Dialing Problems; Data Transfer Problems - ZyXEL Communications U-336S User Manual

Solution
Your modem may be configured for auto-answering. To disable
auto-answer, type ATS0=0 and press Enter with the modem in
command state.

Dialing Problems

Problem
Your modem does not dial calls.
Solutions
• Make sure the supplied telephone cable is connected to your
modem's LINE jack and not the PHONE jack.
• You are using touch-tone dialing on a line that requires pulse
dialing. Change your communications software to use pulse
dialing.

Data Transfer Problems

Problem
You can make a data connection with a remote modem, but
encounter frequent errors during data transfers.
Solutions
1. Your modem and communications software may be configured
for different flow control methods. Be sure your modem and
software are both using hardware (RTS/CTS) flow control or
software (XON/XOFF) flow control.
2. To verify that your modem and communications software are
using the same flow control method, type AT&T8 and press the
Enter key with your modem in the command state. You should
see a smooth "stair-stepping" ASCII test pattern flowing
diagonally across your screen.
138 Diagnostics & Troubleshooting