Auto Print - if checked, STFax will automatically print the incoming faxes. STFax will use the default printer as selected within your printer preferences.
In the first mode, STFax will spawn the external program set in the external programs requester when a data call is detected and the mini-bbs is not active.
Instead, in the ONLY FAX mode, STFax will send out the text saved in the file STFax:Data/NoData.txt when a data call is detected and then it will hang up. If the file doesn't exists, it will only hang up.
In VOICE/FAX mode, STFax will also handle incoming voice calls.
In VOICE ONLY mode STFax will work only as a speakerphone: if Auto Answer is on, STFax will answer automatically to incoming calls and you'll be able to talk via your headset.
In DATA ONLY mode, if the Mini-BBS is enabled, STFax will answer in data mode, initialising the Mini-BBS as soon as a data connection is established with the remote modem.
NOTE: "Debug" level is the highest and if you have trouble with STFax, you should send me the log produced with this level along with your bug report.