Patent ID: 7139088
Filing Date: 2006-11-21
Classification: H04N

Abstract:
1. A communication apparatus including an analogue terminal communication unit for effecting communication through an analogue circuit with an analogue communication terminal and a data communication network connecting unit for effecting connection to a data communication network, further comprising: a requesting unit adapted to request call establishment to the data communication network via a first communication system, when a sending request is received from the analogue communication terminal through the analogue circuit; a receiving unit adapted to receive a notice indicating that call establishment is possible from the data communication network corresponding to the call establishment request; and a communication executing unit adapted to execute the communication with the data communication network via a second communication system by switching the first communication system to the second communication system different from said first communication system and adapted to continue the communication with the analogue communication terminal without disconnecting the communication of the analogue circuit, when the notice is not received by said receiving unit.