Usrobotics V.34 Manual de usuario Pagina 1

COURIERHIGH SPEED MODEMCourier V.34 Dual Standard FaxUSER MANUAL

COURIER HIGH SPEED MODEMSx Warranty InformationFCC REGISTRATION FCC68: CJEUSA-73130-FA-ERINGER EQUIVALENCE: 0.4BFCC15:CJE-0263 (External modem)C

COURIER HIGH SPEED MODEMSB-6 Summaries and TablesSymbol Meaning StatusMR Modem Ready/ ON when the Courier is powered on. Test Mode Flashes when

COURIER HIGH SPEED MODEMSSummaries and Tables B-7DIP SWITCH SUMMARYPURPOSEThe DIP switches, located at the rear of the modem, are foradapting the m

COURIER HIGH SPEED MODEMSB-8 Summaries and TablesFactory Switch Setting Function3 ON Result Code DisplayOFF Results suppressedON Results enabled4 O

COURIER HIGH SPEED MODEMSSummaries and Tables B-9DEFAULT SETTINGSUSER-PROGRAMMABLE DEFAULTSYou can create your own default configuration and store

COURIER HIGH SPEED MODEMSB-10 Summaries and TablesTable B.3&F1 Hardware Flow Control Default TemplateNVRAM Options Setting DescriptionHandsha

COURIER HIGH SPEED MODEMSSummaries and Tables B-11The &F2 and &F3 factory setting templates are similar to the&F1, with the exception o

COURIER HIGH SPEED MODEMSB-12 Summaries and TablesTable B.5&F3 HST Cellular TemplateNVRAM Options Setting DescriptionHandshake option B1 HST-

COURIER HIGH SPEED MODEMSSummaries and Tables B-13If DIP switch 10 is ON when the modem is powered on, or youload factory template 0 (&F0), the

COURIER HIGH SPEED MODEMSB-14 Summaries and TablesTable B.7NVRAM OptionsFactoryNVRAM S-Register Options SettingS0 Auto Answer 1S2 Escape code ch

COURIER HIGH SPEED MODEMSSummaries and Tables B-15S-REGISTER SUMMARYUSAGEThe default values are those users typically require. Change thesettings

COURIER HIGH SPEED MODEMSRegulatory Information xi15 of FCC rules, which are designed to provide reasonableprotection against such interference in

COURIER HIGH SPEED MODEMSB-16 Summaries and TablesRegister Default FunctionS0 See DIP Sets the number of rings on which toSwitch 5 answer when in

COURIER HIGH SPEED MODEMSSummaries and Tables B-17Register Default FunctionS8 2 Sets the duration, in seconds, for the pause(,) option in the Dia

COURIER HIGH SPEED MODEMSB-18 Summaries and TablesRegister Default FunctionS13 0 Bit-mapped register. Select the bit(s) youwant on and set S13 t

COURIER HIGH SPEED MODEMSSummaries and Tables B-19Register Default FunctionS15 0 Bit-mapped register. To set the register,see the instructions f

COURIER HIGH SPEED MODEMSB-20 Summaries and TablesRegister Default FunctionS16 0 Bit-mapped test register. To set theregister, see the instructi

COURIER HIGH SPEED MODEMSSummaries and Tables B-21Register Default FunctionS24 150 Sets the duration, in 20-millisecond units,between pulsed DSR

COURIER HIGH SPEED MODEMSB-22 Summaries and TablesRegister Default Function7 128 Unusual software incompati-bility. Some software may notaccept

COURIER HIGH SPEED MODEMSSummaries and Tables B-23Register Default FunctionSetting S28 to zero eliminates the extratones, resulting in a faster c

COURIER HIGH SPEED MODEMSB-24 Summaries and TablesRegister Default FunctionS33 0 Setting this register to 1 (S33=1) enables areduced packet size.

COURIER HIGH SPEED MODEMSSummaries and Tables B-25Register Default FunctionS39−S40 0 Reserved.S41 0 Sets the number of allowable remoteaccess log

COURIER HIGH SPEED MODEMSxii Regulatory Informationcompliance with the above conditions may not preventdegradation of service in some situations.Re

COURIER HIGH SPEED MODEMSB-26 Summaries and TablesRegister Default FunctionS51 0 Bit-mapped register. See instructionsfor S13.Bit Value Result0

COURIER HIGH SPEED MODEMSSummaries and Tables B-27Register Default FunctionS53 0 Bit-mapped register. Select the DialSecurity features you want

COURIER HIGH SPEED MODEMSB-28 Summaries and TablesRegister Default FunctionS55 0 Trellis code bit-mapped register usedprimarily by U.S.Robotics T

COURIER HIGH SPEED MODEMSAlphabetical Command Summary C-1APPENDIX C. ALPHABETICAL COMMAND SUMMARYAdditional command summaries are in Chapter 4, on

COURIER HIGH SPEED MODEMSC-2 Alphabetical Command SummaryExample (spaces are not required, but are added here forreadability):AT &K3 X2 DT 071

COURIER HIGH SPEED MODEMSAlphabetical Command Summary C-3DIP Switch 9 Response to +++OFF Modem goes on hook (hangs up), sends NOCARRIER result code

COURIER HIGH SPEED MODEMSC-4 Alphabetical Command SummaryBn Handshake options for international calls above 1200 bps.B0 ITU-T (formerly CCITT) answ

COURIER HIGH SPEED MODEMSAlphabetical Command Summary C-5@ Wait for an answer (with X3 or higher). The @ commandcan be used in the Dial string to

COURIER HIGH SPEED MODEMSC-6 Alphabetical Command SummaryIn InquiryI0 Display product codeI1 Display results from ROM checksumI2 Display results fr

COURIER HIGH SPEED MODEMSAlphabetical Command Summary C-7Mn Speaker (audio monitor).M0 The speaker is always OFF.M1 The speaker is ON until carrier

COURIER HIGH SPEED MODEMSFeatures and Compatibility 1-1CHAPTER 1. FEATURES AND COMPATIBILITYINTRODUCTIONCongratulations! The Courier modem you&ap

COURIER HIGH SPEED MODEMSC-8 Alphabetical Command SummaryXn Result code set options. Use the following table (Default = X7,all codes except 12/VOI

COURIER HIGH SPEED MODEMSAlphabetical Command Summary C-9AMPERSAND (&) COMMAND SET&An Enable/disable additional result code subsets. See t

COURIER HIGH SPEED MODEMSC-10 Alphabetical Command Summary&Dn Data Terminal Ready (DTR) operations. At power-on and reset,the modem operates a

COURIER HIGH SPEED MODEMSAlphabetical Command Summary C-11&Gn This setting applies only to overseas calls at 2400 or 1200 bps.British phone swi

COURIER HIGH SPEED MODEMSC-12 Alphabetical Command Summary&I2 The Courier acts on your XON/XOFF commands, butremoves them from the data stream

COURIER HIGH SPEED MODEMSAlphabetical Command Summary C-13&M1 This setting is exclusive of the modems' error control andis used only for o

COURIER HIGH SPEED MODEMSC-14 Alphabetical Command SummaryThe options are as follows.&N1 300 bps &N9 16.8K bps (HST, terbo,&N2 1200 bps

COURIER HIGH SPEED MODEMSAlphabetical Command Summary C-15&S2 This option is for specialized equipment such asautomatic callback units. On los

COURIER HIGH SPEED MODEMSC-16 Alphabetical Command Summary&X1 The DTE is the source of the Transmit clock timingsignals and sends them to the C

COURIER HIGH SPEED MODEMSAlphabetical Command Summary C-17The function of the voice/data switch is determined by the set-ting of Register S32, as d

COURIER HIGH SPEED MODEMS1-2 Features and CompatibilityUniversal ConnectCourier high speed modems automatically detect and connectat the fastest av

COURIER HIGH SPEED MODEMSC-18 Alphabetical Command SummaryPERCENT COMMAND SET%An Create and configure security accounts. See Appendix D.%Bn Remote

COURIER HIGH SPEED MODEMSAlphabetical Command Summary C-19%E=4 Erase phone numbers in accounts 0−9.%E=5 Disable Account, Dialback, and New Number f

COURIER HIGH SPEED MODEMSC-20 Alphabetical Command Summary%T Enables the modem, when off hook, to detect the tonefrequencies of dialing modems. %T

COURIER HIGH SPEED MODEMSDial Security D-1APPENDIX D. DIAL SECURITY ANDREMOTE ACCESS OPERATIONSDial Security is designed to protect networks and d

COURIER HIGH SPEED MODEMSD-2 Dial SecurityOVERVIEWThe Courier’s Dial Security allows you to configure up to 10Security accounts. Each security acc

COURIER HIGH SPEED MODEMSDial Security D-3If the password is valid, a secure connection is completed.If the password is invalid, the host modem pro

COURIER HIGH SPEED MODEMSD-4 Dial SecuritySET UP YOUR SECURITY ACCOUNTSecurity accounts are set up via an AT command line structure,rather than a s

COURIER HIGH SPEED MODEMSDial Security D-5Each security function can be configured or modifiedindependently. If a field is to remain as is, just i

COURIER HIGH SPEED MODEMSD-6 Dial Security1. Register S53 is the bit-mapped register used to enable DialSecurity. The &W command must be used

COURIER HIGH SPEED MODEMSDial Security D-7MAINTAIN SECURITY ACCOUNTSOnce the local access password is set and protected, the systemadministrator is

COURIER HIGH SPEED MODEMSFeatures and Compatibility 1-3Flow Control/Variable Serial Port RatesFlow control, required under error control, also allo

COURIER HIGH SPEED MODEMSD-8 Dial SecurityErasing Account Information (%E)Use the %E=n command to make system edits.%E=1 Erase local access passwor

COURIER HIGH SPEED MODEMSDial Security D-9Then assign the password as your autopass password.Enter the following command, where n is the number of

COURIER HIGH SPEED MODEMSD-10 Remote AccessREMOTE ACCESS OPERATIONSYou can set a Courier modem so that someone at a remotelocation can configure yo

COURIER HIGH SPEED MODEMSRemote Access D-11To assign a password that allows viewing privileges only, usethe command format below:AT%P0=[password] &

COURIER HIGH SPEED MODEMSD-12 Remote AccessAT THE REMOTE MODEM SITERemote configuration can be performed at any time during anasynchronous connecti

COURIER HIGH SPEED MODEMSRemote Access D-13As mentioned earlier, if the number of unsuccessful loginattempts exceeds the set limit, the modem retur

COURIER HIGH SPEED MODEMSD-14 Remote AccessWhen you make remote configuration changes, the remoteprompt is altered to indicate that changes have be

COURIER HIGH SPEED MODEMSRemote Access D-15%C1 Restore configuration. Use this command tocancel any configuration changes made duringremote access

COURIER HIGH SPEED MODEMSD-16 Remote AccessCommand FormatWhen typing commands during the remote access session, nodelay between command strings is

COURIER HIGH SPEED MODEMSRemote Access D-172. When remote access has been granted, use the %S=command to access the Dial Security accounts.3. If yo

COURIER HIGH SPEED MODEMS1-4 Features and CompatibilityProgrammable Nonvolatile MemoryYou can tailor your own default settings and store them in no

COURIER HIGH SPEED MODEMSTroubleshooting E-1APPENDIX E. TROUBLESHOOTINGYou may occasionally encounter one of the problems listed here.They are div

COURIER HIGH SPEED MODEMSE-2 Troubleshooting3. Check to see that your terminal or software is set to thecorrect bit rate and word length (7 bits wi

COURIER HIGH SPEED MODEMSTroubleshooting E-3When the modem is in Answer mode, it acts as though a CarriageReturn has been entered, but nothing has

COURIER HIGH SPEED MODEMSE-4 Troubleshooting6. Make sure your modem's connection rate setting, &Nn iscorrect for the call. If the connect

COURIER HIGH SPEED MODEMSTroubleshooting E-52. If you use memory-resident programs (TSRs), they may beinterfering. Try disabling them before you r

COURIER HIGH SPEED MODEMSE-6 Troubleshooting5. If you do return the modem to us, please use the followingprocedures.a. Ship the unit, postage paid,

COURIER HIGH SPEED MODEMSSynchronous Operations F-1APPENDIX F. SYNCHRONOUS ANDDEDICATED AND LEASED LINE OPERATIONSSYNCHRONOUS APPLICATIONSSynchron

COURIER HIGH SPEED MODEMSF-2 Synchronous OperationsNOTE: The term DTE in the following discussion means DataTerminal Equipment, the end-to-end equ

COURIER HIGH SPEED MODEMSSynchronous Operations F-3Data Rate Synchronization (&Xn)During synchronous operations, transmit and receive clocks at

COURIER HIGH SPEED MODEMSF-4 Synchronous OperationsV.25 BIS REQUIREMENTSV.25 bis is an ITU-T standard that uses the HDLC or character-oriented prot

COURIER HIGH SPEED MODEMSFeatures and Compatibility 1-5Modem Settings DisplaysOn command, the modem displays its current settings, a handyway to ch

COURIER HIGH SPEED MODEMSSynchronous Operations F-5Offline Host/Modem Clock SpeedThe second phase involves the data rate between the hostcomputer o

COURIER HIGH SPEED MODEMSF-6 Synchronous OperationsRecommended SettingsWhen the connection is made and the data rate is determined,host/modem rates

COURIER HIGH SPEED MODEMSSynchronous Operations F-7The Courier and the remote modem must use the sameeight-bit data format. The character length m

COURIER HIGH SPEED MODEMSF-8 Synchronous OperationsDial Options0−9 Digits& Flash: Wait for dial tone> (Greater Than) separator< Pause= (E

COURIER HIGH SPEED MODEMSSynchronous Operations F-9Commands and Result Codes NOT Supported• CRI (Call request with identification number)• PRI (Pro

COURIER HIGH SPEED MODEMSF-10 Synchronous OperationsThe Synchronous Adapter CardYou will probably have to purchase and install a synchronousadapter

COURIER HIGH SPEED MODEMSSynchronous Operations F-11Modulation/Connection Rate (Bn, &Nn)Use the following guidelines for your Courier type. V.

COURIER HIGH SPEED MODEMSF-12 Synchronous OperationsThe fixed rate options are as follows:&N0 Variable rate &N6 9600 bps&N1 Reserve

COURIER HIGH SPEED MODEMSSynchronous Operations F-133. Set the voice/data switch to option 9, so that the modemexecutes the stored command string w

COURIER HIGH SPEED MODEMSF-14 Synchronous OperationsHanging UpThe modem remains online until the remote modem disconnectsor your software causes th

COURIER HIGH SPEED MODEMS1-6 Features and CompatibilityCOMPATIBILITYThe Courier adheres to the following modulation schemes andstandards, ensuring

COURIER HIGH SPEED MODEMSDedicated and Leased Line Operations F-15DEDICATED AND LEASED LINE OPERATIONSThe following operations apply in installatio

COURIER HIGH SPEED MODEMSF-16 Dedicated and Leased Line OperationsSet the modem as follows:1. Set your terminal or communications software to the r

COURIER HIGH SPEED MODEMSDedicated and Leased Line Operations F-173. Set the modem to load NVRAM settings at power-on, DIPswitch 10 OFF. It does n

COURIER HIGH SPEED MODEMSAdditional Operations G-1APPENDIX G. ADDITIONAL OPERATIONSCONTENTSHST CellularVoice/Data (External Modems Only)Hewlett P

COURIER HIGH SPEED MODEMSG-2 Additional OperationsCELLULAR OPERATIONSThis function applies to Dual Standard HSTs only. HST cellularmodems can be

COURIER HIGH SPEED MODEMSAdditional Operations G-3The modem uses the U.S. Robotics proprietary HST cellularprotocol to make connections. The call

COURIER HIGH SPEED MODEMSG-4 Additional OperationsVOICE/DATA (EXTERNAL MODEMS ONLY)The voice/data switch is located on the modem's front pane

COURIER HIGH SPEED MODEMSAdditional Operations G-5Voice/Data SwitchS32=1, S32=21. Phone the other user to establish the bit rate, parity, wordlen

COURIER HIGH SPEED MODEMSG-6 Additional OperationsSoftware CommandsATD, ATAIf your voice/data switch is set for a function other thanvoice/data o

COURIER HIGH SPEED MODEMSAdditional Operations G-7ALLOWABLE VOICE/DATA SWITCH FUNCTIONSUse Register S32 to set the voice/data switch for the funct

COURIER HIGH SPEED MODEMSFeatures and Compatibility 1-7MNP Levels 2, 3 and 4 error control, level 5 datacompression, 1200 bps and higherITU-T V.54

COURIER HIGH SPEED MODEMSG-8 Additional OperationsHEWLETT PACKARD INSTALLATIONSDuring error control connections, the Courier recognizes theASCII E

COURIER HIGH SPEED MODEMSAdditional Operations G-9MI/MIC OPERATIONS (EXTERNAL MODEMS ONLY)DESCRIPTIONMode Indicate/Mode Indicate Common (MI/MIC) c

COURIER HIGH SPEED MODEMSG-10 Additional Operations6. Locate the voice/data switch at the front of the modem.Lift up and remove the modem (printed

COURIER HIGH SPEED MODEMSAdditional Operations G-1110. Connect the modem's RS-232, power and phone cables, inthat order (see chapter 2). Be

COURIER HIGH SPEED MODEMSG-12 Additional Operations2. Replace the modem in the case top: ease the voice/dataswitch into the opening in the front

COURIER HIGH SPEED MODEMSModem Testing H-1APPENDIX H. MODEM TESTINGTesting is available with the &T command or Register S16. Allloopback test

COURIER HIGH SPEED MODEMSH-2 Modem TestingANALOG LOOPBACK&T1, &T8This test checks the operation of the modem's transmitter andreceive

COURIER HIGH SPEED MODEMSModem Testing H-34. Type recognizable data so that you can verify it when it islooped back to the screen.5. End the test.

COURIER HIGH SPEED MODEMSH-4 Modem Testing3. Send the modem the following command:AT &M0 &T8 <Enter>The modem disables error control

COURIER HIGH SPEED MODEMSModem Testing H-5NOTE: This test requires the modem to establish a connectionand return to online-command mode in respons

COURIER HIGH SPEED MODEMSii How to Use This ManualHOW TO USE THIS MANUALThis manual contains operating instructions for Courier DualStandard V.34 a

COURIER HIGH SPEED MODEMSExternal Modem Set Up 2-1 CHAPTER 2. MODEM SET UPHS AA CD OH RD SD TR MR RS CS SYN ARQ/FAXVOICE/DATAV.34 Fax withV.FC a

COURIER HIGH SPEED MODEMSH-6 Modem TestingREMOTE DIGITAL LOOPBACK&T6, &T7This test, like the local digital loopback test, verifies thecond

COURIER HIGH SPEED MODEMSModem Testing H-72. Bring the Modem back to Command mode with the +++escape code. Send it the AT&T6 command. The mod

COURIER HIGH SPEED MODEMSH-8 Modem Testing2. Bring the modem back to Command mode with the +++escape code. Then send it the AT&T7 command. Th

COURIER HIGH SPEED MODEMSModem Testing H-9NOTE: Earlier U.S. Robotics modems require bit 3 to beenabled in order to grant RDL to a remote modem.

COURIER HIGH SPEED MODEMSH-10 Modem TestingTEST PATTERNS16=4The test pattern can be used instead of your typed data duringAnalog Loopback (AL) or

COURIER HIGH SPEED MODEMSModem Testing H-11Initiating Modem1. If DIP switch 9 is OFF, set it ON so that it does not hang upon receipt of the +++ es

COURIER HIGH SPEED MODEMSH-12 Modem TestingKeep in mind, however, that error control is disabled.Because error control is negotiated during the con

COURIER HIGH SPEED MODEMSSoftware Upgrades I-1APPENDIX I. SOFTWARE UPGRADESThe Courier V.34 modem is software upgradable. You candownload upgrades

COURIER HIGH SPEED MODEMSI-2 Software Upgrades5. Answer the download prompts according to your systemrequirements. The file will be downloaded to

COURIER HIGH SPEED MODEMSSoftware Upgrades I-3/b=n Enter this command to specify the bit rate at whichthe COM port will communicate with the modem.

COURIER HIGH SPEED MODEMS2-2 External Modem Set UpVolume ControlThis is a slide switch underneath the right side panel of themodem, near the front

COURIER HIGH SPEED MODEMSGlossary J-1APPENDIX J. GLOSSARYCross-references in the following definitions are printed in boldface.Adaptive Speed Leve

COURIER HIGH SPEED MODEMSJ-2 GlossaryASCIIAmerican Standard Code for Information Interchange. A 7-bitbinary code (0's, 1's) used to repr

COURIER HIGH SPEED MODEMSGlossary J-3BisyncBinary Synchronous Control. An earlier protocol developed byIBM for software applications and communicat

COURIER HIGH SPEED MODEMSJ-4 GlossaryCarrierA continuous frequency capable of being either modulated orimpressed with another information-carrying

COURIER HIGH SPEED MODEMSGlossary J-5Cyclic Redundancy Checking (CRC)An error-detection technique consisting of a cyclic algorithmperformed on each

COURIER HIGH SPEED MODEMSJ-6 GlossaryDedicated LineA user-installed telephone line used to connect a specified num-ber of computers or terminals wi

COURIER HIGH SPEED MODEMSGlossary J-7Error ControlVarious techniques which check the reliability of characters(parity) or blocks of data. V.42, MNP

COURIER HIGH SPEED MODEMSJ-8 GlossaryHDLCHigh Level Data Link Control. A standard protocol developedby the International Standards Organization fo

COURIER HIGH SPEED MODEMSGlossary J-9Local EchoA modem feature that enables the modem to send copies of key-board commands and transmitted data to t

COURIER HIGH SPEED MODEMSJ-10 GlossaryNonvolatile Memory (NVRAM)User-programmable random access memory whose data isretained when modem power is tu

COURIER HIGH SPEED MODEMSExternal Modem Set Up 2-3• If your machine has other than a 25- or 9-pin port, checkyour computer documentation or consult

COURIER HIGH SPEED MODEMSGlossary J-11ProtocolA system of rules and procedures governing communicationsbetween two or more devices. Protocols vary,

COURIER HIGH SPEED MODEMSJ-12 GlossaryStart/Stop BitsThe signaling bits attached to a character before the character istransmitted during Asynchron

COURIER HIGH SPEED MODEMSGlossary J-13ThroughputThe amount of actual user data transmitted per second withoutthe overhead of protocol information su

COURIER HIGH SPEED MODEMSJ-14 GlossaryV.25An ITU-T standard for modem communications. Among otherthings, V.25 specifies an answer tone different f

COURIER HIGH SPEED MODEMSGlossary J-15V.34An ITU-T standard that allows data rates as high as 28.8K bps.V.42An ITU-T standard for modem communicatio

COURIER HIGH SPEED MODEMSTechnical Specifications K-1APPENDIX K. TECHNICAL SPECIFICATIONSYour modem uses multiple standard modulation protocols an

COURIER HIGH SPEED MODEMSK-2 Technical Specifications Additional Compatibility FeaturesITU-T V.32, 9600 bps, synchronous, asynchronous, Trellis

COURIER HIGH SPEED MODEMSTechnical Specifications K-3Fax StandardsThe Courier modem provides Group III-compatibility whencombined with Class 1 or C

COURIER HIGH SPEED MODEMSK-4 Technical Specifications DATA FORMATBinary, serial; defaults to 8-bit word length, no parity, and 1stop bitWord Pa

COURIER HIGH SPEED MODEMSTechnical Specifications K-5TEST OPTIONSAnalog loopback with test patternRemote digital loopbackDigital loopbackTest patte

COURIER HIGH SPEED MODEMS2-4 External Modem Set UpRefer to Appendix G. . .. . . if your modem is installed in a Hewlett Packard system thatuses the

COURIER HIGH SPEED MODEMSK-6 Technical Specifications FAX SERVICE CLASS 2.0 COMMANDSClass 2.0 fax commands are too numerous to be listed here.

COURIER HIGH SPEED MODEMSTechnical Specifications K-7Commands and Result Codes not supported: Call requestwith identification number (CRI); Progra

COURIER HIGH SPEED MODEMSK-8 Technical Specifications Originate Mode: 1875 HzAnswer Mode: 1875 HzOriginate Mode: 1920 HzAnswer Mode: 1920 HzUSR

COURIER HIGH SPEED MODEMSTechnical Specifications K-9V.21Originate Mode:Mark: 980 HzSpace: 1180 HzAnswer Mode:Mark: 1650 HzSpace: 1850 HzRECEIVER C

COURIER HIGH SPEED MODEMSK-10 Technical Specifications USR-V.32 terbo/V.32 bis/V.32Originate Mode: 1800 HzAnswer Mode: 1800 HzUSR-V.32 terbo/V.

COURIER HIGH SPEED MODEMSTechnical Specifications K-11V.21Originate Mode:Mark: 1650 HzSpace: 1850 HzAnswer Mode:Mark: 980 HzSpace: 1180 HzRECEIVE S

COURIER HIGH SPEED MODEMSIndex 1INDEXCommand List Bold entries indicate primary references.+++, return to Command mode, 4-10, C-2+FAA, Call Detecti

COURIER HIGH SPEED MODEMS2 IndexAAA, see LEDsACK character, HP installations, 2-4, 4-28,G-8Adapter,Card (synchronous), F-10Phone, See RJ11CPower, 2-

COURIER HIGH SPEED MODEMSIndex 3Call progress messages, 1-4see also OK, CONNECT, RING, NOCARRIER, ERROR, NO DIAL TONE,BUSY, and NO ANSWERCall Detect

COURIER HIGH SPEED MODEMS4 IndexData Set Ready (DSR, &S), 4-24Data Terminal Ready (DTR), 2-6operations (&D), 4-23–4-24, C-10DCE, J-5Dedicate

COURIER HIGH SPEED MODEMSExternal Modem Set Up 2-5NOTE: If you have built your own RS-232 cable and it doesnot support the Data Terminal Ready (DT

COURIER HIGH SPEED MODEMSIndex 5Escape code (+++), 4-10, C-2changing ASCII definition (S2), 4-10,B-14guard time (S12), B-14see DIP switch 9.EXE file

COURIER HIGH SPEED MODEMS6 IndexInternational calls, 4-30B0, 4-19, C-4&G, 4-30, C-11&P, 4-31, C-14V.21 (S27), B-21V.23 (S34), B-24Interrupts

COURIER HIGH SPEED MODEMSIndex 7Online,command mode, 4-10, C-2local echo, 4-13fallback, A-3return, 4-11Operational requirements, Chapters 2 and 3Ori

COURIER HIGH SPEED MODEMS8 IndexRS-232,connectors, 2-2description, B-2PIN assignments, B-3requirements, B-4RTS (&R), see Request to SendSee DIP

COURIER HIGH SPEED MODEMSIndex 9Tonedialing, 4-4, C-4recognition (%T), 4-31, C-20timing, spacing, duration (S11), B-14TR, see LEDsTransfer a call (!

COURIER HIGH SPEED MODEMS10 IndexXXmodem-type protocols, 4-25, 4-29XID, 6-6XON/XOFF, 4-25, 4-28character assignments (S22 and S23),B-14, B-20YYmodem

COURIER HIGH SPEED MODEMS2-6 External Modem Set UpTESTING THE INSTALLATIONUse the following procedures to verify that your modem isworking properly

COURIER HIGH SPEED MODEMSExternal Modem Set Up 2-7TroubleshootingIf your entered command is not displayed, your local echo isOFF. To turn the loca

COURIER HIGH SPEED MODEMS2-8 External Modem Set Up5. As a final check, make sure the modem gets a dial tone.Type the following Dial command:ATD <

COURIER HIGH SPEED MODEMSInternal Modem Set Up 3-1CHAPTER 3. INTERNAL MODEM SET UPPACKAGE COMPONENTSYour Courier modem package contains the follow

COURIER HIGH SPEED MODEMS3-2 Internal Modem Set UpA Telephone Adapter. . .. . .if you have an older telephone installation that does nothave the ap

COURIER HIGH SPEED MODEMSHow to Use This Manual iiiA NOTE ON COMMUNICATIONS SOFTWAREIf you're using a computer rather than a terminal, you ne

COURIER HIGH SPEED MODEMSInternal Modem Set Up 3-3If you're only using COM1 for a device, you can skip this sec-tion except for DIP Switches,

COURIER HIGH SPEED MODEMS3-4 Internal Modem Set UpSelect an Interrupt Request (IRQ)IBM-compatible computers reserve IRQ4 for COM1 and IRQ3for COM2,

COURIER HIGH SPEED MODEMSInternal Modem Set Up 3-5Reset the JumpersFigure 3.1 shows an enlarged view of the modem's jumperswitches. If you h

COURIER HIGH SPEED MODEMS3-6 Internal Modem Set UpSet DIP SwitchesA ten-position bank of Dual In-Line Package (DIP) switches islocated at the rear

COURIER HIGH SPEED MODEMSInternal Modem Set Up 3-3. Unscrew the solid bracket at the back of any availablestandard half-card slot.)The bracket will

COURIER HIGH SPEED MODEMS3-8 Internal Modem Set Up7. If you currently have a phone plugged into the wall jack,disconnect it. Plug one end of the p

COURIER HIGH SPEED MODEMSInternal Modem Set Up 3-93. Perform the function that lets you send AT commands tothe modem, that is, puts the computer in

COURIER HIGH SPEED MODEMS3-10 Internal Modem Set Upc. Make sure your software has put the computer inTerminal mode, so that you can send the modemc

COURIER HIGH SPEED MODEMSData Mode Operations 4-1CHAPTER 4. DATA MODE OPERATIONSThe information in this chapter applies to asynchronous callsonly.

COURIER HIGH SPEED MODEMS4-2 Data Mode Operations3. All commands except A/, A> and +++ are preceded bythe AT (attention) prefix and are executed

U.S. Robotics, the U.S. Robotics logo, and HST are registeredtrademarks of U.S. Robotics, Inc. Courier HST Dual StandardFax, Courier V.32 terbo Fax,

COURIER HIGH SPEED MODEMSData Mode Operations 4-3• Configuration:Echo/SpeakerResult CodesModulationError Control/Data CompressionData RatesRS-232 S

COURIER HIGH SPEED MODEMS4-4 Data Mode OperationsDIALING/ANSWERINGDialingDn Dial the specified phone number; also execute Dial options.The maximum

COURIER HIGH SPEED MODEMSData Mode Operations 4-5" Dial the letters that follow (in an alphabetical phonenumber). NOTE: If you are includin

COURIER HIGH SPEED MODEMS4-6 Data Mode OperationsR Reverse frequencies. This command allows calls to anoriginate-only modem. It reverses the mode

COURIER HIGH SPEED MODEMSData Mode Operations 4-7Store Phone Numbers&Zn=s This command stores up to ten numbers, where n is the position0−9 in

COURIER HIGH SPEED MODEMS4-8 Data Mode OperationsThe cycle continues until the modems connect or the modemreaches a maximum of 10 attempts. The 10

COURIER HIGH SPEED MODEMSData Mode Operations 4-9When the modem senses a call coming in, it sends the resultcode RING to your screen, goes off hook

COURIER HIGH SPEED MODEMS4-10 Data Mode Operations+++ Escape code operations. Once the modem is online to anothersystem, the only command it recog

COURIER HIGH SPEED MODEMSData Mode Operations 4-11Returning OnlineOn If DIP switch 9 is ON (on detection of the escape code themodem maintains the

COURIER HIGH SPEED MODEMS4-12 Data Mode OperationsWhen you power on the Courier, it loads the settings stored inNVRAM if DIP switch 10 is OFF. Unt

COURIER HIGH SPEED MODEMSTable of Contents vTABLE OF CONTENTSHow to Use this Manual iiTable of Contents vLimited Warranty ixFCC Registration Numb

COURIER HIGH SPEED MODEMSData Mode Operations 4-13Resetting the ModemZ Software reset to NVRAM settings when DIP switch 10 is OFF(factory setting).

COURIER HIGH SPEED MODEMS4-14 Data Mode OperationsIn some microcomputer documentation, the term duplex isapplied to local online echoing, although

COURIER HIGH SPEED MODEMSData Mode Operations 4-15Xn Result code set options. Use the following table (Default = X7,all codes except 12/VOICE). F

COURIER HIGH SPEED MODEMS4-16 Data Mode OperationsResult Code Meaning0/OK Command has been executed.1/CONNECT Connection with another modem; if set

COURIER HIGH SPEED MODEMSData Mode Operations 4-17Additional Result Code SubsetsNOTE: ARQ (Automatic Repeat Request) is used in thismanual to deno

COURIER HIGH SPEED MODEMS4-18 Data Mode Operations93/CONNECT 21600/V32 96/CONNECT 21600/ARQ/V3297/CONNECT 21600/VFC 98/CONNECT 21600/ARQ/VFC101/CON

COURIER HIGH SPEED MODEMSData Mode Operations 4-19ModulationBn Handshake options. There are three commands that apply tointernational calls above

COURIER HIGH SPEED MODEMS4-20 Data Mode Operations&M6 The modem enters V.25 bis synchronous mode, using acharacter-oriented link protocol simil

COURIER HIGH SPEED MODEMSData Mode Operations 4-21Data RatesThe modem can be set to a fixed or variable serial port rate. Afixed rate sets the mod

COURIER HIGH SPEED MODEMS4-22 Data Mode Operations&B2 Fixed for ARQ calls/Variable for non-ARQ calls. Answermode only. When the modem goes of

COURIER HIGH SPEED MODEMSvi Table of ContentsReset the Jumpers 3-5Set DIP Switches 3-6Installing the Modem 3-6Testing the Installation 3-8Chapter 4

COURIER HIGH SPEED MODEMSData Mode Operations 4-23The options are as follows.&N1 300 bps &N9 16.8K bps (HST, terbo,&N2 1200 bps V.FC, a

COURIER HIGH SPEED MODEMS4-24 Data Mode OperationsReturn online with the On command, or hang up with theHn command.&D2 Normal DTR operations.

COURIER HIGH SPEED MODEMSData Mode Operations 4-25Hardware ControlThe modem drops the Clear to Send (CTS) signal it's beensending to the compu

COURIER HIGH SPEED MODEMS4-26 Data Mode OperationsTransmit Data Buffer SizesThe Transmit Data refers to the data from the computer, whichthe modem

COURIER HIGH SPEED MODEMSData Mode Operations 4-27&H3 Use both hardware and software flow control. If you areunsure about what your equipment

COURIER HIGH SPEED MODEMS4-28 Data Mode OperationsNOTE: Because of the risk described in the abovewarning, the settings that follow are only recom

COURIER HIGH SPEED MODEMSData Mode Operations 4-29In non-ARQ mode, a Courier set to &I5 operates asthough flow control were disabled (&I0);

COURIER HIGH SPEED MODEMS4-30 Data Mode OperationsINQUIRY AND HELPThe modem displays information such as the current modemsettings, product code, a

COURIER HIGH SPEED MODEMSData Mode Operations 4-31&Pn This command sets the ratio of the off-hook/on-hook (make/break) interval for pulse diali

COURIER HIGH SPEED MODEMS4-32 Data Mode Operations&ZC=s Write the following command string s to NVRAM. Thecommand string may be up to 30 chara

COURIER HIGH SPEED MODEMSTable of Contents viiLast-Dialed Number Inquiry (DL?) 6-8Stored Command String Query (&ZC?) 6-8Help Screens 6-8Stop/R

COURIER HIGH SPEED MODEMSFax Operations 5-1CHAPTER 5. FAX OPERATIONS AND CALL DETECTIONFAX OPERATIONSCompatibilityThe Courier modem provides Group

COURIER HIGH SPEED MODEMS5-2 Fax OperationsIf you have a problem, however, and think the modem may bein the wrong mode, you can use one of the foll

COURIER HIGH SPEED MODEMSFax Operations 5-3FCC NoticeFCC part 68, rules regarding fax operation, has been amendedas follows:Telephone facsimile mac

COURIER HIGH SPEED MODEMS5-4 Fax OperationsCALL DETECTIONCourier High Speed modems support Call Detection, which is amethod of reporting whether an

COURIER HIGH SPEED MODEMSQueries and Help Screens 6-1CHAPTER 6. QUERIES AND HELP SCREENSUSER INQUIRIES (In)The Inquiry command has 11 options. Th

COURIER HIGH SPEED MODEMS6-2 Queries and Help Screensati4USRobotics Courier Dual Standard V.34 Fax Settings... B0 C1 E1 F1 M1 Q0 V1 X1 B

COURIER HIGH SPEED MODEMSQueries and Help Screens 6-3I6 During a connection, the modem monitors and stores infor-mation about link operations. Whe

COURIER HIGH SPEED MODEMS6-4 Queries and Help ScreensLink Timeouts: Protocol detection problems: communicationswere severed momentarily, and the

COURIER HIGH SPEED MODEMSQueries and Help Screens 6-5GSTN (General Switch Telephone Network) Clear Down:The connection was non-ARQ and DTR was drop

COURIER HIGH SPEED MODEMS6-6 Queries and Help ScreensUnable to Retrain: After several attempts, disturbances onthe phone line prevented the modems

COURIER HIGH SPEED MODEMSviii Table of ContentsAppendix CAlphabetical Command SummaryCommand Set Usage C-1Basic Command Set C-2Ampersand (&)

COURIER HIGH SPEED MODEMSQueries and Help Screens 6-7I10 View Dial Security Account status. For securityadministrators only, unless local security

COURIER HIGH SPEED MODEMS6-8 Queries and Help ScreensLAST-DIALED NUMBER QUERY (DL?)At this command the modem displays the number stored in thelast-

COURIER HIGH SPEED MODEMSQueries and Help Screens 6-9at$HELP, Command Quick Reference (CTRL-S to Stop, CTRL-C to Cancel)&$ HELP, Ampersand Com

COURIER HIGH SPEED MODEMS6-10 Queries and Help ScreensDialing (D$)At ATD$, the Courier displays this Dial command summary:atd$HELP, Dial Commands (

COURIER HIGH SPEED MODEMSQueries and Help Screens 6-11Percent Commands (%$)At AT%$, the Courier displays a screen that shows a partialsummary of th

COURIER HIGH SPEED MODEMSLink Negotiation and Error Control A-1APPENDIX A. LINK NEGOTIATION (HANDSHAKING)AND ERROR CONTROLThis appendix includes i

COURIER HIGH SPEED MODEMSA-2 Link Negotiation and Error ControlIf the remote modem has V.34 capability, the two modems use aline probing technique

COURIER HIGH SPEED MODEMSLink Negotiation and Error Control A-3OTHER V. PROTOCOL OPERATIONSEarlier, lower-speed V. protocols do not employ line pro

COURIER HIGH SPEED MODEMSA-4 Link Negotiation and Error ControlDual Standard HandshakingWe recommend that Dual Standard modems be set to retain th

COURIER HIGH SPEED MODEMSLink Negotiation and Error Control A-5V.42 HandshakingThis international standard includes a two-stage handshakingprocess:

COURIER HIGH SPEED MODEMSWarranty Information ixLIMITED WARRANTYU.S. Robotics, Inc., warrants to the original consumer or otherend user purchaser

COURIER HIGH SPEED MODEMSA-6 Link Negotiation and Error ControlPossible sizes are as follows:Bits Entries9 51210 102411 2048U.S. Robotics modems us

COURIER HIGH SPEED MODEMSLink Negotiation and Error Control A-7Throughput GuidelinesThe following guidelines should help to make the most of themod

COURIER HIGH SPEED MODEMSA-8 Link Negotiation and Error ControlXmodem Throughput may be reduced if your versionuses short block lengths (128 bytes)

COURIER HIGH SPEED MODEMSLink Negotiation and Error Control A-9The tables below indicate the typical throughput, in charactersper second (cps), tha

COURIER HIGH SPEED MODEMSA-10 Link Negotiation and Error Control28.8K bpsFile Type Typical throughput (cps)Text file 6800.ZIP files 3200Database f

COURIER HIGH SPEED MODEMSSummaries and Tables B-1APPENDIX B. SUMMARIES AND TABLESCONTENTSThe RS-232 Interface, with Pin DefinitionsFront Panel Ind

COURIER HIGH SPEED MODEMSB-2 Summaries and TablesTHE RS-232 INTERFACEDESCRIPTIONThe RS-232 interface is a standard developed by the ElectronicIndus

COURIER HIGH SPEED MODEMSSummaries and Tables B-3PIN ASSIGNMENTSThe entire standard covers many more functions than are usedin most data communicat

COURIER HIGH SPEED MODEMSB-4 Summaries and TablesMinimum RequirementsSome computer/terminal equipment supports only a few of theRS-232 signal funct

COURIER HIGH SPEED MODEMSSummaries and Tables B-5If you decide to build your own cable, use a low-capacitancecable. To further minimize the capaci