Indicator Lights | ZyXEL Communications U-336R/RE instruction

received from the remote modem will be returned to the remote modem. This test is applicable when the remote modem does not provide V.54 Remote Digital Loopback capability. This test can be initiated by the local modem when the modems are on-line.

Remote Digital Loopback Test (AT&T6)

This test will request the remote modem to do a digital loopback. During testing, the local modem will send a remote digital loopback request to the remote modem according to V.54. If the remote modem supports V.54 and is programmed to grant this kind of request, it will resend all of the received data back to the local modem. The local terminal or computer will receive all of the data it sends out. This test is applicable when the remote modem and local modem both provide V.54 Remote Digital Loopback capability. This test can be initiated by either modem when the modems are on-line.

Remote Digital Loopback with Self-test (AT&T7)

This test generates data from the modem itself instead of input data from the RS-232 interface. The data will go through the same path as it would with the Remote Digital Loopback Test. In asynchronous mode, the pattern consists of printable ASCII characters. You can see the results on the screen. In the synchronous mode, the pattern is made up of scrambled binary 1, and the Throughput Meter of the initiated modem will change to a Bit Error Rate Meter. This test can be initiated by either modem when the modems are on-line.

Indicator Lights

Retransmission Indicator

In the error control mode, an error occurring in the link will cause the data to be re-transmitted. At the same time, the RI LED will flash. This also indicates the quality of the line.

Diagnostics & Troubleshooting 119

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ZyXEL Communications U-336R/RE manual Indicator Lights

Contents

ZyXEL ZyXEL Limited Warranty Iii FCC Part 15 InformationCopyright 1997 by ZyXEL Acknowledgments Information for Canadian Users Page ∙ E-mail Contacting ZyXEL Vii Contents Leased Line Operation Synchronous Mode Operation Fax Operation Special Functions Upgrading Your Modem AT Command Set SummariesDiagnostics & Troubleshooting Status Registers & Result Codes Xii Terminal PinoutsIndex Introduction Modem FeaturesStandard Features Intelligent Features Fax Compatibility Technical Specifications Required Equipment Unpacking Your ModemEnclosed Equipment Becoming a Registered Owner Introduction Name Blinking InstallationInstallation 336R/RE Modem Card DSR TXDRXD DTR Required Steps for U-336R/RE Installation Connect to phone lines Installing the modem card Connect to Computers Hooking Up PowerFax/Modem Communication Software Installation AT&F Setting Value For troubleshooting suggestions Installation Basic Modem Operation Understanding AT CommandsUsing the Windows 95 Hyper Terminal Program Basic Modem Operation ATEnter Dialing and Answering Techniques Dialing using the ATD Command ATS0=0 Making Your First ConnectionAuto-Answer and Hook Controls ATS0=n Quick Tips when issuing AT Commands AT Command Set/Type Example Command Description Modem Result Codes Changing S Register Values Viewing S Register Values AT&Zs=n Non-Volatile MemoryStoring Phone Numbers Dialing Stored Phone Numbers Helpful Hints for PC Computers Saving Settings and User Profiles ZyXEL Serial/Parallel I/O Card Default Modem Settings for PC’sAT Command Description Mac Software Tips Special AT Command Settings for MacintoshHelpful Hints for Macintosh Computers Macintosh Serial Port Serial Cable Basic Modem Settings for UnixHelpful Hints for UNIX-Based Computers Unix Software Tips Synchronous Mode Operation Synchronous Mode Operation25bis Command Set Clock Options Syntax Command with Description Parameters RTS Options Data Command State OptionsDialing from Synchronous Mode Sync AT&M1 Manual Answer Answering from Synchronous ModeAuto-Answer Synchronous Mode Operation Leased Line Operation Connecting to a Leased LineLine Type Setting AT-Command Description Auto Handshake Power Level SettingLeased Line Handshaking Manual Connect AT*M1 Leased-Line Dial BackupDial Backup AT*M0 Aborting from Leased-Line Operation Terminating a Leased Line Connection Special Functions Special FunctionsSecurity Functions Levels of Security User Passwords Enters the callback number Command Function AT*Wab Remote ConfigurationAT*Rab Caller Number Delivery Caller ID Ring Here is an example Distinctive Ring Type Bit Ring Sequence Extended Distinctive Ring EDR Special Functions S51 Bit-mapped register default Bits Bin Dec Description Setting Up EDR CID/EDR RD EDR Application Example Special Functions Special Functions Fax Operation Fax OperationModem as Fax Machine ITU-T T.30 Fax Protocol Fax Command setsDefining the Fax Command Sets Command Value Description Class 1 Command Set +FTH and +FRH support value 3 V.21 ch / 300 bps only Class 2 Command Set +FCIG=string Command Syntax DescriptionValue Ln,df,ec,bf,st +FDCC=vr,br,wd +FDR +FDCS=vr,br,wd+FDIS=vr,br,wd,l Df,ec,bf,st +FMFR? +FK+FLID=string +FMDL? +FCFR +FREV?Response Value Function and Description +FVOICE +FPOLL +FCO Class 2.0 Command Set+FBS? +FCC=vr,br,w +FDT Tpr,idr,nsr +FIS=vr,br,wd+FLI=string +FRQ=pgl,cbl +FNS=string+FPI=string DCE +FCICSI ID HEX +FNF A0-BF+FNC NSC FIF CIG ID +FNSNSS FIF +FPI Extended Fax AT Command Set Modem will wait for DC2 at the beginning of every Busy #PstringNo Dial Tone No Carrier 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 AT Command Set SummariesBasic AT Command Set Command Options Function & Description Command Options Function & Description UPX Link Status Report output appears as follows Description of ATI2 Output Output Parameter Output Value Description Data Type Description DTE DTE/DCE Extended AT& Command Set 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 Basic S-Registers ATSn=x Command Function & Description +RefStatus Registers & Result Codes Register Descriptions 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 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 Numerical Verbose Connect Strings for Error Corrected ConnectionsResult Code Field Descriptions Field Name Possible Values 24000 Status Registers & Result Codes Diagnostics & Troubleshooting Diagnostics & TroubleshootingDiagnostics Power-On Self Test FR Calibration Loopback Tests 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 AT Command Set Problems Trouble Shooting Your modem fails to execute AT commands Answer Problems Command Echo Problems Dialing Problems Connect Problems Data Transfer Problems Upgrading Your Modem Upgrading Your ModemUpgrading by Flash Eprom Type ATUPXenter Kernel Recovery Mode Terminal Pinouts Terminal PinoutsTerminal Blocks TIP Name Pin/Signal Direction DescriptionPC Serial Port Pinouts Signa Mac Modem Description Din Macintosh Serial Port Pinouts Terminal Pinouts Index Index Smartdrv