Locating a Problem
Chapter Eight - Troubleshooting
126
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).
3. 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.
4. 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.
5. 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.
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 r
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 the 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).
3. High pitch tone is heard whenever you answer the phone
4. Make sure Auto-Answer is turned off. Your modem is factory configured to
NOT auto-answer. Issue AT&F to factory reset your modem.
Summary of Contents for TransPort NX
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