Patent US5081539A successfully refreshed from Google Patents.
US5081539A
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Facsimile apparatus and facsimile communication method
Assignee: Canon Inc
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Filing: 1990-06-11
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Granted: 1992-01-14
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Expires: 2010-06-11
Abstract
Abstract In a facsimile apparatus bus-connected to an ISDN line, a D channel signal on a bus is monitored to supervise whether or not a reception interruption message from another facsimile apparatus is received. When a reception interruption message from another facsimile apparatus is detected, a communication restart procedure is executed for a destination apparatus of the reception interruption message, and interrupted facsimile communication data is substitute-received. Urgent document information or the like can be quickly transmitted to a destination without inadvertently interrupting facsimile communication. In this control, no large-capacity memory is required in each apparatus for substitute reception, and a simple and inexpensive facsimile apparatus can be provided.
Inventors
- 👤 Yohji Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:00
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/327; H04N1/32797; H04N1/32609; H04N1/32614; H04N1/32619
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
125 words
A facsimile apparatus connected to an Integrated Services Digital Network line with other communication terminals, said Integrated Services Digital Network line having a D channel for control information and a B channel for data, comprising: monitor means for monitoring a D channel signal on the Integrated Services Digital Network line; supervisor means for supervising whether or not said monitor means receives a reception interruption request from one of the other communication terminals connected to the D channel; and substitute-reception means for transmitting a signal for restarting data transmission which has been interrupted by the reception interruption request and receiving data substituting for the one of the other communication terminals, when said supervisor means detects the reception interruption request from one of the other communication terminals.
Claim 2
Dependent Claim
125 words
A facsimile apparatus connected to an Integrated Services Digital Network line with other communication terminals, said Integrated Services Digital Network line having a D channel for control information and a B channel for data, comprising: monitor means for monitoring a D channel signal on the Integrated Services Digital Network line; supervisor means for supervising whether or not said monitor means receives a reception interruption request from one of the other communication terminals connected to the D channel; and substitute-reception means for transmitting a signal for restarting data transmission which has been interrupted by the reception interruption request and receiving data substituting for the one of the other communication terminals, when said supervisor means detects the reception interruption request from one of the other communication terminals.
Claim 3
Dependent Claim
43 words
The facsimile apparatus according to claim 1, wherein when said supervisor means receives a communication request through the Integrated Services Digital Network line, said supervisor means receives facsimile communication data through the Integrated Services Digital Network line and prints out the received data.
Claim 4
Dependent Claim
34 words
The facsimile apparatus according to claim 2, further comprising interruption transmission means for transmitting the reception interruption request on the D channel, when said facsimile apparatus can no longer receive data during data reception.
Claim 5
Dependent Claim
58 words
The facsimile apparatus according to claim 1, further comprising transmission interruption means for, interrupting transmission processing, when the facsimile apparatus receives the reception interruption request through said Integrated Services Digital Network line, and communication restart means for restarting interrupted transmission, when the signal for restarting interrupted transmission is received during interruption of transmission by said transmission interruption means.
Claim 6
Dependent Claim
118 words
A facsimile communication method for a communication system in which at least two facsimile apparatuses are connected to an Integrated Services Digital Network line which has a D channel for control information and a B channel for data, comprising the steps of: when one of said two facsimile apparatuses receives facsimile communication data, another facsimile apparatus monitors the D channel signal on the Integrated Services Digital Network line, and when said one of the facsimile apparatuses transmits a reception interruption request in the D channel, said another facsimile apparatus transmits a signal for restarting data transmission which has been interrupted by the reception interruption request in the D channel and receives data substituting for said one facsimile apparatus.
Claim 7
Dependent Claim
118 words
A facsimile communication method for a communication system in which at least two facsimile apparatuses are connected to an Integrated Services Digital Network line which has a D channel for control information and a B channel for data, comprising the steps of: when one of said two facsimile apparatuses receives facsimile communication data, another facsimile apparatus monitors the D channel signal on the Integrated Services Digital Network line, and when said one of the facsimile apparatuses transmits a reception interruption request in the D channel, said another facsimile apparatus transmits a signal for restarting data transmission which has been interrupted by the reception interruption request in the D channel and receives data substituting for said one facsimile apparatus.
Claim 8
Dependent Claim
34 words
A facsimile communication method according to claim 5, wherein said another facsimile apparatus receives data in accordance with a communication request, when the communication request is received during the monitoring of the D channel.
Claim 9
Dependent Claim
35 words
A facsimile communication method according to claim 6, wherein said another facsimile apparatus transmits the reception interruption message in the D channel when said one facsimile apparatus can no longer receive data during data reception.
Claim 10
Dependent Claim
75 words
The method according to claim 5, further comprising the steps of, when an own facsimile apparatus receives the reception interruption message from another ISDN-connected apparatus during facsimile communication with said another ISDN-connected apparatus, interrupting transmission processing, and the step of, when an interruption restart message is received from another facsimile apparatus during interruption of transmission, restarting interrupted facsimile communication, and transmitting remaining facsimile communication data to the facsimile apparatus which issued the interruption restart message.
Claim 11
Dependent Claim
129 words
A data communication apparatus connected to an Integrated Services Digital Network line with other communication terminals, said Integrated Services Digital Network line has a D channel for control information and a B channel for data, comprising: monitor means for monitoring a D channel signal on the Integrated Services Digital Network line during data reception by one of the other communication terminals, and control means for detecting whether or not a reception interruption message is transmitted to the D channel by the other communication terminal, and transmitting a restart signal in accordance with a detection of the reception interruption message, wherein the restart signal restarts the data communication interrupted by one of the other communication terminals, said control means receives data substituting for the one of the other communication terminals.
Claim 12
Dependent Claim
129 words
A data communication apparatus connected to an Integrated Services Digital Network line with other communication terminals, said Integrated Services Digital Network line has a D channel for control information and a B channel for data, comprising: monitor means for monitoring a D channel signal on the Integrated Services Digital Network line during data reception by one of the other communication terminals, and control means for detecting whether or not a reception interruption message is transmitted to the D channel by the other communication terminal, and transmitting a restart signal in accordance with a detection of the reception interruption message, wherein the restart signal restarts the data communication interrupted by one of the other communication terminals, said control means receives data substituting for the one of the other communication terminals.
Claim 13
Dependent Claim
37 words
A data communication apparatus according to claim 9, wherein said control means detects whether or not a communication request is received through the D channel, and receives data in accordance with a detection of the communication request.
References Cited (Backward Citations)
US4589033A
Cited
US4717967A
Cited
US4785355A
Cited
US4789900A
Cited
US4907094A
Cited
US4930017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-13 | 1995-07-15 | 1996-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-13 | 1999-07-15 | 2000-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-13 | 2003-07-15 | 2004-01-14 | $7700.00 | Window Closed / Lapsed |