HiRO H50158 V92 56K - Manual (Page 20)

20
Troubleshooting
This appendix contains information that will help you to solve some of the common problems you might encounter, while
using this 56Kbps PCI modem. For further assistance, contact your dealer.
Modem does not respond to AT commands
 There may be a COM port/IRQ conflict. Reconfigure the modem COM port address and IRQ line.
 Make sure that you have set the correct COM port and IRQ in the communications software.
 Make sure the system is in Terminal mode of your communications software.
Modem cannot dial and “NO DIALTONE” message appears on the monitor
 Check the phone cord connection. Make sure that the jack on the modem labeled Line is connected to an analog
phone wall jack.
 The modem cannot recognize the dial tone. This is typical in some corporate PBXs. Use the ATX1 command in your
setup string to enable Blind Dial.

The modem does not answer an incoming call
 Auto-answer function is disabled. Enable the function through software program or by sending the ATS0=1
command to your modem in terminal mode.

The modem disconnects while online
 This may be caused by line interference. Retry the connection by dialing the numbers several times.
 An incoming call may have broken the connection if the
Call-waiting feature is enabled. Disable Call-waiting and
try again.
Garbage characters display on the monitor
 Set your modem to the same word length, parity, and stop bits as the remote modem.
 Make sure that your software and modem are set to the same flow control setting.
 The software may not be set for correct terminal emulation.
Configure the software to correct type. ANSI terminal emulation is the most commonly used.
 Type the AT&F command to load the factory default settings