Patent ID: 6831897
Filing Date: 2004-12-14
Classification: H04N

Abstract:
A data communication apparatus comprising:a communication section that performs a pre-communication protocol with a destination terminal, and transmits data to the destination terminal after the pre-communication protocol, the pre-communication protocol comprising at least one of a communication protocol for selecting a modulation mode, a communication protocol for line probing, a communication protocol for modem training and a communication protocol for setting a modem parameter; a memory that stores destination terminal data regarding at least one destination terminal, and communication parameters corresponding to each destination terminal, the communication parameters being utilized to perform a communication to the destination terminal; and a controller that, when destination terminal data is stored in said memory, reads the communication parameters corresponding to the destination terminal from said memory, and performs the pre-communication protocol with the destination terminal, using the read communication parameters, and omits at least the communication protocol for line probing, while when destination terminal data is not stored in said memory, performs the pre-communication protocol with the destination terminal, using communication parameters acquired from the destination terminal under the pre-communication protocol without omitting the communication protocol for line probing.