Multi-Tech Systems MT5600BL, MT5600BA specs

C Loopback Tests

6.Enter data from your keyboard. Typing multiple uppercase U characters is a good way to send an alternating test pattern of binary ones and zeroes. Data re- ceived by the remote modem enters its analog receiver, is converted to digital data, is reconverted into analog, and then is transmitted back to your modem. Your modem passes this test if the data received on your monitor is the same as the data entered from your keyboard.

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

Modem	PHONE	LINE LEASED
Modem		EIA RS232C
		EIA RS232C
under test		VOLUME

Jumper pins 2 and 3.

POWER

Local modem

PHONE LINE LEASED

EIA RS232C

VOLUME

POWER

Figure C-5. Back-to-back test connections.

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Image 103

Multi-Tech Systems MT5600BL, MT5600BA manual Figure C-5. Back-to-back test connections

Contents

Model MT5600BA Model MT5600BL Record of Revisions FCC Part MultiModemII User Guide Using the Front PanelIntroduction Quick Start Callback Security AT Commands, S-Registers & Result CodesRemote Configuration Solving Problems Appendix E Upgrading the Modem Appendix D Warranty, Service, and Technical SupportAppendix a Regulatory Compliance Appendix C Loopback Tests Contents Viii Introduction Introduction FeaturesProduct Description Data Introduction Related Manuals What Is in Your Modem Package? Quick Start You supply Safety WarningsWhat You Will Need We supply Quick Start Connect the Modem to Your SystemRS232 Connection Dialup Connection Power-On Test Two-Wire Leased Line ConnectionFour-Wire Leased Line Connection Power Connection Adding the Modem to Windows Install the Modem in WindowsRemoving Your Old Modem from Windows Install and Configure Your Software Trio DataComm Call the Multi-Tech BBS Windows HyperTerminal Windows Terminal Trio Fax Send a FaxMicrosoft Fax References Select Start Programs Accessories Fax Compose new fax MultiModemII User Guide Using the Front Panel LED Indicators Modem Configuration Menu Structure Using the Front PanelLiquid Crystal Display LCD Option Selection MultiModemII User Guide Menu Overview Using the Front Panel Status Trunk MultiModemII User Guide Basic Options Trunk Using the Front Panel Advanced Options Trunk Diagnostic Options Trunk MultiModemII User Guide Remote Configuration Options Trunk Caller ID Options Trunk Using the Front Panel Phone Number Memory Options Trunk Status Menu Options Using the Front Panel Basic Options Implemented Advanced Options Remote Configuration Options Phone Number Memory Options MultiModemII User Guide Diagnostic OptionsCaller ID Options AT Commands Registers Result Codes Introduction AT Commands, S-Registers, and Result Codes AT Commands Information Request Echo Command Mode CharactersDS= y Dial Stored Telephone Number Hook Control Result Codes Enable/Disable Monitor Speaker VolumeMonitor Speaker Mode Return Online to Data Mode Tone Dialing Select RegisterSet Register Value Read Register Value Data Carrier Detect DCD Control Modem ResetResult Code Selection Long Space Disconnect Modem-Initiated Flow Control Error Correction ModesLoad Factory Settings Data Terminal Ready DTR Control 22bis Guard Tone Control Communications ModeFlow Control Selection Data Set Ready DSR Control Sync/Async ModeTest Commands Clear to Send CTS Control Synchronous Clock Source Display Current ConfigurationStore Current Configuration Display Last Connection Statistics Data Compression Control Select Profile for Hard ResetLine Signal Level Zy =x Store Telephone Number \Bn Transmit Break Line Signal QualityPCM Code Selection \An Maximum MNP Block Size \Vn Single Line Connect Message \Nn Error Correction Mode Selection Reserved,maxTXrateCR +MS= Modulation Selection MNP Extended Services Flash Memory Download Command -SDR=nDistinctive Ring ControlCommand #CBNy=x Store Callback Number Command #CBPy=x Store Callback Password Escape Sequence Command #CID= n Caller IDCallback Enable/Disable Command $SBn Serial Port Baud Rate Registers Register Unit Range Default Description S32 S36 S46 Terse Verbose Description Result Codes Protocol ALT +FCERROR MultiModemII User Guide Remote Configuration Setup Basic ProcedureChanging the Remote Configuration Password Changing the Remote Escape Character Remote Configuration MultiModemII User Guide Callback Security Turning Callback Security On and Off Setup Procedures Callback Security Assigning Callback Passwords Assigning Callback Phone Numbers Callback Security Commands Calling ProcedureCommand #CBN y= x Store Callback Number Command #CBPy=x Store Callback Password Callback Assignments MultiModemII User Guide Leased Line Operation Two-Wire Setup Leased Line Operation Four-Wire Setup Dial Backup and Leased Line Restoral Setup Dial Backup and Leased Line Restoral Leased Line Operation MultiModemII User Guide Solving Problems None of the Indicators Light Solving Problems Modem Does Not Respond to Commands Modem Dials But Cannot Connect Modem4Disconnects While Online File Transfer4Is Slower Than It Should Be Modem4Cannot Connect When Answering There Are Garbage4 Characters on the Monitor Data Is Being LostModem4Doesn’t Work with Caller ID Fax and Data4Software Can’t Run at the Same Time Appendixes FCC Part 68 Telecom Appendix a Regulatory Compliance Regulatory Compliance Fax Branding Statement International Modem Restrictions Canadian Limitations NoticeCommission Decision CTR21 New Zealand Telecom Warning Notice EMC, Safety, and Terminal Directive Compliance Appendix B Technical Specifications Technical Specifications Receiver Sensitivity Local Analog Loopback Test V.54 Loop Test procedureLoopback Tests Figure C-2. Remote digital loopback test Remote Digital Loopback Test V.54 Loop Figure C-3. Local digital loopback test Local Digital Loopback Test V.54 Loop Back-to-Back Test Figure C-5. Back-to-back test connections Service Limited Warranty Multi-Tech BBS Online Warranty RegistrationWarranty, Service, and Technical Support Technical Support About the Internet SupplyNet Online Ordering Instructions Ordering Modem Accessories Identify the Modem Firmware Upgrade Overview Upgrading the Modem Identify the Current Firmware VersionMulti-Tech Web Site Multi-Tech BBS Extract the Upgrade Files Download the Upgrade FileSet the Modem to the Factory Defaults Restore Your Parameters Upgrade the Modem’s Firmware RS-232 Pinouts Appendix F Cable Pinouts Cable Pinouts Leased Line Pinouts Ctrl Code Hex Dec Appendix G Ascii Character Map Index 108 Index 110