Communication apparatus capable of performing facsimile communication, and control method and storage medium therefor

摘要

A communication apparatus capable of executing facsimile transmission in any of real-time Internet mode and VoIP-based virtual voice mode and capable of switching voice communication to facsimile communication of the real-time Internet mode which is higher in communication speed than the virtual voice mode. In a case where voice communication is switched to facsimile communication, the facsimile transmission is executed in T.38 mode, if it is determined based on destination information stored in a storage unit of the communication apparatus that a communication destination with which the voice communication is being performed is capable of performing facsimile communication in T.38 mode.