Patent US5579369A successfully refreshed from Google Patents.
US5579369A
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Facility type determination technique
Assignee: Nokia of America Corp
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Filing: 1995-10-11
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Granted: 1996-11-26
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Expires: 2015-10-11
Abstract
Abstract The disclosed facility type determination technique ascertains whether or not a facility connection is solely digital. In the disclosed embodiments, this information is used to establish the rate at which data is coupled through the facility connection. More specifically, a predetermined test signal including a pseudorandom sequence of digital signals is transmitted through the facility or combination of facilities connecting a data source to a data destination after the connection between the source and destination is established. The received test signal is examined at the destination and the examination results are used to determine the rate at which data is subsequently transmitted between the data source and data destination. Advantageously, this technique does not restrict network facility management and can be employed in a variety of data communication applications.
Inventors
- 👤 Alexander Feiner
- 👤 Burton R. Saltzberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:41
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/06; H04L; H04L1/00; H04L1/24; H04L5/00; H04L5/14; H04L5/1438; H04L5/1446
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
140 words
Apparatus for use in a communications system wherein data is communicated from a first location to at least one other location at various times via a facility connection which changes at different ones of said various times, said apparatus comprising means for transmitting a predetermined test signal from said first location to said other location via said facility connection at one of said various times; and means, responsive to an acknowledgment signal generated within each said other location and transmitted to said first location in response to said predetermined test signal, for determining whether said facility connection comprises a digital facility at said one of said various times, and said predetermined test signal is a pseudo-random sequence, which includes a first portion which is transmitted at a first rate and a second portion which is transmitted at a second rate.
Claim 2
Dependent Claim
140 words
Apparatus for use in a communications system wherein data is communicated from a first location to at least one other location at various times via a facility connection which changes at different ones of said various times, said apparatus comprising means for transmitting a predetermined test signal from said first location to said other location via said facility connection at one of said various times; and means, responsive to an acknowledgment signal generated within each said other location and transmitted to said first location in response to said predetermined test signal, for determining whether said facility connection comprises a digital facility at said one of said various times, and said predetermined test signal is a pseudo-random sequence, which includes a first portion which is transmitted at a first rate and a second portion which is transmitted at a second rate.
Claim 3
Dependent Claim
33 words
The apparatus of claim 1 wherein said apparatus includes means for processing the data to be communicated from said first location to said second location subsequent to the receipt of said acknowledgment signal.
Claim 4
Dependent Claim
32 words
The apparatus of claim 2 wherein said apparatus further includes means, responsive to said acknowledgment signal received by said receiving means, for altering the processing of data provided by said processing means.
Claim 5
Dependent Claim
29 words
The apparatus of claim 3 wherein said altering means in response to said acknowledgment signal causes said processing means to process the data in one of several alternative modes.
Claim 6
Dependent Claim
73 words
The apparatus of claim 4 wherein the data to be communicated has values which vary with time and in one of the alternative modes the data to be communicated from said first location to said second location is processed in a manner wherein each data value is coupled through said facility connection and another of the alternative modes the data values to be communicated are altered prior to coupling to said facility connection.
Claim 7
Dependent Claim
43 words
The apparatus of claim 5 wherein said another of the alternative modes the data values to be communicated are transformed into another signal which is a digital representation of a modulated analog carder signal which, in turn, is representative of the data values.
Claim 8
Dependent Claim
25 words
The apparatus of claim 3 wherein said altering means varies the rate at which the data to be communicated is coupled to said facility connection.
Claim 9
Dependent Claim
13 words
The apparatus of claim 1 wherein said apparatus is disposed within a PBX.
Claim 10
Independent Claim
119 words
A method for use in a communications system wherein data is communicated from a first location to at least one other location at various times via a facility connection which changes at different ones of said various times, said method comprising the steps of transmitting a predetermined test signal from said first location to said other location via said facility connection at one of said various times; and determining, in response to an acknowledgment signal generated within each said other location in response to said predetermined test signal and transmitted from each said other location, whether said facility connection comprises a digital facility at said one of said various times, and said predetermined test signal is a pseudorandom sequence.
Claim 11
Independent Claim
119 words
A method for use in a communications system wherein data is communicated from a first location to at least one other location at various times via a facility connection which changes at different ones of said various times, said method comprising the steps of transmitting a predetermined test signal from said first location to said other location via said facility connection at one of said various times; and determining, in response to an acknowledgment signal generated within each said other location in response to said predetermined test signal and transmitted from each said other location, whether said facility connection comprises a digital facility at said one of said various times, and said predetermined test signal is a pseudorandom sequence.
Claim 12
Dependent Claim
127 words
Apparatus for use in a communications system wherein data is communicated from a first location to at least one other location at various times via a facility connection which changes at different ones of said various times, said apparatus comprising means for transmitting a predetermined test signal from said first location to said other location via said facility connection at one of said various times; and means, responsive to an acknowledgment signal generated within each said other location and transmitted from each said other location in response to said predetermined test signal, for determining whether said facility connection comprises a digital facility at said one of said various times, and said predetermined test signal includes first and second portions which are each transmitted at a different rate.
Claim 13
Dependent Claim
127 words
Apparatus for use in a communications system wherein data is communicated from a first location to at least one other location at various times via a facility connection which changes at different ones of said various times, said apparatus comprising means for transmitting a predetermined test signal from said first location to said other location via said facility connection at one of said various times; and means, responsive to an acknowledgment signal generated within each said other location and transmitted from each said other location in response to said predetermined test signal, for determining whether said facility connection comprises a digital facility at said one of said various times, and said predetermined test signal includes first and second portions which are each transmitted at a different rate.
Claim 14
Dependent Claim
13 words
The apparatus of claim 10 wherein said predetermined test signal is pseudorandom sequence.
Claim 15
Dependent Claim
13 words
The apparatus of claim 10 wherein said apparatus is disposed within a PBX.
Claim 16
Dependent Claim
33 words
The apparatus of claim 10 wherein said apparatus includes means for processing the data to be communicated from said first location to said second location subsequent to the receipt of said acknowledgment signal.
Claim 17
Dependent Claim
32 words
The apparatus of claim 13 wherein said apparatus further includes means, responsive to said acknowledgment signal received by said receiving means, for altering the processing of data provided by said processing means.
Claim 18
Dependent Claim
20 words
The apparatus of claim 1 wherein said data is communicated at a clocked rate in response to said acknowledgment signal.
References Cited (Backward Citations)
US3956601A
Cited
US4023098A
Cited
US4093940A
Cited
US4069392A
Cited
US4188580A
Cited
US4275348A
Cited
US4697157A
Cited
US4864612A
Cited
US4961185A
Cited
US5134611A
Cited
US5127041A
Cited
US5144230A
Cited
US5267300A
Cited
US5311569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-26 | 2000-05-27 | 2000-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-26 | 2004-05-27 | 2004-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-26 | 2008-05-27 | 2008-11-26 | $7700.00 | Window Closed / Lapsed |