Patent ID: 8908841

Claim:
A communication apparatus capable of performing first facsimile communication using a real-time Internet mode in which image data is transferred through IP packets and second facsimile communication using a VoIP-based virtual voice mode, comprising: a storage unit configured to store at least one piece of destination information each representing whether a corresponding one of at least one pre-registered communication destination is capable of performing the first facsimile communication; a voice communication unit configured to perform VoIP-based voice communication with a communication destination by establishing a call connection; and a transmission unit configured, in a case where the voice communication is switched to facsimile communication while the call connection is being established, to perform the first facsimile communication to transmit image data, if it is determined based on the at least one piece of the destination information stored in said storage unit that a destination of the voice communication is capable of performing the first facsimile communication.