Communication apparatus for selecting a communication protocol compatible to a partner station and executing the selected protocol
AssigneeCanon Kabushiki Kaisha
InventorTakehiro Yoshida
Life of this patent
Estimating the term…
Abstract
A communication apparatus includes a first detection circuit which detects a call signal, and a second detection circuit detects information of a partner station sent between call signals. A memory circuit stores information of a communication system of the partner station in association with the information of the partner station. A reading circuit reads the information of the communication system for the detected information of the partner station from the memory circuit in accordance with the information of the partner station detected by the second detection circuit at the time of the detection of the call signal and executes the communication protocol in accordance with the read information of the communication system.
Claims7
A communication apparatus adapted to execute a plurality of kinds of facsimile protocols, said apparatus comprising:
- a call signal detector circuit adapted to detect a call signal from a communication line;
- an ID detector circuit adapted to detect ID information for identifying a calling station from the communication line before a start of communication with the calling station, when said call signal detector circuit has detected the call signal from the communication line;
- a memory adapted to store ID information for identifying a calling station and facsimile protocol information for indicating a facsimile protocol used for communication with that calling station, in correspondence with each other;
- a determination circuit adapted to determine whether a predetermined time period has elapsed after the storage of facsimile protocol information corresponding to the ID information detected by said ID detector circuit, into said memory;
- and
- a control circuit adapted to perform communication based on the facsimile protocol information stored in the memory in correspondence with the ID information detected by said ID detector circuit, or communication for deciding a facsimile protocol for the calling station, in accordance with the result of determination by said determination circuit, so as to discriminate the facsimile protocol of the calling station, and to perform communication based on the facsimile protocol according to a result of the discrimination and to restore the facsimile protocol information according to that result of the discrimination, in correspondence with the ID information detected by said ID detector circuit.
A communication method of a communication apparatus adapted to execute a plurality of kinds of facsimile protocols and having a memory that stores ID information for identifying a calling station and facsimile protocol information for indicting a facsimile protocol used for communication with the calling station, in correspondence with each other, said method comprising:
- a call signal detection step, of detecting a call signal from a communication line;
- an ID detection step, of detecting ID information for identifying a calling station from the communication line before a start of communication with the calling station, when the call signal has been detected in said call signal detection step;
- a determination step for determining whether a predetermined time period has elapsed after the storage of facsimile protocol information corresponding to the ID information detected in said ID detection step, into a memory;
- and
- a control step for performing communication based on the facsimile protocol information stored in the memory in correspondence with the ID information detected in said ID detection step, or communication for deciding a facsimile protocol for the calling station, in accordance with the result of a determination made in said determination step, so as to discriminate the facsimile protocol of the calling station, and for performing communication based on the facsimile protocol according to a result of the discrimination and restoring the facsimile protocol information according to that result of the discrimination, in correspondence with the ID information detected in said ID detection step.
Dependencies are inferred from the claim text.