Loopback Tests, 131 | Multi-Tech Systems MT5634ZBAV instruction

C Loopback Tests

Appendix C: Loopback Tests

Introduction

Each time you turn on your modem, it performs an automatic self-test to ensure proper operation. Your modem also has three diagnostic tests: local analog loopback, remote digital loopback, and local digital loopback. These ITU-T V.54 loopback tests isolate telephone circuit and transmission problems.

In a loopback test, data from your computer loops through the circuits of your modem and/or a remote modem before it appears on your moni- tor. When the loop has been completed, the data on your PC’s monitor should match the original data.

The local analog loopback test allows you to verify that the modem’s transmitter and receiver circuits are functioning properly.

The local digital loopback allows you to verify that the local computer or terminal, the two modems, and the transmission line between them are functioning properly.

The remote digital loopback test allows you to verify that the remote computer or terminal, the remote modem, the serial ports, the tele- phone line, and the local modem are functioning properly.

Note: All loopback tests operate at all speeds except 300 bps.

131

Image 141

Multi-Tech Systems MT5634ZBAV manual Loopback Tests, 131

Contents

Model MT5634ZBA Model MT5634ZBAV Page Model MT5634ZBA Model MT5634ZBAV Models MT5634ZBA and MT5634ZBAV Contents User Guide Features Vii Callback Security Viii Appendix C Loopback Tests 145 User Guide Introduction Page Introduction Introduction Product Description What Is in Your Modem Package? Related Manuals User Guide Quick Start Page What You Will Need IntroductionQuick Start We supply Safety Warnings Mounting the feet Assemble the Modem Opening the Modem Change the Internal Jumpers Internal jumpers MT5634ZBAV Changing the Dial-Up/Leased-Line Jumpers User Guide Changing the Speaker Jumper Modem connections Connect the Modem to Your System Line Connection User Guide RS232 ConnectionPhone Connection Microphone Connection MT5634ZBAV only Power Connection Power-On TestQuick Start Speaker Connection MT5634ZBAV only Adding the Modem to Windows 95 or NT Install the Modem in Windows Removing Your Old Modem from Windows 95 or NT Install and Configure Your Software Quick Start User Guide Windows 95 HyperTerminal Call the Multi-Tech BBS Windows Terminal Quick Start Send a Fax Select Start Programs Accessories Fax Compose new fax Other Ways to Access Microsoft Fax Test the MT5634ZBAV Voice Circuits Voice Mail TestLoopback Test AT+FCLASS=8 AT+VLS=7 Speakerphone Test References Features Page What Can You Do with Your Modem? Features Data Features Voice MT5634ZBAV only Fax Required Equipment ComputerSerial Cable Communications Software Features Telephone Line Connections Connecting to the Computer RS232 Features Connecting to the Telephone Line Line Connecting to a Telephone Set PhoneConnecting to a Microphone MIC Connecting to a Speaker Spkr Connecting to a Sound Card SpkrConnecting to Power PWR Surge Protectors and Lightning Front Panel 56 56K Mode 56,000-32,000 bps. The 56 LED lights whenever Features User Guide AT Commands Registers Result Codes Page AT Commands, S-Registers, and Result Codes AT Commands AT Command Summary Enter KeyAnswer Communication Standard Setting Repeat Last CommandCarrier Control Dial DS=y Dial Stored Telephone Number ATDT1028806127853500$123456789 Echo Online Data Characters Echo Command Mode CharactersHook Control Information Request Monitor Speaker Volume Monitor Speaker ModeModulation Handshake Result Codes Enable/Disable Return Online to Data ModePulse Dialing Set Register Value Tone Dialing Sr? Read Register ValueResult Code Format Result Code Options Long Space Disconnect Modem Reset Auto Retrain Data Carrier Detect DCD ControlData Terminal Ready DTR Control Communications Mode Load Factory Settings22bis Guard Tone Control Auxiliary Relay Control Asynchronous Communications Mode Test CommandsData Set Ready DSR Control Display Current Settings Store Current ConfigurationSelect Stored Configuration for Hard Reset Speaker Codec Loopback Zy=x Store Dialing Command\An Select Maximum MNP Block Size \Bn Transmit Break \Gn Modem Port Flow Control \Jn Data Buffer ControlBreak Control \Nn Error Correction Mode Selection \Tn Inactivity Timer \Qn Flow Control Selection\Vn Protocol Result Code Data Calling Tone \Xn XON/XOFF Pass-ThroughView Numbers in Blacklist Data Compression Control DCn AT Command Control $Dn DTR Dialing$EBn #CBDn Callback Delay +ES=n Enable Synchronous Buffered ModeCommand #CBF? Callback Failed Attempts Display #CBAn Callback Attempts #CBIn Local Callback Inactivity Timer Callback Failed Attempts ResetCommand #CBNy=x Store Callback Password #CBPn Callback Parity Callback Enable/Disable Callback Security ResetEnter Setup Password Command #S=x Store Setup Password +++ATCR Escape Sequence Registers Register Unit Range Default Description S11 S10S28 S35 S37 Register Unit Range Default Description S36 Register Unit Range Default Description S38 S42S43 S48 Register Unit RangeS89 S108 Terse Verbose Description Result Codes Delayed Remote Configuration Page Remote Configuration Basic Procedure Changing the Setup Password Setup Remote Configuration Changing the Remote Escape Character User Guide Callback Security Page Callback Security Setup Procedures To Turn Callback Security On and Off User Guide To Change the Setup Password To Set the Parity of the Callback Security Messages To Assign Callback Passwords and Phone Numbers Callback Security Password-Only Callback Calling Procedures Number-Entry Callback Extension-Entry Callback Direct Connection Callback Security Commands #CBFR Command #CBPn #CBS0 Zy=+-x,???Store Dialing Command Only after the setup password has been entered 100 Solving Problems Page None of the Indicators Light Solving Problems103 104 Modem Does Not Respond to Commands 105 106 107 Modem Dials But Cannot Connect 108 109 4The Modem Disconnects While Online 110 File Transfer Is Slower Than It Should Be 111 Data Is Being Lost 4The Modem Doesn’t Work with Caller ID Fax and Data Software Can’t Run at the Same Time112 Appendixes Page FCC Regulations for Telephone Line Interconnection Regulatory Compliance115 116 117 Canadian Limitations Notice 118 FCC Fax Update 119 Compliance with Babt Requirements EMC and Safety Compliance European Low Voltage Directive120 Register Default Command DefaultAustralian Modem Warning Notice 121 122 Use of Supplied Power Transformer 123 New Zealand Telecom Warning Notice 124 Technical Specifications Mode of Operation Error CorrectionIntelligent Features Command Buffer ITU-T Carrier FrequenciesAT&T V.32 terbo ITU-T V.32bis/V.32 Carrier Frequencies 22bis/V.22 or Bell 103/113 ConnectorsFax Carrier Frequencies Indicators DiagnosticsPower Requirements Power Consumption 130 131 Loopback Tests Test procedure Local Analog Loopback Test V.54 Loop132 133 Remote Digital Loopback Test V.54 Loop 134 User Guide Test procedure 135 Local Digital Loopback Test V.54 Loop 136 Limited Warranty Warranty, Service, and Technical Support137 Technical Support ServiceMulti-Tech Systems, Inc Woodale Drive Mounds View, MN Attn Repair Online Warranty Registration Multi-Tech BBS139 If you know the file name If you don’t know the file name140 141 About the Internet About the Multi-Tech Fax-Back Service About CompuServe142 Upgrade Overview Upgrade Procedures143 Identify the Current Firmware Version Identify the Modem FirmwareMulti-Tech Web Site 144 145 Multi-Tech BBS 146 Download the Upgrade File Extract the Upgrade Files Clear Your Stored Paramenters147 148 Upgrade the Modem’s Firmware 149 Flashwin 150 Restore Your Parameters Index Page 153 Index 47, 70 154 20, 21 155 156 Enable Synchronous Buffered Mode 157 Modem Port Flow Control command 20, 55 158 159 Store Telephone Number command 160 User Guide