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| Number | Title | Issue Date |
| 6137780 | Apparatus and method to monitor communication system status A monitoring apparatus and method are provided for a communication system in which a central office communicates to at least one end unit using intermediate remote nodes. The remote node receives signals from both the central office and the end units. Eac... | 10/24/2000 |
| 6134221 | Method for evaluating a communication link between a first and a second communication site The present invention provides a method for evaluating a communication link between a first communication site and a second communication site. The first and second communication sites increment a sent counter and reset a received counter upon sending a m... | 10/17/2000 |
| 6130875 | Hybrid centralized/distributed precomputation of network signal paths Precomputation techniques for determining primary and/or restoration paths in an optical or electrical network. A hybrid centralized/distributed approach is provided in which certain information used in distributed precomputation is downloaded from a cent... | 10/10/2000 |
| 6115362 | Method and apparatus for determining frame relay connections A system determines that a frame relay connection exists between an interface on a first interface device and an interface on a second interface device, for example by comparing addresses resident in routing tables of the interface devices. The system the... | 09/05/2000 |
| 6112247 | Network controller for processing status queries A method is provided that allows a networked computer to generate a routable response to a status query without invoking its communication protocol stack. The computer is provided with a network controller that includes query detection and data routing mo... | 08/29/2000 |
| 6104702 | Apparatus and method for extending operation of non-intrusive monitors in SDH A method and apparatus for monitoring signals communicated over a signal path from a source to a destination with the signals containing a set of data representing a data signal type comprises a first device for accessing a first portion of the data set f... | 08/15/2000 |
| 6101167 | Path switching system A path switching apparatus which performs high-speed switching for quick recovery of an entire network is provide. The apparatus in advance stores information on possibility that an error affects other paths and, upon detecting an error, investigates a po... | 08/08/2000 |
| 6097702 | Performance monitoring data acquisition library A method is disclosed for configuring software for acquiring PM data from telecommunication equipment in response to PM signals generated by the equipment responsive to events, including the steps of maintaining a library of product-independent, event-res... | 08/01/2000 |
| 6091713 | Method and system for estimating the ability of a subscriber loop to support broadband services A method and system use voiceband transmission characteristics to estimate the viability of deploying broadband services over a subscriber loop in the public switched telephone network. The system gives network service providers the ability to predict the... | 07/18/2000 |
| 6088334 | System and method for determining end-to-end characteristics of a data communication channel A method for determining characteristics of a data communication channel between first and second data communication devices. The method includes the step of sending a relatively low power digital probe signal over said channel from said first to said sec... | 07/11/2000 |
| 6081503 | Control architecture using an embedded signal status protocol A network element with a centralized switch fabric is able to support multiple switching functions while meeting established performance requirements by using a control system based on an embedded signal status protocol. Generally, each input signal withi... | 06/27/2000 |
| 6081550 | Method of testing clock paths and network elements for carrying out the method The indicated test method makes it possible to test clock paths via which a reference clock is transmitted to synchronize network elements in a synchronous digital telecommunications system. To that end the reference clock is marked at the start of the cl... | 06/27/2000 |
| 6076952 | Fieldbus network configuration utility with improved parameter control A system and method for displaying and configuring parameters in a fieldbus configuration system. The fieldbus configuration utility first determines the devices and blocks present in the system, and then determines the parameters of each block. When the ... | 06/20/2000 |
| 6078596 | Method and system of SONET line trace The present invention generally relates to a network and method capable confirming proper communications of high data rate optical signals between communications network devices. In particular, the present invention teaches a method of creating a "Line Tr... | 06/20/2000 |
| 6075775 | Method of checking and correcting virtual path connection selection right of fixed-length cell handling exchanges The present invention relates to a technique for a method of checking virtual-path-connection selection rights of fixed-length cell handling exchanges. For each of the virtual path connections, a second fixed-length cell handling exchange notifies, as fir... | 06/13/2000 |
| 6069875 | Performance monitoring multiplexer module for packaging PM data A method is disclosed for packaging and collecting PM data generated in PM data modules having current and previous data banks as a source of PM data during a monitoring interval, including the steps of receiving a demarcation signal from a system timer i... | 05/30/2000 |
| 6067286 | Data network switch with fault tolerance An ATM data network switch having two separate but simultaneously active switch fabrics and a plurality of slot controllers is disclosed. Each slot controller has at least one external data link thereto and is separately connected to the two separate swit... | 05/23/2000 |
| 6067288 | Performance monitoring delay modules A method is disclosed for processing PM signals to be optionally applied to an accumulator PM data module for further analysis including the steps of monitoring first and second transmission line channels to detect events, generating first and second PM s... | 05/23/2000 |
| 6064654 | Internet facsimile timing technique An improved routing technique is disclosed whereby when a node becomes congested with data traffic, alternative nodes are utilized in order to maintain delays through the network to within acceptable limits. An originating node repetitively measures delay... | 05/16/2000 |
| 6061825 | Monitoring OAM cell assisted method to detect bit errors occurring in ATM useful cells on an ATM transmission link A monitoring OAM cell assisted method enables continuous intrasystem determination of bit errors which have occurred in ATM useful cells with a useful information field and a cell head on an ATM transmission link. First control bits are generated by evalu... | 05/09/2000 |
| 6058102 | Method and apparatus for performing service level analysis of communications network performance metrics A data transmission system includes probes connected between end user sites and a data switching network. Each probe is connected to the switching network via an access channel wherein transmission circuits establish paths between the sites through the ac... | 05/02/2000 |
| 6049529 | Integration of a path verification message within a signal A path verification message is integrated into a signal, or data stream, that traverses along a path connecting two end nodes of a distributed restoration network within a telecommunications network. To ensure that the integrated path verification message... | 04/11/2000 |
| 6049530 | Segment performance monitoring In a telecommunications network, segments along a telecommunications connection causing data corruption or data degradation can be detected and precisely identified through a segment performance monitoring technique. The segment performance monitoring tec... | 04/11/2000 |
| 6044064 | Method and system therefor of confining path verification signals within a distributed restoration network In a restoration network including a distributed restoration algorithm (DRA) enabled network of a telecommunications network, path verification messages are embedded onto traffic bearing signals entering the network and removed from the signals leaving th... | 03/28/2000 |
| 6032019 | Echo device method for locating upstream ingress noise gaps at cable television head ends A system and method for locating ingress noise gaps for an upstream data carrier in a cable network utilizing cable modems is described. A system for identifying a transmission frequency that has less noise than other available frequency bands includes a ... | 02/29/2000 |
| 6014370 | Apparatus for bridging between fibre channel networks and ATM network A bridging apparatus is provided to connect Fibre Channel networks to an ATM network. The apparatus includes a Fibre Channel-link monitoring section for monitoring and detecting an abnormal event in the Channel Fibre networks; an ATM network monitoring se... | 01/11/2000 |
| 6014369 | Method and apparatus for testing subscribers accommodated to service node in loop system An FTTH (Fiber to the HOME) or FITL (Fiber in the Loop) system comprises a FSN (Fiber Service Node) accommodating various types of subscribers and a RT (Remote Terminal) connected through an optical fiber cable to the FSN and connected through a multiplex... | 01/11/2000 |
| 6003089 | Method for constructing adaptive packet lengths in a congested network In a network, the efficiency of data transfer is improved. The network includes packets of data (100, 120). The invention begins by preserving an original packet (100). A larger packet (140) is then constructed by combining two packets (100, 120). Either ... | 12/14/1999 |
| 6002714 | Data, path and flow integrity monitor A method of monitoring the integrity of the path and flow of digital PCM data from a source end to a receiving end which includes generating a pseudo-random sequence of bits at the source end, transmitting the pseudo-random sequence of bits together with ... | 12/14/1999 |
| 6002671 | Test instrument for testing asymmetric digital subscriber lines A method of testing ADSL (asymmetric digital subscriber line) circuits is provided. A test instrument is connected to the customer premises end of the ADSL circuit, consisting of an ATU-C modem on the central office end and an ATU-R modem on the customer ... | 12/14/1999 |
| 5999103 | Method and system for assigning spare transmission links to restoral routes A restoration system for restoring a communications network following a failure of one or more communications network components. The restoration system identifies spare segments and spans of spare segments in the original network configuration, as well a... | 12/07/1999 |
| 5991264 | Method and apparatus for isolating network failures by applying alarms to failure spans A method and apparatus for analyzing a telecommunications network and isolating failures within the network first receives alarms from various nodes in the network as a result of a failure. The method selects one alarm and then retrieves topology data ass... | 11/23/1999 |
| 5982743 | Performance monitor system, transmission device and performance monitor method of transmission line The present invention is a transmission system with a performance monitor function. The system has an end office, an opposite office located opposite the end office and an intermediate office located between the end office and the opposite office. In the ... | 11/09/1999 |
| 5968130 | Bridge unit, frame transfer method of the bridge unit and computer program for frame transfer A location information management table 14 stores information on the location of the host both at present and prior to the movement. The host is movable based on the transmission address contained in the frame transmitted therefrom. The frame addressed to... | 10/19/1999 |
| 5966380 | Processing of TLV based link-state packets The method includes the steps of receiving new information about the node. Then, there is the step of comparing the new information about the node with old information about the node. Then, there is the step of updating the old information with the new in... | 10/12/1999 |
| 5959971 | Protection switching system for cellular control signals In a base station controller of a cellular communication system, a center-to-base time-division multiplexed (TDM) signal from a mobile switching center is demultiplexed into multiple downlink TDM signals and forwarded via transmission lines to a cell-site... | 09/28/1999 |
| 5956324 | Performance monitoring and test system for a telephone network A DS3 level access, monitor and test system for a telephone network. The system provides selective, and hitless, bit overwrite in any of the embedded DS1, DS0 and subrate channels in a DS3 signal. Multiple DS0 and subrate channels can be tested via the as... | 09/21/1999 |
| 5949754 | Communication control method in network system based on duplex loop transmission system A network manager, when a transmission is requested from any FA equipment under control by the network manager, sets a flag indicating a loop direction for transmission in a transmission frame and transmits the transmission frame to other stations, and wh... | 09/07/1999 |
| 5943318 | Detecting degradation in telecommunications local loop networks An arrangement for monitoring for degraded signals in the loop distribution plant of a telecommunications network. Network interface units (NIUs) are used as an interface between a transmission medium, such as a coax cable or a radio channel, and customer... | 08/24/1999 |
| 5943604 | Echo device method for locating upstream ingress noise gaps at cable television head ends A system and method for locating ingress noise gaps for an upstream data carrier in a cable network utilizing cable modems is described. A system for identifying a transmission frequency that has less noise than other available frequency bands includes a ... | 08/24/1999 |
