| 摘要 |
PROBLEM TO BE SOLVED: To provide a telephone terminal equipment provided with a function capable of an operation without the discrimination of the conversation of data communication and a normal conversation by automatically switching communication through a normal telephone line and a communication center depending on an opposite party to have the conversation with. SOLUTION: After a telephone terminal A1a originates a call to the communication center 2, the call is tentatively originated from the communication center 2 to the telephone terminal B1b, the presence of a conversation request is informed and then, the telephone line 3 is cut off. The telephone terminal B1b calls back the communication center 2, the calling sound of the telephone terminal B1b is rung for the first time and the communication is made possible by an operator picking up a receiver. The telephone terminals A1a and B1b sample and quantize inputted voice information, convert it to packet information and perform the data communication and analog voice signals are restored and reproduced in the telephone terminals A1a and B1b again. Thus, this telephone terminal equipment provided with the function capable of the operation without the discrimination of the conversation of the data communication and the normal conversation is obtained. |
