Private branch exchange capable of analyzing information received from ISDN
First Claim
1. A private branch exchange comprising:
- detecting means for detecting a call reception from an analog external line;
a digital interface for connecting a digital terminal capable of performing a digital procedure for an ISDN; and
judging means for judging whether the digital terminal connected to said digital interface is capable of performing an analog procedure for an analog line,wherein if said judging means decides that the digital terminal is capable of performing the analog procedure for the analog line when the call reception is detected by said detecting means, said digital interface transmits a set-up message corresponding to the digital procedure for the ISDN to the digital terminal.
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Accused Products
Abstract
A method of deciding whether an extension terminal is called or not is provided. The kind of communication is recognized on the basis of a set-up message received from the ISDN. Whether the extension terminal is called or not is decided on the basis of the result of comparison between the kind of the extension terminal and the kind of the communication recognized. There is also provided a private branch exchange comprising: a detector to detect a reception from an analog external line; a digital interface to connect a terminal corresponding to a procedure for a digital line; and a judging circuit to judge whether the terminal corresponds to a procedure for an analog line or not, wherein when the judging circuit decides that the terminal corresponds to the procedure for the analog line when the reception is detected by the detector, the digital interface transmits the set-up message to the terminal.
71 Citations
37 Claims
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1. A private branch exchange comprising:
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detecting means for detecting a call reception from an analog external line; a digital interface for connecting a digital terminal capable of performing a digital procedure for an ISDN; and judging means for judging whether the digital terminal connected to said digital interface is capable of performing an analog procedure for an analog line, wherein if said judging means decides that the digital terminal is capable of performing the analog procedure for the analog line when the call reception is detected by said detecting means, said digital interface transmits a set-up message corresponding to the digital procedure for the ISDN to the digital terminal. - View Dependent Claims (2, 3, 4, 5)
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6. A private branch exchange comprising:
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an ISDN-S point interface for connecting a G3/G4 facsimile; detecting means for detecting a request for a G3 communication from the G3/G4 facsimile; and calling means for calling an external analog line on the basis of the request for the G3 communication detected by said detecting means.
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7. A private branch exchange comprising:
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detecting means for detecting an incoming call from an external analog line; an extension digital interface for connecting a digital terminal which is capable of performing a digital procedure for a digital line; and judging means for judging whether the digital terminal connected to said extension digital interface is capable of performing an analog procedure for an analog line, wherein said extension digital interface transmits incoming call information to the digital terminal corresponding to the digital procedure for the digital line on the basis of a judgment by said judging means. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An incoming call process method for a communication system, comprising the steps of:
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detecting an incoming call; discriminating whether a terminal, which is connected to a digital interface, is capable of performing an analog procedure for an analog line; and informing the extension of the incoming call using a digital procedure for a digital line, when the terminal is capable of performing the analog procedure. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. An outgoing call process method for a communication system, comprising the steps of:
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receiving a communication request from a terminal according to a digital procedure for a digital line; discriminating whether the communication request is for a G3 facsimile communication; and making an outgoing call via an external analog line when the communication request is for the G3 facsimile communication. - View Dependent Claims (27, 28, 29)
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30. A private exchange apparatus comprising:
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an analog external line interface for connecting an analog external line; a digital extension interface for connecting a digital terminal which is capable of performing a digital procedure for a digital line and capable of performing an analog procedure for an analog line; and control means for controlling said digital extension interface so as to send a calling signal to the digital terminal using the digital procedure when a call is received via the analog external line. - View Dependent Claims (31, 32, 33)
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34. An incoming call processing method for a private exchange connecting an analog external line and a digital terminal, said method comprising the steps of:
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detecting an incoming call from the analog external line; and sending a calling signal from a digital extension interface to the digital terminal which is capable of performing a digital procedure for a digital line and capable of performing an analog procedure for an analog line. - View Dependent Claims (35, 36, 37)
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Specification