Error Correction | Cabletron Systems CSMIM-T1 instruction

Chapter 6: Modem Guide

6.5ERROR CORRECTION

MNP Classes

The modem provides MNP Class 10 and supports MNP Class 5 data compression. It is compatible with all MNP products. Its enhanced MNP service is completely transparent to the user.

Class 10: Adverse Channel Enhancements (ACE) optimizes performance under poor line conditions. Class 10 continues to provide compatibility with non-MNP modems. It improves initial connection success rate by making multiple negotiation attempts when conﬁgured for auto-reliable mode. It uses Dynamic Transmit Level Adjustment to calculate optimal transmit levels automatically to compensate for cellular phone signal distortion. It lets the user conﬁgure the modem to negotiate the link at a low-speed modulation, then upshift to a higher speed after negotiation. It improves link performance during adverse channel conditions by aggressive Adaptive Packet Assembly. It maximizes throughput by continuously monitoring line quality and link performance, and dynamically upshifting or downshifting to the optimum modulation speed.

Class 5 provides data compression, which combined with MNP Class 4 allows throughput of almost twice the connection speed. Class 5 dynamically adjusts to the type of data being transmitted for maximum compression efﬁciency.

6-14	CSMIM-T1 Hardware Installation Guide

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Cabletron Systems CSMIM-T1 manual Error Correction

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 There are 7 indicators to show system activity and status System LED IndicatorsSET UP Switch 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 Height 11.5 in .4 cm Width Depth CompatibilityCSMIM-T1 Physical / Statistical Information 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 Line Speed Cable Length Feet Allowed Loss Connecting a Console TerminalMaking Connections 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 Addr -d CommandsAddr 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 3 conﬁg ConfigConfig command display looks like this Console-baud Command display looks like thisConsole-baud Erase Erase Image -d ﬁlename HelpImage 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 Ports -d When invoked, the command displays a menu of optionsPorts CSMIM-T1 Hardware Installation Guide Sequence Sequence -d interface,interface Slip Slip -d port Slip Command Prompts CSMIM-T1 Hardware Installation Guide Stats -slip Stats command display looks like thisStats StatisticDescription T-1 Commands Command Command Type Description Argument Description Stats -T current total all intervalset clearalarmStats -T current command display looks like this 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 Amber Normal Mode Error-Free SequenceActivity 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 Address Filename Pathname NetworkSystem Chapter Modem Guide Features Using the AT Command SET Key AT Command Factory Defaults Title Default Establishing 11-Bit Data Connections MNP 10 V.32bis Quick Connect Cellular Only Setup 3 V.32bis Cellular Connections Using AT CommandsUniversal Cellular 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 Local Analog Loopback with Self-Test DiagnosticsPower-Up Diagnostics 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 Short Form Long Form Result CodesConnection Result Code Tables 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 Answer Issuing AT Commands at any SpeedRepeat Last Command \An Maximum MNP Block Size Bn ITU-T/Bell ModeAn Auto-Reliable Fallback Character Compression Control Bn Modem-Port Bps Rate\Bn Transmit Break 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 First, the modem hangs up and displays no Prompt Tone Operating Mode Dial ModiﬁersThis bong signal. Once it detects it, the modem continues Redials the last telephone number that the modem dialed Dn Disconnect Buffer DelayDL Redial the Last Telephone Number Dialed DTR Control Repeat Dial\Dn Serial-Port DSR/CTS Control \D0 Result DCD EnModem-Port Data Length Command EchoEn Auto-Retrain En Compromise Equalizer \En Data Echo\E0 Mode Restore Factory Defaults Secondary Flow ControlIndependent Serial-Port/Modem-Port Speed Guard Tone Hang Up \Gn Modem-Port Flow Control\G0 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 \N3 \N n Operating ModeSets auto-reliable mode CSMIM-T1 Hardware Installation Guide On Enter Connect State AT-O4D12345 Enter On V.23 Equalizer ControlOnSerial-Port Parity 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 Tone Dial Tn Test and Diagnostics CommandsRead Online Status \Tn Inactivity Timer Clear Serial-Port Speed Display Modem Firmware Version \Vn Error Correction Result Code FormVn Result Code Form Display Bootstrap Revision Connection Speed Reporting Wn Store Complete Configuration Wn Pulse Digit CommandWn Store Current Configuration Xn Extended Result Codes Yn Long Space Disconnect \Xn XON/XOFF Pass-Through\X0 Yn Designate Default User Profile Zn Reset Registers Commands to Change or Read RegistersDisplays the contents of all T n= n commands in decimal 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 S9=n Carrier Detect Response Time S8=n Pause Time for Dial DelayS10=n Delay for Hang Up After Carrier Loss S14=n Bit Mapped Register S11=n Dtmf Tone Dialing SpeedS12=n Escape Code Guard Time 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 T6=n Timer for DCD Turn On Delay T4=n Timer for Line Turnaround Delay Carrier OnT5=n Timer for V.23 Half-Duplex Intercharacter Delay T10=n Primary Xoff Flow Control Character T7=n Timer for False Answer AbortT9=n Primary XON 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 Bit Function Position T16=n CTS Turn On Delay TimerT17=n V.32/V.32bis Connection Training Timer T23=n Bit Mapped Register Table T22=n DSR TimerT19=n Bit Mapped Register 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