ZyXEL Communications U-336SA - Manual (Page 29)

Basic Modem Operation 15
You are now ready to start entering AT commands.
In the terminal window, type:
AT
Your modem responds
OK
This confirms that the modem and your computer are communicating
correctly.
To test the telephone line connection issue the manual answer
command.
Type:
ATA
Your modem will pick up the phone line, and try to communicate.
Normally, this command is only used to answer an incoming call made
from another modem, thus the high pitched tone you will hear from the
speaker. To abort the operation, press any key, or select “Disconnect”
from the “Call” menu.
Dialing and Answering Techniques
Depending on what communications software you use to make modem
connections, you may not have as much control of how the modem dials
the telephone number. This section shows some useful examples of the
AT commands used for dialing and answering operations. The
command characters specific to each function are shown in bold type.
Dialing using the ATD Command
Touch Tone Dialing: ATDT 555 1212
Pulse Dialing: ATDP 555 1212