Multi-Tech Systems MT5600BA, MT5600BL manual Back-to-Back Test

Page 102

MultiModemII User Guide

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

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 data received on the remote monitor is the same as the data entered from the remote keyboard.

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

Note: You can also start and stop a local digital loopback test by using the front panel LCD and buttons. See “Diagnostic Options Trunk” in Chapter 3.

Back-to-Back Test

This test verifies proper operation by connecting two MT5600BLs back to back using an RJ-11 cable. By using an MT5600BL that is known to be good, you can test a second MT5600BL that is suspect.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UUUUUUUUUUU

 

 

 

 

 

 

 

 

 

 

 

 

UUU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Digital Analog

Analog Digital

 

 

 

 

 

 

 

 

 

 

 

 

 

RJ-11 cable

 

 

Jumper

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Computer or Terminal

Local MultiModem

MultiModem under test

Figure C-4. Back-to-back test.

1.Connect two MT5600BLs by plugging an RJ-11 cable into their LEASED jacks.

2.Set the terminal and modems to the same serial port speed. For instance, if you are using a terminal that is limited to 9600 bps, set the modems to 9600 bps by sending the command AT$SB9600&W0 to each modem.

3.Following the instructions in Chapter 7, set both modems to two-wire leased- line mode. One should be set as the originate modem and the other as the an- swer modem, but it does not matter which is which.

4.Turn on both units and wait for carrier detect (CD).

5.On the modem under test, short pins 2 and 3 of the RS-232C connector with a paper clip or other metal device.

94

Page 101 Page 103
Image 102
Page 101 Page 103
Contents Model MT5600BA Model MT5600BL Record of Revisions FCC Part Quick Start Using the Front PanelIntroduction MultiModemII User GuideSolving Problems AT Commands, S-Registers & Result CodesRemote Configuration Callback SecurityAppendix C Loopback Tests Appendix D Warranty, Service, and Technical SupportAppendix a Regulatory Compliance Appendix E Upgrading the ModemContents Viii Introduction Features IntroductionProduct Description Introduction DataWhat Is in Your Modem Package? Related ManualsQuick Start We supply Safety WarningsWhat You Will Need You supplyDialup Connection Connect the Modem to Your SystemRS232 Connection Quick StartPower Connection Two-Wire Leased Line ConnectionFour-Wire Leased Line Connection Power-On TestInstall the Modem in Windows Adding the Modem to WindowsRemoving Your Old Modem from Windows Install and Configure Your Software Call the Multi-Tech BBS Trio DataCommWindows HyperTerminal Windows Terminal Send a Fax Trio FaxMicrosoft Fax Select Start Programs Accessories Fax Compose new fax ReferencesMultiModemII User Guide Using the Front Panel Modem Configuration LED IndicatorsOption Selection Using the Front PanelLiquid Crystal Display LCD Menu StructureMultiModemII User Guide Menu Overview Using the Front Panel Status Trunk MultiModemII User Guide Basic Options Trunk Using the Front Panel Advanced Options Trunk MultiModemII User Guide Remote Configuration Options Trunk Diagnostic Options TrunkUsing the Front Panel Phone Number Memory Options Trunk Caller ID Options TrunkMenu Options StatusUsing the Front Panel Basic Options Advanced Options ImplementedRemote Configuration Options MultiModemII User Guide Diagnostic Options Phone Number Memory OptionsCaller ID Options AT Commands Registers Result Codes Introduction AT Commands AT Commands, S-Registers, and Result CodesHook Control Echo Command Mode CharactersDS= y Dial Stored Telephone Number Information RequestReturn Online to Data Mode Monitor Speaker VolumeMonitor Speaker Mode Result Codes Enable/DisableRead Register Value Select RegisterSet Register Value Tone DialingLong Space Disconnect Modem ResetResult Code Selection Data Carrier Detect DCD ControlData Terminal Ready DTR Control Error Correction ModesLoad Factory Settings Modem-Initiated Flow ControlCommunications Mode 22bis Guard Tone ControlFlow Control Selection Clear to Send CTS Control Sync/Async ModeTest Commands Data Set Ready DSR ControlDisplay Last Connection Statistics Display Current ConfigurationStore Current Configuration Synchronous Clock SourceZy =x Store Telephone Number Select Profile for Hard ResetLine Signal Level Data Compression Control\An Maximum MNP Block Size Line Signal QualityPCM Code Selection \Bn Transmit Break\Nn Error Correction Mode Selection \Vn Single Line Connect Message+MS= Modulation Selection Reserved,maxTXrateCRMNP Extended Services Command #CBPy=x Store Callback Password Command -SDR=nDistinctive Ring ControlCommand #CBNy=x Store Callback Number Flash Memory DownloadCommand $SBn Serial Port Baud Rate Command #CID= n Caller IDCallback Enable/Disable Escape SequenceRegister Unit Range Default Description RegistersS32 S36 S46 Result Codes Terse Verbose DescriptionProtocol ALT +FCERROR MultiModemII User Guide Remote Configuration Basic Procedure SetupChanging the Remote Configuration Password Remote Configuration Changing the Remote Escape CharacterMultiModemII User Guide Callback Security Setup Procedures Turning Callback Security On and OffAssigning Callback Passwords Callback SecurityAssigning Callback Phone Numbers Calling Procedure Callback Security CommandsCommand #CBN y= x Store Callback Number Command #CBPy=x Store Callback Password Callback Assignments MultiModemII User Guide Leased Line Operation Two-Wire Setup Four-Wire Setup Leased Line OperationDial Backup and Leased Line Restoral Dial Backup and Leased Line Restoral SetupLeased Line Operation MultiModemII User Guide Solving Problems None of the Indicators Light Modem Does Not Respond to Commands Solving ProblemsModem 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 MonitorModem4Doesn’t Work with Caller ID Fax and Data4Software Can’t Run at the Same Time Appendixes Appendix a Regulatory Compliance FCC Part 68 TelecomFax Branding Statement Regulatory ComplianceCanadian Limitations Notice International Modem RestrictionsCommission Decision CTR21 EMC, Safety, and Terminal Directive Compliance New Zealand Telecom Warning NoticeAppendix B Technical Specifications Technical Specifications Receiver Sensitivity Test procedure Local Analog Loopback Test V.54 LoopLoopback Tests Remote 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 testBack-to-Back Test Figure C-5. Back-to-back test connections Limited Warranty ServiceTechnical Support Online Warranty RegistrationWarranty, Service, and Technical Support Multi-Tech BBSAbout the Internet Ordering Modem Accessories SupplyNet Online Ordering InstructionsUpgrade Overview Identify the Modem FirmwareMulti-Tech BBS Identify the Current Firmware VersionMulti-Tech Web Site Upgrading the ModemDownload the Upgrade File Extract the Upgrade FilesSet the Modem to the Factory Defaults Upgrade the Modem’s Firmware Restore Your ParametersAppendix F Cable Pinouts RS-232 PinoutsLeased Line Pinouts Cable PinoutsAppendix G Ascii Character Map Ctrl Code Hex DecIndex 108 Index 110
Related manuals
Manual 12 pages 16.1 Kb
Top Page Image Contents