COURIER HIGH SPEED MODEMS
Software Commands⎯ATD, ATA
If your voice/data switch is set for a function other than voice/data operations and you don't wish to change it, use AT commands.
1.Call the other user to establish the bit rate, parity, word length and number of Stop bits the other person's modem accepts. Determine which modem will originate and which will answer.
2.If you are to originate the connection, type the following command:
ATD <Enter>
NOTE: Be sure the modem is not set to X2, X4, X6 or X7, or it will return the NO DIAL TONE result code and hang up.
3.The other party must then have the remote modem go off hook in Answer mode. The following command is used to do this:
ATA <Enter>
4.If the remote modem also has handset exclusion, leave both phones off hook in case you wish to switch back again to voice after your data transfer. If the remote modem doesn't have handset exclusion, switching back to voice may not be successful. If you don't want to switch back to voice later, hang up both phones as soon as the modems go off hook.
