ZyXEL Communications U-336R/RE Dialing and Answering Techniques, Dialing using the ATD Command

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<Enter>

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
	Tone and Pulse Dialing:	ATDP 555 1212 WT 24
	Dialing Through a PBX:	ATDT 9 W 555 1212
ONOTE:	THE 'W' IN THE DIAL STRING WILL CAUSE THE MODEM TO WAIT FOR A SECOND
	DIAL TONE BEFORE IT CONTINUES TO DIAL.

Basic Modem Operation 17