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| Number | Title | Issue Date |
| 5850421 | Method and apparatus for estimating clock slew and carrier translation The present invention helps derive accurate clock and carrier translation presets in the presence of noise and various line shapes. The invention provides an adaptive algorithm that optimizes the calculations of clock slew (ƊTs) and frequency ... | 12/15/1998 |
| 5787248 | System for selecting network management protocol by setting protocol handler index based on newly selected protocol and selecting protocol handler address using protocol handler index Multiplexer (100) includes a plurality of resident network management protocol handlers (116, 118 and 120). The multiplexer user can select which one of the protocols to use from among the resident protocols to use for framing network management messages ... | 07/28/1998 |
| 5778414 | Performance enhancing memory interleaver for data frame processing Disclosed is a frame processing engine for receiving and processing a data frame having a header and a payload, comprising a first memory for receiving at least a portion of the header of the data frame; a second memory for receiving the payload of the da... | 07/07/1998 |
| 5757804 | Method and apparatus for eliminating offset calculations A data communication device (500) which is capable of providing inverse multiplexing, avoids having to perform address offset calculations by storing the incoming data from each of its incoming data channels in corresponding data buffers having predefined... | 05/26/1998 |
| 5709361 | Fan support member A fan support member (100) includes first (102) and second (104) cantilevered members extending from base member (116). In one embodiment, each of the cantilevered members (102 and 104) includes at least one retention member (106, 108, 110 and 112) which ... | 01/20/1998 |
| 5541933 | Auto-detection of DDS service and line rate Disclosed is a Digital Service Unit (DSU) which, in response to a digital signal from a Digital Data System (DDS) network, uses different techniques for different possible DDS services (include DDS-SC, CC64, and basic DDS services) to determine the type o... | 07/30/1996 |
| 5539801 | Removable telephone line protection module for an electronic device The present invention provides a removable telephone line surge protection circuit (104) for use by an electronic deuce such as a modem (102). The line protection circuit (104) protects the modem (102) against telephone line surges such as those caused by... | 07/23/1996 |
| 5450409 | Multiport-multipoint digital data service In a Digital Data System (DDS) a method and apparatus for providing multipoint multiport service. Differences in time delays through the network are compensated by an alignment training wherein the delays from each remote station are measured at a Central... | 09/12/1995 |
| 5388189 | Alarm filter in an expert system for communications network An Expert System 10 for providing diagnostics to a data communications network 5. Alarms from a Network Manager 24 are received and queued by an Event Manager 117 and then filtered by an Alarm Filter 118 to remove redundant alarms. Alarms which are ready ... | 02/07/1995 |
| 5359602 | Multiport-multipoint digital data service In a Digital Data System (DDS) a method and apparatus for providing multipoint multiport service. Differences in time delays through the network are compensated by an alignment training wherein the delays from each remote station are measured at a Central... | 10/25/1994 |
| 5337320 | Semi-automatic mode of network design An Expert System 10 for providing diagnostics to a data communications network 5. Alarms from a Network Manager 24 are received and queued by an Event Manager 117 and then filtered by an Alarm Filter 118 to remove redundant alarms. Alarms which are ready ... | 08/09/1994 |
| 5317742 | Dynamic translation of network management primitives to queries to a database A technique for dynamically translating network management primitives into operations on management information stored within a relational database hosting a management information base. A CMIP network management operation and argument is retrieved from a... | 05/31/1994 |
| 5295256 | Automatic storage of persistent objects in a relational schema A translator for translating objects defined in an object-oriented programming environment to a relational database schema permits persistent storage of object instances as records in a relational database. Object instances are mapped to entity tables wit... | 03/15/1994 |
| 5295230 | Knowledge representation for expert system An Expert System for providing diagnostics to a data communications network. Expert information is entered using a user friendly User Interface which reduces need for the participation of a Knowledge Engineer. The User Interface including a template for e... | 03/15/1994 |
| 5291583 | Automatic storage of persistent ASN.1 objects in a relational schema A translator for translating objects defined in Abstract Syntax Notation such as ASN.1 to a relational database schema permits persistent storage of object instances as records in a relational database. Object classes are mapped to entity tables with obje... | 03/01/1994 |
| 5268928 | Data modem with remote firmware update A data modem is provided with a boot ROM having a set of instructions for a programmable processor to perform its basic functions within the modem. Enhancements and firmware updates are downloaded over a telephone line through the modem's inherent communi... | 12/07/1993 |
| 5267300 | High speed digital data transmission over switched voice network A dialed telephone connection can be implemented as an end-to-end digital connection by virtue of switched voice transmission facilities becoming more prevalent. If such a connection is detected, it is possible to transmit digital data over the connection... | 11/30/1993 |
| 5259027 | Dial restoral method for digital circuits A switched digital circuit is used to restore a failed dedicated digital circuit to a remote station in conjunction with reconfiguration of the network's multipoint junction units (MJU). A circuit is established over the public switched digital network fr... | 11/02/1993 |
| 5222077 | Radix mapping with variable number of symbols in mapping period The present invention is directed toward a method and apparatus in a communications device for mapping a selected group of data bits into a predetermined number of two-dimensional symbols selected from a minimized alphabet of M two-dimensional symbols for... | 06/22/1993 |
| 5202985 | Apparatus and method for displaying data communication network configuration after searching the network In a data communication network, a method and apparatus for determining routing in a diagnostic channel utilizes a search token which is passed through nodes of a memory model of the network. The memory model represents nodes as one (or a combination of) ... | 04/13/1993 |
| 5200962 | Data compression with error correction A combined data compression/error correction system suitable for use in synchronous communication utilizes a data compressor to produce variable rate compressed data from synchronous data. The variable rate compressed data is applied to a FIFO memory whic... | 04/06/1993 |
| 5193152 | Network management system with group naming A method and apparatus for providing for arbitrary definintion of groups in a data communication network management system. Groups are added, modified, merged, deleted or displayed as desired by the user so that all members of the arbitrarily defined grou... | 03/09/1993 |
| 5185763 | Data bit to constellation symbol mapper The present invention is directed toward a method and apparatus in a communications device for mapping a selected group of data bits into a predetermined number of two-dimensional symbols selected from a minimized alphabet of M two-dimensional symbols for... | 02/09/1993 |
| 5165021 | Transmit queue with loadsheding An apparatus for managing transfer of a packet of information to one of a plurality of ports with each the port having an associated port speed includes a double linked list transmit queue and a plurality of port queues corresponding to the plurality of p... | 11/17/1992 |
