Trouble Shooting | ZyXEL Communications U-336R/RE specs

∙Resent Expiration

∙Protocol Error

∙Break Timeout

∙DTR Dropped

∙Carrier Lost 1 (No handshaking response)

∙Carrier Lost 2 (Remote hang-up, busy tone heard)

Trouble Shooting

Your modem is designed to provide years of ultra high speed satisfaction. In the unlikely event you encounter problems using your modem, the tips in this section will help you to identify and resolve them. Most modem problems are a result of incorrect cabling or settings within your communications or fax software. This section provides a list of more common problems that you may encounter, followed by likely solutions.

AT Command Set Problems

Problem

Your modem does not respond to AT commands.

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.Check to see that your modem’s COM port is not already assigned to another installed serial device, such as a mouse or laser printer.

126 Diagnostics & Troubleshooting

Image 138

ZyXEL Communications U-336R/RE manual Trouble Shooting, AT Command Set Problems

Contents

ZyXEL ZyXEL Limited Warranty Acknowledgments FCC Part 15 InformationCopyright 1997 by ZyXEL Iii Information for Canadian Users Page Contacting ZyXEL ∙ E-mail Vii Contents Synchronous Mode Operation Leased Line Operation Special Functions Fax Operation Status Registers & Result Codes AT Command Set SummariesDiagnostics & Troubleshooting Upgrading Your Modem Terminal Pinouts IndexXii Modem Features Standard FeaturesIntroduction Intelligent Features Technical Specifications Fax Compatibility Unpacking Your Modem Enclosed EquipmentRequired Equipment Becoming a Registered Owner Introduction 336R/RE Modem Card InstallationInstallation Name Blinking DTR TXDRXD DSR Required Steps for U-336R/RE Installation Installing the modem card Connect to phone lines Hooking Up Power Fax/Modem Communication Software InstallationConnect to Computers Setting Value AT&F For troubleshooting suggestions Installation Basic Modem Operation Understanding AT CommandsUsing the Windows 95 Hyper Terminal Program Basic Modem Operation ATEnter Dialing using the ATD Command Dialing and Answering Techniques ATS0=n Making Your First ConnectionAuto-Answer and Hook Controls 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 Dialing Stored Phone Numbers Non-Volatile MemoryStoring Phone Numbers AT&Zs=n Saving Settings and User Profiles Helpful Hints for PC Computers Default Modem Settings for PC’s AT Command DescriptionZyXEL Serial/Parallel I/O Card Macintosh Serial Port Special AT Command Settings for MacintoshHelpful Hints for Macintosh Computers Mac Software Tips Basic Modem Settings for Unix Helpful Hints for UNIX-Based ComputersSerial Cable Unix Software Tips Synchronous Mode Operation 25bis Command SetSynchronous Mode Operation Syntax Command with Description Parameters Clock Options RTS Options Sync AT&M1 Command State OptionsDialing from Synchronous Mode Data Answering from Synchronous Mode Auto-AnswerManual Answer Synchronous Mode Operation AT-Command Description Connecting to a Leased LineLine Type Setting Leased Line Operation Manual Connect Power Level SettingLeased Line Handshaking Auto Handshake AT*M0 Leased-Line Dial BackupDial Backup AT*M1 Terminating a Leased Line Connection Aborting from Leased-Line Operation Levels of Security Special FunctionsSecurity Functions Special Functions User Passwords Command Function Enters the callback number Remote Configuration AT*RabAT*Wab 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 Modem as Fax MachineFax Operation Fax Command sets Defining the Fax Command SetsITU-T T.30 Fax Protocol Class 1 Command Set Command Value Description Class 2 Command Set +FTH and +FRH support value 3 V.21 ch / 300 bps only Command Syntax Description Value+FCIG=string +FDCC=vr,br,wd Ln,df,ec,bf,st Df,ec,bf,st +FDCS=vr,br,wd+FDIS=vr,br,wd,l +FDR +FMDL? +FK+FLID=string +FMFR? +FREV? Response Value Function and Description+FCFR +FPOLL +FVOICE +FCC=vr,br,w Class 2.0 Command Set+FBS? +FCO +FDT +FIS=vr,br,wd +FLI=stringTpr,idr,nsr DCE +FNS=string+FPI=string +FRQ=pgl,cbl HEX +FCICSI ID NSC FIF A0-BF+FNC +FNF +FPI +FNSNSS FIF CIG ID Extended Fax AT Command Set Modem will wait for DC2 at the beginning of every Tone No Carrier #PstringNo Dial Busy Field Description SnnnnPstring Flow Control String Error Level Fax Reception from a BBSConnect Init AT&FX7S0=1#B1+FCLASS=6 ExtrnMail ZyXEL errorlevel Command Options Function & Description AT Command Set SummariesBasic AT Command Set 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 Register Descriptions Command Function & Description +RefStatus Registers & Result Codes 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=? Result Code Options ATXn Result Code Option Table+nnn Supported Field Name Possible Values Connect Strings for Error Corrected ConnectionsResult Code Field Descriptions Numerical Verbose 24000 Status Registers & Result Codes Diagnostics & Troubleshooting DiagnosticsDiagnostics & Troubleshooting 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 Type ATUPXenter Upgrading Your ModemUpgrading by Flash Eprom Upgrading Your Modem Kernel Recovery Mode TIP Terminal PinoutsTerminal Blocks Terminal Pinouts Signa Pin/Signal Direction DescriptionPC Serial Port Pinouts Name Macintosh Serial Port Pinouts Mac Modem Description Din Terminal Pinouts Index Index Smartdrv