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56K Voice Faxmodem Internal User’s Guide PN 1.024.1644 - 00.
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 standar d for V.
Table of Contents WELCOME TO 56K INFOR MATION ACCESS ...................................... 1 PRODUCT FEATURES ....................................................................... 2 INTERNAL MODEM INSTA LLATION WITH WINDOWS 95 ................... 5 D ETERMINING A VAILABLE R ESOURCES .
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Table of Contents TECHNICAL REFERENCE ................................................................ 51 T YPING C OMMANDS .......................................................................... 51 B ASIC D ATA C OMMANDS ..........................
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Welcome to 56K*Information Access 56K Voice Faxmodem Internal - User’s Guide 1 The International Telecommunications Union (ITU) dec ides the technical protocols that communications devices must use to operate with each other. Modems that comply with ITU standards can “talk” to other standards - compliant modems and fax machines worldwide.
Product Features 56K Voice Faxmodem Internal - User’s Guide 2 Modulation Schemes ITU - T V.90 x2™ technology (Download up to 56kbps, and Upload using V.34) ITU - T V.34+ ITU - T V.34 ITU - T V.32bis ITU - T V.32 ITU - T V.23 ITU - T V.22bis ITU - T V.
Product Features 56K Voice Faxmodem Internal - User’s Guide 3 Back Channel Link Rates (Upload Speeds) 4800, 7200, 9600, 12000, 14400, 16800, 19200, 21600, 24000, 26400, 28800, 31200 V.34+ Link Rates 4800, 7200, 9600, 12000, 14400, 16800, 19200, 21600, 24 000, 26400, 28800, 31200, 33600 V.
Product Features 56K Voice Faxmodem Internal - User’s Guide 4 Flash ROM Upgradable 56K Voice Faxmodem Internal supports software download through flash memory.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 5 Before you start your installation, make sure that you have the following items: Modem U.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 6 You will see the IRQs your system is currently using. If IRQs 3, 4, 5, and 7 are being used, you need to free an IRQ before you begin installation.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 7 Plug and Play Installation This modem’s factory default setting is “Plug and Play” operation. If you are using the Windows 95 environment, the COM port and IRQ will automatically be set to Windows as the environment.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 8 4. When doing a “Plug and Play” installation, the jumper shunts should be placed so that they are hanging from single jumper pins rathe r than on pairs of pins.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 9 4. R emove the screws from your computer’s cover and then remove the cover, as shown in the following diagrams. Your computer may differ in appearance from these diagrams, but the basic principle for removing the cover should be the same.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 10 6. Holding the modem by each corner, align the gold edge with the empty expansion slot. Push down gently until the modem snaps into the slot. The diagram shows horizontally aligned expansion slots.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 11.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 12 You cannot use the modem and a phone at th e same time if they share the same telephone line.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 13 Installing Modem Drivers with Windows 95: Versions 950 and 950a Moving Through the “New Hardware Found” Screens 1. When Windows 95 starts, it should detect the modem.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 14 3. Once Windows finishes loading the information from the disk, verify that the modem installation w as a success. When your desktop returns, click the Windows Start button and point to Settings .
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 15 5. In the “Modems Properties” screen, you should see a description for your modem. This means the installation was a success . Click OK. If you do not see your modem listed in the preceding screen, the Plug and Play installation was unsuccessful.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 16 6. Click More Info…. Click OK . Turn to “Software Installation” on page 29 for information about installing communications software.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 17 Installing Modem Drivers with Windows 95: Version 950b Using the Update Device Driver Wizard Screens 1. Start Windows. Insert the U.S. Robotics disk into your disk drive.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 18 3. Now 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 .
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 19 5. In the “Modems Properties” screen, you should see a description of your modem. This means the installation was a success. Click OK . If you do not see your modem listed in the preceding screen, the Plug and Play installation was unsuccessful.
Internal Modem Installation with Windows 95 56K Voice Faxmodem Internal - User’s Guide 20 7. Click More Info…. Click OK . Turn to “Software Installation” on page 29 for information about installing communications software.
Internal Modem Installation with Windows 3.x 56K Voice Faxmodem Internal - User’s Guide 21 Before you start your installation, make sure that you have the following items: Modem U.
Internal Modem Installation with Windows 3.x 56K Voice Faxmodem Internal - User’s Guide 22 Accessories cannot share COM ports and s hould not share IRQs. When accessories try to share settings, they will either not work properly or not work at all. 3Com has set your modem to a default Plug and Play setting geared towards Windows 95 users.
Internal Modem Installation with Windows 3.x 56K Voice Faxmodem Internal - User’s Guide 23 The jumper shunts will be hanging from single jumper pins as shown in the following illustration. 4. To change the COM port and IRQ settings, you need to reposition the jumper shunts on the COM port and IRQ pins.
Internal Modem Installation with Windows 3.x 56K Voice Faxmodem Internal - User’s Guide 24 The following are recommended combinations of COM port and IRQ settings when not using Plug and Play: COM 1, IRQ 4 or COM 2, IRQ 3 Most computers provide you with COM1 and COM2.
Internal Modem Installation with Windows 3.x 56K Voice Faxmodem Internal - User’s Guide 25 2. Turn off your computer and unplug it from the electrical outlet. 2. 3. Unplug any peripheral devices (printer, monitor, keyboard, mouse, etc.) from the computer.
Internal Modem Installation with Windows 3.x 56K Voice Faxmodem Internal - User’s Guide 26 5. Find an empty ISA expansion slo t that’s at least as long as the gold edge of your modem. (ISA slots are dark plastic grooves lined with metal.) Unscrew and remove the expansion slot cover.
Internal Modem Installation with Windows 3.x 56K Voice Faxmodem Internal - User’s Guide 27 7. Once the modem is inserted, fasten it firmly into place using the screw that you removed in step 5. 8. Replace the computer’s cover and fasten it with the screws you removed in step 4.
Internal Modem Installation with Windows 3.x 56K Voice Faxmodem Internal - User’s Guide 28 14. Plug the power cords, cables, and peripherals back into the computer and turn on the computer. 15. Start Windows 3.x. 16. If you have your modem set to COM1/IRQ4 or COM2/IRQ3, go to “Software Installation” on page 29.
Internal Modem Installation with Windows 3.x 56K Voice Faxmodem Internal - User’s Guide 29 20. Set the Baud Rate to the highest option and Flow Control to Hardware. Then click Advanced . 21. In the Interrupt Request Line (IRQ) box, select the IRQ. 22.
Software Installation 56K Voice Faxmodem Internal - User’s Guide 30 Voice Fax, Data, and Telecommunications Software (communications software) allows sending and receiving faxes directly from your computer desktop.
Software Installation 56K Voice Faxmodem Internal - User’s Guide 31 Refer to your software manual for the specific installation instructions. The software’s installation program will ask you questions about the modem you are using. You may need the following information when installing a communications software package.
Software Installation 32 56K Voice Faxmodem Internal - User’s Guide Read This First! 1. Click Windows Start, point to Settings, and click Control Panel. 2. Double - click the Modems icon . 3. Click the Diagnostics tab . 4. Click on the COM port that your modem is assigned to, so that it is highlighted.
Troubleshooting 56K Voice Faxmodem Internal - User’s Guide 33 POSSIBLE SOLUTION You may have a COM port/IRQ conflict. If you have an internal modem and a Windows 95 system, right - click on the My Computer icon on your desktop. Click Properties . Click the Device Manager tab.
Troubleshooting 34 56K Voice Faxmodem Internal - User’s Guide POSSIBLE SOLUTION You may have plugged your m o dem’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 (marked with a wall jack icon on externals).
Troubleshooting 56K Voice Faxmodem Internal - User’s Guide 35 PROBLEM: Both modems sound like they are exchange carrier signals, but fail to establish a connection. POSSIBLE SOLUTION You may have a poor line conne c tion. Place the call again. Calls are routed differently each time.
Troubleshooting 36 56K Voice Faxmodem Internal - User’s Guide PROBLEM: Errors are co n stantly occurring in your V.17 fax transmissions. POSSIBLE SOLUTION Your modem initialisation string may be insufficient for fax tran s missions.
Troubleshooting 56K Voice Faxmodem Internal - User’s Guide 37.
Troubleshooting 38 56K Voice Faxmodem Internal - User’s Guide PROBLEM: If Plug and Play does not detect your modem. You have installed the modem and Wi n dows has restarted, but you see only your normal desktop . You do not see any screens indicating new hardware has been detected.
Support Resources 56K Voice Faxmodem Internal - User’s Guide 39 Connecting to the 3Com Bulletin Board System (BBS) To c onnect to the 3Com BBS, dial 33320910308 . 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.
Support Resources 40 56K Voice Faxmodem Internal - User’s Guide Are You Still Having Problems? • Review this manual. • Contact your local reseller/dealer who may be able to provide you with the necessary assistance. • If your reseller/dealer cannot help y ou, contact 3Com Customer Support.
Glossary 56K Voice Faxmodem Internal - User’s Guide 41 Cross references are printed in boldface . Cross references with items in the Technical Reference section are printed in italics .
Glossary 42 56K Voice Faxmodem Internal - User’s Guide certain number of rings. See S - register (S0) in the Technical Reference section..
Glossary 56K Voice Faxmodem Internal - User’s Guide 43 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.
Glossary 44 56K Voice Faxmodem Internal - User’s Guide 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.
Glossary 56K Voice Faxmodem Internal - User’s Guide 45 DCE Data Communications (or Circuit - Terminating) Equipment is 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.
Glossary 46 56K Voice Faxmodem Internal - User’s Guide error control A variety of 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 ).
Glossary 56K Voice Faxmodem Internal - User’s Guide 47 ITU - T An international organisation that defines standards for telegraphic and telephone equipment. For example, the Bell 212A standard for 1200 bps communication in North America is observed internationally as ITU - T V.
Glossary 48 56K Voice Faxmodem Internal - User’s Guide online fallback/fall forward A feature that allows a high - speed, error - control modem to monitor line quality and fall back to the n ext lower speed in a defined range if line quality diminishes.
Glossary 56K Voice Faxmodem Internal - User’s Guide 49 ROM Read Only Memory is permanent memory, which is not user - programmable. serial transmission The consecutive flow of data in a single channel. Compare to parallel transmissions where data flows simultaneously in multiple channels.
Glossary 50 56K Voice Faxmodem Internal - User’s Guide V.22 An 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 An ITU - T standard for modem communications at 2400 bps.
Glossary 56K Voice Faxmodem Internal - User’s Guide 51 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.
Technical Reference 52 56K Voice Faxmodem Internal - User’s Guide 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.
Technical Reference 53 Any key Aborts off - hook dial/answer operation and hangs up. AT Required command prefix, except with A/, +++, and A>. Use alone to test for OK result code.
Technical Reference 54 56K Voice Faxmodem Internal - User’s Guide H n Controls ON/OFF hook H0 Hangs up (goes on hook) H1 Goes off hook I n Displays the following information I0 Four - digit product .
Technical Reference 55 S r.b = n Sets bit .b of register r to n (0/OFF or 1/ON) S r = n Sets register r to n . S r ? Displays contents of S - Register r S$ Displays a list of the S - Registers T Sets .
Technical Reference 56 56K Voice Faxmodem Internal - User’s Guide X n Sets result code displayed, default is X4 X n Setting Result Codes X0 X1 X2 X3 X4 0/OK • • • • • 1/CONNECT • • •.
Technical Reference 57 X n (Continued) X n Setting Result Codes X0 X1 X2 X3 X4 256/CONNECT 28000 • • • • 260/CONNECT 29333 • • • • 264/CONNECT 30666 • • • • 268/CONNECT 32000 .
Technical Reference 58 56K Voice Faxmodem Internal - User’s Guide Y n Selects power - on/reset default configuration Y0 Use profile 0 setting in NVRAM Y1 Use profile 1 setting in NVRAM Y2 Use factor.
Technical Reference 59 &D n Controls Data Terminal Ready (DTR) operations &D0 DTR override &D1 DTR toggle causes online Command mode &D2 Normal DTR operations &D3 Res ets on receip.
Technical Reference 60 56K Voice Faxmodem Internal - User’s Guide &N n Sets connect speed, if connection cannot be made at this speed, the modem will hang up. When used in conjunction with &U n and &U n is greater than 0, &N n sets the ceiling connect speed.
Technical Reference 61 &N n (Continued) &N30 45,333 bps &N31 46,666 bps &N32 48,000 bps &N33 49,333 bps &N34 50,666 bps &N35 52,000 bps &N36 53,333 bps &N37 54,666 bps &N38 56,000 bps &N39 57,333 bps &P n Sets pulse (rotary) dial make/b reak ratio &P0 U.
Technical Reference 62 56K Voice Faxmodem Internal - User’s Guide &U n Sets floor connect speed when set above 0, if the connection cannot be established above this speed, the modem will hang up. When &U n is used in conjunction with &N n and &N n is greater than 0, &N n is the ceiling connect speed.
Technical Reference 63 &U n (Continued) &U22 34666 bps &U23 36000 bps &U24 37,333 bps &U25 38666 bps &U26 40000 bps &U27 41,333 bps &U28 42,666 bps &U29 44,000 bps .
Technical Reference 64 56K Voice Faxmodem Internal - User’s Guide.
Technical Reference 65 S - Registers To change a setting, use the ATS r = n command, where r is the register and n is a decimal value from 0 − 255 (unless otherwise indicated). Register Default Function S0 0 Sets the number of rings on which to answer in Auto Answer mode.
Technical Reference 66 56K Voice Faxmodem Internal - User’s Guide Register Default Function S10 14 Sets the duration, in tenths of a secon d, 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.
Technical Reference 67 Register Default Function S13 (Continued) * The 1.5K - byte non - ARQ buffer allows data transfer with Xmodem - and Ymodem - type file transfer protocols without using flow control. The 128 - byte option lets remote users with slower modems keep data you are sending from scrolling off their screens.
Technical Reference 68 56K Voice Faxmodem Internal - User’s Guide Register Default Function S19 0 Sets the duration, in minutes, for the inactivity timer. The timer activates when there is no data activity on the phone line; at time - out the modem hangs up .
Technical Reference 69 Register Default Fun ction S27 (Continued) Bit Value Result 2 4 Disables V.32 modulation. 3 8 Disables 2100 Hz answer tone to allow two V.42 modems to connect faster. 4 16 Enables V.23 fallback mode. 5 32 Disables V.32 bis mode.
Technical Reference 70 56K Voice Faxmodem Internal - User’s Guide Register Default Function S32 2 Bit - mapped register setup. To set the register, see the instructions for S13. Bit Value Result 0 1 V.8 Call Indicate enabled. 1 2 Enable s V.8 mode. 2 4 Reserved.
Technical Reference 71 Register Default Function S34 (Continued) Bit Value Result 5 32 Disable TX level deviation. 6 64 Disable Pre - emphasis. 7 128 Disable Pre - coding. S35 - S37 Reserved S38 0 Sets an optional delay, in seconds, before a forced hang - u p and clearing of the Transmit buffer when DTR drops during an ARQ call.
Technical Reference 72 56K Voice Faxmodem Internal - User’s Guide Fax Commands +FCLASS= n Sets the mode of operation FCLASS=0 Data mode FCLASS=1 Group 3 Facsimile Service Class 1 mode FCLASS? Displa.
Technical Reference 73 +FTH= n Transmits data framed in the HDLC protocol using the modulation specified by n .( n = 3, 24, 48, 72, 96, 97, 98, 121, 22, 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.
Regulatory 74 56K Voice Faxmodem Internal - User’s Guide CE Compliance Electromagnetic Compatibility This device complies with the following standards in accordance with the European Directives 89/336/EEC.
Limited Warranty 56K Voice Faxmodem Internal - User’s Guide 75 U.S. Robotics Access Corp., a subsidiary of 3Com Corporation, warrants to the original end - user purchaser that this product will be free from defects in materials and workmanship for the life of the modem.
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