Black Box MD403A user manual Troubleshooting, None of the Indicators Light

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CHAPTER 6: Troubleshooting

6. Troubleshooting

Your modem was thoroughly tested at the factory before it was shipped. If you are unable to make a successful connection, or if you experience data loss or garbled characters during your connection, the modem might be defective. However, it is more likely that the source of your problem lies elsewhere. The following symptoms are typical of problems you might encounter:

•None of the LEDs light when the modem is on.

•The modem does not respond to commands.

•The modem dials but is unable to make a connection.

•The modem disconnects while online.

•The modem cannot connect when answering.

•The modem doesn’t work with Caller ID.

•Fax and data software can’t run at the same time.

If you experience problems, please check the following possibilities before calling Technical Support.

6.1 None of the Indicators Light

When you plug in the modem, the operating system detects and configures the modem, and the TR LED should come on.

If the TR LED does not come on, check to see that the software from the Modem Installation CD has been installed.

6.2 The Modem Does Not Respond to Commands

•Make sure you are issuing the modem commands from the data communications software, either manually in terminal mode or automatically by configuring the software. (You cannot send commands to the modem from the DOS prompt.)

•Make sure you are in terminal mode in your data communications program, then type AT and press ENTER. If you get an OK response, your connections are good and the problem likely is in the connection setup in your communications software.

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Contents Portable USB Modem Users’ Manual FCC and IC RFI Statements EMC, Safety and R&TTE Directive Compliance FCC Requirements for Telephone-Line Equipment Certification Notice for Equipment Used in Canada NOM Statement Portable USB Modem Trademarks Used in this Manual Contents Contents Specifications Command Buffer 40 charactersFrequency Stability ±0.01% AGC Dynamic Range 43 dBTemperature Tolerance 32 to 120F 0 to 50C Introduction OverviewUniversal Serial Bus USB What the Package IncludesWhat Can You Do with Your Modem? Features Required Equipment USB and communications connectors ConnectionsFront Panel Front panelInstallation Connect the Modem to Your SystemInstalling the Modem Welcome screen Install Hardware Device Drivers screen Locate Driver Files screen Driver Files Search Results screen Click Yes to continue with the installation Digital Signature Not Found screen appearsCompletion screen Installation in Windows ME Portable USB Modem Add New Hardware Wizard screen What do you want Windows to do? screen 10. Windows will search for a new driver screen 11. Updated driver found screen 12. Verification screen 13. Finish screen Click Start Settings Control Panel Go to Start Settings Control PanelConfiguring the Modem for Your Country References AT Commands, S-Registers, and Result Codes AT CommandsRepeat Last Command Communication Standard SettingEnter Key AnswerDial Carrier ControlATDT1028807637853500$123456789 Echo Command Mode Characters DS=y Dial Stored Telephone NumberEcho Online Data Characters Hook ControlMonitor Speaker Mode Return Online to Data ModeModulation Handshake Pulse DialingResult Codes Enable/Disable Sr=n Set Register ValueSr? Read Register Value Tone DialingModem Reset Result Code SelectionLong Space Disconnect Auto RetrainLoad Factory Settings Data Carrier Detect DCD ControlON/X-OFF Pacing Control 22bis Guard Tone ControlAsynchronous Communications Mode Test CommandsFlow Control Selection Data Set Ready DSR ControlDisplay Current Settings Store Current ConfigurationSelect Stored Configuration for Hard Reset Zy=x Store Dialing Command\Bn Transmit Break \Gn Modem Port Flow Control\Jn Data Buffer Control \Kn Break ControlOnline command mode. The modem receives a \Nn Error Correction Mode Selection\Tn Inactivity Timer \Qn Flow Control Selection\Vn Protocol Result Code \Xn ON/X-OFF Pass-ThroughAdaptive Answer Result Code Enable #Sx Enter Setup PasswordView Numbers in Blacklist Data Compression Control#S=x Atcr Remote Configuration Escape Sequence+++ATCR Escape Sequence Unit Range Default Description RegistersSeconds 255 Unit Range Default Description Upstream data rates S48=7 S48=128 Result Codes Verbose DescriptionConnected at 2400 bps Terse Verbose Description Remote Configuration Basic ProcedureSetup IntroductionChanging the Setup Password None of the Indicators Light TroubleshootingModem Does Not Respond to Commands Modem Dials But Cannot Connect Modem Disconnects While Online Modem Doesn’t Work with Caller ID Modem Cannot Connect When AnsweringFax and Data Software Can’t Run at the Same Time Calling Black Box Shipping and PackagingV.90 Troubleshooting Appendix A. V.90 SupportAppendix B. Loopback Tests Local Analog Loopback Test V.54 Loop Figure B-1. Local analog loopback testRemote Digital Loopback Test V.54 Loop Figure B-2. Remote digital loopback testLocal Digital Loopback Test V.54 Loop Figure B-3. Local digital loopback testAppendix B Loopback Tests Appendix C. Dial-Up Networking Windows 98/Me Dial-Up Networking Figure C-3. Dial-Up connection created Figure C-4. Networking tab Figure C-5. TCP/IP Settings dialog box Windows 2000 Dial-Up Networking Figure C-6. Network Connection Wizard dialog boxFigure C-7. Network Connection Type dialog box Figure C-8. Welcome to the Internet World Connection Wizard Internet account connection, and click Next If you select Accept incoming connectionsIf you select Connect directly to another computer Upgrade Overview Appendix D. Upgrading ModemAppendix D Upgrading the Modem Copyright 2004. Black Box Corporation. All rights reserved
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MD403A specifications

The Black Box MD403A is a powerful and versatile device widely recognized for its advanced technology and its ability to streamline data communication. Ideal for both personal and professional use, the MD403A is designed to cater to various environments, from small offices to larger enterprises.

One of the main features of the MD403A is its robust connectivity options. It supports multiple interfaces, including USB, HDMI, and Ethernet, allowing seamless integration with various devices such as computers, projectors, and IP networks. This flexibility makes it a popular choice for businesses that require reliable data transmission across different platforms.

The device is equipped with advanced signal processing capabilities that ensure high-quality data transfer. Utilizing cutting-edge technology, the MD403A minimizes signal loss, thereby enhancing performance and ensuring that the transmitted data remains intact. This feature is particularly crucial in scenarios where large amounts of data need to be transmitted quickly and without loss of quality.

Another significant characteristic of the Black Box MD403A is its user-friendly design. The interface is intuitive, making it easy for users of all technical abilities to navigate the system effortlessly. It typically comes with a straightforward setup process, minimizing downtime and allowing users to get up and running quickly.

The MD403A also boasts advanced security features. It employs multiple encryption protocols to safeguard sensitive information during transmission. With increased cybersecurity concerns, this feature is essential for businesses that handle confidential data, ensuring compliance with various regulatory requirements.

Additionally, the device supports various video resolutions, making it suitable for both standard and high-definition applications. This feature is particularly beneficial for users who want to deliver high-quality presentations or video content without compromising on clarity.

In terms of durability, the MD403A has a sturdy design that can withstand the rigors of daily use. Its compact form factor allows for easy portability, making it an ideal choice for professionals who are always on the move.

In summary, the Black Box MD403A combines advanced features, multiple connectivity options, robust security, and ease of use, making it an essential tool for modern communication needs. Its adaptability and performance make it a preferred choice for users seeking reliable data transfer solutions in diverse settings.
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