US3908087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time-division telecommunication system for the transmission of data via switched connections
Assignee: US Philips Corp
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Filing: 1974-05-09
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Granted: 1975-09-23
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Expires: 1994-05-09
Abstract
Abstract Time-division multiplex telecommunication system for data transmission via switched connections. In one channel of a data multiplex stuffing information is sent. The data multiplex is transmitted to a switching centre in a time channel of a highway, the time channel being connected to three internal outgoing time channels in said centre. From the information received from these three channels the original information is restored. The rate of the restored information is converted to the rate of an outgoing time channel by the addition or removal of stuffing information. The converted information is applied to in internal incoming time channel which is connected to an outgoing time channel for further transmisstion of the data.
Inventors
- 👤 Thijs Krol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:28
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/07; H04Q; H04Q11/00; H04Q11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
301 words
Time division multiplex telecommunication system for data transmission via switched connections, which system comprises a data transmitter for pulse groups which are transmitted in different pulse group positions of consecutive multiplex frames, a transmission highway using time division, means for sending the pulse groups of the pulse transmitter via the transmission highway in one time slot of a cyclic sequence of time slots, which time slot characterizes a time channel, a switching system having a plurality of incoming and outgoing transmission highways, which switching system includes means for connecting the time channels of the incoming transmission highways to arbitrary time chanels of the outgoing transmission highways, characterized in that the data transmitter includes means for continuously transmitting stuffing pulse groups in a particular pulse group position of the multiplex frame, in that the switching system comprises an internal outgoing transmission highway and an internal incoming transmission highway, in that the incoming time channel of the incoming transmission highway which is connected to the data transmitter is connected to three time channels of the internal outgoing transmission highway, in that a device connected to this transmission highway is provided for restoring the sequence of pulse groups supplied by the incoming time channel from the sequence of pulse groups which are received in the three time channels, in that means are provided for converting the pulse repetition rate of the restored sequence of pulse groups to the pulse repetition rate of an outgoing time channel by the addition or removal of stuffing pulse groups, in that means are provided for applying the converted sequence of pulse groups to an internal incoming time channel of the internal incoming transmission highway, and in that in order to complete the connection the internal incoming time channel is connected to a time of an outgoing transmission highway.
Claim 2
Dependent Claim
301 words
Time division multiplex telecommunication system for data transmission via switched connections, which system comprises a data transmitter for pulse groups which are transmitted in different pulse group positions of consecutive multiplex frames, a transmission highway using time division, means for sending the pulse groups of the pulse transmitter via the transmission highway in one time slot of a cyclic sequence of time slots, which time slot characterizes a time channel, a switching system having a plurality of incoming and outgoing transmission highways, which switching system includes means for connecting the time channels of the incoming transmission highways to arbitrary time chanels of the outgoing transmission highways, characterized in that the data transmitter includes means for continuously transmitting stuffing pulse groups in a particular pulse group position of the multiplex frame, in that the switching system comprises an internal outgoing transmission highway and an internal incoming transmission highway, in that the incoming time channel of the incoming transmission highway which is connected to the data transmitter is connected to three time channels of the internal outgoing transmission highway, in that a device connected to this transmission highway is provided for restoring the sequence of pulse groups supplied by the incoming time channel from the sequence of pulse groups which are received in the three time channels, in that means are provided for converting the pulse repetition rate of the restored sequence of pulse groups to the pulse repetition rate of an outgoing time channel by the addition or removal of stuffing pulse groups, in that means are provided for applying the converted sequence of pulse groups to an internal incoming time channel of the internal incoming transmission highway, and in that in order to complete the connection the internal incoming time channel is connected to a time of an outgoing transmission highway.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |