE (error control) and V42bis/MNP5 (data compression) &Bn Manages modem’s serial port rate.
  • Page 67 Extended Data Commands &M3 Reserved &M4 Normal/ARQ &M5 ARQ mode &Nn Sets connect speed. If connection cannot be made at this speed, the modem will hang up. Note: When used in conjunction with &Un and &Un is greater than 0, &Nn sets the ceiling connect speed.
  • Page 68 Extended Data Commands &Rn Sets Receive Data (RD) hardware flow control, Request to Send (RTS) (see also &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;...
  • Page 69 Extended Data Commands Note: &U17 through &U39 apply only to V.90 products. &U17 28,000 bps &U18 29,333 bps &U19 30,666 bps &U20 32,000 bps &U21 33,333 bps &U22 34,666 bps &U23 36,000 bps &U24 37,333 bps &U25 38,666 bps &U26 40,000 bps &U27 41,333 bps &U28 42,666 bps &U29 44,000 bps...

  • Page 70: Dip Switches

    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. Defaults are in italics. Switch Default Function 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...

  • Page 71: S-Registers

    S Registers Note: To change a setting use ATSr=n, where r is the register and n is a decimal value from 0 Register Default Function Sets number of rings on which to answer in Auto Answer mode. When set to 0, Auto Answer is disabled. Counts and stores number of rings from an incoming call.
  • Page 72 S Registers Note: To change a setting use ATSr=n, where r is the register and n is a decimal value from 0 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).
  • Page 73 ECHNICAL EFERENCE S Registers Note: To change a setting use ATSr=n, where r is the register and n is a decimal value from 0 255 (unless otherwise indicated). Register Default Function Note: To disable V.42 detect phase, select sum of bits 3 and 7 (in other words S15 = 136 [8 + 128]) 8-15...
  • Page 74 S Registers Note: To change a setting use ATSr=n, where r is the register and n is a decimal value from 0 Register Default Function Reserved Reserved Test timer for &T loopback testing. Sets the time in seconds of testing before the modem automatically times out and terminates the test.
  • Page 75 S Registers Note: To change a setting use ATSr=n, where r is the register and n is a decimal value from 0 Register Default Function Bit-mapped register setup. To set the register, see instructions for S13. Value Eliminates the V.32 answer tones for a faster connection. Default item, all times are in tenths of seconds.
  • Page 76 S Registers Note: To change a setting use ATSr=n, where r is the register and n is a decimal value from 0 Register Default Function Bit-mapped register setup. To set the register, see the instructions for S13. Value Bit-mapped register setup. To set the register, see the instructions for S13. Value 8-18 ECHNICAL...
  • Page 77 S Registers Note: To change a setting use ATSr=n, where r is the register and n is a decimal value from 0 Register Default Function Bit-mapped register setup. To set registers, see instructions for S13. Value 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.
  • Page 78 S Registers Note: To change a setting use ATSr=n, where r is the register and n is a decimal value from 0 Register Default Function Bit-mapped register setup. To set registers, see instructions for S13. Value Reserved 8-20 ECHNICAL EFERENCE Result Distinctive ring enabled.

  • Page 79: Fax Commands

    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).

  • Page 80: Screen Messages

    Screen Messages 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 81: The Serial Interface

    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. Data is transmitted between the devices over a shielded serial cable with a 25-pin male (DB-25) connector to the modem and a 25-pin, 9-pin, 8-pin, or custom-built connector to the computer.

  • Page 82: Regulatory Information And Limited Warranty

    EGULATORY Notice: This modem was not designed or approved for use in Europe, Australia, or New Zealand. Manufacturer’s Declaration of Conformity 3Com Corporation 3800 Golf Road Rolling Meadows, IL 60008 U.S.A. declares that this product conforms to the FCC’s specifications: Part 15: Operation is subject to the following two conditions: this device may not cause harmful electromagnetic...

  • Page 83: Fax Branding

    have installation instructions detailing user installation of card accessories. Fax Branding The Telephone Consumer Protection Act of 1991 makes it unlawful for any person to use a computer or other electronic device, including fax machines, to send any message unless such message clearly contains in the margin at the top or bottom of each transmitted page or on the first page of the transmission, the date and time it is sent, an identification of the business or...
  • Page 84 For Canadian Modem Users Industry Canada (IC) This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the interference-causing equipment standard entitled Digital Apparatus, ICES-003 of Industry Canada. NOTICE: The Ringer Equivalence Number (REN) assigned to each terminal device provides an indication of the maximum number of terminals allowed to be connected to a telephone interface.
  • Page 85 Les réparations de matériel homologué doivent être coordonnées par un représentant désigné par le fournisseur. L'entreprise de télécommunications peut demander à l'utilisateur de débrancher un appareil à la suite de réparations ou de modifications effectuées par l'utilisateur ou à cause de mauvais fonctionnement.
  • Page 86 OBTAINING WARRANTY SERVICE: Customer must contact a 3Com Corporate Service Center or an Authorized 3Com Service Center within the applicable warranty period to obtain warranty service authorization. Dated proof of purchase from 3Com or its authorized reseller may be required. Products returned to 3Com’s Corporate Service Center must be pre- authorized by 3Com with a User Service Order (USO) number marked on the outside of the package, and sent prepaid and...
  • Page 87 RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, OTHER HAZARDS, OR ACTS OF GOD. LIMITATION OF LIABILITY: TO THE FULL EXTENT ALLOWED BY LAW, 3COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY, WHETHER BASED IN CONTRACT OR TORT (INCLUDING NEGLIGENCE), FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE...

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