The 3770Link SO program allows you to run completely automated, unattended communications sessions. (SO is an abbreviation for Script Only.)
In order to to specify which script file to run with 3770Link SO, create a shortcut to 3770so and add the -s filename switch to the "Target" field in the "Shortcut to 3770so.exe Properties" window, where filename is the name of your script file. Doing this will automatically run the selected script file the next time the shortcut is executed. You may customize one of the sample script files or create your own using Notepad or any text editor. 3770Link's script language is documented in the help file.