Problem No response appears after executing a com- mand

Problem: You type an AT command line and press En- ter, but your modem fails to execute the command line.

Solution: Be sure you type AT at the beginning of the command line.

Make sure the communications software is configured for the same serial port as your mo- dem.

Be sure your modem is in terminal mode and not in data mode when you type the command.

Problem: No response appears after executing a com- mand.

Solution: If you typed a command but did not receive an OK response from your modem:

Make sure the communications software and modem are configured for the same serial port.

The E0 and Q1 commands may be in effect, disabling echo and responses. Verify this with the &V command. To enable echo and re- sponses, type AT E1 Q0 and press Enter.

Be sure your modem is in terminal mode and not in data mode when you type the command.

Problem: You receive an ERROR response when trying to execute a command.

Solution: Check whether you typed the command cor- rectly.

Check whether the command is a valid one.

Be sure your command line contains fewer than 40 characters.

Problem: Your modem goes off-hook and seizes the telephone line when there is an incoming voice call that you want to take on your telephone.

Solution: The modem is configured for auto-answer. Turn off auto-answer in your software.

18	Quick Start and Reference Guide