Multi-Tech Systems MT9234ZBA-V manual

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Chapter 6– Troubleshooting
The Modem Disconnects While Online
• If you are not using Modem on Hold, Call Waiting can interrupt your connection when someone tries to call you. If you have Call Waiting service, disable it before each call. In most telephone areas in North America, you can disable Call Waiting by preceding the telephone number with *70 (but first check with your local telephone company).
You can automatically disable Call Waiting by including the disabling code in the modem’s dial prefix (e.g., ATDT*70, – note the comma, which inserts a pause before the number is dialed). To change the dial prefix in Windows 98 HyperTerminal, select Connect from the Call menu, click Dialing Properties, check This location has Call Waiting, and select the correct code for your phone service.
If you have extension phones on the same line as your modem, you or someone else can interrupt the connection by picking up another phone. If this is a frequent problem, disconnect the extension phones before using the modem, or install another phone line especially for the modem.
• Check for loose connections between the modem and the computer, the telephone jack, and AC power.
• You might have had a poor connection because of line conditions or the problem might have originated on the other end of the line. Try again.
• Your ISP might have hung up on you because of lack of activity on your part or because you exceeded your time limit for the day. Try again.
Modem Cannot Connect When Answering
• The default DTR Control command (&D2) inhibits autoanswer. To enable autoanswer, change DTR Control to &D0, and make sure &Q0, &Q5, or &Q6 is also set. For more information, see the &D command in the AT Commands Reference Guide. For information on changing the modem’s default configuration, refer to the &D command in the AT Commands Reference Guide.
• Autoanswer might be disabled. Turn on autoanswer in your communications program or send the command ATS0=1 (ATS0=2 if you have Caller ID service) to your modem in terminal mode.
File Transfer Is Slower Than It Should Be

•If you are using a slow transfer protocol, such as Xmodem, try Zmodem or Ymodem/G instead.

•Is your line noisy? If there is static on your line, the modem has to resend many blocks of data to insure accuracy. You must have a clean line for maximum speed.

•Are you downloading a compressed file with MNP 5 hardware compression enabled? Since hardware data compression cannot compress a file already compressed by an archiving program, the transfer can be marginally slower with data compression enabled than with it disabled.

•Does your Internet service provider (ISP) use the same 56K protocol as your modem? The default setting of your modem is to connect using either the V.92 or the V.90 protocol, depending on which one the ISP’s modem is using. If your ISP uses the V.90 protocol, the maximum speed you will be able to upload at is 33,600 bps. Check with your ISP to see which protocols it supports.

•Are you trying to send a file to another client modem? If so, then your maximum possible connect speed is 33,600 bps. You can upload at speeds up to 48,000 bps only when connected to an ISP that supports the V.92 protocol.

•Try entering the I11 command in online mode or the &V command in command mode to display information about the last connection, making a screen print of the connection statistics, and checking for parameters that might be unacceptable.

Multi-Tech Systems, Inc. MT9234ZBA-Series User Guide (S000387C)

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Contents MultiModem ZBA Trademarks PN S000387C, Version C CopyrightPatents World HeadquartersContents Features AT Commands InfoIntroduction CE Mark Technical SpecificationsSafety Warnings InstallationChange the Internal Jumpers Opening the ModemChanging the Voice Jumper Connect the Modem to Your PC Power-On Test Connect the Modem to the AC Power OutletInstall the Modem Driver Windows InstallerPage Using the Global Wizard to Configure Your Modem Configure the Modem for Your Country or RegionUsing AT Commands to Configure Your Modem Click Initial Setup and Country/Region SelectionConnecting to the Internet SetupOperation About the Front PanelRemote Configuration Changing the Setup PasswordChanging the Remote Escape Character Changing the Setup Password Callback SecurityTurning Callback Security On and Off Assigning Callback Passwords and Phone Numbers Setting Callback Security Message ParityCalling Procedures Password-Only CallbackNumber-Entry Callback Direct Connection Extension-Entry CallbackCallback Assignments Form Callback Security CommandsTroubleshooting None of the Indicators LightModem Does Not Respond to Commands Modem Cannot Connect When Dialing 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 TimeAppendix a Upgrading the Modem’s Firmware Download the Upgrade FileIdentify the Modem Firmware Identify the Current Firmware VersionUpgrade the Modem’s Firmware Extract the Upgrade FilesRestore Your Parameters Clear Your Stored ParametersAppendix B Regulatory Compliance FCC Part 15 RegulationFCC Part 68 Telecom Canadian Limitations Notice EMC, Safety and R&TTE Directive ComplianceIndustry Canada Thailand ApprovalNew Zealand Telecom Warning Notice South African StatementJapan Requirements Special phone cable is required for regulatory compliance Brazil Special Cable for MT9234ZBA model onlyAppendix C Environmental Information Weee Waste Electrical and Electronic Equipment StatementReach Statement Appendix C Environmental Info CR6+ Rohs HT/TS Substance ConcentrationAppendix D Installing a Modem under Linux Appendix E Connecting to a Cisco Router Configure the Modem for your Country or RegionConfigure for Callback Security in Direct Connect Mode Console Port Final Setup Remote ConfigurationConsole Port Connections Index AT commands
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MT9234ZBA-V, MT9234ZBA specifications

Multi-Tech Systems has long been a trusted name in the field of communication technology, and its MT9234ZBA and MT9234ZBA-V modem products exemplify the company's commitment to delivering robust and reliable connectivity solutions. These modems are ideal for a range of applications, including telephony, data communication, and remote monitoring, making them a versatile choice for both personal and professional use.

One of the standout features of the MT9234ZBA and MT9234ZBA-V is their high-speed data transmission capabilities. Both models support data rates of up to 56 Kbps, ensuring efficient and swift data transfer for various applications. This allows users to experience minimal latency during downloads and uploads, appealing to those who depend on timely and reliable data delivery.

These modems utilize advanced technologies, such as V.92 and V.90 protocols, which enable users to benefit from features like quick connect, thereby reducing the time it takes to establish a connection. Additionally, the modems support both analog and digital lines, making them adaptable for different environments and infrastructures.

Another notable characteristic of the MT9234ZBA and MT9234ZBA-V modems is their compatibility with a wide range of operating systems, including various versions of Windows, Linux, and Mac OS. This cross-platform support ensures that users can easily integrate these modems into their existing software environments without encountering significant compatibility issues.

The design and construction of these modems are also worth mentioning. They are compact and lightweight, making them easy to install and reposition as needed. Their robust construction ensures longevity, which is crucial for users in environments where durability is paramount.

For those concerned about security, Multi-Tech Systems has integrated multiple security features within these modems. This includes support for encryption protocols, ensuring that data transmitted over the modem remains secure and protected from unauthorized access.

In conclusion, the MT9234ZBA and MT9234ZBA-V by Multi-Tech Systems represent an excellent choice for anyone in need of reliable and high-speed modem solutions. With their advanced features, compatibility with various operating systems, and emphasis on security, these modems stand out in the crowded telecommunications market. Whether for home use or in a professional setting, the MT9234ZBA and MT9234ZBA-V offer robust solutions for modern communication needs.
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