US3816668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for providing switched range extension
Assignee: AT&T Inc
•
Filing: 1972-11-15
•
Granted: 1974-06-11
•
Expires: 1992-11-15
Abstract
Abstract An arrangement is disclosed in a multistage switching system for providing range extension to lines exceeding a predetermined length. Range extension circuitry is included in some of the interstage links accessible to ''''long lines'''' as well as in looparound lines having dual appearances in the switching system. As a first choice, a network connection is established to a ''''long line'''' via one of the idle interstage links equipped with range extension circuitry. However, if an idle network connection cannot be found via one of these equipped links, as a second choice the connection is established via a loop-around line adapted to provide range extension.
Inventors
- 👤 K Giesken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:07
CPC Classifications
H; H04; H04Q; H04Q3/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
72 words
In combination, a switching network having at least two stages with link paths therebetween, said network selectively controllable to establish communication paths between terminations on said network via said stages and said link paths, a loop-around line having a first termination on one of said stages and a second termination on another of said stages, and range extension means in less than all of said link paths and in said loop-around line.
Claim 2
Dependent Claim
72 words
In combination, a switching network having at least two stages with link paths therebetween, said network selectively controllable to establish communication paths between terminations on said network via said stages and said link paths, a loop-around line having a first termination on one of said stages and a second termination on another of said stages, and range extension means in less than all of said link paths and in said loop-around line.
Claim 3
Dependent Claim
58 words
as a second choice, in the absence of an idle one of said link paths having a said range extension means, to establish a first communication path between said line termination and said first termination of said loop-around line, and to establish a second communication path between said other termination and said second termination of said loop-around line.
Claim 4
Dependent Claim
58 words
as a second choice, in the absence of an idle one of said link paths having a said range extension means, to establish a first communication path between said line termination and said first termination of said loop-around line, and to establish a second communication path between said other termination and said second termination of said loop-around line.
Claim 5
Dependent Claim
15 words
The combination according to claim 1 further comprising control means for controlling said switching stages:
Claim 6
Dependent Claim
21 words
a loop-around line having a first termination on one of said stages and a second termination on another of said stages;
Claim 7
Dependent Claim
21 words
a loop-around line having a first termination on one of said stages and a second termination on another of said stages;
Claim 8
Dependent Claim
9 words
amplification means in each of said accessible link paths;
Claim 9
Dependent Claim
9 words
amplification means in each of said accessible link paths;
Claim 10
Dependent Claim
65 words
as a second choice, in the absence of an idle one of said link paths having a range extension circuit, to establish a first communication path between said line termination of said one certain line and said first termination of one of said loop-around lines, and to establish a second communication path between said other termination and said second termination of said one loop-around line.
Claim 11
Dependent Claim
65 words
as a second choice, in the absence of an idle one of said link paths having a range extension circuit, to establish a first communication path between said line termination of said one certain line and said first termination of one of said loop-around lines, and to establish a second communication path between said other termination and said second termination of said one loop-around line.
Claim 12
Dependent Claim
75 words
amplification means in said loop-around line; and said control means, in the absence of an idle one of said accessible link paths with amplification means, controls said stages to establish a first communication path between said one certain line termination and said first termination of said loop-around line via one of said additional link paths, and to establish a second communication path between said second termination of said loop-around line and said one other termination.
Claim 13
Dependent Claim
75 words
amplification means in said loop-around line; and said control means, in the absence of an idle one of said accessible link paths with amplification means, controls said stages to establish a first communication path between said one certain line termination and said first termination of said loop-around line via one of said additional link paths, and to establish a second communication path between said second termination of said loop-around line and said one other termination.
Claim 14
Dependent Claim
46 words
The combination according to claim 2 further comprising, a line having an impedance exceeding a predetermined limit connected to said line termination, and means in each of said range extension means connected with and responsive to said control means for actuating said each range extension means.
Claim 15
Dependent Claim
42 words
control means for controlling said stages to establish a communication path between one of said certain line terminations and one of said other terminations via an idle one of said accessible link paths; said arrangement CHARACTERIZED IN THAT the arrangement further comprises:
Claim 16
Dependent Claim
42 words
control means for controlling said stages to establish a communication path between one of said certain line terminations and one of said other terminations via an idle one of said accessible link paths; said arrangement CHARACTERIZED IN THAT the arrangement further comprises:
Claim 17
Dependent Claim
129 words
In a communication switching system wherein at least two switching stages having link paths therebetween are selectively controllable to establish communication paths between terminations on said stages via said link paths, some of said terminations are connected to lines, and certain of said lines have an impedance exceeding a predetermined limit, the combination comprising, a plurality of loop-around lines each having a first termination on one of said stages and a second termination on another of said stages, a range extension circuit in each of said loop-around lines and in some of said link paths, and control means for controlling said switching stages, in accordance with information specifying a line termination of one of said certain lines and another termination between which a communication path is to be established,
Claim 18
Dependent Claim
129 words
In a communication switching system wherein at least two switching stages having link paths therebetween are selectively controllable to establish communication paths between terminations on said stages via said link paths, some of said terminations are connected to lines, and certain of said lines have an impedance exceeding a predetermined limit, the combination comprising, a plurality of loop-around lines each having a first termination on one of said stages and a second termination on another of said stages, a range extension circuit in each of said loop-around lines and in some of said link paths, and control means for controlling said switching stages, in accordance with information specifying a line termination of one of said certain lines and another termination between which a communication path is to be established,
Claim 19
Dependent Claim
7 words
An arrangement for providing range extension comprising:
Claim 20
Dependent Claim
7 words
An arrangement for providing range extension comprising:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |