3Com 3CP5610A User Manual
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3Com 3CP5610A User Manual

U.s. robotics 56k v90 pci performance pro faxmodem dos/nt/linux
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U.S. Robotics
Modems:
®
User's Guide
http://www.usr.com/
Published September 2000

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  • Page 1 U.S. Robotics Modems: ® User’s Guide http://www.usr.com/ Published September 2000...
  • Page 2 U.S. Robotics, the U.S. Robotics logo, and Winmodem are registered trademarks and x2 is a trademark of U.S. Robotics Corporation. 3Com is a registered trademark and Connections is a trademark of 3ComCorporation. Microsoft, Windows, and Windows NT are registered trademarks of MicrosoftCorporation.

  • Page 3: Table Of Contents

    Fax Link Rates DTE Rates NTERNAL AND X TERNAL Making a Speakerphone Call with a Telephone External Modems with Speakerphone Internal Modems with Speakerphone Making a Speakerphone Call with Communications Software Answering an Incoming Call External Modems with Speakerphone Internal Modems with Speakerphone...
  • Page 4 Uninstalling an External Faxmodem Uninstalling a Macintosh Faxmodem ROUBLESHOOTING AND External Serial Modems Basic Troubleshooting Steps My computer isn't recognizing my modem. My software isn't recognizing my modem. My modem won't dial out or doesn't answer incoming calls. Office Users...
  • Page 5 Voice Mail Users My modem sounds like it’s trying to connect to another modem but fails. My modem isn’t achieving a 56K Internet connection. Internal ISA Modems Basic Troubleshooting Steps My computer isn’t recognizing my modem. My software isn’t recognizing my modem.
  • Page 6 In Canada: LOSSARY ECHNICAL EFERENCE Front-of-the-Case Lights (External Serial Faxmodems) Top-of-the-Case Lights (Voice Faxmodem Pro Externals) Typing Commands Basic Data Commands Extended Data Commands S Registers Bit-Mapped Registers EGULATORY NFORMATION Manufacturer's Declaration of Conformity Tested to comply with FCC Standards for Home and Office Use. Part 15 Caution to the User Part 68...

  • Page 7: Modulation Schemes

    56K F EATURES ITU-T V.92 s Modulation Schemes ITU-T V.90* 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 * models 5686, 5687, 5609, 5610, 5605, 5613 only s on select models AXMODEM technology* RODUCT...

  • Page 8: Error Control And Data Compression Schemes

    1: 56K F HAPTER AXM ODEM Error Control and ITU-T V.42 Data Compression ITU-T V.42bis Schemes MNP 2-5 Fax Modulation ITU-T V.17 Schemes ITU-T V.29 ITU-T V.27ter ITU-T V.21 Fax Standards EIA 578 Class 1 FAX EIA 592 Class 2.0 FAX Front Channel Link 28000, 29333, 30666, 32000, 33333, 34666, 36000, 37333, 38666, Rates (download)

  • Page 9: V.32Bis Link Rates

    V.32bis Link Rates 4800, 7200, 9600, 12000, 14400 Additional Link 300, 1200/75 (V.23), 1200, 2400 Rates Fax Link Rates 2400, 4800, 7200, 9600, 12000, 14400 DTE Rates 300, 1200, 2400, 9600, 19200, 38400, 57600, 115200 V.32bis Link Rates...
  • Page 10 1: 56K F HAPTER AXM ODEM RODU CT EA TURES...

  • Page 11: Nternal And

    NTERNAL AND Making a External Modems with Speakerphone 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 12: Internal Modems With Speakerphone

    PHONE jack. If you are using your communications software to dial speakerphone calls, the software needs to be running in order for you to hear incoming calls. Internal Modems with Speakerphone See your modem’s communications software manual for instructions. Speaking Privately...

  • Page 13: Uninstalling A U.s. Robotics ® Modem

    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 instructions. This chapter covers the uninstallation of: Uninstalling a (Model Numbers 3CP5699A, 3CPxx5699A, 3CPxx2884A, 3CP5695, and...

  • Page 14: Uninstalling An Internal Faxmodem

    1 First, remove the modem from the Windows operating system. From the Start menu, point to Settings and then click Control Panel. 2 Double-click the Modems icon. 3 Click to highlight the name of the modem you wish to remove.

  • Page 15: Uninstalling An External Faxmodem

    Start menu, point to Settings and then click Control Panel. 2. Double-click the System icon. 3. Click the Device Manager tab. 4. Double-click the Modems icon. 5. Click to highlight the name of the modem you wish to remove. 6. Click the Remove button.
  • Page 16 3: U U.S. R ® HAPTER NIN STA LLIN G A OBOTIC S OD EM...

  • Page 17: Troubleshooting And Help Resources

    Make sure you are using an RS-232 modem cable. Check the packaging of the cable you bought. There are many computer cables that look similar to an RS-232, such as a Null Modem cable, that will not work ESOURCES External Serial Modems External USB Modems Macintosh Modems ®...

  • Page 18: My Computer Isn't Recognizing My Modem

    COM 1 & 2 respectively. Windows 2000 Make sure your COM port is not already in use by another modem. Click Windows Start, Settings, and Control Panel, and then double-click Phone and Modem Options. Click the Modems ESOU RCES You need a DB9F/DB25M RS-232 serial cable.
  • Page 19 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 20: My Software Isn't Recognizing My Modem

    Windows. Click on Windows Start, Settings, and Control Panel. When Control Panel opens, click Phone and Modem Options. Click the Modems tab. Here you will see a list of installed modems. You can also add, remove, or view the properties of modems from this window.

  • Page 21: My Modem Won't Dial Out Or Doesn't Answer Incoming Calls

    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. The U.S.

  • Page 22: My Modem Sounds Like It's Trying To Connect To Another Modem But Fails

    4: T HAPTER ROUB LESHOOTING A ND 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 labelled phone jack.
  • Page 23 Lines that do not support 56K today may support 56K in the near future. 3. For a V.90 connection, your modem must be connecting to a V.90/56K server. A pair of 56K modems will not connect to each other at V.90/56K speeds.

  • Page 24: External Usb Modems

    ROUB LESHOOTING A ND 4. For a V.92 connection, your modem must be connecting to a V.92 server. A pair of 56K modems will not connect to each other at V.92/56K speeds. Note: Current IC/FCC regulations limiting power may limit maximum download speeds to 53,333 bps.

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

    RS-232 serial/modem cable. Check the packaging of the cable you bought. There are many computer cables that look similar to an RS-232, External USB Modems You need a DB25F/DB25M RS-232 serial cable.

  • Page 26: If You Are Using This Modem As A Usb Device

    4: T HAPTER ROUB LESHOOTING A ND ESOU RCES such as a Null Modem cable, that will not work correctly with this modem. If You Are Using This Possible solution: Modem as a USB Your USB port may not be enabled. To ensure USB is enabled on your Device system, click Windows Start.

  • Page 27: If You Are Using This Modem As A Serial Device

    Windows 2000 Make sure your COM port is not already in use by another modem. Click Windows Start, Settings, and Control Panel, and then double-click Phone and Modem Options. Click the Modems tab. Look for another modem already in the machine. If there is another modem listed, check which COM port it is using.

  • Page 28: My Software Isn't Recognizing My Modem

    Windows. Click on Windows Start, Settings, and Control Panel. When Control Panel opens, click Phone and Modem Options. Click the Modems tab. Here you will see a list of installed modems. You can also add, remove, or view the properties of modems from this window.

  • Page 29: My Modem Won't Dial Out Or Doesn't Answer Incoming Calls

    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. The U.S.

  • Page 30: Office Users

    My modem isn't Possible solution: achieving a 56K Note: U.S. Robotics 56K modems are capable of receiving downloads at Internet connection. up to 56 Kbps and sending at 31.2 Kbps. Actual download speeds you experience may be lower due to varying line conditions. Maximum download speeds in U.S.

  • Page 31: Macintosh Modems

    Lines that do not support 56K today may support 56K in the near future. 3 Your modem must be connecting to a V.90/56K server. A pair of 56K modems will not connect to each other at V.90/56K speeds. Macintosh Modems Basic Troubleshooting 1.

  • Page 32: My Computer Isn't Recognizing My Modem

    4: T HAPTER ROUB LESHOOTING A ND ESOU RCES panel will be on. If they are not, check your outlet with another electrical device to be sure you are getting power. 3. If there are DIP switches on the back of your modem, are they set correctly? DIP switches 1, 3, 5, and 8 should be in the down position.

  • Page 33: My Software Isn't Recognizing My Modem

    Macintosh Modems modem. Make sure it is connected to the modem port on the back of your computer and not the printer port. My software isn't Possible solution: recognizing my Your communications software may not function properly if you have modem.

  • Page 34: My Modem Sounds Like It's Trying To Connect To Another Modem But Fails

    4: T HAPTER ROUB LESHOOTING A ND phone jack. Use the phone cord included in your modem's box if possible. Possible solution: You may have devices between the modem and the phone jack. There should be no line splitters, fax machines, or other devices between the modem and the wall jack.
  • Page 35 My modem isn’t Possible solution: achieving a 56K Note: U.S. Robotics 56K modems are capable of receiving downloads at Internet connection. up to 56 Kbps and sending at 31.2 Kbps. Actual download speeds you experience may be lower due to varying line conditions. Maximum download speeds in U.S.

  • Page 36: Internal Winmodem® Modems

    Windows 2000 Make sure your COM port is not already in use by another modem. Click Windows Start, Settings, and Control Panel, and then double-click Phone and Modem Options. Click the Modems tab. Look for another modem already in the machine. If there is another modem listed, check which COM port it is using.

  • Page 37: My Software Isn't Recognizing My Modem

    Internal Winmodem® Modems Manager button. Look under Ports (COM & LPT). If the COM Ports have yellow exclamation points or red Xs over them, your COM ports may be configured incorrectly. If this is the case, you may need to contact your computer manufacturer.
  • Page 38 Windows. Click 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. The U.S. Robotics modem you have installed should be present in the list of installed modems.

  • Page 39: My Modem Sounds Like It's Trying To Connect To Another Modem But Fails

    My modem sounds Possible solution: like it’s trying to You may have a poor connection. All calls are routed differently, so try connect to another placing the call again. modem but fails. Internal Winmodem® Modems on the modem and into the wall...

  • Page 40: My Modem Isn't Achieving A 56K Internet Connection

    My modem isn’t Possible solution: achieving a 56K Note: U.S. Robotics 56K modems are capable of receiving downloads at Internet connection. up to 56 Kbps and sending at 31.2 Kbps. Actual download speeds you experience may be lower due to varying line conditions. Maximum download speeds in U.S.

  • Page 41: Internal Isa Modems

    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. Internal ISA Modems . Use the phone cord...
  • Page 42 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 43 Windows 2000 Make sure your COM port is not already in use by another modem. Click Windows Start, Settings, and Control Panel, and then double-click Phone and Modem Options. Click the Modems tab. Look for another modem already in the machine. If there is another modem listed, check which COM port it is using.

  • Page 44: My Software Isn't Recognizing My Modem

    Windows. Click 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. The U.S. Robotics modem you have installed should be present in the list of installed modems.

  • Page 45: My Modem Won't Dial Out Or Doesn't Answer Incoming Calls

    Internal ISA Modems Possible solution: Windows 2000 If you are using Dial-Up Networking, it may not be configured correctly. Check your configuration and make sure you have the correct port selected. Click Start, point to Settings and click Network and Dial-up Connections. Make sure that the description in the “Connect Using”...

  • Page 46: My Modem Sounds Like It's Trying To Connect To Another Modem But Fails

    My modem isn't Possible solution: achieving a 56K Note: U.S. Robotics 56K modems are capable of receiving downloads at Internet connection. up to 56 Kbps and sending at 31.2 Kbps. Actual download speeds you experience may be lower due to varying line conditions. Maximum download speeds in U.S.

  • Page 47: Internal Pci Modems

    56K today may support 56K in the near future. 3. Your modem must be connecting to a V.90/56K server. A pair of 56K modems will not connect to each other at V.90/56K speeds. Internal PCI (Model Numbers 3CP5609, 3CP5610x, and 3CPxx5610x)
  • Page 48 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 49 Windows 2000 Make sure your COM port is not already in use by another modem. Click Windows Start, Settings, and Control Panel, and then double-click Phone and Modem Options. Click the Modems tab. Look for another modem already in the machine. If there is another modem listed, check which COM port it is using.

  • Page 50: My Software Isn't Recognizing My Modem

    Windows 95/98/NT You may not have the correct modem type selected in your software or in Windows. Click 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...

  • Page 51: For Both Dialing And Answering Problems

    Internal PCI Modems the properties of modems from this window. The U.S. Robotics modem you have installed should be present in the list of installed modems. If none of the modem descriptions in the list matches your U.S. Robotics modem or no modems are listed, your modem is not properly installed.

  • Page 52: My Modem Sounds Like It's Trying To Connect To Another Modem But Fails

    My modem isn't Possible solution: achieving a 56K Note: U.S. Robotics 56K modems are capable of receiving downloads at Internet connection. up to 56 Kbps and sending at 31.2 Kbps. Actual download speeds you experience may be lower due to varying line conditions. Maximum download speeds in U.S.

  • Page 53: Help Resources

    U.S. Robotics Knowledgebase A Web-based troubleshooting tool that will help you solve problems you may be having with your modem. Go to: http://www.usr.com/kb When the page loads, click the Modems graphic. Then follow the onscreen directions. Internet FTP ftp://ftp.usr.com...

  • Page 54: Are You Still Having Problems

    This call will have a $2.50 per minute charge. Customer Support via Technical questions about U.S. Robotics modems can be answered by the Phone technical support specialists. If you can, have your ati7 information written down on a piece of paper before you call tech support.

  • Page 55: If You Need To Return The Modem To U.s. Robotics For Repair

    Are You Still Having Problems? Keating Technologies (905) 479 0231 8:00 am - 8:00 pm EST Monday - Friday If You Need to Return Contact U.S. Robotics Customer Support. If the support representative the Modem to U.S. determines that you need to return the modem for repair or replacement, Robotics for Repair you will receive a SRO (Service Repair Order) number.
  • Page 56 4: T HAPTER ROUB LESHOOTING A ND ESOU RCES...
  • Page 57 LOSSARY 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 58 Also referred to as transmission rate. The number of binary digits, or bits, transmitted per second (bps). Communications channels using analog modems are established at set bit rates, commonly 2400, 4800, 9600, 14,400, 28,800 and higher. bits per second (bps) The bits (binary digits) per second rate.
  • Page 59 (CRC) An error-detection technique consisting of a test performed on each block or frame of data by both sending and receiving modems. The sending modem inserts the results of its tests in each data block in the form of a CRC code.
  • Page 60 Mode used by a modem when sending and receiving data files. Data Communications (or Circuit-Terminating) 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.
  • Page 61 duplex Indicates a communications channel capable of carrying signals in both directions. See half duplex, full duplex. Electronic Industries Association (EIA) Group which defines electronic standards in the U.S. error control Various techniques that check the reliability of characters (parity) or blocks of data.
  • Page 62 V.22. For 2400-bps communication, most U.S. manufacturers observe V.22 bis. LAPM Link Access Procedure for Modems. An error-control protocol defined in ITU-T recommendation V.42. Like the MNP protocols, LAPM uses cyclic redundancy checking (CRC) and retransmission of corrupted data (ARQ) to ensure data reliability.
  • Page 63 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 64 5: G HAPTER L OSSA RY parity A simple error-detection method that checks the validity of a transmitted character. Character checking has been surpassed by more reliable and efficient forms of error checking, including V.42 and MNP 2-4 protocols. Either the same type of parity must be used by two communicating computers, or both may omit parity.
  • Page 65 V.17 fax An ITU-T standard for making facsimile connections at 14,400 bps, 12,000 bps, 9600 bps, and 7200 bps. V.21 An ITU-T standard for modems operating in asynchronous mode at speeds up to 300 bps, full-duplex, on public switched telephone networks.
  • Page 66 9600 bps, with fallback to 7200 bps. V.32 An ITU-T standard for modem communications at 9600 bps and 4800 bps. V.32 modems fall back to 4800 bps when line quality is impaired. V.32 bis An ITU-T standard that extends the V.32 connection range: 4800, 7200, 9600, 12,000, and 14,400 bps.
  • Page 67 V.42 An ITU-T standard for modem communications that defines a two-stage process of detection and negotiation for LAPM error control. V.42 bis An extension of ITU-T V.42 that defines a specific data compression scheme for use during V.42 connections. V.90 The ITU-T standard for 56 Kbps modem communications.
  • Page 68 5: G HAPTER L OSSA RY Technology U.S. Robotics's trademark for its proprietary technology that 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. x2 connections require a modem with x2 technology calling a digitally connected Internet Service Provider or corporate host site compatible with x2 technology.

  • Page 69: Front-Of-The-Case Lights (External Serial Faxmodems)

    ECHNICAL Front-of-the-Case Lights (External Symbol Serial Faxmodems) EFERENCE Meaning Status Auto Answer ON when register S0 is set to mode 1 or higher (Auto Answer), and when answering a call; OFF when modem originates a call. Light flashes when there is an incoming call. Carrier Detect ON if modem receives a valid data signal (carrier) from a...

  • Page 70: Top-Of-The-Case Lights (Voice Faxmodem Pro Externals)

    6: T HAPTER EC HN ICA L EFERENC E Symbol ARQ/Error Control/FAX Top-of-the-Case Lights (Voice Light Faxmodem Pro Externals) POWER SEND RECEIVE ONLINE Typing Commands All defaults are based on the &F1*Hardware Flow Control template loaded in NVRAM when the modem is shipped. Defaults are listed in italics.
  • Page 71 <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 before connected aborts the operations. Re-executes the last issued command.
  • Page 72 6: T HAPTER EC HN ICA L EFERENC E T Tone dial (Comma) Pause. Linked to S8 register. (Semicolon) Return to Command mode after dialing. " Dials the letters that follow (in an alphabetical phone number). ! (Exclamation point) Flashes the switch hook. Delays for 125 ms.
  • Page 73 Product type Current modem settings Nonvolatile memory (NVRAM) settings Link diagnostics Product configuration Plug and Play information Extended link diagnostics Controls speaker volume (internals only). Low volume Low volume Medium volume High volume Operates speaker. Speaker always OFF. Speaker ON until CONNECT. Speaker always ON.
  • Page 74 6: T HAPTER EC HN ICA L EFERENC E Sr=n Sets register r to n. 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 Table6-1 Result Codes 0/OK 1/CONNECT 2/RING...
  • Page 75 Table6-1 Result Codes 13/CONNECT 9600 18/CONNECT 4800 20/CONNECT 7200 21/CONNECT 12000 25/CONNECT 14400 43/CONNECT 16800 85/CONNECT 19200 91/CONNECT 21600 99/CONNECT 24000 103/CONNECT 26400 107/CONNECT 28800 151/CONNECT 31200 155/CONNECT 33600 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...
  • Page 76 6: T HAPTER EC HN ICA L EFERENC E Table6-1 Result Codes 220/CONNECT 52000 224/CONNECT 53333 228/CONNECT 54666 232/CONNECT 56000 Adaptive Dialing Wait for 2nd Dial Tone Wait for Answer (@) Fast Dial *Requires @ in dial string; replaces NO CARRIER Selects power-on/reset default configuration.

  • Page 77: Extended Data Commands

    Extended Data &$ Commands &An Enables/disables added result code subsets (see Xn). &Bn Manages modem's serial port rate. &Cn Controls Carrier Detect (CD) signal. &Dn Controls Data Terminal Ready (DTR) operations. &Fn Loads a read-only (non-programmable) factory configuration. Displays a list of ampersand (&) commands. &A0 ARQ result codes disabled &A1 ARQ result codes enabled &A2 V.32 modulation indicator added...
  • Page 78 6: T HAPTER EC HN ICA L EFERENC E &F2 &Gn Sets Guard Tone. &Hn Sets Transmit Data (TD) flow control (see also &Rn). &In &Kn Enables/disables data compression. &Mn Sets Error Control (ARQ) for connections at 1200 bps and higher.
  • Page 79 &M2 Reserved &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. When used in conjunction with &Un and &Un is greater than 0, &Nn sets the ceiling connect speed.
  • Page 80 6: T HAPTER EC HN ICA L EFERENC E Note: &N17 through &N39 apply only to V.90 and V.92 products. &N15 31,200 bps &N16 33,600 bps &N17 28,000 bps &N18 29,333 bps &N19 30,666 bps &N20 32,000 bps &N21 33,333 bps &N22 34,666 bps &N23...
  • Page 81 &N37 54,666 bps &N38 56,000 bps &Pn Sets pulse (rotary) dial make/break ratio. &P0 U.S./Canada ratio, 39%/61% &P1 U.K. ratio, 33%/67% &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.
  • Page 82 6: T HAPTER EC HN ICA L EFERENC E &Un With n > 0, sets the floor connect speed (lowest acceptable connection speed). Note: If your modem cannot connect to the remote modem at or above the speed set with this command, it will hang up. Note:This default setting should be sufficient for most users.
  • Page 83 &U15 31,200 bps &U16 33,600 bps Note: &U17 through &U39 apply only to V.90 and V.92 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...
  • Page 84 6: T HAPTER EC HN ICA L EFERENC E &Wn Writes current configuration to NVRAM templates. &Yn Sets break handling. &Zn=s &Zn=L &Zn? &ZL? Table6-2 Switch Default Function &U37 54,666 bps &U38 56,000 bps &W0 Modifies the NVRAM 0 template (Y0) &W1 Modifies the NVRAM 1 template (Y1) &Y0...
  • Page 85 Table6-2 Switch Default Function OFF Verbal (word) results ON Numeric results Result Code Display OFF Suppresses result codes ON Enables result codes Command Mode Local Echo Suppression OFF Displays keyboard commands ON Suppresses echo Auto Answer Suppression OFF Modem answers on first ring, or higher if specified in NVRAM ON Disables auto answer Carrier Detect (CD) Override...

  • Page 86: S Registers

    6: T HAPTER EC HN ICA L EFERENC E S Registers Table6-3 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 87 Function Sets required duration, in tenths of a second, of remote modem's carrier signal before recognition by your 3Com U.S. Robotics modem. Sets duration, in tenths of a second, that modem waits to hang up after loss of carrier. This guard time allows your...
  • Page 88 6: T HAPTER EC HN ICA L EFERENC E Table6-3 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.
  • Page 89 Table6-3 Register Default S35-S37 S39-S40 S Registers Function Default item, all times are in tenths of seconds. Disables all connections except V.32 at 9600 bps. Sets the duration, in tenths of a second, of the V.21 answer mode fallback timer. Reserved Reserved Bit-mapped register setup.

  • Page 90: Bit-Mapped Registers

    6: T HAPTER EC HN ICA L EFERENC E Bit-Mapped To set a bit-mapped register, select the bit(s) you want on and set the Registers register (for example, 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). Table6-4 Settings for S13 Bit Value Result Table6-5 Settings for S15...
  • Page 91 (default Bell 103). Enables unencoded (non-trellis coded) modulation in V.32 mode. Disables V.32 modulation. Disables 2100 Hz answer tone to allow two V.42 modems to connect faster. Enables V.23 fallback mode. Disables V.32bis mode. Disable V.42 selective reject. Software compatibility mode.
  • Page 92 6: T HAPTER EC HN ICA L EFERENC E Table6-7 Settings for S32 Bit Value Results Table6-8 Settings for S33 Bit Value Results Table6-9 Settings for S41 Bit Value Results V.8 Call Indicate enabled. Enables V.8 mode. Reserved. Disable V.34 modulation. Disable V.34+ modulation.
  • Page 93 Table6-9 Settings for S41 Bit Value Results Reserved. Reserved. Reserved. Reserved. Bit-Mapped Registers...
  • Page 94 6: T HAPTER EC HN ICA L EFERENC E...

  • Page 95: Manufacturer's Declaration Of Conformity

    Manufacturer's We declare under our sole responsibility that this product (56K Declaration of Faxmodem) to which this declaration relates, is in conformity with the Conformity following standards or more normative documents: ANSI C63.4-1992 Methods of Measurement Federal Communications Commission 47 CFR part 15, subpart B 15.107 (e) Class B conducted limits 15.109 (g) Class B Radiated Emissions Limits U.S.

  • Page 96: Caution To The User

    7: R HAPTER EGUL ATORY NF ORMA TION (2) this device must accept any interference received including interference that may cause undesired operations. Caution to the User The user is cautioned that any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

  • Page 97: Radio And Television Interference

    Caution to the User To avoid the risk of electrical shock, disconnect the phone cord from the modem and unplug the power to the computer before removing the cover. 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 98 7: R HAPTER EGUL ATORY NF ORMA TION allowed to be connected to a telephone interface. The termination on an interface may consist of any combination of devices subject only to the requirement that the sum of the Ringer Equivalence Numbers of all devices does not exceed 5.
  • Page 99 For Canadian Modem Users exigences techniques relatives au matériel terminal. Le Ministère n'assure toutefois pas que le matériel fonctionnera à la satisfaction de l'utilisateur. Avant d'installer ce matériel, l'utilisateur doit s'assurer qu'il est permis de le raccorder aux installations de l'entreprise locale de télécommunication. Le matériel doit également être installé...
  • Page 100 7: R HAPTER EGUL ATORY NF ORMA TION...

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