3Com 1.024.1644-00 manual

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This manual covers installation and operating instructions for the following 3Com U.S. Robotics modem:

56K* Voice Faxmodem Internal

*IMPORTANT! In accordance with the ITU standard for V.90 transmissions, this modem is capable of 56 Kbps downloads. However, the download speeds you experience may be lower due to varying line conditions and other factors. Uploads from users to server equipment travel at speeds up to 31.2 Kbps. An analogue phone line compatible with the ITU V.90 standard or 3Com’s proprietary 56K technology, and an Internet provider or corporate host site with the ITU V.90 standard or 3Com’s proprietary 56K technology are necessary for these high-speed downloads. The ITU V.90 standard was officially determined in February, 1998 and is expected to be ratified in September, 1998. See www.3com.com/56k for details.

The material contained in this document is for information purposes only and is subject to change without notice. 3Com makes no representations or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose.

No part of this document may be reproduced, transmitted, transcribed, or stored in a retrieval system in any form or by any means, mechanical, magnetic, electronic, optical, chemical or otherwise, without the written permission of 3Com.

3Com assumes no responsibility for errors or omissions in this manual. Nor does 3Com make any commitment to update the information contained herein.

3Com, the 3Com logo, and U.S. Robotics are registered trademarks of 3Com Corporation or its subsidiaries. Windows is a registered trademark of Microsoft Corp. Any other trademarks, trade names, service marks, or service names owned or registered by any other company and used in this manual are the property of their respective owners.

Copyright ã1998 3Com Corporation or its subsidiaries

All rights reserved.

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Contents 56K Voice Faxmodem Internal Page Table of Contents Page Table of Contents Page Welcome to 56K*Information Access Product Features Back Channel Link Rates Upload Speeds Flash ROM Upgradable Determining Available Resources Control PanelWindows 95 version Determining Your Version of WindowsClick Properties Plug and Play Installation How to Prepare for Plug and Play InstallationHow to Insert the Modem into the Computer Serial NumberPage Page Page Page Installing Modem Drivers With Windows Versions 950 and 950a Moving Through the New Hardware Found ScreensPage COM Port Click More Info… Installing Modem Drivers With Windows Version 950b Using the Update Device Driver Wizard ScreensPage COM Port Click More Info… Word about COM Ports and IRQs How to Change the Modem’s Settings Page How to Insert the Modem into the Computer Page Page Page Page Restart Now Software Installation WindowsFlow Control Type of ModemInitialisation String Possible Solution Read This FirstTroubleshooting Possible Solution Possible Solution Possible Solution Troubleshooting Possible Solution Support Resources Are You Still Having Problems? Support ResourcesAnalogue loopback Analogue signalsAnswer mode ApplicationGlossary Binary digit bit Glossary Auto dialBaud rate Bit rateCharacters per second CPS Data modeGlossary Character Class 1Digital signals DefaultDetect phase GlossaryFacsimile Glossary Error controlFax mode Flow controlNonvolatile memory Nvram Local echoModem OFF/ON hookParity Originate modeGlossary Online fallback/fall forward ProtocolStart/stop bits Terminal modeSerial transmission Terminal32 bis 22 bis27ter See online fall back/fall forwardYmodem 42 bisXmodem Ymodem GTechnical Reference Dials the specified phone number, includes the following Technical ReferenceITU-T answer sequence En Sets local echoDisplays the following information Ln Controls speaker volume internals onlyTechnical Reference Hn Controls ON/OFF hook Mn Operates speakerNumeric codes Verbal codesTechnical Reference Sets result code displayed, default is 11/RINGINGTechnical Reference An Enables/disables additional result code subsets see Xn Resets modemDisplays a list of ampersand & commands Cn Controls Carrier Detect CD signalSets Guard Tone Fn Loads a read-only non-programmable factory configurationKn Enables/disables data compression Hn Sets Transmit Data TD flow control see also &Rn300 bps Sets pulse rotary dial make/break ratio No restrictions on the minimum speed for Wn Writes current configuration to Nvram templates Yn Sets break handling64 56K Voice Faxmodem Internal User’s Guide Register Default Function RegistersDefault Function Bit Value ResultTechnical Reference Register Default Function S13Timer S27 See the instructions for S13 S34 Bit Fax Commands +FCLASS=n Sets the mode of operationDisplayed As a number Words Description +FTH=n+FRH=n Regulatory CE ComplianceLimited Warranty