US5481605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Private branch exchange capable of analyzing information received from ISDN
Assignee: Canon Inc
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Filing: 1993-07-02
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Granted: 1996-01-02
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Expires: 2013-07-02
Abstract
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.
Inventors
- 👤 Shigeki Sakurai
- 👤 Shoichi Takashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:29
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q3/00; H04Q3/58; H04Q3/62; H04Q3/625; H04Q3/627
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
109 words
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.
Claim 2
Dependent Claim
109 words
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.
Claim 3
Dependent Claim
39 words
An exchange according to claim 1, wherein when said judging means determines that the terminal does not correspond to the analog procedure for the analog line, said digital interface does not transmit the set-up message to the digital terminal.
Claim 4
Dependent Claim
19 words
An exchange according to claim 1, wherein the analog procedure for the analog line includes a G3 facsimile procedure.
Claim 5
Dependent Claim
18 words
An exchange According to claim 1, wherein the digital interface transmits the set-up message to a G3/G4 facsimile.
Claim 6
Dependent Claim
40 words
An exchange according to claim 1, wherein said judging means comprises memory means for storing the type of digital terminal and judges whether or not the digital terminal corresponds to the analog procedure on the basis of said memory means.
Claim 7
Dependent Claim
52 words
A private branch exchange comprising: 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.
Claim 8
Dependent Claim
52 words
A private branch exchange comprising: 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.
Claim 9
Dependent Claim
96 words
A private branch exchange comprising: 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.
Claim 10
Dependent Claim
96 words
A private branch exchange comprising: 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.
Claim 11
Dependent Claim
42 words
An exchange according to claim 7, wherein, when said judging means determines that the digital terminal does not correspond to the analog procedure for the analog line, said extension digital interface does not transmit the incoming call information to the digital terminal.
Claim 12
Dependent Claim
31 words
An exchange according to claim 7, wherein the digital procedure for the digital line includes an ISDN procedure and the analog procedure for the analog line includes a G3 facsimile procedure.
Claim 13
Dependent Claim
20 words
An exchange according to claim 7, wherein said extension digital interface transmits the incoming call information to a G3/G4 facsimile.
Claim 14
Dependent Claim
48 words
An exchange according to claim 7, wherein said extension digital interface transmits the incoming call information to the digital terminal on the basis of the judgment by said Judging means in a case where the incoming call from an external analog line is detected by said detecting means.
Claim 15
Dependent Claim
41 words
An exchange according to claim 7, wherein said extension digital interface transmits the incoming call information to the digital terminal in a case where said judging means judges that the digital terminal corresponds to a communication corresponding to the analog procedure.
Claim 16
Dependent Claim
36 words
An exchange according to claim 12, wherein said extension digital interface transmits the incoming call information to the digital terminal in a case where said judging means judges the digital terminal corresponds to an audio communication.
Claim 17
Dependent Claim
36 words
An exchange according to claim 12, wherein said extension digital interface transmits the incoming call information to the digital terminal in a case where said judging means judges the digital terminal corresponds to a G3 communication.
Claim 18
Dependent Claim
39 words
An exchange according to claim 7, wherein said judging means comprises memory means for storing the type of the digital terminal and judges whether the digital terminal corresponds to the analog procedure on the basis of said memory means.
Claim 19
Dependent Claim
16 words
An exchange according to claim 7, wherein the digital line is an integrated service digital network.
Claim 20
Dependent Claim
30 words
An exchange according to claim 7, wherein said extension digital interface connects a G4 facsimile, and said judging means judges whether the G4 facsimile has a G3 facsimile communication function.
Claim 21
Dependent Claim
65 words
An incoming call process method for a communication system, comprising the steps of: 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.
Claim 22
Dependent Claim
65 words
An incoming call process method for a communication system, comprising the steps of: 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.
Claim 23
Dependent Claim
20 words
A method according to claim 18, wherein the incoming call from an analog line is detected in said detecting step.
Claim 24
Dependent Claim
20 words
A method according to claim 18, wherein the incoming call from a digital line is detected in said detecting step.
Claim 25
Dependent Claim
20 words
A method according to claim 18, wherein the incoming call having a predetermined attribute is detected in said detecting step.
Claim 26
Dependent Claim
20 words
A method according to claim 18, wherein the analog procedure discriminated in said discriminating step is a G3 facsimile procedure.
Claim 27
Dependent Claim
21 words
A method according to claim 18, wherein it is discriminated in said discriminating step whether the terminal is a G3/G4 facsimile.
Claim 28
Dependent Claim
20 words
A method according to claim 18, wherein an ISDN interface is used for informing the terminal in said informing step.
Claim 29
Dependent Claim
19 words
A method according to claim 18, wherein said discriminating step is performed to each of a plurality of terminals.
Claim 30
Dependent Claim
60 words
An outgoing call process method for a communication system, comprising the steps of: 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.
Claim 31
Dependent Claim
60 words
An outgoing call process method for a communication system, comprising the steps of: 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.
Claim 32
Dependent Claim
20 words
A method according to claim 26, wherein the communication request from a G3/G4 facsimile is received in said receiving step.
Claim 33
Dependent Claim
20 words
A method according to claim 26, wherein the communication request is received via an ISDN interface in said receiving step.
Claim 34
Dependent Claim
23 words
A method according to claim 26, wherein the external analog line is selected from the external analog line and an external digital line.
Claim 35
Dependent Claim
82 words
A private exchange apparatus comprising: 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.
Claim 36
Dependent Claim
82 words
A private exchange apparatus comprising: 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.
Claim 37
Dependent Claim
31 words
An apparatus according to claim 30, wherein said control means includes means for judging whether the digital terminal connected to said digital extension interface is capable of performing the analog procedure.
Claim 38
Dependent Claim
24 words
An apparatus according to claim 30, wherein the digital procedure includes a G4 facsimile procedure and the analog procedure includes a G3 facsimile procedure.
Claim 39
Dependent Claim
14 words
An apparatus according to claim 30, wherein the calling signal includes a SETUP message.
Claim 40
Dependent Claim
70 words
An incoming call processing method for a private exchange connecting an analog external line and a digital terminal, said method comprising the steps of: 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.
Claim 41
Dependent Claim
70 words
An incoming call processing method for a private exchange connecting an analog external line and a digital terminal, said method comprising the steps of: 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.
Claim 42
Dependent Claim
30 words
A method according to claim 34, wherein whether the digital terminal connected to the digital extension interface is capable of performing the analog procedure is judged in said sending step.
Claim 43
Dependent Claim
41 words
A method according to claim 34, wherein the calling signal is sent to the digital terminal which is capable of performing the digital procedure including a G4 facsimile procedure and capable of performing the analog procedure including a G3 facsimile procedure.
Claim 44
Dependent Claim
20 words
A method according to claim 34, wherein the calling signal including a SETUP message is sent in said sending step.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-01 | 1999-07-03 | 2000-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-01 | 2003-07-03 | 2004-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-01 | 2007-07-03 | 2008-01-02 | $7700.00 | Window Closed / Lapsed |