MaxTech V.34/V.42bis user manual Modem does not dial, Modem dials but does not connect

Page 18

receive data from the modem.

2.Make sure that your modem is initialized correctly. Your modem may have been initialized to not display re- sponses. 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.

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 mo- dem from operating properly. Refer to Section 2.3 for modem connection 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 sounds noisy, you may have difficulty connecting to the remote device.

Modem makes a connection but no data appears on your screen.

1.Make sure the correct data format (data bits, stop bits, and parity bits) and flow control (RTS/CTS) are being used.

2.Make sure the correct terminal emulation mode is being used (see communication software manual).

High pitch tone is heard whenever you answer the phone.

1.Make sure Auto-Answer is turned off. Your modem is factory configured to NOT auto-answer. Issue AT&F to factory reset your modem.

Modem experiences errors while communicating with a remote modem.

1.Make sure the remote system and your modem use the same communication parameters (speed, parity, etc.).

2.Make sure RTS/CTS hardware flow control is enabled and XON/XOFF software flow control is disabled in the

16

Image 18
Contents MAN080 Rev SF-1128HV/R16-PnP Contents Section One Introduction Section Two InstallationInstall Windows Unpacking Your ModemHardware Installation Expansion SlotsBack Plate Hardware Configuration Plug and Play Configuring in WindowsReplace the computer cover and plug in your com- puter Configuring in a Plug and Play System without Windows Configuring in a Non-Plug and Play SystemSoftware Installation and Configuration Testing Your Modem After Installation Using Your ModemWhere To Go From Here Command Structure Section Three AT Command SetExecuting Commands Basic AT CommandsLow speaker volume Commands are not echoedCommands are echoed Enable Autoscan modeExtended AT Commands Disable auto-retrain Force DSR Signal High onPower on or reset CTS operates per flow controlMNP/V.42/V.42bis Commands Fax Class 1 Commands Fax Class 2 CommandsVoice Commands Section Four S RegistersRegister Function Range/units Default S RegistersSection Six Troubleshooting Modem does not respond to commandsSection Five Result Codes Modem makes a connection but no data appears on your screen Modem does not dialModem dials but does not connect High pitch tone is heard whenever you answer the phoneSection Seven Support and Service Appendix a SpecificationsModem exhibits poor voice record or playback Appendix B Speaker Type Selection Appendix C NoticesFCC Compliance FCC Class B Statement DOC Compliance InformationUL Notice