US3655922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching arrangement for telephone exchange-installation
Assignee: Siemens AG
•
Filing: 1968-10-18
•
Granted: 1972-04-11
•
Expires: 1988-10-18
Abstract
Abstract A telephone exchange installation wherein information is transmitted between a central control mechanism and individual apparatus over a two-stage transmission network including buffer storage means interposed between the two stages. Information is transmitted in parallel code between the buffer storage means and the individual apparatus which utilizes relatively inexpensive and relatively slow-working switching elements. Information is transmitted in series code between the buffer storage means and the central control mechanism which utilizes electronic, relatively fast-working switching elements. Optimum utilization of the telephone exchange equipment is thereby achieved by adjusting for the differing speed of operation of the switching elements in the central control and the individual apparatus and the resulting variance in the speed of information transmission.
Inventors
- 👤 Peter Gerke
- 👤 Karl Rutkowski
- 👤 Helmuth Joachim Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:27
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
190 words
A switching arrangement for telephone exchange installations including central control apparatus constituted by central control means, data storage means and program storage means and individual apparatus consisting of switching systems such as switching matrices having line finding and setting systems, subscriber connection circuits, identification means, external and internal connection sets, dial signal receivers, registers, and the like comprising: first and second types of transmission lines, said first type being multiconductor lines arranged for parallel data transmission, said second type being constructed to accommodate serial data transmission, intermediate storage means, said first type of transmission lines connecting said indivIdual apparatus to said intermediate storage means, said second type of transmission lines connecting said central control apparatus to said intermediate storage means, first type of relatively slowly operating transmission and receiving means connecting said individual apparatus and said intermediate storage means, respectively, to said first type of transmission lines for parallel data transmission and reception therebetween, and second type of relatively faster operating transmission and receiving means connecting said intermediate storage means and said central control apparatus, respectively, to said second type of transmission line for serial data transmission and reception therebetween.
Claim 2
Dependent Claim
190 words
A switching arrangement for telephone exchange installations including central control apparatus constituted by central control means, data storage means and program storage means and individual apparatus consisting of switching systems such as switching matrices having line finding and setting systems, subscriber connection circuits, identification means, external and internal connection sets, dial signal receivers, registers, and the like comprising: first and second types of transmission lines, said first type being multiconductor lines arranged for parallel data transmission, said second type being constructed to accommodate serial data transmission, intermediate storage means, said first type of transmission lines connecting said indivIdual apparatus to said intermediate storage means, said second type of transmission lines connecting said central control apparatus to said intermediate storage means, first type of relatively slowly operating transmission and receiving means connecting said individual apparatus and said intermediate storage means, respectively, to said first type of transmission lines for parallel data transmission and reception therebetween, and second type of relatively faster operating transmission and receiving means connecting said intermediate storage means and said central control apparatus, respectively, to said second type of transmission line for serial data transmission and reception therebetween.
Claim 3
Dependent Claim
28 words
The switching arrangement recited in claim 1 wherein individual information transmissions over the second transmission lines are each preceded by length data information indicating the quantitative extent thereof.
Claim 4
Dependent Claim
22 words
The switching arrangement recited in claim 1 wherein individual information transmissions comprise a plurality of equal size groups of binary code elements.
Claim 5
Dependent Claim
20 words
The switching arrangement recited in claim 2 wherein the length data information comprises an individual group of binary code elements.
Claim 6
Dependent Claim
20 words
The switching arrangement recited in claim 3 wherein the length data information comprises an individual group of binary code elements.
Claim 7
Dependent Claim
27 words
The switching arrangement recited in claim 5 wherein the number of groups of binary code elements forming individual information transmissions is determined from the length data information.
Claim 8
Dependent Claim
22 words
The switching arrangement recited in claim 3 wherein the plurality of groups of binary code elements are transmitted in series coded form.
Claim 9
Dependent Claim
17 words
The switching arrangement recited in claim 7 wherein the code elements comprising each group are transmitted simultaneously.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |