MaxTech 800 Section Six Troubleshooting, Modem does not respond to commands, Modem does not dial

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Section Six - Troubleshooting

This section describes some of the common problems you may encounter while using your modem. If you can not resolve your difficulty after reading this chapter, contact your dealer or vendor for assistance.

Modem does not respond to commands.

1.Make sure the modem is not configured with a conflicting COM port and IRQ setting (see Section 2.4). Your modem can not be configured as COM1 (default) if another device in your system is also configured as COM1. Similarly, IRQ settings may not overlap.

2.Make sure the communication software is configured to “talk” to the modem on the correct COM port and IRQ setting (same COM port and IRQ setting as the modem). Your communication software must know which address your modem is using in the system in order to pass data to it. Similarly, IRQ settings must be set correctly to receive data from the modem.

3.Make sure that your modem is initialized correctly. Your modem may have been initialized to not display responses. You may factory-reset the modem by issuing AT&F and press ENTER. The factory default allows the modem to display responses after a command has been executed.

4.Make sure the baud rate setting in your software is set to 115200, 57600, 38400, 19200, 14400, 9600, 2400, 1200, or 300 bps. An incorrect baud rate prevents the modem from operating properly.

Modem does not dial.

1.Make sure the modem is connected to a working phone line. Replace the modem with a working phone to ensure that the phone line is working.

2.Make sure the phone line is connected to the jack marked “LINE.” Incorrect connection prevents the modem from operating properly. Refer to Section 2.2 for modem connec- tion instructions.

Modem dials but does not connect.

1.Make sure the IRQ setting is identical on both the modem AND the software. Modem and software must be configured identically.

2.Make sure the phone line is working properly. Replace the modem with a regular phone and dial the number. If the line

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Contents MAN018 Rev Section Two Installation Hardware InstallationSection One Introduction Unpacking Your ModemCommon Serial Ports Male connector Software Installation/ConfigurationCOM Port and Interrupt Settings SW1 Settings Devices in your computer cannot share an IRQ withUsing the Fax Capabilities of the Modem Testing Your Modem After InstallationUsing Your Modem Where To Go From HereExecuting Commands Command StructureBasic AT Commands Bold text Command FunctionCommands are echoed Low speaker volumeTouch-tone dialing DS=nExtended AT Commands Guard tone disabled Modem is set up for dial-up line operationDisable originate-only mode US setting for off-hook-to-on-hook ratioMNP/V.42/V.42bis Commands Section Four S Registers S Registers Function Range/units Default Section Five Result CodesExtended Response Codes Connect 19200/V42BIS Section Six Troubleshooting Modem does not respond to commandsModem does not dial Modem dials but does not connect42bis/V.42/MNP2-5 does not work Modem makes a connection but no data appears on your screenHigh pitch tone is heard whenever you answer the phone Section Nine FCC , DOC & Other Notices Section Eight Support and ServiceFCC Compliance FCC Class B Statement DOC Compliance InformationDisclaimer, Copyright, And Other Notices
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