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http://www.usr.com/U.S. Robotics® Modems:User’s GuidePublished September 2000

4 CHAPTER 1: 56K FAXMODEM PRODUCT FEATURES

94 CHAPTER 7: REGULATORY INFORMATION

2INTERNAL AND EXTERNAL MODEMS WITH SPEAKERPHONEMaking a Speakerphone Call with a TelephoneExternal Modems with Speakerphone1 Make sure your telephone

6 CHAPTER 2: INTERNAL AND EXTERNAL MODEMS WITH SPEAKERPHONEIf you do not hear your phone ring, you may not have the telephone's cord plugged into

3UNINSTALLING A U.S. ROBOTICS® MODEMNOTE: These instructions only apply to current U.S. Robotics modems. If the modem you'll be uninstalling was

8 CHAPTER 3: UNINSTALLING A U.S. ROBOTICS® MODEM8 Shut down Windows and turn off your computer.9 Remove the phone cords from the modem's TELCO an

Uninstalling an External Faxmodem 99 Remove the screw that attaches the modem's metal bracket to the computer.10 Remove the modem from its slot.1

10 CHAPTER 3: UNINSTALLING A U.S. ROBOTICS® MODEM

4TROUBLESHOOTING AND HELP RESOURCESThis chapter covers: External Serial Modems External USB Modems Macintosh Modems Internal Winmodem® modems In

12 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESwith this modem. Depending on whether you have a 9-pin or 25-pin serial port on your computer, you wil

External Serial Modems 13tab. Look for another modem already in the machine. If there is another modem listed, check which COM port it is using. If a

U.S. Robotics Corporation3800 Golf Rd.Rolling Meadows, IL60008Copyright © 2000 U.S. Robotics Corporation. All rights reserved. No part of this documen

14 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESWindows NTClick Windows Start, Settings, and then Control Panel. Double-click Ports. Make sure the por

External Serial Modems 15your modem is not properly installed. Try reinstalling your modem using the instructions on the Installation Guide.Windows 95

16 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESPossible solution:You might have a bad phone cord connection to your modem, or your phone cord may be

External Serial Modems 17My modem isn'tachieving a 56KInternet connection.Possible solution: Our research has shown that the vast majority of tel

18 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCES4. For a V.92 connection, your modem must be connecting to a V.92 server. A pair of 56K modems will no

External USB Modems 19You need a DB25F/DB25M RS-232 serial cable.USB A to B cableNOTE: You should NOT attempt to connect or use your modem with both t

20 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESsuch as a Null Modem cable, that will not work correctly with this modem. If You Are Using ThisModem a

External USB Modems 21Possible solution: If the modem has worked previously and you removed the USB cable from the computer and then reattached it, tr

22 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESCOM Ports have yellow exclamation points or red Xs over them, your COM ports may be configured incorre

External USB Modems 23your modem is not properly installed. Try reinstalling your modem using the instructions on the Installation Guide.Windows 95/98

CONTENTS1 56K FAXMODEM PRODUCT FEATURESModulation Schemes1Error Control and Data Compression Schemes2Fax Modulation Schemes2Front Channel Link Rates (

24 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESbe plugged into the jack labelled on the modem and into the wall phone jack. Use the phone cord inclu

Macintosh Modems 25configurations, some users will not be able to take full advantage of V.90 technology at this time. In order to achieve a V.90 conn

26 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESpanel will be on. If they are not, check your outlet with another electrical device to be sure you are

Macintosh Modems 27modem. Make sure it is connected to the modem port on the back of your computer and not the printer port.My software isn'treco

28 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESphone jack. Use the phone cord included in your modem's box if possible.Possible solution:You may

Macintosh Modems 29My modem isn’tachieving a 56KInternet connection.Possible solution: Note: U.S. Robotics 56K modems are capable of receiving downloa

30 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESInternal Winmodem® Modems(Model Numbers 3CP5699A, 3CPxx5699A, 3CP5695, 3CPxx5695, and 3CPxx2884A)Basic

Internal Winmodem® Modems 31Manager button. Look under Ports (COM & LPT). If the COM Ports have yellow exclamation points or red Xs over them, you

32 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESon your system. We highly recommend using the communications software provided with your modem either

Internal Winmodem® Modems 33Try reinstalling your modem using the instructions on the Installation Guide.My modem won’tdial out or doesn’tanswer incom

Uninstalling an External Faxmodem9Uninstalling a Macintosh Faxmodem94 TROUBLESHOOTING AND HELP RESOURCESExternal Serial Modems11Basic Troubleshooting

34 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESMy modem isn’tachieving a 56KInternet connection.Possible solution: Note: U.S. Robotics 56K modems are

Internal ISA Modems 35Internal ISA ModemsBasic TroubleshootingSteps1. Make sure that your phone cord is properly connected. Remove the phone cord from

36 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESIf Windows still fails to recognize your modem and it does not have a yellow exclamation point next to

Internal ISA Modems 37Possible solution: You may be using a COM port address that is either already in use or not configured correctly. To work proper

38 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESMy software isn’trecognizing mymodem.Possible solution: Your communications software may not function

Internal ISA Modems 39Possible solution: Windows 2000If you are using Dial-Up Networking, it may not be configured correctly. Check your configuration

40 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESVoice Mail Users Possible solution:If you have voice mail provided by your local phone company, your d

Internal PCI Modems 41should try making your 56K connection several times. One way to test this is to dial into a long distance location. Long distanc

42 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESLocate your modem in the list of devices. If a yellow exclamation point appears over the modem’s descr

Internal PCI Modems 43an IRQ for use by your modem. Refer to that device's documentation for more information about removing, disabling, or reloc

Basic Troubleshooting Steps30My computer isn’t recognizing my modem.30My software isn’t recognizing my modem.31My modem won’t dial out or doesn’t answ

44 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESCOM ports may be configured incorrectly. If this is the case, you may need to contact your computer ma

Internal PCI Modems 45the properties of modems from this window. The U.S. Robotics modem you have installed should be present in the list of installed

46 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESOffice Users Possible solution:You may have plugged your modem's phone cord into a digital line.

Help Resources 47analog-to-digital conversion. The 56K signal from your ISP begins as a digital signal. Somewhere between the ISP and your modem, ther

48 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCESAre You Still Having Problems?1 Review this manual.2 Call or visit your modem dealer. Your dealer may

Are You Still Having Problems? 49Keating Technologies(905) 479 02318:00 am - 8:00 pm EST Monday - FridayIf You Need to Returnthe Modem to U.S.Robotics

50 CHAPTER 4: TROUBLESHOOTING AND HELP RESOURCES

5GLOSSARYanalog loopbackA modem self-test in which data from the keyboard or an internal test pattern is sent to the modem's transmitter, turned

52 CHAPTER 5: GLOSSARYasynchronous transmissionData transmission in which the length of time between transmitted characters may vary. Because characte

53bufferA temporary memory area used as storage during input and output operations. An example is the modem's command buffer.byteA group of binar

In Canada:495 GLOSSARY6 TECHNICAL REFERENCEFront-of-the-Case Lights (External Serial Faxmodems)63Top-of-the-Case Lights (Voice Faxmodem Pro Externals)

54 CHAPTER 5: GLOSSARYdata communicationsThe transmission or sharing of data between computers via an electronic medium.data compression tableA table

55duplexIndicates a communications channel capable of carrying signals in both directions. See half duplex, full duplex.Electronic Industries Associat

56 CHAPTER 5: GLOSSARYhalf duplexSignals can flow in both directions, but only one way at a time. In microcomputer communications, may refer to activa

57MNPMicrocom Networking Protocol, an error-control protocol developed by Microcom, Inc., and now in the public domain. There are several different MN

58 CHAPTER 5: GLOSSARYparityA simple error-detection method that checks the validity of a transmitted character. Character checking has been surpassed

59start/stop bitsThe signaling bits attached to a character before and after the character is transmitted during asynchronous transmission.terminalA d

60 CHAPTER 5: GLOSSARYV.22An ITU-T standard for modem communications at 1200 bps, compatible with the Bell 212A standard observed in the U.S. and Cana

61V.42An ITU-T standard for modem communications that defines a two-stage process of detection and negotiation for LAPM error control.V.42 bisAn exten

62 CHAPTER 5: GLOSSARYx2TM TechnologyU.S. Robotics's trademark for its proprietary technology that uses the digital telephone network to increase

6TECHNICAL REFERENCEFront-of-the-Case Lights (External Serial Faxmodems)Symbol Meaning StatusAA Auto Answer modeON when register S0 is set to 1 or hig

156K FAXMODEM PRODUCT FEATURESModulation SchemesITU-T V.92sITU-T V.90*x2TM technology*ITU-T V.34+ITU-T V.34ITU-T V.32bisITU-T V.32ITU-T V.22bisITU-T V

64 CHAPTER 6: TECHNICAL REFERENCETop-of-the-Case Lights (Voice Faxmodem Pro Externals)Typing Commands Type commands in either upper or lower case, no

Basic Data Commands 65<control key>C or <control key>KStop help screens.$ Use in conjunction with D, S, or & commands (or just AT) to

66 CHAPTER 6: TECHNICAL REFERENCET Tone dial, (Comma) Pause. Linked to S8 register.; (Semicolon) Return to Command mode after dialing." Dials the

Basic Data Commands 67I3 Product typeI4 Current modem settingsI5 Nonvolatile memory (NVRAM) settingsI6 Link diagnosticsI7 Product configurationI9 Plug

68 CHAPTER 6: TECHNICAL REFERENCEQ0 Displays result codes.Q1 Quiet mode; no result codes.Q2 Displays result codes only in Originate mode.Sr=n Sets re

Basic Data Commands 6913/CONNECT 9600* * * *18/CONNECT 4800* * * *20/CONNECT 7200 * * * *21/CONNECT 12000* * * *25/CONNECT 14400 * * * *43/CONNECT 16

70 CHAPTER 6: TECHNICAL REFERENCE*Requires @ in dial string; replaces NO CARRIERYn Selects power-on/reset default configuration.Y0 Use profile 0 setti

Extended Data Commands 71Extended Data Commands&$ Displays a list of ampersand (&) commands.&An Enables/disables added result code subsets

72 CHAPTER 6: TECHNICAL REFERENCE&F2 Software flow control template&Gn Sets Guard Tone.&G0 No guard tone, U.S. and Canada&G1 550 Hz g

Extended Data Commands 73&M2 Reserved &M3 Reserved&M4 Normal/ARQ&M5 ARQ mode&Nn Sets connect speed. If connection cannot be made

2 CHAPTER 1: 56K FAXMODEM PRODUCT FEATURESError Control and Data Compression SchemesITU-T V.42ITU-T V.42bisMNP 2-5Fax Modulation SchemesITU-T V.17ITU-

74 CHAPTER 6: TECHNICAL REFERENCE&N15 31,200 bps&N16 33,600 bpsNote: &N17 through &N39 apply only to V.90 and V.92 products.&N17 2

Extended Data Commands 75&N37 54,666 bps&N38 56,000 bps&Pn Sets pulse (rotary) dial make/break ratio.&P0 U.S./Canada ratio, 39%/61%&am

76 CHAPTER 6: TECHNICAL REFERENCE&Un With n > 0, sets the floor connect speed (lowest acceptable connection speed). Note: If your modem cannot

Extended Data Commands 77&U15 31,200 bps&U16 33,600 bps Note: &U17 through &U39 apply only to V.90 and V.92 products.&U17 28,000

78 CHAPTER 6: TECHNICAL REFERENCE&U37 54,666 bps&U38 56,000 bps&Wn Writes current configuration to NVRAM templates.&W0 Modifies the NV

Extended Data Commands 79OFF Verbal (word) resultsON Numeric results3 ON Result Code DisplayOFF Suppresses result codesON Enables result codes4 OFF Co

80 CHAPTER 6: TECHNICAL REFERENCES RegistersTable6-3 Register Default FunctionS0 0 Sets number of rings on which to answer in Auto Answer mode. Whe

S Registers 81S9 6 Sets required duration, in tenths of a second, of remote modem's carrier signal before recognition by your 3Com U.S. Robotics

82 CHAPTER 6: TECHNICAL REFERENCES18 0 Test timer for &T loopback testing. Sets the time in seconds of testing before the modem automatically time

S Registers 838 Default item, all times are in tenths of seconds.255 Disables all connections except V.32 at 9600 bps.S29 20 Sets the duration, in ten

V.32bis Link Rates 3V.32bis Link Rates 4800, 7200, 9600, 12000, 14400Additional Link Rates300, 1200/75 (V.23), 1200, 2400Fax Link Rates 2400, 4800, 72

84 CHAPTER 6: TECHNICAL REFERENCEBit-Mapped RegistersTo set a bit-mapped register, select the bit(s) you want on and set the register (for example, S1

Bit-Mapped Registers 857 128 Disable V.42 operation.Note:To disable V.42 detect phase, select sum of bits 3 and 7 (in other words S15 = 136 [8 + 128])

86 CHAPTER 6: TECHNICAL REFERENCE Table6-7 Settings for S32Bit Value Results0 1 V.8 Call Indicate enabled.1 2 Enables V.8 mode.2 4 Reserved.3 8 Disa

Bit-Mapped Registers 874 16 Reserved.5 32 Reserved.6 64 Reserved.7 128 Reserved.Table6-9 Settings for S41Bit Value Results

88 CHAPTER 6: TECHNICAL REFERENCE

7REGULATORY INFORMATIONManufacturer's Declaration of ConformityWe declare under our sole responsibility that this product (56K Faxmodem) to which

90 CHAPTER 7: REGULATORY INFORMATION(2) this device must accept any interference received including interference that may cause undesired operations.C

Caution to the User 91Caution to the User To avoid the risk of electrical shock, disconnect the phone cord from the modem and unplug the power to the

92 CHAPTER 7: REGULATORY INFORMATIONallowed to be connected to a telephone interface. The termination on an interface may consist of any combination o

For Canadian Modem Users 93exigences techniques relatives au matériel terminal. Le Ministère n'assure toutefois pas que le matériel fonctionnera