Multi-Tech Systems MT5634MSV manual Remote Digital Loopback Test V.54 Loop

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MessageSaver User Guide

2.Type AT&T1 and press ENTER. This places your modem in analog loopback mode in the originate mode. A CONNECT message should appear on your dis- play. The modem is now out of command mode and in a pseudo-online mode.

3.Note that the CD LED is on. If you are set for 14,400 bps or higher, a speed LED should be on. If the CD LED is not on, there is a defect in your modem.

4.Enter characters from your keyboard. For this test, typing multiple uppercase U characters is a good way to send an alternating test pattern of binary ones and zeros. The characters entered should be displayed on your monitor. The TD and RD LEDs should flash when a character is entered.

5.To exit the test, type the escape sequence +++AT and press ENTER. This puts the modem in online command mode. Then type either AT&T or ATH to return to command mode.

6.Your modem passes this test if the data received on your monitor are the same as the data entered from your keyboard. If different data appear on your monitor, your modem is probably causing the problem, though it could also be your com- puter. If your modem passes this test, but you are receiving errors while on line, the remote modem or the phone line could be at fault.

Remote Digital Loopback Test (V.54 Loop 2)

The remote digital loopback test tests the phone lines and the circuits of both your modem and a remote modem. In this test, your modem must be on line with another modem that is set up to respond to a request for remote digital loopback. (Note that some modems might not support remote digital loopback or might have it disabled.) Data from your computer or terminal is transmitted through your modem and over the phone line to the remote modem, where it is then looped back to your modem.

AT&T6

OK UUUUUUUUU UUUUU

Digital Analog			Analog Digital

AT&T6

OK

Computer or Terminal Local MultiModem

Remote MultiModem Computer or Terminal

Figure C-2. Remote digital loopback test.

Test procedure

1.Arrange to have &T6 set on the remote test modem.

2.Open your communications software and go into terminal mode. Type AT and press ENTER; you should get an OK message. Type AT\N and press ENTER to disable error correction.

3.Dial the remote modem and establish your online connection.

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Contents User Guide FCC Part User Guide Record of Revisions Quick Start IntroductionMessageSaver Operation AT Commands, S-Registers & Result Codes Remote ConfigurationSolving Problems PhoneToolsAppendix a Regulatory Compliance Appendix C Loopback TestsAppendix D Warranty, Service, and Technical Support Appendix E Upgrade ProceduresIntroduction Introduction Product Description What Is in Your Modem Package? How to Get a Copy of Your User Guide Related ManualsMessageSaver User Guide Quick Start Safety Warnings IntroductionWhat You Will Need We supplySelect Stereo or Mono Speaker Mount the FeetOpening the Modem Changing the Speaker Jumper Location of speaker jumperRS232 Connection Connect the Modem to Your SystemLine Connection Power Connection Power-On TestPhone Connection Microphone ConnectionAdding the Modem to Windows Install the Modem in WindowsRemoving Your Old Modem from Windows Install and Configure Your Software Call the Multi-Tech BBS Windows HyperTerminal Windows Terminal Send a Fax Microsoft FaxSelect Start Programs Accessories Fax Compose new fax ReferencesMessageSaver User Guide MessageSaver Operation PhoneTools Features Independent Mode FunctionsRecording and Downloading an Announcement MessageSaver OperationIndependent Mode Operation in PhoneTools Independent Mode Configuration Dialog BoxIndependent Mode Control Dialog Box Independent Mode Control dialog boxIndependent Mode Operation Using the Front Panel Control ButtonsIndicator Lights Adjusting Speaker Volume Answering a Call with the SpeakerphonePlaying Voice Messages Stopping the Play of Voice MessagesUsing the MessageSaver in Speakerphone Mode Remote ControlControlling the MessageSaver Remotely Activating Independent Mode Remotely Remote Control KeysAT Commands Registers Result Codes AT Commands AT Command Summary Echo Command Mode Characters DS=y Dial Stored Telephone NumberEcho Online Data Characters Hook ControlMonitor Speaker Volume Monitor Speaker ModeReturn Online to Data Mode Modulation HandshakeResult Codes Enable/Disable Set Register ValueSr? Read Register Value Tone DialingModem Reset Long Space DisconnectAuto Retrain Data Carrier Detect DCD ControlLoad Factory Settings Communications ModeAsynchronous Communications Mode 22bis Guard Tone ControlTest Commands Display Current SettingsStore Current Configuration Select Stored Configuration for Hard Reset\An \Bn Transmit Break\Gn Modem Port Flow Control \Jn Data Buffer Control\Tn Inactivity Timer \Nn Error Correction Mode Selection\Qn Flow Control Selection DCn AT Command Control \Vn Protocol Result Code\Xn XON/XOFF Pass-Through Data Calling ToneCommand +ES=n Enable Synchronous Buffered Mode #Sx Enter Setup Password#S=x Store Setup Password Command +++ATCR Escape SequenceRegister Unit Range Default Description RegistersRegister Unit Range Default Description S37 Register Unit Range Default Description S42 Result Codes Terse Verbose DescriptionBlacklist Full Remote Configuration Setup Basic ProcedureChanging the Setup Password Changing the Remote Escape Character MessageSaver User Guide Solving Problems None of the Indicators Light Modem Does Not Respond to Commands Modem Dials But Cannot Connect Modem4Disconnects While Online File Transfer4Is Slower Than It Should Be Modem4Cannot Connect When AnsweringData Is Being Lost Modem4Doesn’t Work with Caller ID There Are Garbage4 Characters on the MonitorFax and Data4Software Can’t Run at the Same Time MessageSaver User Guide PhoneTools Installing PhoneTools Phone Module Using PhoneTools’ Status BarMaking a Phone Call Using the Speakerphone Making Quick Dial EntriesVoice Module Setting up AnswerphoneActivating and Deactivating Answerphone Setting Up the Answer Only Mode Setting Up the Answer/Record ModeListening to Received Messages from a Remote Phone Listening to Received Messages in PhoneToolsRecording an Announcement Changing Recording ParametersConfiguring and Controlling Independent Mode Operation Independent ModeHow Does It Work? Activating and Configuring Independent Mode Selecting an AnnouncementIndependent Mode Managing Stored Documents InboxFax Module Faxing a Document from a Windows ApplicationFaxing a File Directly from PhoneTools Sending a CoverAdding a Logo to the Cover Viewing and Printing FaxesInbox and Outbox Management Inbox ManagementOutbox Management Phone Book Creating New RecordsImporting Existing Records Selecting RecordsUsing the Phone Book for Dialing Terminal Emulation Module Starting a Modem ConnectionUploading Files to a Remote System Capturing Information to DiskData File Transfer Sending a Data File AutomaticallyReceiving a Data File Automatically Appendixes Appendix a Regulatory Compliance FCC Part 68 TelecomFax Branding Statement Regulatory ComplianceInternational Modem Restrictions Canadian Limitations NoticeCommission Decision CTR21 EMC and Safety Compliance New Zealand Telecom Warning NoticeMessageSaver User Guide Appendix B Technical Specifications Carrier Frequencies Frequency Stability MessageSaver User Guide Test procedure Local Analog Loopback Test V.54 LoopRemote Digital Loopback Test V.54 Loop Figure C-2. Remote digital loopback testLocal Digital Loopback Test V.54 Loop Figure C-3. Local digital loopback testMessageSaver User Guide Limited Warranty ServiceTechnical Support Online Warranty RegistrationMulti-Tech BBS About the Internet About the Multi-Tech Fax-Back Service Modem AccessoriesSupplyNet Online Ordering Instructions Upgrade Overview Identify the Modem FirmwareMulti-Tech Web Site Identify the Current Firmware VersionMulti-Tech BBS Extract the Upgrade Files Download the Upgrade FileClear Your Stored Paramenters Upgrade the Modem’s Firmware Restore Your ParametersIndex Symbols Index 106