초록 ▼

This invention eliminates a time needed for communication handshaking by executing pre-communication protocol based on a prestored communication parameter. Specifically, at the time of carrying out a normal protocol, a modulation mode, a communication protocol, a modem parameter and a modem's optima

This invention eliminates a time needed for communication handshaking by executing pre-communication protocol based on a prestored communication parameter. Specifically, at the time of carrying out a normal protocol, a modulation mode, a communication protocol, a modem parameter and a modem's optimal training time, etc., which are set by four communication channels, e.g., a communication channel for selecting a modulation mode, a communication channel for implementing line probing, a communication channel for modem training, and a communication channel for setting a modem parameter, are stored for each destination communication apparatus, and subsequent communication is implemented based on the stored information.

대표청구항 ▼

1. A data communication apparatus comprising:a communication section that performs a pre-communication protocol to exchange a communication function with a destination terminal, and transmits data to the destination terminal after the pre-communication protocol; a memory that stores data regarding a

1. A data communication apparatus comprising:a communication section that performs a pre-communication protocol to exchange a communication function with a destination terminal, and transmits data to the destination terminal after the pre-communication protocol; a memory that stores data regarding at least one destination terminal, and communication parameters corresponding to each destination terminal, the communication parameters being necessary to perform a communication to the destination terminal; and a controller that, when destination terminal data is stored in said memory, reads out 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, 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 utilizing the communication parameters stored in the memory, wherein, when one of a rate and an amount of communication errors in a communication with a destination terminal stored in said memory becomes at least equal to a predetermined value, said controller exchanges a communication function with the destination terminal under a normal protocol to acquire new communication parameters and automatically updates the communication parameters of the destination terminal stored in said memory with newly acquired communication parameters.