US4922490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone station set
Assignee: AT&T Inc
•
Filing: 1988-08-08
•
Granted: 1990-05-01
•
Expires: 2008-08-08
Abstract
Abstract A communication station capable of transmitting audible speech represented by speech signals received on the line during the on-hook state. A calling party name may be spoken at the station without requiring the call to be answered. The station is also usable, while on-hook, for receiving voice messages, e.g., emergency warnings, transmitted from a central office or customer premises switch.
Inventors
- 👤 James R. Blakley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:57
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0435; H04Q11/0471; H04M; H04M1/00; H04M1/253; H04M1/57; H04M1/575; H04M1/578; H04Q2213/00; H04Q2213/091; H04Q2213/171; H04Q2213/375; H04Q2213/377
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
206 words
An ISDN speakerphone station set connectable to a digital subscriber line comprising first and second B-channels and a D-channel, said station set comprising switch-hook means having on-hook and off-hook states, splitter/combiner means for digitally interfacing said first and second B-channels and said D-channel of said line with a first B-channel path, a second B-channel path, and a D-channel path, respectively, a first coder/decorder for converting between digital voice signals, received from said first B-channel via said splitter/combiner means and said first B-channel path, and analog voice signals, a second coder/decoder for converting between digital voice signals, received from said second B-channel via said splitter/combiner means and said second B-channel path, and analog voice signals, a station set speaker, speaker switch means having a first position for connecting said first coder/decoder with said speaker and having a second position for connecting said second coder/decoder with said speaker, and station set controller means responsive to receipt, during the on-hook state of said switch-hook means, of a message from said D-channel via said splitter/combiner means and said D-channel path for placing said speaker switch means in said second position to couple a voice announcement on said second B-channel via said splitter/combiner means and said second coder/decoder to said speaker.
Claim 2
Dependent Claim
206 words
An ISDN speakerphone station set connectable to a digital subscriber line comprising first and second B-channels and a D-channel, said station set comprising switch-hook means having on-hook and off-hook states, splitter/combiner means for digitally interfacing said first and second B-channels and said D-channel of said line with a first B-channel path, a second B-channel path, and a D-channel path, respectively, a first coder/decorder for converting between digital voice signals, received from said first B-channel via said splitter/combiner means and said first B-channel path, and analog voice signals, a second coder/decoder for converting between digital voice signals, received from said second B-channel via said splitter/combiner means and said second B-channel path, and analog voice signals, a station set speaker, speaker switch means having a first position for connecting said first coder/decoder with said speaker and having a second position for connecting said second coder/decoder with said speaker, and station set controller means responsive to receipt, during the on-hook state of said switch-hook means, of a message from said D-channel via said splitter/combiner means and said D-channel path for placing said speaker switch means in said second position to couple a voice announcement on said second B-channel via said splitter/combiner means and said second coder/decoder to said speaker.
Claim 3
Dependent Claim
36 words
A station set in accordance with claim 1 wherein said station set controller means is responsive to receipt of said message for transmitting an acknowledgment via said D-channel path and said splitter/combiner means to said D-channel.
Claim 4
Dependent Claim
73 words
A station set in accordance with claim 1 wherein said station set controller means is responsive to the on-hook state of said switch-hook means for transmitting answer signaling via said D-channel path and said splitter/combiner means to said D-channel, and, after transmitting said answer signaling, selectively placing said speaker switch means in said first position to couple voice on said first B-channel via said splitter/combiner means and said first coder/decoder to said speaker.
Claim 5
Dependent Claim
87 words
A station set in accordance with claim 3 further comprising voice/data switch means having a first position for connecting said second B-channel path to said second coder/decoder and having a second position for connecting said second B-channel path to a data terminal, wherein said station set controller means is responsive to receipt of said message for placing said voice/data switch means in said first position to couple said voice announcement on said second B-channel via said splitter/combiner means and said second B-channel path to said second coder/decoder.
References Cited (Backward Citations)
US3553386A
Cited
US4054756A
Cited
US4551581A
Cited
US4582956A
Cited
US4582956B1
Cited
US4551581B1
Cited
US4720848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |