US3721769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Call metering for pabx telephone system
Assignee: AG Communication Systems Corp
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Filing: 1971-07-22
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Granted: 1973-03-20
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Expires: 1991-07-22
Abstract
Abstract Metering of local calls made from stations of a private automatic branch telephone system, is provided for use in hotels, motels, etc. The attendant can secure up-dated information as to calls from each station, on a common readout display.
Inventors
- 👤 E Krock
- 👤 C Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:12
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545; H04M; H04M15/00; H04M15/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
189 words
A communication system comprising: a private branch exchange connected to an associated telephone central office by at least one trunk; said private branch exchange including a plurality of telephone stations each having a different identifying code number, a central processor having an associated memory, scanning means, register means, and a switching network selectively operable under control of said central processor to complete a circuit connection through said network from one of said telephone stations to said trunk; said memory including first storage means operated in response to an answer signal from said central office to record said answer signal and to record the identity of said one telephone station; said memory further including second storage means for storing the quantity of central office calls made by each of said stations; said central processor operated to control said scanning means to detect the registration of said answer signal and the identity of said one station, and said central processor further operated in response to said detection to increment by a count of one, said second storage means storing the quantity of central office calls associated with said identified one station.
Claim 2
Dependent Claim
189 words
A communication system comprising: a private branch exchange connected to an associated telephone central office by at least one trunk; said private branch exchange including a plurality of telephone stations each having a different identifying code number, a central processor having an associated memory, scanning means, register means, and a switching network selectively operable under control of said central processor to complete a circuit connection through said network from one of said telephone stations to said trunk; said memory including first storage means operated in response to an answer signal from said central office to record said answer signal and to record the identity of said one telephone station; said memory further including second storage means for storing the quantity of central office calls made by each of said stations; said central processor operated to control said scanning means to detect the registration of said answer signal and the identity of said one station, and said central processor further operated in response to said detection to increment by a count of one, said second storage means storing the quantity of central office calls associated with said identified one station.
Claim 3
Dependent Claim
116 words
A communication system as claimed in claim 1 wherein said private branch exchange further includes: metering means for determining the quantity of central office calls originated by a selected one of said telephone stations, including a calling device, display means, register means and starting means operated to request service; said central processor in response to said request, operated to connect said register means to said calling device; said calling device operated to transmit the identifying code number of said selected station to said register; said central processor operated in response to said code number stored in said register, to operate said display means to indicate the quantity of central office calls made by said selected station.
Claim 4
Dependent Claim
25 words
A communication system as claimed in claim 2 wherein: said metering means further includes release means operated to render said previously operated display means inoperative.
Claim 5
Dependent Claim
17 words
A communication system as claimed in claim 3 wherein: said release means comprises a manually operated key.
Claim 6
Dependent Claim
83 words
A communication system as claimed in claim 2 wherein: said metering means further includes reset means; said reset means operated to render said previously operated display means inoperative and transmit the identity of said selected station to said central processor; said central processor operated in response to said display means rendered inoperative and said transmitted identity of said selected station, to erase said quantity of central office calls originated by said selected telephone station, from said second storage means included in said memory.
Claim 7
Dependent Claim
17 words
A communication system as claimed in claim 5 wherein: said reset means comprises a manually operated key.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |