Communication sequence, data circuit-terminating equipment, data terminal equipment, and storage medium storing communication control program
AssigneeToshiba Tec Kabushiki Kaisha
InventorMuneaki Ikeda
Life of this patent
Estimating the term…
Abstract
A DCE sends a first command to a DTE if data transmission from the DCE has not ended at a predetermined timing after the end of data transfer from the DTE to the DCE. The DTE sends a second command to the DCE at an arbitrary timing upon reception of the first command. Upon reception of the second command, the DCE sends to the DTE the first command if data transmission has not ended, or a third command if data transmission has ended. The DTE and DCE execute a post-data transmission procedure after they exchange the third command.
Claims9
A communication sequence which performs transmission of data from a data terminal equipment to a circuit via a data circuit-terminating equipment by asynchronously executing transmission of the data from the data terminal equipment to the data circuit-terminating equipment and transmission of the data from the data circuit-terminating equipment to the circuit,
- wherein the data circuit-terminating equipment sends a first command to the data terminal equipment if transmission of the data from the data circuit-terminating equipment has not ended at a predetermined timing after end of transfer of the data from the data terminal equipment to the data circuit-terminating equipment,
- the data terminal equipment sends a second command to the data circuit-terminating equipment at an arbitrary timing upon reception of the first command,
- upon reception of the second command, the data circuit-terminating equipment sends the first command if transmission of the data has not ended, and a third command if transmission of the data has ended, and
- the data terminal equipment and the data circuit-terminating equipment execute a post-data transmission procedure after the third command is exchanged.
A data circuit-terminating equipment comprising:
- a reception section which receives data sent from a data terminal equipment in a first sequence;
- a transmission section which transmits the data received in the reception section to a circuit in a second sequence asynchronous to the first sequence;
- an unended transmission notification section which sends a first command to the data terminal equipment if transmission of the data to the circuit in the transmission section has not ended at a predetermined timing after end of reception of the data in the reception section;
- a response section which sends, to the data terminal equipment upon reception of a second command from the data terminal equipment, the first command if transmission of the data to the circuit has not ended, and a third command if transmission of the data to the circuit has ended;
- and
- a terminating processing section which executes a post-data transmission procedure between the data circuit-terminating equipment and the data terminal equipment after the third command is sent.
A data terminal equipment which transmits data to a circuit via a data circuit-terminating equipment which asynchronously performs reception of data and transmission of the data to the circuit, and comprises
- an inquiry section which sends a second command of the data circuit-terminating equipment at an arbitrary timing after the data circuit-terminating equipment sends a first command after end of transfer of the data to the data circuit-terminating equipment, and
- a terminating processing section which executes a post-data transmission procedure after the data circuit-terminating equipment sends a third command in accordance with the second command sent from the inquiry section.
A storage medium which stores a communication control program which causes a computer having a function of transmitting data to be transmitted to a circuit to a data circuit-terminating equipment which asynchronously performs reception of data and transmission of the data to the circuit, to perform control concerning transmission of the data,
- wherein the communication control program includes a program which operates the computer as an inquiry section which sends a second command to the data circuit-terminating equipment at an arbitrary timing after the data circuit-terminating equipment sends a first command after end of transfer of the data to the data circuit-terminating equipment, and a terminating processing section which executes a post-data transmission procedure after the data circuit-terminating equipment sends a third command in accordance with the second command sent from the inquiry section.
Dependencies are inferred from the claim text.