US3983330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
TDM switching network for coded messages
Assignee: Alcatel Lucent NV
•
Filing: 1975-04-11
•
Granted: 1976-09-28
•
Expires: 1995-04-11
Abstract
Abstract A time-space-time division switching network for transmitting multiplexed signals. A speech memory is associated with each incoming time switch for the first stage and with each outgoing time switch for the final stage. The intermediate space switching stage has plural parallel planes which are independent of one another and each plane is capable of transmitting messages in serial form. The memories allow regrouping of messages from parallel planes into serial form for output over a single multiplex line.
Inventors
- 👤 Erich Tongi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:42
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
207 words
A switching network for receiving coded messages in serial form from a plurality of multiple-channel multiplex lines and for transmitting said messages in serial form to multiple-channel multiplex output lines comprising, means for converting said messages from serial to parallel form, said switching network including a plurality of identical space-division switching planes, each plane comprised of a plurality of crosspoints of intersecting alignments of conductors, with one alignment of conductors representing input lines and the other alignment representing output lines, each of said switching planes being completely independent of one another, conductors in each alignment grouped homologously with conductors in the remaining planes, means for controlling the crosspoints, each switching plane being capable of transmitting a different complete message in serial form through its own crosspoints, said switching network further including means for converting messages received at the input of said network in serial form into parallel form corresponding to respective different channels of the network for routing successive messages to the successive input conductors of a group in said parallel planes, means for transmitting each message in serial form across the respective space switching planes, and means for regrouping messages received in serial form from the respective planes for transmission over the respective multiplex output lines.
Claim 2
Dependent Claim
207 words
A switching network for receiving coded messages in serial form from a plurality of multiple-channel multiplex lines and for transmitting said messages in serial form to multiple-channel multiplex output lines comprising, means for converting said messages from serial to parallel form, said switching network including a plurality of identical space-division switching planes, each plane comprised of a plurality of crosspoints of intersecting alignments of conductors, with one alignment of conductors representing input lines and the other alignment representing output lines, each of said switching planes being completely independent of one another, conductors in each alignment grouped homologously with conductors in the remaining planes, means for controlling the crosspoints, each switching plane being capable of transmitting a different complete message in serial form through its own crosspoints, said switching network further including means for converting messages received at the input of said network in serial form into parallel form corresponding to respective different channels of the network for routing successive messages to the successive input conductors of a group in said parallel planes, means for transmitting each message in serial form across the respective space switching planes, and means for regrouping messages received in serial form from the respective planes for transmission over the respective multiplex output lines.
Claim 3
Dependent Claim
98 words
A switching network for coded messages according to claim 1, including message memories associated with the respective incoming multiplex lines, wherein the means for transmitting messages in serial form to each of the said space-division switching planes include as many message distribution circuits as there are incoming multiplex lines, and said message distribution circuits include as many parallel-series conversion circuits as there are space-division switching planes, each of the said parallel-series conversion circuits of a message distribution circuit delivering in serial form to its associated switching plane the messages received in parallel form from the associated message memory.
Claim 4
Dependent Claim
120 words
A switching network for coded messages according to claim 1, further including message memories associated with the outgoing multiplex lines, wherein the means for regrouping messages coming in serial form from the different space-division switching planes include as many message regrouping circuits as there are outgoing multiplex lines, and said message regrouping circuits include as many series-parallel conversion circuits as there are space switching planes, each of the series-parallel conversion circuits of a message regrouping circuit receptive of messages in serial form from a switching plane associated therewith and each message regrouping circuit including a logic circuit controlled by signals coming from a timing unit for delivering these messages in time succession in parallel form to the associated message memory.
Claim 5
Dependent Claim
57 words
A switching network for coded messages according to claim 1, wherein the means for controlling crosspoints include address memories each representing the address of a crosspoint to be closed, and address distribution circuits associated with the respective address memories permitting these crosspoint addresses to be routed and transmitted in turn to each of the space switching planes.
Claim 6
Dependent Claim
68 words
A switching network for coded messages according to claim 4, wherein each address memory is associated with the same alignment of conductors in different space switching planes and each address memory is connected to an address distribution circuit for routing and transmitting in serial form addresses received in parallel form from its address memory in turn to crosspoint selecting circuits respectively associated with the different space switching planes.
Claim 7
Dependent Claim
45 words
A switching network for coded messages according to claim 2 wherein each message between the message distribution or message regrouping circuits on the one hand, and the space-division switching planes on the other hand, is transmitted in hybrid series-parallel form over two or more conductors.
Claim 8
Dependent Claim
146 words
A switching network for coded messages transmitted by time-division multiplexing over multiplex lines each having several time channels, including a set of identical space-division switching planes comprised of crosspoints at the intersections of input lines and output lines, and means for controlling the said crosspoints, wherein said set of space-division switching planes is divided into groups of planes, with each group completely independent from each other group, and each group being capable of transmitting different messages, each of the planes of one group transmitting in serial form only one message of a communication while the other messages of said communication are transmitted respectively by the other planes of the said group, said network further including means for storing messages at the input of said network, means for distributing messages for serial transmission through said planes, and means for regrouping messages at the output of said network.
Claim 9
Dependent Claim
146 words
A switching network for coded messages transmitted by time-division multiplexing over multiplex lines each having several time channels, including a set of identical space-division switching planes comprised of crosspoints at the intersections of input lines and output lines, and means for controlling the said crosspoints, wherein said set of space-division switching planes is divided into groups of planes, with each group completely independent from each other group, and each group being capable of transmitting different messages, each of the planes of one group transmitting in serial form only one message of a communication while the other messages of said communication are transmitted respectively by the other planes of the said group, said network further including means for storing messages at the input of said network, means for distributing messages for serial transmission through said planes, and means for regrouping messages at the output of said network.
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) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |