Patent US3786187A successfully refreshed from Google Patents.
US3786187A
Expired / Lapsed
US
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Apparatus for testing systems and data transmitting networks by simulation
Assignee: ALITALIA LINEE AEEREE ITALIANE SPA IT
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Filing: 1971-11-24
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Granted: 1974-01-15
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Expires: 1991-11-24
Abstract
Abstract An apparatus for testing systems and networks for data transmission by simulation, comprising a character generator of arranged to generate under control a pre-fixed sequence of characters; comparator means for comparing the characters produced by said generator with a sequence of received characters; means for controlling a transmission of the sequence of characters produced by said generator consequent to a favourable comparison; means for causing the apparatus to stop operating consequent to an unfavourable comparison.
Inventors
- 👤 Vita L De
- 👤 E Mancini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:09
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
An apparatus for testing data transmission systems between two or more data terminals, comprising means for generating and storing a call message, including fixed and presettable characters, means for sending said call message, receiving means for receiving an answer message sent in response to said call message from a remote data terminal, and comparator means for comparing said received answer message from said remote data terminal with said stored message; means for repeating the sending of said call message if the received answer message coincides with said stored message, and means for optionally introducing a time delay between the receiving of an answer message which does not coincide with said stored message and the sending of a new call message.
Claim 2
Independent Claim
120 words
An apparatus for testing data transmission systems between two or more data terminals, comprising means for generating and storing a call message, including fixed and presettable characters, means for sending said call message, receiving means for receiving an answer message sent in response to said call message from a remote data terminal, and comparator means for comparing said received answer message from said remote data terminal with said stored message; means for repeating the sending of said call message if the received answer message coincides with said stored message, and means for optionally introducing a time delay between the receiving of an answer message which does not coincide with said stored message and the sending of a new call message.
Claim 3
Dependent Claim
31 words
An apparatus according to claim 1 further comprising means for the repetitive sending of call messages towards a remote data terminal regardless of the possible answer of the said remote data.
Claim 4
Dependent Claim
49 words
An apparatus according to claim 1 further comprising means for the repetitive sending of call messages towards a remote data terminal, regardless of the possible answer of the said remote data terminal, and further including means for introducing a predetermined time delay between the subsequent sending of call messages.
Claim 5
Dependent Claim
125 words
An arrangement for testing data transmission systems including at least two data terminals, each of said terminals including a means for generating and storing a call message including fixed and presettable characters, means for sending said call message, receiving means for receiving an answer message sent in response to said call message from said other data terminal, and comparator means for comparing said received answer message from said other data terminal with said stored message; means for repeating the sending of said call message if the received answer message coincides with said stored message, and means for optionally introducing a time delay between the receiving of an answer message which does not coincide with said stored message and the sending of a new call message.
Claim 6
Dependent Claim
125 words
An arrangement for testing data transmission systems including at least two data terminals, each of said terminals including a means for generating and storing a call message including fixed and presettable characters, means for sending said call message, receiving means for receiving an answer message sent in response to said call message from said other data terminal, and comparator means for comparing said received answer message from said other data terminal with said stored message; means for repeating the sending of said call message if the received answer message coincides with said stored message, and means for optionally introducing a time delay between the receiving of an answer message which does not coincide with said stored message and the sending of a new call message.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |