Patent US5402483A successfully refreshed from Google Patents.
US5402483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital telephone system with terminals connected to a digital exchange unit providing all functions of the terminals
Assignee: Intel Germany Holding GmbH
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Filing: 1991-08-23
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Granted: 1995-03-28
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Expires: 2011-08-23
Abstract
Abstract A telephone apparatus includes a digital exchange unit and at least one digital telephone terminal connected to the digital exchange unit. The at least one digital telephone terminal generates monitoring signals and has multiple functions. All of the monitoring signals generated in the at least one digital telephone terminal are forwarded directly to the digital exchange unit. All of the functions of the at least one digital telephone terminal are controlled directly by the digital exchange unit through corresponding control signals.
Inventors
- 👤 Gunter Weinberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:44
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0421; H04M; H04M1/00; H04M1/247; H04M1/253; H04M3/00; H04M3/42; H04M3/42314; H04Q11/0428; H04Q11/0435; H04Q11/0471; H04Q2213/00; H04Q2213/096; H04Q2213/215; H04Q2213/334
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
98 words
A telephone apparatus, comprising a digital exchange unit, at least one digital telephone terminal connected to said digital exchange unit, said at least one digital telephone terminal generating monitoring signals and having multiple functions, means for forwarding all of the monitoring signals generated in said at least one digital telephone terminal directly to said digital exchange unit, and means for controlling all of the functions of said at least one digital telephone terminal directly by said digital exchange unit through corresponding control signals transmitted from said digital exchange unit directly to said at least one digital telephone terminal.
Claim 2
Dependent Claim
98 words
A telephone apparatus, comprising a digital exchange unit, at least one digital telephone terminal connected to said digital exchange unit, said at least one digital telephone terminal generating monitoring signals and having multiple functions, means for forwarding all of the monitoring signals generated in said at least one digital telephone terminal directly to said digital exchange unit, and means for controlling all of the functions of said at least one digital telephone terminal directly by said digital exchange unit through corresponding control signals transmitted from said digital exchange unit directly to said at least one digital telephone terminal.
Claim 3
Dependent Claim
18 words
The telephone apparatus according to claim 1, including means for correcting transmission errors in monitoring and control signals.
Claim 4
Dependent Claim
17 words
The telephone apparatus according to claim 1, including means for coding and decoding monitoring and control signals.
Claim 5
Dependent Claim
17 words
The telephone apparatus according to claim 2, including means for coding and decoding monitoring and control signals.
References Cited (Backward Citations)
EP0173264A2
Cited
US4817147A
Cited
US4741026A
Cited
DE3721984A1
Cited
US4907255A
Cited
US4961185A
Cited
EP0350836A2
Cited
US4897866A
Cited
EP0365200A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-27 | 1998-09-26 | 1999-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-27 | 2002-09-26 | 2003-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-27 | 2006-09-26 | 2007-03-28 | $7700.00 | Window Closed / Lapsed |