US3729592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telecommunication system
Assignee: US Philips Corp
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Filing: 1971-01-08
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Granted: 1973-04-24
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Expires: 1991-01-08
Abstract
Abstract Telecommunication system comprising a transit exchange and a local exchange connected thereto through a group of junction lines, in which at the reception of an incoming call from the transit exchange which is intended for a subscriber line connected to the local exchange, a connecting channel is established in the local exchange between the called subscriber line and an arbitrary free junction line of said group and the identification of this junction line is transferred to the transit exchange, in which subsequently a connecting channel is established from the line from which the said call originated to said junction line.
Inventors
- 👤 R Buchner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:33
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
262 words
A telecommunication system, comprising a centrally controlled local exchange, a centrally controlled transit exchange, a group of junction lines connecting the local exchange to the transit exchange, subsCriber lines connected to the local exchange, trunk lines connected to the transit exchange, the local exchange comprising switching arrangement means connected to the subscriber lines and the junction lines for interconnecting a selected subscriber line with a selected junction line, a central control device in the local exchange for directing the switching device to interconnect selected subscriber lines to the transit exchange through selected junction lines, a second switching arrangement means in the transit exchange for connecting selected trunk lines to selected junction lines, a second central control device in the transit exchange for influencing the second switching arrangement to make the connections between the selected trunk and junction lines, means connected to the trunk lines for receiving a call identifying a subscriber line, means for transmitting the identification of the subscriber line to the first central control device, the first central control device further comprising means responsive to the receipt of subscriber line identification for establishing a connection through the first switching arrangement between the identified subscriber line and an arbitrary junction line, means in the local exchange for transmitting the identification of the selected junction line to the second central control device of the transit exchange, and means in the second central control device for establishing a connection through the second switching arrangement between the identified junction line and the trunk line on which the call identifying the subscriber line was received.
Claim 2
Dependent Claim
262 words
A telecommunication system, comprising a centrally controlled local exchange, a centrally controlled transit exchange, a group of junction lines connecting the local exchange to the transit exchange, subsCriber lines connected to the local exchange, trunk lines connected to the transit exchange, the local exchange comprising switching arrangement means connected to the subscriber lines and the junction lines for interconnecting a selected subscriber line with a selected junction line, a central control device in the local exchange for directing the switching device to interconnect selected subscriber lines to the transit exchange through selected junction lines, a second switching arrangement means in the transit exchange for connecting selected trunk lines to selected junction lines, a second central control device in the transit exchange for influencing the second switching arrangement to make the connections between the selected trunk and junction lines, means connected to the trunk lines for receiving a call identifying a subscriber line, means for transmitting the identification of the subscriber line to the first central control device, the first central control device further comprising means responsive to the receipt of subscriber line identification for establishing a connection through the first switching arrangement between the identified subscriber line and an arbitrary junction line, means in the local exchange for transmitting the identification of the selected junction line to the second central control device of the transit exchange, and means in the second central control device for establishing a connection through the second switching arrangement between the identified junction line and the trunk line on which the call identifying the subscriber line was received.
References Cited (Backward Citations)
US3496301A
Cited
US3573386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |