User guide

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Chapter 5 - AT Commands
Dialing
To dial a number using AT commands, you must first start a data communications program. In the program’s
terminal mode, type ATDxxxxxxx<cr>, where xxxxxxx is the telephone number you want to dial, and <cr> is
the carriage return character that is sent when you press ENTER , e.g, ATD7853500<cr>. The dial string can
contain up to 80 characters.
To make it easier to read the dial string, you can use hyphens, spaces or parentheses. These characters are
ignored by the TA. For example, the TA would read the following dial strings the same way:
ATD17637853500 <cr>
ATD 1-763-785-3500 <cr>
ATD 1 [phone] <cr>
Canceling a Call
To cancel a call before the TA makes a connection, press any key.
Storing a Telephone Number
To store a telephone number, type &Zn=x in terminal mode, where n is the number of the memory register in which
the number is to be stored, and x is the dial command string that you want to store. For example, type AT&Z9=763-
785-3500 <cr> to store the number 763-785-3500 in memory register 9.
Dialing a Stored Telephone Number
To dial a stored telephone number, type DS=n in terminal mode, where n is the location of the number you want
to dial. For example, type ATDS=3 <cr> dials a telephone stored in memory register 3 location.
Displaying a Stored Number
To display a stored telephone number, type &Zn? in terminal mode, where n is the memory register where the
number is stored. For example, type AT&Z5? <cr> to display the telephone number in memory register 5. To
list all ten telephone numbers stored in memory, type ATL <cr>.
Answering a Call
You can answer incoming calls to the TA either manually or automatically. When the TA detects an incoming
call, it turns on the RI signal on the V.24 interface and sends a RING result code to the computer or terminal
after each ring. If you enable autoanswer, the TA automatically answers the call. To manually answer the call,
use the A command.
Answering Manually
If your communication program is in terminal mode when the RING result code appears on your monitor,
manually answer the call by typing ATA <cr>.
Answering Automatically
To set the TA to answer a call automatically :
1. Enable autoanswer by setting register S0 to the ring on which you want the TA to answer (e.g., in
terminal mode, type S0=4 to make the TA answer on the fourth ring). You also can use one of the
configuration utilities to the turn autoanswer on and set the number of rings.
2. Make sure that the TA is offline.