Command Echo Problems | ZyXEL Communications U-336R/RE manual

Problem

You receive the ERROR result code after typing an AT command.

Solution

You may have typed a command that is not recognized by your modem or communications software.

Command Echo Problems

Problem

You do not see any typed characters on your computer screen.

Solutions

1.Make sure the DTR LED is ON. If it is OFF, make sure your communications software is using the same COM port as your modem.

2.Neither your modem nor your communications software is configured to echo characters. Use the E1 command to enable modem echo, or turn on your software program’s Echo (or duplex) feature.

Problem

Each character you type appears twice on your computer screen.

Solution

Both your modem and your communications software are echoing characters to your screen. Use the E0 command to disable modem echo, or turn off your software program’s echo (or duplex) feature.

Answer Problems

Problem

Your modem does not auto-answer incoming calls.

Solutions

1.Make sure the supplied telephone cable is connected to your modem’s LINE jack and not the PHONE jack.

128 Diagnostics & Troubleshooting

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ZyXEL Communications U-336R/RE manual Command Echo Problems, Answer Problems

Contents

ZyXEL ZyXEL Limited Warranty FCC Part 15 Information Copyright 1997 by ZyXELAcknowledgments Iii Information for Canadian Users Page Contacting ZyXEL ∙ E-mail Vii Contents Synchronous Mode Operation Leased Line Operation Special Functions Fax Operation AT Command Set Summaries Diagnostics & TroubleshootingStatus Registers & Result Codes Upgrading Your Modem Xii Terminal PinoutsIndex Introduction Modem FeaturesStandard Features Intelligent Features Technical Specifications Fax Compatibility Required Equipment Unpacking Your ModemEnclosed Equipment Becoming a Registered Owner Introduction Installation Installation336R/RE Modem Card Name Blinking TXD RXDDTR DSR Required Steps for U-336R/RE Installation Installing the modem card Connect to phone lines Connect to Computers Hooking Up PowerFax/Modem Communication Software Installation Setting Value AT&F For troubleshooting suggestions Installation Understanding AT Commands Using the Windows 95 Hyper Terminal ProgramBasic Modem Operation Basic Modem Operation ATEnter Dialing using the ATD Command Dialing and Answering Techniques Making Your First Connection Auto-Answer and Hook ControlsATS0=n ATS0=0 Quick Tips when issuing AT Commands Command Description AT Command Set/Type Example Modem Result Codes Viewing S Register Values Changing S Register Values Non-Volatile Memory Storing Phone NumbersDialing Stored Phone Numbers AT&Zs=n Saving Settings and User Profiles Helpful Hints for PC Computers ZyXEL Serial/Parallel I/O Card Default Modem Settings for PC’sAT Command Description Special AT Command Settings for Macintosh Helpful Hints for Macintosh ComputersMacintosh Serial Port Mac Software Tips Serial Cable Basic Modem Settings for UnixHelpful Hints for UNIX-Based Computers Unix Software Tips Synchronous Mode Operation Synchronous Mode Operation25bis Command Set Syntax Command with Description Parameters Clock Options RTS Options Command State Options Dialing from Synchronous ModeSync AT&M1 Data Manual Answer Answering from Synchronous ModeAuto-Answer Synchronous Mode Operation Connecting to a Leased Line Line Type SettingAT-Command Description Leased Line Operation Power Level Setting Leased Line HandshakingManual Connect Auto Handshake Leased-Line Dial Backup Dial BackupAT*M0 AT*M1 Terminating a Leased Line Connection Aborting from Leased-Line Operation Special Functions Security FunctionsLevels of Security Special Functions User Passwords Command Function Enters the callback number AT*Wab Remote ConfigurationAT*Rab Caller Number Delivery Caller ID Ring Here is an example Distinctive Ring Extended Distinctive Ring EDR Type Bit Ring Sequence Special Functions Setting Up EDR S51 Bit-mapped register default Bits Bin Dec Description EDR Application Example CID/EDR RD Special Functions Special Functions Fax Operation Fax OperationModem as Fax Machine ITU-T T.30 Fax Protocol Fax Command setsDefining the Fax Command Sets Class 1 Command Set Command Value Description Class 2 Command Set +FTH and +FRH support value 3 V.21 ch / 300 bps only +FCIG=string Command Syntax DescriptionValue +FDCC=vr,br,wd Ln,df,ec,bf,st +FDCS=vr,br,wd +FDIS=vr,br,wd,lDf,ec,bf,st +FDR +FK +FLID=string+FMDL? +FMFR? +FCFR +FREV?Response Value Function and Description +FPOLL +FVOICE Class 2.0 Command Set +FBS?+FCC=vr,br,w +FCO +FDT Tpr,idr,nsr +FIS=vr,br,wd+FLI=string +FNS=string +FPI=stringDCE +FRQ=pgl,cbl HEX +FCICSI ID A0-BF +FNCNSC FIF +FNF +FNS NSS FIF+FPI CIG ID Extended Fax AT Command Set Modem will wait for DC2 at the beginning of every #Pstring No DialTone No Carrier Busy Pstring Field DescriptionSnnnn Flow Control Connect String Error LevelFax Reception from a BBS Init AT&FX7S0=1#B1+FCLASS=6 ExtrnMail ZyXEL errorlevel AT Command Set Summaries Basic AT Command SetCommand Options Function & Description AT Command Set Summaries Command Options Function & Description UPX Description of ATI2 Output Link Status Report output appears as follows Data Type Description Output Parameter Output Value Description DTE Extended AT& Command Set DTE/DCE Command Options Function & Description Command Options Function & Description Command Options Function & Description Command Options Function & Description Command Options Function & Description Extended AT* Command Set Command Options Function & Description Command Options Function & Description Command Function & Description +Ref Status Registers & Result CodesRegister Descriptions Basic S-Registers ATSn=x Command Bit Dec Hex Function and description Extended S-Registers ATSn=x Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description ATX1 ATX2 ATX3 ATX4 Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description ATA Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description Register bit number, b, used in ATSr.b=n ATSr.b=? +nnn Result Code OptionsATXn Result Code Option Table Supported Connect Strings for Error Corrected Connections Result Code Field DescriptionsField Name Possible Values Numerical Verbose 24000 Status Registers & Result Codes Diagnostics & Troubleshooting Diagnostics & TroubleshootingDiagnostics Power-On Self Test Loopback Tests FR Calibration Indicator Lights Line Condition Status Display Received Signal Power Level RX Link Status Report ATI2 Characters sent from the DTE to the modem for transmission Data bytes sent to the remote modem ∙ Local Hang-up ∙ Remote Hang-up ∙ Carrier Lost ∙ On Line Trouble Shooting AT Command Set Problems Your modem fails to execute AT commands Command Echo Problems Answer Problems Dialing Problems Data Transfer Problems Connect Problems Upgrading Your Modem Upgrading by Flash EpromType ATUPXenter Upgrading Your Modem Kernel Recovery Mode Terminal Pinouts Terminal BlocksTIP Terminal Pinouts Pin/Signal Direction Description PC Serial Port PinoutsSigna Name Macintosh Serial Port Pinouts Mac Modem Description Din Terminal Pinouts Index Index Smartdrv