Patent US3721767A successfully refreshed from Google Patents.
US3721767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delay compensation in multiplex transmission systems
Assignee: AT&T Inc
•
Filing: 1971-12-28
•
Granted: 1973-03-20
•
Expires: 1991-12-28
Abstract
Abstract A time assignment speech interpolation system is disclosed utilizing time-shared common control processing circuits. Speech signals from a plurality of trunks are interpolated on a lesser plurality of transmission channels by connecting trunks only during active periods. In order to accommodate transmission channels of varying delay times (e.g., cable and satellite channels), receiving terminal switching operations are delayed for a time corresponding to the transmission delay of the corresponding channel. This is implemented by common control digital delay time-out for each new connection.
Inventors
- 👤 Marche R La
- 👤 C May
- 👤 C Rosenthal
- 👤 F Saal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:26
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/17; H04B; H04B7/00; H04B7/005
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
75 words
A remotely-controlled switching system comprising a plurality of transmission channels of different lengths, a plurality of signal sources, means for connecting active ones of said signal sources to said transmission channels, means, utilizing a selected one of said transmission channels, for identifying each source-channel connection to a remote receiving station, and means at said receiving station for duplicating the identified connections, but delayed by an interval proportional to the respective lengths of the different channels.
Claim 2
Dependent Claim
75 words
A remotely-controlled switching system comprising a plurality of transmission channels of different lengths, a plurality of signal sources, means for connecting active ones of said signal sources to said transmission channels, means, utilizing a selected one of said transmission channels, for identifying each source-channel connection to a remote receiving station, and means at said receiving station for duplicating the identified connections, but delayed by an interval proportional to the respective lengths of the different channels.
Claim 3
Dependent Claim
48 words
The remotely controlled switching system according to claim 1 comprising common control processing circuits for selecting a transmission channel for each said active signal source, time division switching means for interconnecting said transmission channels, and circulating digital stores for storing digital connection control information in time separated timeslots.
Claim 4
Dependent Claim
18 words
The remotely controlled switching system according to claim 1 wherein said transmission channels include a submarine communications cable.
Claim 5
Dependent Claim
18 words
The remotely controlled switching system according to claim 1 wherein said transmission channels include a communications satellite station.
Claim 6
Dependent Claim
17 words
The remotely controlled switching system according to claim 1 wherein said signal sources comprise telephone subscribers'' lines.
Claim 7
Dependent Claim
63 words
The remotely controlled switching system according to claim 1 wherein said means for connecting sources to channels includes means for selecting currently active signal sources as candidates for connection, means for selecting currently unused transmission channels as candidates for disconnection, and means responsive to the respective delay times of the new and old channels for assigning the connection candidate to the disconnection candidate.
Claim 8
Dependent Claim
27 words
The remotely controlled switching system according to claim 6 further including means for selecting said candidate for connection from a queue of signal sources requiring a connection.
Claim 9
Dependent Claim
29 words
The remotely controlled switching system according to claim 6 further including means for selecting said candidate for disconnection from a queue of signal sources no longer requiring a connection.
Claim 10
Dependent Claim
66 words
The remotely controlled switching system according to claim 6 further including means for selecting said candidate for disconnection on a priority basis in the following order of priority; first, selecting a channel previously withdrawn from service for maintenance, second, selecting a channel connected to a signal source which has been disconnected from said switching system, and third, selecting a channel connected to an inactive signal source.
Claim 11
Dependent Claim
91 words
A multiplex transmission system comprising a transmission facility including a plurality of diverse transmission paths of differing transmission delays, a plurality of signal sourceS competing for said transmission paths, transmission switching means for connecting active signal sources to said transmission paths, separate and independent signal paths for signaling each connection of said active signal sources to said transmission paths, and receiving switching means for delaying the connection of signal receivers, corresponding to said signal sources, to said transmission paths for a period proportional to the respective delays of said transmission paths.
Claim 12
Dependent Claim
91 words
A multiplex transmission system comprising a transmission facility including a plurality of diverse transmission paths of differing transmission delays, a plurality of signal sourceS competing for said transmission paths, transmission switching means for connecting active signal sources to said transmission paths, separate and independent signal paths for signaling each connection of said active signal sources to said transmission paths, and receiving switching means for delaying the connection of signal receivers, corresponding to said signal sources, to said transmission paths for a period proportional to the respective delays of said transmission paths.
Claim 13
Dependent Claim
93 words
A time assignment speech interpolation system comprising a plurality of signal sources and corresponding remote signal utilization circuits, a lesser plurality of transmission channels having different delay times, switching means for connecting active ones of said signal sources to available ones of said transmission channels on a time division basis, signaling means for identifying all signal source-transmission channel connections, and means responsive to said signaling means for delaying the connection of each transmission channel to the corresponding signal utilization circuit for a period substantially equal to the delay time of that transmission channel.
Claim 14
Dependent Claim
93 words
A time assignment speech interpolation system comprising a plurality of signal sources and corresponding remote signal utilization circuits, a lesser plurality of transmission channels having different delay times, switching means for connecting active ones of said signal sources to available ones of said transmission channels on a time division basis, signaling means for identifying all signal source-transmission channel connections, and means responsive to said signaling means for delaying the connection of each transmission channel to the corresponding signal utilization circuit for a period substantially equal to the delay time of that transmission channel.
Claim 15
Dependent Claim
76 words
In a time assignment speech interpolation system having a plurality of signal sources and a lesser plurality of transmission channels means for assigning active sources to available channels on an instantaneous time assignment basis, means for transmitting said assignments to a remote terminal for duplicating said assignments at said remote terminal, and means at said remote terminal for delaying each of said assignments for a period equal to the transit time delay of the corresponding channel.
Claim 16
Dependent Claim
76 words
In a time assignment speech interpolation system having a plurality of signal sources and a lesser plurality of transmission channels means for assigning active sources to available channels on an instantaneous time assignment basis, means for transmitting said assignments to a remote terminal for duplicating said assignments at said remote terminal, and means at said remote terminal for delaying each of said assignments for a period equal to the transit time delay of the corresponding channel.
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 |