Matches 151 - 200 out of 270 < 1 2 3 4 5 6 >
Match Document Document Title
6028846 Method and system for testing real-time delivery of packets of data  
A method and system for testing real-time delivery of packets of data in an application utilized in a computer network includes a first host computer, a second host computer, and a simulator all...
6002665 Technique for realizing fault-tolerant ISDN PBX  
A technique for realizing a fault tolerance of an integrated services digital network private branch exchange (ISDN PBX), includes: dualizing main control devices of the ISDN PBX into an operating...
5982751 Rare probability connection call registration method using payload type indication field information for asynchronous transfer mode switching system  
An improved rare probability connection call registration method using a PTI field information for an asynchronous transfer mode switching system which is capable of registering a rare probability...
5949759 Fault correlation system and method in packet switching networks  
In case of a failure in a high speed packet switching network, the failure information provided by the multiplicity of resources is registered in the access nodes of the network. The failure...
5946373 Topology-based fault analysis in telecommunications networks  
A method and apparatus for detecting traffic-affecting failures in a telecommunications network; by inferring the most probable location of each such failure, given multiple alarm indicators along...
5940376 Method and apparatus to establish a tap-point in a switched network using self-configuring switches having distributed configuration capabilities  
A method and apparatus for monitoring data sent between a source node and destination node in a switched network, wherein the switches configure themselves to establish a connection path to a probe...
5937032 Testing method and apparatus for verifying correct connection of curcuit elements  
A method and apparatus for testing for correct connection together of circuit elements in a circuit formed of a plurality of redundant circuit portions. A coded signal is generated at a first...
5920257 System and method for isolating an outage within a communications network  
A system and method for isolating an outage within a communications network comprising a database containing the configuration of switching elements within a network and a plurality of instructions...
5920609 Metallic access test extension system architecture  
A metallic access test extension system architecture for a digital transmission system is provided. The digital transmission system includes a local end and a plurality of remote ends, each of said...
5920608 Measurement device for communication  
A measurement device for communication purposes is disclosed that enables a plurality of differing measurement functions, and moreover, the addition of measurement functions. A measurement device...
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...
5905744 Test mode for multifunction PCI device  
In a multifunction PCI device containing identical backend functions or other large, redundant functional blocks, a single backend function is selected as a primary function while in test mode. All...
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...
5883883 Apparatus and method for testing the administration of network based supplementary services  
Whether or not the provisioning of a given BRI is properly administered is determined by providing a collection of processes which exercise the known network provided supplementary services in a...
5881052 Line signal analyzing method for use in an electronic switching system  
A method for use in an electronic switching system (ESS) analyzes M×N sets of line signals communicating between itself and at least one other ESS. At a first step, two previous sending and...
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...
5864559 ISDN modem capable of self-configuring to use one of a variety of pre-programmed ISDN protocols  
An ISDN modem is preprogrammed to operate by any one of multiple ISDN protocols, and is provided with a setup program wherein, with the modem connected to an ISDN switch, the multiple protocols are...
5850387 Processor device for terminating and creating synchronous transport signals  
In the inbound direction, a tributary processor (32) includes an SPE encoder/decoder for extracting a synchronous payload envelope (SPE) from an STS-1P signal. A path terminator (62) may extract...
5825751 Method and apparatus for tracing frames transmitted through a network path  
A data section or a set of data sections (frames or cells) are transmitted through a plurality of network nodes. The network path taken by the data section or the set of data sections (frames or...
5822304 Scanning for active ATM virtual channel/virtual path identifiers  
An instrument and a method for identifying active channels in a communications system, especially a system operating according to the asynchronous transfer mode (ATM) protocol in which data cells...
5818842 Transparent interconnector of LANs by an ATM network  
A computer communications network comprises a plurality of interconnected ATM switches forming a WAN or LAN area network over which ATM cells are transmitted, and a plurality of user devices...
5812530 Network emulator in asynchronous transfer mode  
A network emulator in asynchronous transfer mode, consisting of emulating the performance of a digital network of integrated wideband services operating in asynchronous transfer mode, with no need...
5812290 Optical switching unit and control method for same  
The present invention provides means by which a switch controller that manages lines directly notifies receivers of ineffectiveness of received data upon line disconnection instead of any...
5809108 Automated test call generation and execution system  
A test system and method that generates and executes test calls and verifies signaling for test calls using in-band, out-of-band and ISDN signaling. The test system captures signaling data from the...
5805668 Electronic switching system for testing the status of subscriber components contained therein  
A novel system includes a first interfacing unit connected to a sending subscriber for converting analog subscriber information transmitted from the sending subscriber via a first subscriber line...
5793746 Fault-tolerant multichannel multiplexer ring configuration  
A wiring scheme for providing loop-back capability for individual failed channels around a ring network composed of nodes with limited space-switching. With this invention each node has a switch...
5793751 Apparatus and method for ISDN provision verification  
Provisioning a Central Office (CO) Basic Rate Interface (BRI) access is a complex procedure which involves hundreds, and potentially thousands, of parameters that must be asserted to configure the...
5784406 Method and apparatus for objectively characterizing communications link quality  
A method and apparatus for characterizing a communications link. An apparatus is disclosed for performing a series of tests that measure delay time, frequency response, background noise, frame...
5778049 Service engineering template  
A method and system for recording and tracking information related to telecommunication services. A centralized computer database system comprising a plurality of service engineering templates...
5764727 Metallic access test extender  
A metallic access test extender includes an office unit and a remote unit coupled to the office unit via a digital transmission system. A voltage controlled current source is included in the office...
5764626 Rate-matched cell identification and modification, replacement, or insertion for test and measurement of ATM network virtual connections  
A test instrument for monitoring operation of ATM communication networks is capable of identifying individual cells passing through a node to which the instrument is connected as belonging to a...
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...
5757778 Apparatus for testing protocols and traffics in broadband integrated services digital networks and the method thereof  
The present invention provides an apparatus and a method for testing protocol and traffic levels in broadband integrated services digital networks(B-ISDNs). The apparatus includes a test control...
5754532 Use of multipoint connection services to establish call-tapping points in a switched network  
Method and apparatus for providing a call-tapping point in a switched network with point-to-multipoint functionality. The tapping point is added as an additional destination for data being sent...
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...
5727051 System and method for adaptive routing on a virtual path broadband network  
A general dimensioning method and system for allocating limited transmission resources to virtual paths and virtual networks on a physical network given offered traffic on each virtual path or...
5721728 Network node testing method and apparatus  
Disclosed is a method and apparatus for testing segmentation and reassembly functionalities of a communication network signalling node. A test signal is provided to a message transfer part ("MTP")...
5703871 Facilities data link handler in a performance monitoring and test system  
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....
5701293 Trouble surveillance apparatus for a transmission system  
An input memory storing data representing lines and paths of the transmission system. Every time such data is input in the memory, a comparison element compares the previous state of the system...
5691977 Virtual channel converter and VCC table access method  
In a data access device for writing into or read from a data conversion table on the basis of a clock signal extracted from a cell being transferred over a line, a clock signal generator of the...
5692030 Electronic interface for exchange of trouble administration information in telecommunications  
Telecommunications electronic interface exchanges trouble administration information between a long distance carrier and a Telco site. The interface provides fast and cost-effective electronic...
5668800 Path testing in communications networks  
A packet communications network includes both packet switched and circuit switched transmission links. A path test command launched from a source resource on the network to a destination resource...
5638357 Distributed method for periodical routing verification test scheduling  
There is disclosed a method for scheduling verification tests to audit routing information in a packet switching network comprising a plurality of packet switching nodes and a plurality of...
5592530 Telephone switch dual monitors  
A system is provided for monitoring the operations of a mated pair of switching nodes in a telephone network. A first monitor is provided which is operable to capture data on all of the connection...
5553058 Centralized load minimizing method for periodical routing verification tests scheduling  
There is disclosed a method for scheduling verification tests to audit routing information in a packet switching network comprising a plurality of packet switching nodes and a plurality of...
5537391 Exchange apparatus and method for testing the same  
The present invention relates to an exchange apparatus and a method for testing an exchange apparatus. The exchange apparatus includes layer 1 process normality confirming means for confirming the...
5504754 Method and arrangement for the load testing of a switch for cell structured digital data  
A switching unit (1) for the switching through of different types of digital data in the asynchronous transfer mode, a so-called ATM-switch, is to be tested whether it is able to overcome a...
5500851 Fixed-length packet switching system adapted for function test  
An ATM exchanger includes a plurality of switch units connected in multiple stages, in which a circuit is provided for writing a test cell pattern into and reading it from a buffer memory of each...
5442697 Digital data loopback device  
The need to equip a digital data service termination with the ability to decode digital loopback commands is obviated by a relatively simple hardware modification of a four wire telephone circuit...
5408461 Path route test apparatus for use in an ATM transmission system  
An ATM transmission system transmits cell-formatted data in an asynchronous transfer mode, and aims at conducting an online path route test in the system. If one path route only is established in...
Matches 151 - 200 out of 270 < 1 2 3 4 5 6 >