Multi-Tech Systems MT5600DSVD manual MultiModemDSVD User Guide Loopback Tests

Page 72

MultiModemDSVD User Guide

C Loopback Tests

3.Type the escape sequence +++AT and press ENTER to bring your modem into online command mode.

4.Type AT&T3 and press ENTER. Once you receive an OK message from your mo- dem (if responses are enabled), your modem is placed in digital loopback mode.

5.Have someone enter data from the remote 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 data received by your modem enters its analog receiver, is converted to digital data, is reconverted into analog, and then is transmitted back to the remote modem. Your modem passes this test if the characters re- ceived on the remote monitor are the same as those entered from the remote keyboard.

6.To exit the test, turn off the modems.

67

Image 72

Contents Page Record of Revisions Introduction AT Commands, S-Registers & Result Codes Appendix E Upgrading the Modem Introduction Features IntroductionProduct Description Data What Is in Your Modem Package? Related ManualsInstallation Safety Warnings What You Will NeedWe supply You supplyMount the Feet Change the Speaker JumperOpening the Modem Changing the Speaker Jumper Location of speaker jumperConnect the Modem to Your System RS232 ConnectionLine Connection Power Connection Power-On TestPhone Connection Microphone ConnectionInstall the Modem Driver Installing the Modem DriverRemoving Your Old Modem Driver Install and Configure Your Software Operation Front Panel Configuring the Modem Connecting to the InternetTo install and run Dial-Up Networking in Windows 95 or To dial your Internet access providerDial-Up Networking Dial-Up Networking in Windows 95/98To install Dial-Up Networking Dial-Up Networking in Windows MeDial-Up Networking in Windows NT Select Start Settings Network and Dial-up Connections Dial-Up Networking in WindowsTo Originate a Voice Call in Speakerphone Mode Fax OperationVoice Operation To Answer a Voice Call in Speakerphone Mode To Originate a Dsvd Call Using the HeadsetTo Answer a Dsvd Call Using the Headset References AT Commands Registers Result Codes AT Commands AT Command Summary Echo Command Mode Characters DS=y Dial Stored Telephone NumberHook Control Information RequestMonitor Speaker Volume Monitor Speaker ModeDisplay Legacy Parameters Modulation HandshakeReturn Online to Data Mode Result Codes Enable/DisablePulse Dialing Select RegisterModem Reset Connect Message ControlResult Code Selection Long Space DisconnectError Correction Modes Data Carrier Detect DCD ControlData Terminal Ready DTR Control Modem-Initiated Flow ControlLoad Factory Settings 42bis Data Compression22bis Guard Tone Control Telephone Jack ControlCommunications Mode Asynchronous Communications ModeTest Commands Pulse Dial Make/Break RatioDisplay Current Configuration Store Current ConfigurationSelect Profile for Hard Reset Display Last Connection StatisticsLine Signal Level Line Signal QualityZy=x Store Telephone Number Data Compression ControlPCM Code Selection \An Maximum MNP Block Size\Bn Transmit Break \Kn Break Control\Nn Error Correction Mode Selection \Vn Single Line Connect MessageModulation Selection SubparametersMNP Extended Services Command #CID=n Caller ID Distinctive Ring ControlFlash Memory Download Voice Commands Command $SBn Serial Port Baud RateCommand +++ATCR Escape Sequence Command -SMS=nData/DSVD ModeDsvd Enable/Disable Command #BDR=n Baud Rate SelectCommand #CLS=n Data, Fax, or Voice/Audio Select Command #MDL? Identify ModelRegister Unit Range Default Description RegistersS32 S37 Register Unit Range Default Description S86 Result Codes Terse Verbose DescriptionProtocol ALT +FCERROR Solving Problems None of the Indicators Light Modem Does Not Respond to Commands LightModem Dials But Cannot Connect Modem4Disconnects While Online Modem4Cannot Connect When Answering File Transfer4Is Slower Than It Should BeData Is Being Lost There Are Garbage4 Characters on the Monitor Modem4Doesn’t Work with Caller IDFax and Data4Software Can’t Run at the Same Time Appendixes Appendix a Regulatory Compliance FCC Part 68 TelecomFCC Part Industry CanadaFax Branding Statement Canadian Limitations NoticeEMC, Safety, and R&TTE Directive Compliance International Modem RestrictionsNew Zealand Telecom Warning Notice South African Notice Appendix B Technical Specifications MultiModemDSVD User Guide Technical Specifications Voice Compression 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 testMultiModemDSVD User Guide Loopback Tests Limited Warranty Online Warranty RegistrationService North American ProductsTechnical Support International ProductsOrdering Accessories Internet SitesUpgrade Overview Identify the Modem FirmwareDownload the Upgrade File Extract the Upgrade FilesIdentify the Current Firmware Version Clear Your Stored ParamentersUpgrade the Modem’s Firmware Restore Your ParametersIndex MultiModemDSVD User Guide Index MultiModemDSVD User Guide Index MultiModemDSVD User Guide Index