Respond to Remote Digital Loopback | Cabletron Systems CSMIM-T1

Diagnostics

The operator of the remote system now types a sequence of characters.

You do not see any characters on your display while your modem echoes the characters typed by the operator of the remote modem back to the remote computer. The test continues for the time set with register S18. If you do not use register S18, the operator of the remote modem must hang up or call you on another telephone line to tell you when the test is over. To manually end the test, enter command state and type: AT&T0 <Enter>. To end the test and hang up, type: ATH <Enter>.

6.6.7Respond to Remote Digital Loopback

The Respond to Remote Digital Loopback command conﬁgures your modem to accept a request from a remote modem to engage in a Remote Digital Loopback or a Remote Digital Loopback with Self-Test. To conﬁgure the modem to accept a remote digital loopback request, at the command prompt type: AT&T4 <Enter>.

To conﬁgure the modem to ignore a remote digital loopback request, type: AT&T5 <Enter>.

6.6.8Automatically Terminating a Test: Register S18

To conﬁgure the modem to terminate a test automatically after a speciﬁed time, change the value of register S18. Register S18 determines the duration of a diagnostic test. The factory default setting is 0 seconds, which disables the timer and causes tests to continue indeﬁnitely until you cancel them. You can set this register to terminate tests after 1 to 255 seconds.

CSMIM-T1 Hardware Installation Guide

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Cabletron Systems CSMIM-T1 manual Respond to Remote Digital Loopback, Automatically Terminating a Test Register S18

Contents

CSMIM-T1 Hardware Installation Guide Page Mmac and CSMIM-T1are trademarks of Cabletron Systems, Inc FCC Notice REN/SOC FIC Usoc CSMIM-T1 Industry Canada Certiﬁcation Number Equipment Attachment Limitations Exclusion of Warranty Disclaimer of Liability Viii CSMIM-T1 Hardware Installation Guide Table of Contents Table of Contents Chapter Modem Guide Xii CSMIM-T1 Hardware Installation Guide Organization of this Document General Following conventions are used throughout this document Document Conventions Password LoginGetting Help Ctron.com CSMIM-T1 Overview CSMIM-T1 Front Panel Software Information CSMIM-T1 Console Port SET UP Switch System LED IndicatorsThere are 7 indicators to show system activity and status Network Status / Alarms 4 T-1 Network Access Modem Port Status LEDs Modem Conﬁguration Status LEDs EFS Key Number Connecting the CSMIM-T1 to a Full T-1 LineConnectivity Telco Connection Information Telco Connection Information Connecting the CSMIM-T1 to a Fractional T-1 Line CSMIM-T1 Physical / Statistical Information CompatibilityHeight 11.5 in .4 cm Width Depth Operating SafetyNon-operating Electromagnetic Compatability CSMIM-T1 Hardware Installation Guide Chapter Installing the CSMIM-T1 Locating the Ethernet Jumpers Ethernet Jumper Settings Setting the Subnet Jumper Setting the Ethernet Jumpers Network Bypass Jumper Network Bypass Jumper Install the CSMIM-T1 into the MMAC-FNB backplane as follows Installing the CSMIM-T1 Mmac M8FNB Making Connections Connecting a Console TerminalLine Speed Cable Length Feet Allowed Loss Connecting a T1 Network Interface POWER-UP and Test Connecting a Drop/Insert Interface REVISION/CONFIGURATION Information AUTO-INITIALIZING the Roms Bootp Rarp Software Installation Procedures Execute the boot command see the boot command in Chapter Invoking the Console Monitor Self-Booting the CSMIM-T1 Reloading EFS Key Value Chapter ROM Monitor Commands ROM Monitor Commands Addr CommandsAddr -d Addr -dcommand display looks like this Addr command display looks like this Boot -lv ﬁlename Boot CSMIM-T1 Hardware Installation Guide Monitor boot CSMIM-T1 Hardware Installation Guide Boot -lcommand display looks like this EOF Config command display looks like this Config3 conﬁg Console-baud Command display looks like thisConsole-baud Erase Erase Image HelpImage -d ﬁlename Ipx command display looks like this Image -dcommand display looks like this8 ipx Ipx -d Latkey command display looks like this Command syntax isLatkey -dcommand displays the current LAT key setting Latkey 11 net 10 mopMop -d Net Optionkey -dcommand displays the current settings Optionkey command display looks like thisOptionkey Ping Ports When invoked, the command displays a menu of optionsPorts -d CSMIM-T1 Hardware Installation Guide Sequence -d interface,interface Sequence Slip -d port Slip Slip Command Prompts CSMIM-T1 Hardware Installation Guide Stats Stats command display looks like thisStats -slip StatisticDescription Command Command Type Description T-1 Commands Stats -T current command display looks like this Stats -T current total all intervalset clearalarmArgument Description Frame synchronization. During this condition, the T-1 Field Description Drop/Insert Interface is out of frame sync or not receiving Reset t1 soft hard esf Keyword Deﬁnition Describes the arguments for T1loopback Keyword Description T-1 Parameters CSMIM-T1 software comes with the following new parameters Parameter Descriptions Option Description Sigproto Tniclock SET T-1 Parameters Example Ds0=2 loopstart Ds0=11 CSMIM-T1 Hardware Installation Guide Chapter Troubleshooting Procedures Status LEDs Description General Normal Mode CSMIM-T1 Diagnostics POWER-UP and Boot Procedures Activity Normal Mode Error-Free SequenceAmber Normal Mode Error Sequence Setup Mode Error-Free Sequence SET UP Mode Setup Mode Error States Boot Failures Boot Error Report Errors CSMIM-T1 sensed a hardware error during message Error Description See Table ErrorDescription Correcting CSMIM-T1 Parameters Unix Host on the LAN Load Server Host Not Responding Another CSMIM-T1 VAX VMS Load Host on the LAN Activity Green Amber CSMIM-T1 Dumps System NetworkAddress Filename Pathname Chapter Modem Guide Features Using the AT Command SET Title Default Key AT Command Factory Defaults Establishing 11-Bit Data Connections Universal Cellular Setup 3 V.32bis Cellular Connections Using AT CommandsMNP 10 V.32bis Quick Connect Cellular Only Setup Modulation Protocols V.32bis Protocols Bell 212A protocol is for 1200 bps full-duplex connections Protocol Issue %G0 Issue %G1 Protocol Conﬁguration Command Settings Speed and Protocol Connection Matrices Modem Speed and Protocol Combinations For operations at V.22 600 bps, both modems must be set to Error Correction Error Correction Power-Up Diagnostics DiagnosticsLocal Analog Loopback with Self-Test Remote Digital Loopback with Self-Test Local Analog Loopback Local Digital Loopback Remote Digital Loopback Automatically Terminating a Test Register S18 Respond to Remote Digital Loopback Connection Result Code Tables Result CodesShort Form Long Form ATV1-M0W0 or ATV1-M0W1 Report DTE Speed Result Codes Report Modulation Speed ATV1-M0W2 ATV0W0 or ATV0W1 Report DTE speed ATV0W2 Report Modulation Speed Entering Commands Command SET Repeat Last Command Issuing AT Commands at any SpeedAnswer An Auto-Reliable Fallback Character Bn ITU-T/Bell Mode\An Maximum MNP Block Size \Bn Transmit Break Bn Modem-Port Bps RateCompression Control @Cn CTS, DSR, and DCD Connect Message Control Cn Serial-Port DCD Control \C0 \Cn Auto-Reliable Buffer ATD 011225551234 Enter H2 commandDial Modifiers Dial modifiers allow you to add conditions to the telephone ATD 9,,5551234 Enter This bong signal. Once it detects it, the modem continues Operating Mode Dial ModiﬁersFirst, the modem hangs up and displays no Prompt Tone DL Redial the Last Telephone Number Dialed Dn Disconnect Buffer DelayRedials the last telephone number that the modem dialed Repeat Dial DTR Control\Dn Serial-Port DSR/CTS Control \D0 DCD Result En Auto-Retrain Command EchoEnModem-Port Data Length \En Data Echo En Compromise Equalizer\E0 Mode Secondary Flow Control Restore Factory DefaultsIndependent Serial-Port/Modem-Port Speed Guard Tone \G0 \Gn Modem-Port Flow ControlHang Up \Jn Bps Rate Adjust Detect PhaseLink Negotiation Speed Identification \Kn Break Control KnMNP Extended Services 2illustrates the \Kn command Disables speed matching Enables speed matchingSpeed Matching Provides partial speed matching Mode Setting on Originating Modem Bell212A Bell103 Modem Mode Mode Setting Answer Modem Originating Allows connections through V.32bis Modulation SelectionAllows connections through V.FC Possible Connection Speed bps MnMNP Class Connect Messages Mn Power Level Adjustment For Cellular Telephone Connections Sets auto-reliable mode \N n Operating Mode\N3 CSMIM-T1 Hardware Installation Guide On Enter Connect State OnSerial-Port Parity On V.23 Equalizer ControlAT-O4D12345 Enter PnCheck Parity Pulse Dial Fallback Modulation Speeds Quiet\Qn Serial-Port Flow Control \Q3 Control and ignores the \Q setting During direct mode connections, the modem does not use flowModem continues to send out the characters and empty Your computer to resume transmitting data to the modem Read All Registers Sn? Read Configuration RegistersRTS/CTS Options Sn DSR Options Read Online Status Tn Test and Diagnostics CommandsTone Dial Clear Serial-Port Speed \Tn Inactivity Timer Vn Result Code Form \Vn Error Correction Result Code FormDisplay Modem Firmware Version Connection Speed Reporting Display Bootstrap Revision Wn Store Current Configuration Wn Pulse Digit CommandWn Store Complete Configuration Xn Extended Result Codes \X0 \Xn XON/XOFF Pass-ThroughYn Long Space Disconnect Zn Reset Yn Designate Default User Profile Displays the contents of all T n= n commands in decimal Commands to Change or Read RegistersRegisters S1=n Ring Counter Range 0 255, Ascii decimal Default 43 +S2=n Escape Code Character S3=n Carriage Return Character S5=n Backspace Character S4=n Line Feed CharacterS6=n Wait Before Dialing S7=n Wait for Carrier After Dial S10=n Delay for Hang Up After Carrier Loss S8=n Pause Time for Dial DelayS9=n Carrier Detect Response Time S12=n Escape Code Guard Time S11=n Dtmf Tone Dialing SpeedS14=n Bit Mapped Register Bit Function Decimal Value Position S16=n Bit Mapped Register, Test Options S18=n Test Timer S22=n Bit Mapped Register Table S21=n Bit Mapped Register Table S23=n Bit Mapped Register Table S27=n Bit Mapped Register Table S25=n Delay to DTR and Asynchronous Time Delay T3=n Timer for V.21 and V.23 Answer Tone Duration T2=n Timer for V.21 Mode During Multi-Protocol Answer T5=n Timer for V.23 Half-Duplex Intercharacter Delay T4=n Timer for Line Turnaround Delay Carrier OnT6=n Timer for DCD Turn On Delay T9=n Primary XON Flow Control Character T7=n Timer for False Answer AbortT10=n Primary Xoff Flow Control Character T11=n Secondary XON Flow Control Character T14=n Connect Message Delay TimerT12=n Secondary Xoff Flow Control Character T15=n V.24 Control Register T17=n V.32/V.32bis Connection Training Timer T16=n CTS Turn On Delay TimerBit Function Position T19=n Bit Mapped Register T22=n DSR TimerT23=n Bit Mapped Register Table T42=n V.34/V.FC Connection Speed Selection T26=n Bit Mapped Register Table CSMIM-T1 Hardware Installation Guide Console Port Appendix a Port PIN/SIGNAL Allocations Interface Ports DCE Cabletron part number 9372075 for DB25 male Additional Cabletron Cables and Connectors CSMIM-T1 Hardware Installation Guide Numerics Symbols INDEX-2 INDEX-3 INDEX-4 INDEX-5 INDEX-6 INDEX-7 INDEX-8 INDEX-9 INDEX-10