US5898764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data communication apparatus
Assignee: Canon Inc
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Filing: 1996-11-27
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Granted: 1999-04-27
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Expires: 2016-11-27
Abstract
Abstract A data communication apparatus automatically sets a signal send condition in accordance with an actual communication status. If the data communication apparatus accommodates a plurality of lines, a call is made from a first line to a second line and a predetermined signal is sent from the first line to the second line, and based on the received information, a signal send condition contained therein is determined and registered.
Inventors
- 👤 Takehiro Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:41
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/333; H04N1/33307; H04N1/33323; H04N1/33361; H04N2201/00; H04N2201/0077; H04N2201/0093; H04N2201/32; H04N2201/333; H04N2201/33307; H04N2201/33342; H04N2201/33371
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
81 words
A data communication apparatus comprising: communication means for communicating data, said communication means being connected to a plurality of lines including at least one line A and another line B; and control means for causing said communication means to send from the line A a predetermined signal used to check a line state, by calling from the line A to the line B, and based on a signal received via the line B, determining a data sending condition in the communication.
Claim 2
Dependent Claim
81 words
A data communication apparatus comprising: communication means for communicating data, said communication means being connected to a plurality of lines including at least one line A and another line B; and control means for causing said communication means to send from the line A a predetermined signal used to check a line state, by calling from the line A to the line B, and based on a signal received via the line B, determining a data sending condition in the communication.
Claim 3
Dependent Claim
25 words
A data communication apparatus according to claim 1 wherein a send level in the communication is determined as the signal send condition in the communication.
Claim 4
Dependent Claim
29 words
A data communication apparatus according to claim 1 wherein a characteristic of a fixed amplitude equalizer in the communication is determined as the signal send condition in the communication.
Claim 5
Dependent Claim
29 words
A data communication apparatus according to claim 1 wherein the determination and the registration are conducted when a power supply is turned on and off in an unregistered state.
Claim 6
Dependent Claim
30 words
A data communication apparatus according to claim 1 wherein the determination and the registration are conducted when it is determined that a communication rate is lower than a set rate.
Claim 7
Dependent Claim
30 words
A data communication apparatus according to claim 1 wherein the determination and the registration are conducted when it is determined that a communication error is larger than a set level.
Claim 8
Dependent Claim
30 words
A data communication apparatus according to claim 1 wherein the determination and the registration are conducted when a designation command is received from an operation unit or a remote unit.
Claim 9
Dependent Claim
25 words
A data communication apparatus according to claim 1 wherein a switch to select whether or not the determination and the registration are conducted is provided.
Claim 10
Dependent Claim
23 words
A data communication apparatus according to claim 1 wherein when the determination and the registration are conducted, it is displayed or printed out.
Claim 11
Dependent Claim
26 words
A data communication apparatus according to claim 1 wherein when the determination and the registration are conducted, a predetermined destination is dialed to send information thereof.
Claim 12
Dependent Claim
76 words
A communication apparatus comprising: reception means for receiving a check signal for checking a characteristic of a fixed amplitude equalizer of a communication line through the communication line; determination means for determining the characteristic of the fixed amplitude equalizer of the communication line based on the check signal received by said reception means; and control means for setting a correction value to the fixed amplitude equalizer in accordance with the determined result by said determination means.
Claim 13
Dependent Claim
76 words
A communication apparatus comprising: reception means for receiving a check signal for checking a characteristic of a fixed amplitude equalizer of a communication line through the communication line; determination means for determining the characteristic of the fixed amplitude equalizer of the communication line based on the check signal received by said reception means; and control means for setting a correction value to the fixed amplitude equalizer in accordance with the determined result by said determination means.
Claim 14
Dependent Claim
81 words
A communication apparatus comprising: communication means for communicating data; reception means for receiving a check signal for measuring an attenuation amount of a signal level of a communication line through the communication line; determination means for determining the attenuation amount based on the check signal received by said reception means; and control means for setting the attenuation amount of the data signal communicated by said communication means to said communication means in accordance with the determined results by said determination means.
Claim 15
Dependent Claim
81 words
A communication apparatus comprising: communication means for communicating data; reception means for receiving a check signal for measuring an attenuation amount of a signal level of a communication line through the communication line; determination means for determining the attenuation amount based on the check signal received by said reception means; and control means for setting the attenuation amount of the data signal communicated by said communication means to said communication means in accordance with the determined results by said determination means.
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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) | 2002-04-26 | 2002-10-26 | 2003-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-26 | 2006-10-26 | 2007-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-26 | 2010-10-26 | 2011-04-27 | $7700.00 | Window Closed / Lapsed |