Multitech MT5634ZBA-GLOBAL, MT5634ZBA-V-V92, MT5634ZBA-SERIES manual

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Chapter 7 – Troubleshooting
• Your communication software settings may not match the physical port to which the modem is connected. The serial cable might be plugged into the wrong connector—check your computer documentation to make sure. Or you might have selected a COM port in your software other than the one the modem is physically connected to—compare the settings in your software to the physical connection.
• If the modem is on, the cable is plugged into the correct port, the communication software is configured correctly, and you still don’t get an OK, the fault might be in the serial cable. Make sure it is firmly connected at both ends.
• Is this the first time you have used the cable? If so, it may not be wired correctly. Check the cable description on the packaging to make sure the cable is the right one for your computer.
• Peripheral expansion cards, such as sound and game cards, might include a serial port preconfigured as COM1 or COM2. The extra serial port, or the card itself, may use the same COM port, memory address, or interrupt request (IRQ) as your communication port. Be sure to disable any unused ports.
Windows 9x: Right-click on My Computer, select Properties from the menu, click on the Device Manager tab, double-click on Ports, then double-click on the communication port your modem is connected to. In the port’s Properties sheet, click on the Resources tab to see the port’s input/output range and interrupt request. If another device is using the same address range or IRQ, it appears in the Conflicting Device List. Uncheck Use automatic settings to change the port’s settings so they do not conflict with the other device, or select the port the conflicting device is on and change it instead. If you need to open your computer to change switches or jumpers on the conflicting device, refer to the device’s documentation.
Windows NT 4.0: To look for address or IRQ conflicts, click Start, Programs, Administrative Tools (Common), and Windows NT Diagnostics. In the Windows NT Diagnostics dialog box, click the Resources tab to see which input/output ranges and interrupt requests are in use. If you need to open your computer to change switches or jumpers on the conflicting device, refer to the device’s documentation.
• The serial port might be defective. If you have another serial port, install the modem on it, change the COM port setting in your software, and try again.
• The modem might have a problem beyond the scope of this user guide. If you have another Multi-Tech modem, try the other modem (if there is no problem with the other modem, call Technical Support for assistance. See Appendix F for phone numbers).
The Modem Cannot Connect When Dialing
There can be several reasons the modem fails to make a connection. Possibilities include

•lack of a physical connection to the telephone line.

•a wrong dial tone.

•a busy signal.

•a wrong number.

•no modem at the other end.

•a faulty modem, computer, or software at the other end.

•incompatibility between modems

•poor line conditions.

You can narrow the list of possibilities by using extended result codes. Extended result codes are enabled by default. If they have been disabled, include V1X4 in the modem’s initialization string, or in terminal mode enter ATV1X4 and press ENTER. When you dial again, the modem reports the call’s progress.

•If the modem reports NO DIALTONE, check that the modem’s telephone line cable is connected to both the modem’s LINE jack (not the PHONE jack) and the telephone wall jack. If the cable looks secure, try replacing it. If that doesn’t work, the problem might be in your building’s telephone installation. To test the building installation, plug a telephone into your modem’s telephone wall jack and listen for a dial tone. If you hear a dial tone, your modem might be installed behind a corporate phone system (PBX) with an internal dial tone that sounds different from the normal dial tone. In that case, the modem might not recognize the dial tone and might treat it as an error. Check your PBX manual to see if you can change the internal dial tone. If you can’t, change your modem’s initialization string to replace X4 with X3, which will cause the modem to ignore dial tones.

•If the modem reports BUSY, the other number might be busy, in which case you should try again later. However, it might indicate that you have failed to add a 9, the prefix to the phone number if you must dial 9 for an outside line.

If you must dial 9 to get an outside line, the easiest way to dial it automatically is to include it in the modem’s dial prefix; e.g., ATDT9. Note the comma, which inserts a pause before the number is dialed. By inserting 9, into the dial prefix, you do not have to include it in each directory entry.

To change the dial prefix in Windows HyperTerminal, select Connect from the Call menu, click Dialing Properties, and type 9 in the local and long distance boxes in How I dial from this location.

Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G)

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Contents MultiModem ZBA MultiModem ZBA MT5634ZBA-Series User Guide Table of Contents Table of Contents Introduction Features TableFeatures Specific to Safety Warnings InstallationChange the Internal Jumpers Opening the ModemChanging the Voice Jumper Global Connections Connect the Modem to Your PCNon-Global Connection Connect the Modem to the AC Power Outlet Connect the Two-Wire Leased Line Leased Line OnlyPower-On Test Connect the Modem to Your PCInstalling the Modem Driver Install the Modem DriverUsing AT Commands to Configure Your Modem Using the Global Wizard to Configure Your ModemModem Serial Speed Guidelines Configure the modem for best performanceAbout the Front Panel OperationLeased-Line Operation SetupOperation Connecting to the Internet AT Commands, S- Registers, and Result Codes Basic Procedure Remote ConfigurationSetup Changing the Setup PasswordCallback Security Changing the Setup PasswordTurning Callback Security On and Off Assigning Callback Passwords and Phone Numbers Setting Callback Security Message ParityCalling Procedures Password-Only CallbackExtension-Entry Callback Number-Entry CallbackDirect Connection Callback Security CommandsCallback Assignments Form None of the Indicators Light TroubleshootingModem Does Not Respond to Commands Page Page There Are Garbage Characters on the Monitor Data Is Being LostModem Doesn’t Work with Caller ID Fax and Data Software Can’t Run at the Same TimeFax Data Rates Appendix a Technical SpecificationsReceiver Sensitivity Appendix B Upgrading the Modem’s Firmware Upgrade OverviewIdentify the Modem Firmware Identify the Current Firmware VersionExtract the Upgrade Files Download the Upgrade FileUpgrade the Modem’s Firmware Restore Your ParametersFCC Part 15 Regulation Appendix C Regulatory ComplianceFCC Part 68 Telecom Canadian Limitations Notice EMC, Safety and R&TTE Directive ComplianceIndustry Canada International Modem RestrictionsSouth African Statement New Zealand Telecom Warning NoticeWeee Waste Electrical and Electronic Equipment Statement Appendix D Waste Electrical and Electronic EquipmentSetup Appendix E Installing a Modem under LinuxConnecting to a Cisco Router Console Port Appendix F Connecting to a Cisco RouterConsole Port Connections Remote ConfigurationAppendix G Rohs HT/TS Substance Concentration Caller ID IndexIndex

MT5634ZBA-GLOBAL, MT5634ZBA-V-V92, MT5634ZBA-SERIES, MT5634ZBA specifications

The Multitech MT5634ZBA series is a line of high-performance 56K modems that have been engineered for reliable data transmission over telephone lines. This series includes models such as the MT5634ZBA, MT5634ZBA-SERIES, MT5634ZBA-V-V92, and MT5634ZBA-GLOBAL, each catering to different communication needs while maintaining a commitment to quality and efficiency.

One of the standout features of the MT5634ZBA series is its support for the V.92 protocol. This technology significantly enhances the modem's performance by allowing faster upload speeds compared to its predecessors. With V.92, users can enjoy uploads at speeds up to 48Kbps, which is particularly beneficial for those who frequently send large files or engage in video conferencing. Furthermore, the V.92 protocol supports features like modem-on-hold, enabling users to receive incoming calls without disconnecting their internet session.

Another notable characteristic of the MT5634ZBA series is its globally compatible design. The MT5634ZBA-GLOBAL version has been adapted to work with various international telecommunications standards, making it an excellent choice for businesses and individuals who require a reliable connection across different countries. This international usability ensures that users can connect seamlessly, regardless of location.

The MT5634ZBA modems also feature advanced error correction and data compression technologies, such as MNP2-4 error control, and V.42 bis compression. These technologies work together to improve data integrity and enhance the overall throughput of the modem, resulting in a more efficient and reliable connection.

In terms of hardware, the MT5634ZBA series modems are built with robust components that ensure longevity and consistent performance. They are equipped with standard serial interface ports that allow easy integration with various devices, such as computers, point-of-sale systems, and other communication equipment.

In summary, the Multitech MT5634ZBA series represents a significant advancement in modem technology, combining speed, reliability, and global adaptability. With its support for V.92, comprehensive error correction, and high-level data handling capabilities, the MT5634ZBA series is an ideal choice for users seeking efficient and effective communication solutions, whether at home or in business environments.
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