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Patent US4309765A successfully refreshed from Google Patents.
US4309765A
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US
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Process for transmitting items of information between devices of an indirectly controlled exchange system, in particular a telephone exchange system
Assignee: Siemens AG
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Filing: 1979-11-01
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Granted: 1982-01-05
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Expires: 1999-11-01
Abstract
Abstract In a process for transmitting items of information between devices of an indirectly controlled exchange system via time division multiplex (TDM) channels, with multiple repetition of the items of information, the items of information comprise a plurality of bytes including a number byte which numbers the relevant item of information. The items of information are transmitted by means of buffer stores and multiplexers. The item of information also include a acknowledgment bytes which acknowledge the correct reception of previously transmitted items of information. The reception of acknowledgement bytes is also evaluated as a signal that the TDM channel previously used to transmit the acknowledged information has been released for the transmission of a further item of information.
Inventors
- 👤 Helmut Mueller
- 👤 Hans P. von Ow
- 👤 Thomas Rambold
- 👤 Bernhard Werres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:38
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0407
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
146 words
A process for transmitting items of information between devices of an indirectly controlled exchange system via time division multiplex channels with multiple repetition of the items, in particular for a telephone exchange system equipped with time channel couplers, comprising the steps of: in a transmitting device, forming items of information each comprising a plurality of bytes including a number byte which identifies the relevant item of information; storing each item byte-wise into storage cells of a buffer store and outputting the items byte-wise in a regular cyclic operation; transmitting the items of information from the transmitting device to a receiving device; receiving the items of information in the receiving device; storing received items of information in a buffer store on the basis that bytes belonging to new items of information are stored only once; and outputting the new items of information after a complete recording cycle.
Claim 2
Dependent Claim
146 words
A process for transmitting items of information between devices of an indirectly controlled exchange system via time division multiplex channels with multiple repetition of the items, in particular for a telephone exchange system equipped with time channel couplers, comprising the steps of: in a transmitting device, forming items of information each comprising a plurality of bytes including a number byte which identifies the relevant item of information; storing each item byte-wise into storage cells of a buffer store and outputting the items byte-wise in a regular cyclic operation; transmitting the items of information from the transmitting device to a receiving device; receiving the items of information in the receiving device; storing received items of information in a buffer store on the basis that bytes belonging to new items of information are stored only once; and outputting the new items of information after a complete recording cycle.
Claim 3
Dependent Claim
43 words
The method of claim 1, wherein the step of storing received bytes is further defined as: comparing each received byte with the corresponding previously received byte; and in the event of inequality storing the new byte in place of the previously received byte.
Claim 4
Dependent Claim
25 words
The method of claim 2, comprising the further step of: supplying stored items of information from the receiving device buffer store during the recording interval.
Claim 5
Dependent Claim
105 words
The method of claim 2, wherein: said step of storing items in the transmitting device is further defined as storing the bits forming a byte in parallel and outputting the bits in parallel; said step of storing bytes in the receiving device is further defined as storing the bits forming a byte in parallel and outputting the bits in parallel; said steps of transmitting and receiving the items of information are further defined as transmitting and receiving the bits in series; and comprising the further steps of: converting the parallel bits into series for transmission; and converting the serially received bits into parallel for storage.
Claim 6
Dependent Claim
39 words
The method of claim 4, wherein the step of transmitting and receiving are further defined as: interlacingly demultiplexing the bits over a plurality of time division multiplex channels; and multiplexing the received bits to remove the interlace upon storage.
Claim 7
Dependent Claim
91 words
The method of claim 5, wherein the step of forming items of information is further defined as forming each item to include an acknowledgement byte including information representing the respective number byte, and comprising the further steps of: transmitting the acknowledgement byte from the receiving device to the transmitting device over a separate time division multiplex channel; receiving the acknowledgement byte at the transmitting device; and in the transmitting device, comparing the acknowledgement byte with the respective number byte to determine correct reception of the respective item by the receiving device.
Claim 8
Dependent Claim
38 words
The method of claim 6, comprising the further step of: in the receiving device, evaluating the receipt of the acknowledgement byte as a signal that the separate time division multiplex channel is released to transmit another acknowledgement byte.
Claim 9
Dependent Claim
83 words
The method of claim 7, wherein the items of information to be transmitted are supplied by a rhythmic operated control unit of a telephone exchange system which stores the items in a working memory, and the step of forming items of information is further defined as: feeding the items of information from the working memory to the buffer store at the operating rhythm of the system; and operating a counter to generate to insert the respective number byte in each item of information.
Claim 10
Dependent Claim
38 words
The method of claim 8, wherein the receiving device includes a control unit and said step of outputting items of information is further defined as: feeding the items of information to the last-mentioned control unit for further processing.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |