Note: the editor should not detach itself from the parent process! So, if you use such an editor (like CygnusEd), you should put the right parameter in the command line to prevent it from detaching itself. For example, if you use CygnusEd, you should use a command line such as:
Ced %s -keepio
Or if you use GoldEd:
Ed %s STICKY
To be able to use these feature, you should set both STFax and the external program to open the serial device in shared mode.
STFax expects the hang up to be done by the external program.
You can use these symbols in the command line:
%d Serial device to use %u Device unit %b Baud rate of the serial port %f Flags of the serial port %c Connection baud rate