Zaptel faxdetect option

HI

; For fax detection, uncomment one of the following lines. The default is OFF
;
;faxdetect=both
;faxdetect=incoming
;faxdetect=outgoing
;faxdetect=no

I have a pretty clear idea about the option incoming. but I didn’t find something that help me to understand how it’s work with the outgoing option.

somebody have some more information.

Thanks
Matteo