US4887260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X.25 Wide area network channel status display
Assignee: Agilent Technologies Inc
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Filing: 1987-02-17
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Granted: 1989-12-12
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Expires: 2007-02-17
Abstract
Abstract Provided is a channel status display for an X.25 wide area network (WAN) DTE-DCE interface. The invention, designed for use with a protocol analyzer, monitors X.25 level-2 frame traffic on the DTE-DCE link and produces a dynamic channel-activity-data-structure based upon the level-2 frames. An important class of level-2 frames are so-called I-frames. I-frames contain a 12-bit LCI (Logic Channel Identifier) field. The LCI number identifies up to 4095 channels over which network calls may be transmitted and received at the DTE-DCE interface. The LCI field of an I-frame is used to index an array of pointers. The pointers point to list members in a linked list of call-records. A call-record is a complete listing of call information for a given channel. The array of pointers and the linked list of call-records together make up the channel-activity-data-structure. The data-structure is updated with each new I-frame. The data-structure is continually mapped onto the display screen of the protocol analyzer so as to produce a Channel-Activity-Display and/or a Call-Record-Display. The Channel-Activity-Display is a matrix display showing the status of 256 DTE-DCE interface channels at once, indexed by LCI number. The viewer may page through all 4095 possible channels, viewing 256 channels at once. The Call-Record-Display is a display of the call-record for a viewer-selected channel.
Inventors
- 👤 Matthew J. Carden
- 👤 Kim Lantz
- 👤 Theresa L. Reh
- 👤 Anne Trytten
- 👤 Yves Lubino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:02
CPC Classifications
H; H04; H04L; H04L43/00; H04L43/08; H04L43/0805; H04L43/0811; H04L43/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
380 words
A dynamic communication channel status display system for monitoring channel activity on an X.25 wide area network DTE-DCE interface link, said display system showing the status of all possible logical channels at the interface link, said display system to be used with a protocol analyzer or a similar instrument, said display system comprising: a first display means for displaying a dynamic Channel Activity Display, said Channel Activity Display showing an n-by-m matrix arrangement of status characters wherein each status character is represetative of pre-determined logical channel status; said Channel Activity Display also having a status key indicating the meaning of each status character; cursor display means for displaying a cursor in said Display; cursor movement means for enabling a user of said display system to move said cursor to pre-determined positions within said Channel Activity Display; logical channel status identification means for identifying the status of at least one logical channel; association means for associating a pre-determined status character with a corresponding pre-determined logical channel status; logical channel group number (LCGN) numerical identification display means for numerically identifying and/or displaying an LCGN on said Channel Activity Display; logical channel identifier (LCI) numerical identification display means for numerically identifying and/or displaying an LCI number on said Channel Activity Display; said Channel Activity Display being user-configurable such that said n-by-m matrix shows the status of each logical channel in at least one LCGN of logical channels; said Channel Activity Display being further user-configurable to display an LCI number corresponding to the position of said cursor within said Channel Activity Display; and a second display means for displaying a dynamic Call Record Display, available as a display option to the viewer of said Channel Activity Display, said display system further comprising: organized-listing-call-information means for collecting, organizing and displaying an organized listing of call-information concerning a call on the logical channel corresponding to the position of the cursor in said Channel Activity Display, wherein said call-information includes an indication of at least one of the following: said logical channel's LCI number; a point in time at which said call on said logical channel was initiated; duration in time of said call; X.25 network addresses of the calling DTE and the called DTE of said call; number of X.25 level-3 packets exchanged in said call.
Claim 2
Dependent Claim
380 words
A dynamic communication channel status display system for monitoring channel activity on an X.25 wide area network DTE-DCE interface link, said display system showing the status of all possible logical channels at the interface link, said display system to be used with a protocol analyzer or a similar instrument, said display system comprising: a first display means for displaying a dynamic Channel Activity Display, said Channel Activity Display showing an n-by-m matrix arrangement of status characters wherein each status character is represetative of pre-determined logical channel status; said Channel Activity Display also having a status key indicating the meaning of each status character; cursor display means for displaying a cursor in said Display; cursor movement means for enabling a user of said display system to move said cursor to pre-determined positions within said Channel Activity Display; logical channel status identification means for identifying the status of at least one logical channel; association means for associating a pre-determined status character with a corresponding pre-determined logical channel status; logical channel group number (LCGN) numerical identification display means for numerically identifying and/or displaying an LCGN on said Channel Activity Display; logical channel identifier (LCI) numerical identification display means for numerically identifying and/or displaying an LCI number on said Channel Activity Display; said Channel Activity Display being user-configurable such that said n-by-m matrix shows the status of each logical channel in at least one LCGN of logical channels; said Channel Activity Display being further user-configurable to display an LCI number corresponding to the position of said cursor within said Channel Activity Display; and a second display means for displaying a dynamic Call Record Display, available as a display option to the viewer of said Channel Activity Display, said display system further comprising: organized-listing-call-information means for collecting, organizing and displaying an organized listing of call-information concerning a call on the logical channel corresponding to the position of the cursor in said Channel Activity Display, wherein said call-information includes an indication of at least one of the following: said logical channel's LCI number; a point in time at which said call on said logical channel was initiated; duration in time of said call; X.25 network addresses of the calling DTE and the called DTE of said call; number of X.25 level-3 packets exchanged in said call.
Claim 3
Dependent Claim
258 words
A dynamic communication channel status display system for monitoring channel activity on an X.25 wide area network DTE-DCE interface link, said display system showing the status of all possible logical channels at the interface link, said display system to be used with a protocol analyzer or a similar instrument, said display system comprising: a first display means for displaying a dynamic Channel Activity Display, said Channel Activity Display showing an n-by-m matrix arrangement of status characters wherein each status character is represented of pre-determined logical channel status; said Channel Activity Display also having a status key indicating the meaning of each status character; cursor display means for displaying a cursor in said Display; cursor movement means for enabling a user of said display system to move said cursor to pre-determined positions within said Channel Activity Display; logical channel status identification means for identifying the status of at least one logical channel; association means for associating a pre-determined status character with a corresponding pre-determined logical channel status; logical channel group number (LCGN) numerical identification display means for numerically identifying and/or displaying an LCGN on said Channel Activity Display; logical channel identifier (LCI) numerical identification display means for numerically identifying and/or displaying an LCI number on said Channel Activity Display; said Channel Activity Display being user-configurable such that said n-by-m matrix shows the status of each logical channel in at least one LCGN of logical channels; said Channel Activity Display being further user-configurable to display an LCI number corresponding to the position of said cursor within said Channel Activity Display.
Claim 4
Dependent Claim
258 words
A dynamic communication channel status display system for monitoring channel activity on an X.25 wide area network DTE-DCE interface link, said display system showing the status of all possible logical channels at the interface link, said display system to be used with a protocol analyzer or a similar instrument, said display system comprising: a first display means for displaying a dynamic Channel Activity Display, said Channel Activity Display showing an n-by-m matrix arrangement of status characters wherein each status character is represented of pre-determined logical channel status; said Channel Activity Display also having a status key indicating the meaning of each status character; cursor display means for displaying a cursor in said Display; cursor movement means for enabling a user of said display system to move said cursor to pre-determined positions within said Channel Activity Display; logical channel status identification means for identifying the status of at least one logical channel; association means for associating a pre-determined status character with a corresponding pre-determined logical channel status; logical channel group number (LCGN) numerical identification display means for numerically identifying and/or displaying an LCGN on said Channel Activity Display; logical channel identifier (LCI) numerical identification display means for numerically identifying and/or displaying an LCI number on said Channel Activity Display; said Channel Activity Display being user-configurable such that said n-by-m matrix shows the status of each logical channel in at least one LCGN of logical channels; said Channel Activity Display being further user-configurable to display an LCI number corresponding to the position of said cursor within said Channel Activity Display.
Claim 5
Dependent Claim
68 words
The display system of claim 2 further comprising a second display means for displaying a dynamic Call Record Display, available as a display option to the viewer of said Channel Activity Display, said second display means comprising: organized-listing-call-information means for collecting, organizing and displaying an organized listing of call-information concerning a call on the logical channel corresponding to the position of the cursor in said Channel Activity Display.
Claim 6
Dependent Claim
67 words
The display system of claim 3 wherein said call-information includes an indication of at least one of the following: said logical channel's LCI number; a point in time at which said call on said logical channel was initiated; duration in time of said call; X.25 network addresses of the calling DTE and the called DTE of said call; number of X.25 level-3 packets exchanged in said call.
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) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |