Multi-Tech Systems MT5600BA-V92 manual Modem Does Not Respond to Commands

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Chapter 7 – Troubleshooting

The Modem Does Not Respond to Commands

•Make sure the modem is plugged in and turned on. (See “None of the Indicators Light.”)

•Make sure you are issuing the modem commands from data communication software, either manually in terminal mode or automatically by configuring the software.

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

•Try resetting your modem by turning it off and on.

•If you don’t get an OK, the problem may still be in the communication software. Make sure you have done whatever is necessary in your software to make a port connection. Not all communication programs connect to the COM port automatically. Some connect when the software loads and remain connected until the program terminates. Others can disconnect without exiting the program. The modem’s TR indicator lights to show that the software has taken control of the modem through the COM port.

•Your communication software settings may not match the physical port the modem is connected to. The serial cable might be plugged into the wrong connector—check your computer documen- tation 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.

•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 swapping modems. If the problem goes away, call Technical Support.

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.

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.

Multi-Tech Systems, Inc. MT5600BA-V92 User Guide

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Contents MultiModem Revision Date Description Table of Contents Features Product Description FeaturesProduct Description Safety Warnings About AT CommandsTechnical Specifications Modem CompatibilityOperating Temperature Installation Two-Wire or Four-Wire Leased Line ConnectionConnect the Modem to Your System Connect the Modem to Your PCInstall the Modem Driver Connect the Modem to the AC Power OutletPower-On Test Installing the Modem DriverSetting Your Country or Region Code Using the LCD Panel Country or Region CodesUsing the Global Wizard Using AT CommandsInstall PhoneTools Modem Configuration Using the Front PanelLED Indicators Liquid Crystal Display LCD Option SelectionStatus Trunk Basic Options Trunk Basic Options Trunk Advanced Options Trunk Advanced Options Trunk Remote Configuration Options Trunk Diagnostic Options TrunkPhone Number Memory Options Trunk Caller ID Options TrunkSetting Country/Region Codes Trunk Caller ID Region SelectFunctionality of Menu Options StatusBasic Options Online OptionsCommand Mode Options Advanced Options RS232 OptionsCallback Security Diagnostic Options Remote Configuration OptionsPhone Number Memory Options Caller ID Options Region Select OptionsTwo-Wire / Four-Wire Setup Leased Line OperationFour-Wire Setup Dial BackupDial Backup and Leased Line Restore Setup Basic Procedure Remote ConfigurationSetup Changing the Remote Configuration Password Changing the Remote Escape Character Callback Security Setup ProceduresTurning Callback Security On and Off Assigning Callback Passwords Front Panel MethodAssigning Callback Phone Numbers Calling Procedure Callback Security Commands Default DescriptionTroubleshooting None of the Indicators LightModem Does Not Respond to Commands Modem Cannot Connect When DialingModem Cannot Connect When Answering Modem Disconnects While OnlineFile Transfer Is Slower Than It Should Be Data Is Being LostThere Are Garbage Characters on the Monitor Modem Doesn’t Work with Caller IDAppendix a Regulatory Compliance FCC Part 68 TelecomCanadian Limitations Notice EMC, Safety, and R&TTE Directive ComplianceInternational Modem Restrictions New Zealand Telecom Warning Notice South African NoticeAppendix B Warranty, Service, Technical Support Multi-Tech Warranty StatementRepair Procedures for U.S. and Canadian Customers Repair Procedures for International CustomersRepair Procedures for International Distributors Replacement PartsUpgrade Overview Appendix C- Upgrading FirmwareIntroduction Identify the Modem FirmwareDownload the Upgrade File Extract the Upgrade FilesUpgrade the Modem’s Firmware Clear Your Stored ParametersRestore Your Parameters Appendix D Installing a Modem Under Linux InstallationUsing the Modem to Call the Internet Standard Linux Serial Port DefinitionsCalling the ISP Answering CallsAppendix E Pin Descriptions RS-232 Pin DescriptionsRS-232 Cable Pinouts Leased Line PinoutsWeee Directive Index #DBRegisters
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MT5600BA-V92 specifications

Multi-Tech Systems MT5600BA-V92 is a versatile communication device designed for efficient data transmission over telephone lines. It is highly regarded for its reliability and performance in various applications, including point-of-sale transactions, remote monitoring, and data acquisition. One of the key features of the MT5600BA-V92 is its ability to operate at data rates of up to 56 Kbps. This high-speed modem ensures rapid data transfer, making it suitable for businesses that require quick and efficient communication.

The device supports V.92 technology, which enhances the performance of dial-up connections. V.92 provides features like cheaper call setup times, reduced latency, and improved upload speeds compared to older standards. This makes the MT5600BA-V92 an ideal choice for users who need enhanced data performance without investing in more complex networking infrastructure.

Another significant characteristic of the MT5600BA-V92 is its analog communication capabilities. The modem utilizes standard analog telephone lines for connectivity, allowing easy integration into existing telephony systems. This compatibility ensures that businesses can leverage their current infrastructure without needing substantial upgrades.

The MT5600BA-V92 integrates several features for improved functionality, including error correction and data compression technologies. These features enhance the reliability of data transmission by ensuring that lost or corrupted data packets are retransmitted, while compression reduces the amount of data sent over the line, further optimizing performance.

The modem is designed with user-friendliness in mind; it features a straightforward installation process and an intuitive configuration interface. Furthermore, it is compact and robust, making it suitable for diverse environments ranging from retail outlets to industrial applications.

The MT5600BA-V92 is also known for its durability and long life cycle, which is crucial for businesses that rely on continuous operations. Additionally, its ability to operate effectively in various conditions solidifies its position as a dependable communication solution.

In summary, the Multi-Tech Systems MT5600BA-V92 is an advanced modem that combines high-speed data transmission, analog compatibility, and robust error correction features. Its reliable performance and user-friendly design make it an excellent choice for businesses looking to enhance their communication capabilities while utilizing existing telephone infrastructure.
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