US4748662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus having a dial calling function
Assignee: Toshiba Corp
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Filing: 1985-12-23
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Granted: 1988-05-31
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Expires: 2005-12-23
Abstract
Abstract An apparatus having dial calling device which effects a call to an apparatus of a destination office by sending out a selection signal based on a telephone number to office lines. After a calling operation request is issued from the dial calling device, the calling operation is inhibited at least during an off period of a call signal.
Inventors
- 👤 Yoshihiro Hirata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:47
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/32037; H04N1/32064; H04M; H04M1/00; H04M1/26; H04M1/27; H04M1/274; H04M1/2745; H04N1/00912; Y; Y10; Y10S; Y10S379/00; Y10S379/908
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
An apparatus having a dial calling function comprising: dial request generating means for generating dial requests; dial means for sending out a selection signal to an office line in response to a dial request for calling a selected destination party, said selection signal corresponding to a telephone number of an apparatus of the selected destination party; timer means for counting time, said timer means starting its operation in response to a dial request generated by said dial request generating means; paging detection means for detecting a paging signal transmitted from the office line, said paging signal being repeatedly discontinued for a predetermined discontinue time period at a predetermined frequency; and means for permitting operation of said dial means, after said timer means counts out a predetermined time which is longer than the predetermined discontinue time period of said paging signal, in response to a dial request when a paging signal is not detected by said paging detection means.
Claim 2
Independent Claim
158 words
An apparatus having a dial calling function comprising: dial request generating means for generating dial requests; dial means for sending out a selection signal to an office line in response to a dial request for calling a selected destination party, said selection signal corresponding to a telephone number of an apparatus of the selected destination party; timer means for counting time, said timer means starting its operation in response to a dial request generated by said dial request generating means; paging detection means for detecting a paging signal transmitted from the office line, said paging signal being repeatedly discontinued for a predetermined discontinue time period at a predetermined frequency; and means for permitting operation of said dial means, after said timer means counts out a predetermined time which is longer than the predetermined discontinue time period of said paging signal, in response to a dial request when a paging signal is not detected by said paging detection means.
Claim 3
Dependent Claim
31 words
The apparatus according to claim 1, further comprising an operating unit having keys for causing said dial request generating means to generate dial requests in response to actuation of selected keys.
Claim 4
Dependent Claim
28 words
The apparatus according to claim 1, further comprising means for storing time data wherein said dial request generating means generates the dial requests based on said time data.
Claim 5
Dependent Claim
64 words
The apparatus according to claim 1, further comprising: receiving request generating means for generating a receiving request; receiving means for receiving a signal from apparatus of the destination party under the condition that a receiving request is generated by said receiving request generating means, after said timer means counts out the predetermined time, when a paging signal is detected by said paging detection means.
Claim 6
Dependent Claim
56 words
The apparatus according to claim 1, further comprising: counter means for counting, after said timer means counts out the predetermined time, the number of paging signals detected by said paging detection means; and receiving means for receiving a signal from apparatus of the destination party when the count of said counter means reaches a predetermined number.
Claim 7
Dependent Claim
101 words
The apparatus according to claim 1, further comprising: a telephone handset located at the destination party; receiving request generating means for generating a receiving request; detecting means for detecting if the telephone handset located at the destination party is off-hook; receiving means for receiving a signal for an apparatus of the destination party under the conditions that a receiving request is generated by said receiving request generating means and the off-hook of the handset is detected by said detecting means after said timer means counts out the predetermined time and when a paging signal is detected by said paging detection means.
Claim 8
Independent Claim
168 words
An apparatus having a dial calling function comprising: dial request generating means for generating dial requests; dial means for sending out a selection signal to an office line in response to a dial request for calling a selected destination party, said selection signal corresponding to a telephone number of an apparatus of the selected destination party; timer means for counting time, said timer means starting its operation in response to a dial request generated by said dial request generating means; paging detection means for detecting a paging signal transmitted from the office line, said paging signal being repeatedly discontinued for a predetermined discontinue time period at a predetermined frequency; network control means for controlling the office line; and means for connecting the office line to said network control means in response to a dial request, after said timer means counts out a predetermined time which is longer than the predetermined discontinue period of said paging signal, when the paging signal is not detected by said paging detection means.
Claim 9
Independent Claim
168 words
An apparatus having a dial calling function comprising: dial request generating means for generating dial requests; dial means for sending out a selection signal to an office line in response to a dial request for calling a selected destination party, said selection signal corresponding to a telephone number of an apparatus of the selected destination party; timer means for counting time, said timer means starting its operation in response to a dial request generated by said dial request generating means; paging detection means for detecting a paging signal transmitted from the office line, said paging signal being repeatedly discontinued for a predetermined discontinue time period at a predetermined frequency; network control means for controlling the office line; and means for connecting the office line to said network control means in response to a dial request, after said timer means counts out a predetermined time which is longer than the predetermined discontinue period of said paging signal, when the paging signal is not detected by said paging detection means.
References Cited (Backward Citations)
US4087638A
Cited
US4535198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |