Black Box MD403A user manual Modem Dials But Cannot Connect

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PORTABLE USB MODEM

Try resetting your modem by unplugging the USB cable from the modem, and then plugging it back in.

Try rebooting the computer.

The modem might be defective. If you have another Portable USB Modem, try swapping modems. If the problem goes away, the first modem is possibly defective. Call Tech Support for assistance.

6.3 The Modem Dials But Cannot Connect

There can be several reasons that the modem fails to make a connection. Possibilities include:

lack of a physical connection to the telephone line.

incompatibility between modems.

a busy signal.

a wrong number.

no modem at the other end.

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

You can narrow the list of possibilities by using extended result codes. Extended result codes are enabled by default. If they have been disabled, enter ATV1X4 and press ENTER while in terminal mode, or include V1X4 in the modem’s initialization string. When you dial again, the modem will report 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 company 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 (note, however, that X3 is not allowed in some countries, such as France and Spain).

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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 Command Buffer 40 characters SpecificationsAGC Dynamic Range 43 dB Frequency Stability ±0.01%Temperature Tolerance 32 to 120F 0 to 50C Overview IntroductionWhat Can You Do with Your Modem? What the Package IncludesUniversal Serial Bus USB Features Required Equipment Connections USB and communications connectorsFront panel Front PanelConnect the Modem to Your System InstallationInstalling the Modem Welcome screen Install Hardware Device Drivers screen Locate Driver Files screen Driver Files Search Results screen Digital Signature Not Found screen appears Click Yes to continue with the installationCompletion 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 Go to Start Settings Control Panel Click Start Settings Control PanelConfiguring the Modem for Your Country References AT Commands AT Commands, S-Registers, and Result CodesCommunication Standard Setting Repeat Last CommandEnter Key AnswerATDT1028807637853500$123456789 Carrier ControlDial DS=y Dial Stored Telephone Number Echo Command Mode CharactersEcho Online Data Characters Hook ControlReturn Online to Data Mode Monitor Speaker ModeModulation Handshake Pulse DialingSr=n Set Register Value Result Codes Enable/DisableSr? Read Register Value Tone DialingResult Code Selection Modem ResetLong Space Disconnect Auto RetrainData Carrier Detect DCD Control Load Factory SettingsON/X-OFF Pacing Control 22bis Guard Tone ControlTest Commands Asynchronous Communications ModeFlow Control Selection Data Set Ready DSR ControlStore Current Configuration Display Current SettingsSelect Stored Configuration for Hard Reset Zy=x Store Dialing Command\Gn Modem Port Flow Control \Bn Transmit Break\Jn Data Buffer Control \Kn Break Control\Nn Error Correction Mode Selection Online command mode. The modem receives a\Qn Flow Control Selection \Tn Inactivity Timer\Vn Protocol Result Code \Xn ON/X-OFF Pass-Through#Sx Enter Setup Password Adaptive Answer Result Code EnableView Numbers in Blacklist Data Compression Control+++ATCR Escape Sequence Atcr Remote Configuration Escape Sequence#S=x Registers Unit Range Default DescriptionSeconds 255 Unit Range Default Description Upstream data rates S48=7 S48=128 Verbose Description Result CodesConnected at 2400 bps Terse Verbose Description Basic Procedure Remote ConfigurationSetup IntroductionChanging the Setup Password Modem Does Not Respond to Commands TroubleshootingNone of the Indicators Light Modem Dials But Cannot Connect Modem Disconnects While Online Fax and Data Software Can’t Run at the Same Time Modem Cannot Connect When AnsweringModem Doesn’t Work with Caller ID Shipping and Packaging Calling Black BoxAppendix A. V.90 Support V.90 TroubleshootingAppendix B. Loopback Tests Figure B-1. Local analog loopback test Local Analog Loopback Test V.54 LoopFigure B-2. Remote digital loopback test Remote Digital Loopback Test V.54 LoopFigure B-3. Local digital loopback test Local Digital Loopback Test V.54 LoopAppendix 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 Figure C-6. Network Connection Wizard dialog box Windows 2000 Dial-Up NetworkingFigure C-7. Network Connection Type dialog box Figure C-8. Welcome to the Internet World Connection Wizard If you select Accept incoming connections Internet account connection, and click NextIf you select Connect directly to another computer Appendix D. Upgrading Modem Upgrade OverviewAppendix 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.