Patent ID: 7701931

Claim:
A network communication apparatus that includes a function for performing communications via an IP network and that includes an ITU-T standard T.38 communication function but does not include a voice communication function, the network communication apparatus comprising: a unit configured to generate a setup call connection signal including a T.38 communication capability and a dummy voice capability to start a call connection operation; a unit configured to send the setup call connection signal to a gateway network communication apparatus located between the network communication apparatus and a destination communication apparatus; and a unit configured to receive a call connection signal from the gateway network communication apparatus, to determine whether or not the gateway network communication apparatus includes the T.38 communication function and the dummy voice capability based on the received call connection signal, to send a dummy CNG packet to the gateway network communication apparatus when it is determined that the gateway network communication apparatus has the dummy voice capability but does not have the T.38 communication function, and to perform T.38 communication operation after sending the dummy CNG packet.