Answering a Call

Chapter 4 - AT Commands, S-Registers, and Result Codes

Note: In Windows 2000 and Windows 98/95, if the Use Country Code and Area Code box is checked in the Properties window for dial-up connection, the bundling modifier (i.e., &, + or !) is removed from the dialing string when the user attempts to make a connection. The solution is to not check the Use Country Code and Area Code box or to simply add the bundling dial modifier to the phone number at the time of connection.

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 DSn in terminal mode, where n is the location of the number you wish to dial. For example, type ATDS3 <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 in which 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>.

You can answer incoming calls to the TA either manually or automatically. When the TA detects an incoming call, it sends a RING result code to the computer or terminal after each ring. If autoanswer is enabled, the TA automatically answers the call. You can manually answer the call with the A command. Both methods are described below.

Answering Manually

If your communication program is in terminal mode when the RING result code appears on your monitor, you can manually answer the call by typing ATA <cr>.

Answering Automatically

To cause the TA to automatically answer a call:

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 either of the configuration utilities to the turn on autoanswer and set the number of rings.

2.Make sure that the TA is offline.

The TA answers the call after the number of rings specified by S0. To disable autoanswer, use a configuration utility or the command S0=0.

Note: If the user wants to accept calls while DTR is low, the TA must be configured to ignore DTR. To do this, enter AT&D0<cr>. With this configuration, the TA can accept calls while DTR is low. If this configuration setting is not made, the TA rejects incoming calls until DTR is high while calls comes in.