Communication apparatus
AssigneeCanon Kabushiki Kaisha
InventorsSusumu Matsuzaki, Teruyuki Nishii, Takahiro Kato
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Abstract
A communication apparatus for performing auto-redial processing for repetitively calling a distant station using a prestored call number until a connection can be attained, includes a response state detection unit for detecting a response state of the distant station or an exchanger through a line after a calling operation is started, and a control unit for judging according to a detection state of the response state detection unit whether or not the call number is correct, and for, when it is judged that the call number is false, interrupting the auto-redial processing.
Claims24
A communication apparatus for performing auto-dial process for repetitively calling a distant station using a selected call number until a connection can be attained, comprising:
- dialing means for dialing in accordance with the selected call number;
- detecting means for detecting a response state of the distant station or an exchanger through a line after a calling operation by said dialing means;
- judging means for judging whether the selected call number is correct or false, in accordance with a detection state of said detecting means;
- counting means for counting a number of times that said judging means judges that the selected call number is false;
- and
- control means for inhibiting the auto-dial process of the selected call number in accordance with a count value of said counting means.
A method for performing auto-dial processing for repetitively calling a distant station using a selected call number until a connection can be obtained, comprising the steps of:
- dialing in accordance with the selected call number;
- detecting whether the selected call number is correct or false;
- counting a number of detection times that the selected call number is false;
- and
- inhibiting the auto-dial process of the selected call number in accordance with a count value produced by said counting step.
An auto-dialing method comprising the steps of:
- dialing according to a selected call number;
- detecting a response state of a distant station corresponding to the selected call number or exchanger through a line after a calling operation;
- judging whether the selected call number is correct or false in accordance with a detection result by said detecting step;
- counting a number of times when the selected call number is judged false;
- auto-dialing the selected call number in accordance with a detection result by said detecting step;
- and
- inhibiting the auto-dial process in accordance with a count value produced by said counting step.
A data communication apparatus for performing an auto-dial process for repetitively calling a distant station using a selected call number, comprising:
- dialing means for dialing in accordance with the selected call number;
- first detecting means for detecting a busy tone signal indicating that the distant station is busy;
- second detecting means for detecting a signal relating to data communication;
- and
- control means for judging whether either the busy tone signal or the signal relating to data communication is detected within a predetermined time after dialing, for inhibiting the auto-dial process of the selected call number in accordance with the judgement, and for causing said dialing means to perform a redialing process in accordance with a detection of the busy tone signal,
- wherein said control means judges that the selected call number is false when neither the busy tone signal nor the signal relating to data communication is detected in the predetermined time, and inhibits the auto-dial process of the selected call number when the call number is judged false.
A data communication method for performing an auto-dial process for repetitively calling a distant station using a selected call number, comprising the steps of:
- dialing in accordance with the selected call number;
- detecting a busy tone signal indicating that the distant station is busy;
- detecting a signal relating to data communication;
- and
- judging whether either the busy tone signal or the signal relating to data communication is detected within a predetermined time after dialing, for inhibiting the auto-dial process of the selected call number in accordance with the judgement, and for causing said dialing step to perform a redialing process in accordance with a detection of the busy tone signal,
- wherein said judging step judges that the selected call number is false when neither the busy tone signal nor the signal relating to data communication is detected in the predetermined time, and inhibits the auto-dial process of the selected call number when the call number is judged false.
Dependencies are inferred from the claim text.