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5954829 |
System, method, and computer program product for digital cross connect testing
A computer testing system, method, and computer program product is provided for testing one or more digital cross connect devices (DXCs) with one or more test and monitoring units (TMUs). A DXC...
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5946301 |
Circuit for determining local area network speed
A circuit for sensing network speed in a test instrument for local area networks (LANs) is provided. After coupling the test instrument to the LAN of unknown speed, a link pulse is found among the...
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5946300 |
Device for transferring information between two digital signal generators
This device for transferring information between two digital signals includes means (26, 44; 62, 86) of selecting characteristics of a digital input signal, means (28, 46; 78, 94) of direct...
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5940412 |
Decoding method
A method for decoding information in a telecommunication network, in which the information frames are received, the data is buffered, decoded and a parity check is made. Before transmitting the...
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5940374 |
Mechanism for determining whether channel unit is installed in D4 channel bank slot
A D4 channel bank data bus monitoring scheme automatically determines if a channel unit connector slot is occupied, without having to gain physical access to the interior of the channel bank...
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5937004 |
Apparatus and method for verifying performance of digital processing board of an RF receiver
A testing apparatus for the digital processing portion of a satellite receiver. A software program generates an (I) and (Q) file of root cosine filtered (I) and (Q) DQPSK modulated sampled...
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5926460 |
Transmission monitoring system and method
A system and method that overcomes the deficiencies of prior television/multimedia system integrity monitoring schemes by providing a system and method wherein a remote field component receives a...
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5923740 |
Relief method of billing data in ATM switching system
A billing data is relieved by a relief method of billing data when a failure occurs on SVC (Switched Virtual Connection) calls which subscribers connect and disconnect. The relief method of billing...
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5920607 |
Adaptive wireless cell coverage
A system and method for controlling a wireless network such that degradation of service availability is reduced or eliminated. The present invention monitors a wireless network. In response to a...
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5917898 |
Telecommunications network traffic management system
An international telecommunications network includes a set of international exchanges located in a particular country which connect a national telecommunications network situated in that country...
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5913036 |
Raw performance monitoring correlated problem alert signals
A system and method for analyzing network performance by correlating network performance monitoring data reported by monitoring points in the network is described herein. The system analyzes the...
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5912701 |
Arrangement for measuring and controlling temporal relationships between channels of a multimedia communication system
A method for ascertaining the temporal relationship between two signals that traverse a network via two different channels concurrently sends a test signal through the two channels and evaluates...
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5905713 |
Method and apparatus for analyzing digital multi-program transmission packet streams
A method and device for monitoring a multi-program data stream. The data stream preferably contains digital packets multiplexed from different data and control channels. A service information...
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5897609 |
Multiple port protocol test apparatus and method thereof
An improved multiple port protocol test apparatus and a method thereof by which it is possible to more easily perform a test with respect to the multiple port protocol, and increase an adaptability...
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5892756 |
Portable telecommunication network testing device
A testing device for testing telecommunication digital lines referred to as high-cap or T-1 lines by introducing a go/no-go loop back signal to both line sides. The testing device uses a test loop...
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5889864 |
Data transmission systems
In a data transmission system in which a cyclic redundancy checksum value is derived in respect of each block of data bit values to be transmitted over the system, the checksum value in respect of...
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5887156 |
Evolution planning in a wireless network
Various operational measurements of a network element are determined in real time. These measurements are used to determine the call carrying capacity of the elements and the reaction of the...
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5887000 |
Centralized test apparatus for ATM exchange system
A centralized test apparatus is provided for an ATM exchange system. The test apparatus monitors cells transmitted through a specified line connected to an office unit of the exchange system or...
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5878030 |
Test access port for analyzing high-speed local area network switched environment
An interfacing device having two operational amplifiers that have been manufactured on the same IC die have high-impedance input terminals connected directly to the two conductors of a local area...
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5872770 |
Received asynchronous transfer mode layer operation and maintenance cell processing apparatus
A received ATM layer OAM cell processing apparatus for processing in real time a fault management cell among ATM layer OAM cells of F4/F5 levels applied to a user network interface and a network...
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5867557 |
Remotely controlled communication line diagnostic apparatus and method
A communication line diagnostic unit (10, 10') that allows telephone central office equipment to perform a test of a communication line and determine the ability of the line as a communication...
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5854808 |
Methods and apparatus for detecting the presence of a prescribed signal in a channel of a communications system
Methods and apparatus for detecting the presence of a particular signal among all the channels of interest in a cellular or similar type system are disclosed. A first method detects CDPD signals,...
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5854824 |
Connectivity scanner
An interconnection monitoring system for use with a multiple node wired network, the system comprising a plurality of transmitters, each located at a node of the network for transmitting a...
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5850426 |
Remote access terminal
A cost-efficient process and system for the centralized monitoring and/or control of a telephone network. The centralized computer system maintains simultaneous and continuous communications links...
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5835727 |
Method and apparatus for controlling access to services within a computer network
A method and apparatus for controlling access to services within a computer network is provided. More specifically, the present invention includes a services management system, or SMS. The SMS...
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5828651 |
Device for duplicating connectionless server
A device for duplicating a connectionless server whose reliability and performance are improved includes a physical hierarchy processor for converting connectionless input data into an electric...
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5821875 |
Data switching device
A data switching device which implement the data exchange between a plurality of terminals connected to the communication network. Even if the circuit connection exists in the relevant input port...
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5815298 |
System and method for wirelessly communicating a sound signal
A system for communicating a signal representing the amplitude of a sound signal received at a remotely located transceiver via an optical airlink communication network, the system having an...
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5805570 |
Method of simulating an ISDN-BRI central office switch using a single microcomputer
End-to-end call processing of an ISDN-BRI central-office switch is simulated using a polled multi-tasking method which is executed by a single microcomputer in an ISDN-BRI central-office emulator...
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5805605 |
Semiconductor integrated device
A semiconductor integrated device is disclosed which is capable of selectively executing a memory test and a logic test. The device includes a logic part for realizing a plurality of operation...
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5802446 |
Method and apparatus for testing a communication channel
A communication system having a transmitter that supplies test sequences formed from several test frequencies and a receiver having test means for testing the quality of a channel. The test means...
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5799003 |
OAM cell transmission method and system
In the case of an OAM cell for each of N paths being generated and transmitted at a rate of one OAM cell per a predetermined time period of 1 second in each of the N paths, first, N subperiods is...
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5793768 |
Method and apparatus for collapsing TCP ACKs on asymmetrical connections
A method and an apparatus that improves a data transmission rate in a TCP connection having an asymmetrical path. An intermediate node transmits a predetermined number k of data packets to a...
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5793749 |
Method and apparatus for communications testing using a recorded test message
A communication system (10) includes a duplex digital communication node (14) and a half-duplex digital communication node (12). The half-duplex node (12) is configured to perform duplex testing....
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5790523 |
Testing facility for a broadband communications system
A test system for evaluating the operating state of a headend of a broadband communications network for communicating telephony signals between a telephony system and subscribers of communications...
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5784411 |
Method and system for processing signals for use in a wireless communication system
A method of processing a received signal in a wireless communication system (20), the method comprising the steps of detecting a first digital signal at a first receiver (26), measuring timing...
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5781611 |
Method and apparatus for monitoring status of speech connection between central office lines
A method and apparatus for monitoring the status of a speech connection between central office lines in a private exchange system may be constructed with a controlling unit for controlling a...
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5777983 |
Asynchronous multiport controlling technique for a single system of a remote security administration system
An asynchronous multiport controlling technique in a single processor of a remote security administration system, for example, including a scanning unit, a VAN (value added network) main unit, an...
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5778003 |
Loop-back detection using out-of-band signalling
A method is described for detecting a loopback condition in a trunk. A predetermined bit pattern is inserted in an outgoing channel, and a corresponding incoming channel is continually monitored to...
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5761191 |
Statistics collection for ATM networks
An instrument for identifying the types of individual cells in a stream of ATM cells by individually examining the cell header and cell payload information of each cell. A microprogram within a...
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5757773 |
Multiplex distributed communication system having high sleep mode responsiveness
To provide a multiplex communication system where nodes can reliably shift to a sleep state even though the system has a very simple structure and even if abnormal conditions occur in any node,...
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5751964 |
System and method for automatic determination of thresholds in network management
Method and system for automatically determining and updating thresholds based on collected data samples for counter variables being monitored by a network management application. Historical data is...
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5740189 |
Integrity check method and system for serial-based communication
A method is provided for checking the integrity of a full duplex multi-word serial transfer between first and second devices, the transfer including an actual last word. The method includes...
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5737315 |
Traffic control device in private ATM network
If an illegal cell number is detected three times continuously for a monitor section in a connection, then tag information including class information indicating the lowest quality class is added...
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5737312 |
Cell assembly and disassembly apparatus in an ATM network
A call processor performs call set-up/release processing based upon absence/presence of valid data from an SVC service terminal and either decreases or increases an idle band of the network by an...
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5734641 |
Device and method for discriminating timeout
A device for discriminating timeout comprises an event discrimination unit, a calculation unit, a timing storage unit and a timeout discrimination unit. The event discrimination unit outputs each...
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5734697 |
Method and apparatus for improving telecommunications system performance
A method and apparatus are described which automatically allocate available physical resources of a telecommunications network to efficiently resolve network problems and improve the...
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5732070 |
Communication control apparatus
Disclosed is a communications-exchange apparatus which can re-establish a communication link with a plurality of terminals using a re-assigned TEI after the apparatus is reset. When the exchange is...
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5732124 |
Apparatus and method for detecting the status of a PCM channel
An apparatus and method are provided for determining the activity status of a PCM channel in a telecommunications system. The method (600-680) and apparatus (400) utilize a codec (220) within the...
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5732213 |
System and method of testing open systems interconnection (OSI) layers in telecommunication networks
A development test system and method for testing Open Systems Interconnection (OSI) layers 3 through 7 of a communications protocol utilized between nodes in a telecommunications network. The...
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