Data transmission over a communication line
AssigneeCanon Kabushiki Kaisha
InventorTakehiro Yoshida
Life of this patent
Estimating the term…
Abstract
A data communication apparatus includes a data communication section, a calling section for calling a desired destination, a manual instruction section for issuing a manual instruction for starting data communication after calling by the calling section, and a section for transmitting a recognition signal indicating that a calling station is a non-voice terminal after calling by the calling section. In a manual communication mode for performing data communication according to the manual instruction, the recognition signal is sent in response to the manual instruction.
Claims13
A data transmission apparatus located at one end of a communication line for performing data transmission through the communication line, said apparatus comprising:
- manual instruction means for issuing a manual instruction for starting data transmission in an off-hook state of the communication line;
- means for transmitting to the communication line a standard tone signal indicating that said apparatus is operating as a non-voice terminal, in response to the manual instruction issued by said manual instruction means;
- and
- means, responsive to an initial recognition signal indicative of a data communication function received from the communication line after transmission of the standard tone signal, for performing data transmission in accordance with an automatic procedure.
A data transmission apparatus located at one end of a communication line for performing data transmission through the communication line, said apparatus comprising:
- a telephone set for speech communication;
- data transmission means for performing data transmission through the communication line in accordance with a predetermined communication procedure;
- means for selectively connecting one of said telephone set and said data transmission means to the communication line;
- manual instruction means for issuing a manual instruction for starting data transmission in a condition where said telephone set is connected to the communication line;
- means for sending a standard tone signal indicating that said apparatus is operating as a non-voice terminal;
- and
- control means for controlling said connecting means so as to connect said data transmission means to the communication line and for causing said sending means to send the standard tone signal to the communication line in response to the manual instruction, said control means further being responsive to receipt of an initial recognition signal indicative of a data communication function received from the communication line after the standard tone signal has been sent for causing said data transmission means to automatically perform the data transmission.
A method for data transmission through a communication line, comprising the steps taken at one end of the communication line of:
- issuing a manual instruction for starting data transmission in an off-hook state of the communication line;
- sending to the communication line a standard tone signal indicating a non-voice terminal operating at the one end of the communication line in response to the manual instruction;
- and
- responsive to receipt of an initial recognition signal indicative of a data communication function received from the communication line after the standard tone signal has been sent, performing data transmission in accordance with an automatic procedure.
Dependencies are inferred from the claim text.