Remote Digital Loopback | Cabletron Systems CSMIM-T1 manual

Chapter 6: Modem Guide

6.6.5Remote Digital Loopback

Remote Digital Loopback tests the remote modem port, the telephone line, the local serial and modem ports, and the local computer. This test requires you to type a sequence of characters at your computer. The modem then sends these characters to the remote modem, which echoes them back to your modem.

Initiate a Remote Digital Loopback by using the &T6 command.

Using Commands to Perform a Remote Digital Loopback

To initiate a Remote Digital Loopback:

1.Dial the number of a remote system configured to accept a Remote Digital Loopback request.

2.When the modems connect, return to the command state and type: B <Enter>.

3.Type a sequence of characters.

The characters echoed on your display should match exactly the characters you typed. The test continues for the time set with register S18, or until you manually terminate the test. To manually end the test, enter command state and type: AT&T0 <Enter>.

To end the test and hang up, type: ATH <Enter>

6.6.6Local Digital Loopback

Local Digital Loopback allows the modem to loop back data to the remote modem. It tests the remote computer, the remote modem and serial ports, the telephone line, and the local modem port. You initiate a Local Digital Loopback by using the &T3 command.

Using Commands to Perform a Local Digital Loopback

To initiate a Local Digital Loopback:

1.Dial the number of a remote system.

2.When the modems connect, return to the command state and type: AT&T3 <Enter>.

6-18	CSMIM-T1 Hardware Installation Guide

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Cabletron Systems CSMIM-T1 manual Remote Digital Loopback, Local Digital Loopback

Contents

CSMIM-T1 Hardware Installation Guide Page Mmac and CSMIM-T1are trademarks of Cabletron Systems, Inc FCC Notice REN/SOC FIC Usoc CSMIM-T1 Equipment Attachment Limitations Industry Canada Certiﬁcation Number 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 General Organization of this Document Document Conventions Following conventions are used throughout this document Login PasswordGetting Help Ctron.com CSMIM-T1 Overview Software Information CSMIM-T1 Front Panel Console Port CSMIM-T1 System LED Indicators SET UP SwitchThere are 7 indicators to show system activity and status 4 T-1 Network Access Network Status / Alarms Modem Conﬁguration Status LEDs Modem Port Status LEDs Connecting the CSMIM-T1 to a Full T-1 Line EFS Key NumberConnectivity Telco Connection Information Connecting the CSMIM-T1 to a Fractional T-1 Line Telco Connection Information Compatibility CSMIM-T1 Physical / Statistical InformationHeight 11.5 in .4 cm Width Depth Safety OperatingNon-operating Electromagnetic Compatability CSMIM-T1 Hardware Installation Guide Chapter Installing the CSMIM-T1 Ethernet Jumper Settings Locating the Ethernet Jumpers Setting the Ethernet Jumpers Setting the Subnet Jumper Network Bypass Jumper Network Bypass Jumper Installing the CSMIM-T1 Install the CSMIM-T1 into the MMAC-FNB backplane as follows Mmac M8FNB Connecting a Console Terminal Making ConnectionsLine Speed Cable Length Feet Allowed Loss Connecting a T1 Network Interface Connecting a Drop/Insert Interface POWER-UP and Test REVISION/CONFIGURATION Information AUTO-INITIALIZING the Roms Bootp Software Installation Procedures Rarp Execute the boot command see the boot command in Chapter Self-Booting the CSMIM-T1 Invoking the Console Monitor Reloading EFS Key Value Chapter ROM Monitor Commands ROM Monitor Commands Commands AddrAddr -d Addr command display looks like this Addr -dcommand display looks like this Boot Boot -lv ﬁlename CSMIM-T1 Hardware Installation Guide Monitor boot CSMIM-T1 Hardware Installation Guide Boot -lcommand display looks like this EOF Config Config command display looks like this3 conﬁg Command display looks like this Console-baudConsole-baud Erase Erase Help ImageImage -d ﬁlename Image -dcommand display looks like this Ipx command display looks like this8 ipx Ipx -d Command syntax is Latkey command display looks like thisLatkey -dcommand displays the current LAT key setting Latkey 10 mop 11 netMop -d Net Optionkey command display looks like this Optionkey -dcommand displays the current settingsOptionkey Ping When invoked, the command displays a menu of options PortsPorts -d CSMIM-T1 Hardware Installation Guide Sequence Sequence -d interface,interface Slip Slip -d port Slip Command Prompts CSMIM-T1 Hardware Installation Guide Stats command display looks like this StatsStats -slip StatisticDescription T-1 Commands Command Command Type Description Stats -T current total all intervalset clearalarm Stats -T current command display looks like thisArgument Description Field Description Frame synchronization. During this condition, the T-1 Drop/Insert Interface is out of frame sync or not receiving Reset t1 soft hard esf Keyword Deﬁnition Describes the arguments for T1loopback T-1 Parameters Keyword Description Parameter Descriptions CSMIM-T1 software comes with the following new parameters Option Description Sigproto Tniclock SET T-1 Parameters Example Ds0=2 loopstart Ds0=11 CSMIM-T1 Hardware Installation Guide Chapter Troubleshooting Procedures LEDs Description Status General POWER-UP and Boot Procedures Normal Mode CSMIM-T1 Diagnostics Normal Mode Error-Free Sequence ActivityAmber Normal Mode Error Sequence SET UP Mode Setup Mode Error-Free Sequence Setup Mode Error States Boot Failures Boot Error Report Error Description Errors CSMIM-T1 sensed a hardware error during message ErrorDescription See Table Correcting CSMIM-T1 Parameters Load Server Host Not Responding Unix Host on the LAN Another CSMIM-T1 VAX VMS Load Host on the LAN CSMIM-T1 Dumps Activity Green Amber Network SystemAddress Filename Pathname Chapter Modem Guide Features Using the AT Command SET Key AT Command Factory Defaults Title Default Establishing 11-Bit Data Connections 3 V.32bis Cellular Connections Using AT Commands Universal Cellular SetupMNP 10 V.32bis Quick Connect Cellular Only Setup Modulation Protocols V.32bis Protocols Bell 212A protocol is for 1200 bps full-duplex connections Protocol Conﬁguration Command Settings Protocol Issue %G0 Issue %G1 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 Diagnostics Power-Up DiagnosticsLocal Analog Loopback with Self-Test Local Analog Loopback Remote Digital Loopback with Self-Test Remote Digital Loopback Local Digital Loopback Respond to Remote Digital Loopback Automatically Terminating a Test Register S18 Result Codes Connection Result Code TablesShort Form Long Form Result Codes ATV1-M0W0 or ATV1-M0W1 Report DTE Speed ATV1-M0W2 Report Modulation Speed ATV0W0 or ATV0W1 Report DTE speed ATV0W2 Report Modulation Speed Command SET Entering Commands Issuing AT Commands at any Speed Repeat Last CommandAnswer Bn ITU-T/Bell Mode An Auto-Reliable Fallback Character\An Maximum MNP Block Size Bn Modem-Port Bps Rate \Bn Transmit BreakCompression Control Cn Serial-Port DCD Control @Cn CTS, DSR, and DCD Connect Message Control \Cn Auto-Reliable Buffer \C0 H2 command ATD 011225551234 EnterDial Modifiers Dial modifiers allow you to add conditions to the telephone ATD 9,,5551234 Enter Operating Mode Dial Modiﬁers This bong signal. Once it detects it, the modem continuesFirst, the modem hangs up and displays no Prompt Tone Dn Disconnect Buffer Delay DL Redial the Last Telephone Number DialedRedials the last telephone number that the modem dialed DTR Control Repeat Dial\Dn Serial-Port DSR/CTS Control \D0 Result DCD Command Echo En Auto-RetrainEnModem-Port Data Length En Compromise Equalizer \En Data Echo\E0 Mode Restore Factory Defaults Secondary Flow ControlIndependent Serial-Port/Modem-Port Speed Guard Tone \Gn Modem-Port Flow Control \G0Hang Up Detect Phase \Jn Bps Rate AdjustLink Negotiation Speed Identification KnMNP Extended Services \Kn Break Control 2illustrates the \Kn command Enables speed matching Disables speed matchingSpeed Matching Provides partial speed matching Mode Setting on Originating Modem Bell212A Bell103 Mode Mode Setting Answer Modem Originating Modem Modulation Selection Allows connections through V.32bisAllows connections through V.FC Possible Connection Speed bps Mn Power Level Adjustment For Cellular Telephone Connections MnMNP Class Connect Messages \N n Operating Mode Sets auto-reliable mode\N3 CSMIM-T1 Hardware Installation Guide On Enter Connect State On V.23 Equalizer Control OnSerial-Port ParityAT-O4D12345 Enter Pulse Dial PnCheck Parity Quiet Fallback Modulation Speeds\Qn Serial-Port Flow Control \Q3 During direct mode connections, the modem does not use flow Control and ignores the \Q settingModem continues to send out the characters and empty Your computer to resume transmitting data to the modem Sn? Read Configuration Registers Read All RegistersRTS/CTS Options Sn DSR Options Tn Test and Diagnostics Commands Read Online StatusTone Dial \Tn Inactivity Timer Clear Serial-Port Speed \Vn Error Correction Result Code Form Vn Result Code FormDisplay Modem Firmware Version Display Bootstrap Revision Connection Speed Reporting Wn Pulse Digit Command Wn Store Current ConfigurationWn Store Complete Configuration Xn Extended Result Codes \Xn XON/XOFF Pass-Through \X0Yn Long Space Disconnect Yn Designate Default User Profile Zn Reset Commands to Change or Read Registers Displays the contents of all T n= n commands in decimalRegisters Range 0 255, Ascii decimal Default 43 + S1=n Ring CounterS2=n Escape Code Character S3=n Carriage Return Character S4=n Line Feed Character S5=n Backspace CharacterS6=n Wait Before Dialing S7=n Wait for Carrier After Dial S8=n Pause Time for Dial Delay S10=n Delay for Hang Up After Carrier LossS9=n Carrier Detect Response Time S11=n Dtmf Tone Dialing Speed S12=n Escape Code Guard TimeS14=n Bit Mapped Register S16=n Bit Mapped Register, Test Options Bit Function Decimal Value Position S18=n Test Timer S21=n Bit Mapped Register Table S22=n Bit Mapped Register Table S23=n Bit Mapped Register Table S25=n Delay to DTR and Asynchronous Time Delay S27=n Bit Mapped Register Table T2=n Timer for V.21 Mode During Multi-Protocol Answer T3=n Timer for V.21 and V.23 Answer Tone Duration T4=n Timer for Line Turnaround Delay Carrier On T5=n Timer for V.23 Half-Duplex Intercharacter DelayT6=n Timer for DCD Turn On Delay T7=n Timer for False Answer Abort T9=n Primary XON Flow Control CharacterT10=n Primary Xoff Flow Control Character T14=n Connect Message Delay Timer T11=n Secondary XON Flow Control CharacterT12=n Secondary Xoff Flow Control Character T15=n V.24 Control Register T16=n CTS Turn On Delay Timer T17=n V.32/V.32bis Connection Training TimerBit Function Position T22=n DSR Timer T19=n Bit Mapped RegisterT23=n Bit Mapped Register Table T26=n Bit Mapped Register Table T42=n V.34/V.FC Connection Speed Selection CSMIM-T1 Hardware Installation Guide Appendix a Port PIN/SIGNAL Allocations Console Port Interface Ports Additional Cabletron Cables and Connectors DCE Cabletron part number 9372075 for DB25 male CSMIM-T1 Hardware Installation Guide Symbols Numerics INDEX-2 INDEX-3 INDEX-4 INDEX-5 INDEX-6 INDEX-7 INDEX-8 INDEX-9 INDEX-10