Patent US5537220A successfully refreshed from Google Patents.
US5537220A
Expired / Lapsed
US
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Facsimile apparatus capable of connecting to mobile communicator and public communication line
Assignee: Canon Inc
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Filing: 1994-04-26
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Granted: 1996-07-16
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Expires: 2014-04-26
Abstract
Abstract In portable facsimile apparatus capable of being connected to a telephone line or mobile communication unit, the setting in a modem may be changed in accordance with the connected line. More specifically, the setting in a modem 1-8 is changed, depending on whether the modem is connected to a telephone line 1-10 or a mobile communication unit 1-11. Also, a circuit for discriminating which line is connected to a NCU 1-9 is provided so that the modem 1-8 can change an output signal level in accordance with result of the discrimination.
Inventors
- 👤 Yosuke Ezumi
- 👤 Takeshi Tsukamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:53
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00885; H04N1/00888; H04N1/00896; H04N1/00127; H04N1/00281; H04N1/00901; H04N1/00904; H04N1/32; H04N1/327; H04N1/32797; H04N1/333; H04N1/33307; H04N2201/00; H04N2201/0008; H04N2201/0034; H04N2201/0096
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
115 words
A facsimile apparatus capable of utilizing a plurality of types of communication lines by switching over an operation mode of regulation means for regulating a signal gain in a modem in accordance with a connected communication line comprising: discrimination means for discriminating the type of the connected communication line; control means for controlling said regulation means in accordance with the discrimination result by said discrimination means, wherein said regulation means includes an equalizer which has a first mode for automatically regulating a signal gain, and a second mode for holding the signal gain, and said control means includes select means for selecting the first mode or the second mode in accordance with the discrimination result.
Claim 2
Dependent Claim
115 words
A facsimile apparatus capable of utilizing a plurality of types of communication lines by switching over an operation mode of regulation means for regulating a signal gain in a modem in accordance with a connected communication line comprising: discrimination means for discriminating the type of the connected communication line; control means for controlling said regulation means in accordance with the discrimination result by said discrimination means, wherein said regulation means includes an equalizer which has a first mode for automatically regulating a signal gain, and a second mode for holding the signal gain, and said control means includes select means for selecting the first mode or the second mode in accordance with the discrimination result.
Claim 3
Dependent Claim
23 words
The apparatus according to claim 1, wherein the plurality of types of communication lines includes a mobile communication line and public telephone line.
Claim 4
Dependent Claim
24 words
The apparatus according to claim 1, wherein said regulation means changes a transmitted signal level from the modem in accordance with the discrimination result.
Claim 5
Dependent Claim
20 words
The apparatus according to claim 3, wherein said regulation means changes the minimum sensitivity of the modem to receive signals.
Claim 6
Dependent Claim
22 words
The apparatus according to claim 1, wherein the plurality of types of communication lines include a line connected to an acoustic coupler.
Claim 7
Dependent Claim
21 words
The apparatus according to claim 1, wherein said control means controls said regulation means, based on an instruction from an operator.
Claim 8
Dependent Claim
38 words
The apparatus according to claim 1, wherein in a case where said select means selects the second mode, said control means regulates the equalizer, based on a modem training signal, and starts an image communication after the regulation.
Claim 9
Dependent Claim
29 words
The apparatus according to claim 7, wherein said control means regulates the equalizer, based on another modem training signal after receiving a CTC signal conforming to an CCITT recommendation.
Claim 10
Dependent Claim
31 words
The apparatus according to claim 7, wherein said control means regulates the equalizer, based on still another modem training signal immediately before receiving a TCF signal conforming to a CCITT recommendation.
Claim 11
Dependent Claim
16 words
The apparatus according to claim 1, wherein said control means controls the gain of the modem.
Claim 12
Dependent Claim
114 words
A communication control method adopted to a facsimile apparatus capable of utilizing a plurality of types of communication lines by switching over an operation mode of a regulator for regulating a signal gain in a modem in accordance with a connected communication line comprising the steps of: discriminating the type of the connected communication line; and controlling the regulator in accordance with the discrimination result in said discriminating step, wherein the regulator includes an equalizer which has a first mode for automatically regulating a signal gain, and a second mode for holding the signal gain, and said controlling step includes selecting the first mode or the second mode in accordance with the discrimination result.
Claim 13
Dependent Claim
114 words
A communication control method adopted to a facsimile apparatus capable of utilizing a plurality of types of communication lines by switching over an operation mode of a regulator for regulating a signal gain in a modem in accordance with a connected communication line comprising the steps of: discriminating the type of the connected communication line; and controlling the regulator in accordance with the discrimination result in said discriminating step, wherein the regulator includes an equalizer which has a first mode for automatically regulating a signal gain, and a second mode for holding the signal gain, and said controlling step includes selecting the first mode or the second mode in accordance with the discrimination result.
Claim 14
Dependent Claim
20 words
The method according to claim 11, wherein said controlling step controls the regulator, based on an instruction from an operator.
Claim 15
Dependent Claim
36 words
The method according to claim 11, wherein in a case where the second mode is selected, said controlling step regulates the equalizer, based on a modem training signal, and starts an image communication after the regulation.
Claim 16
Dependent Claim
29 words
The method according to claim 13, wherein said controlling step regulates the equalizer, based on another modem training signal after receiving a CTC signal conforming to a CCITT recommendation.
Claim 17
Dependent Claim
32 words
The method according to claim 13, wherein said controlling step regulates the equalizer, based on still another modem training signal immediately before receiving signal a TCF signal conforming to a CCITT recommendation.
Claim 18
Dependent Claim
23 words
The method according to claim 11, wherein the plurality of types of communication lines include a mobile communication line and public telephone line.
Claim 19
Dependent Claim
23 words
The method according to claim 11, wherein the regulator changes a transmitted signal level from the modem in accordance with the discrimination result.
Claim 20
Dependent Claim
19 words
The method according to claim 17, wherein the regulator changes the minimum sensitivity of the modem to receive signals.
Claim 21
Dependent Claim
22 words
The method according to claim 11, wherein the plurality of types of communication lines include a line connected to an acoustic coupler.
Claim 22
Dependent Claim
18 words
The method according to claim 11, wherein the gain of the modem is controlled in said controlling 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) | 1999-07-16 | 2000-01-15 | 2000-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-16 | 2004-01-15 | 2004-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-16 | 2008-01-15 | 2008-07-16 | $7700.00 | Window Closed / Lapsed |