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5712853 |
Apparatus and method for transferring operation, administration and management cells across and ATM data frame user network interface
A method and switch appratus for transporting an ATM layer OAM cell across a FUNI are disclosed. The method broadly includes generating a DXI (FUNI) frame from the ATM layer OAM cell by using...
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5712897 |
Fault detection in broadband cable systems
A fault detection system for a broadband network having a central switch for switched telecommunications connections among subscribers each provided with subscriber interface equipment. The...
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5687214 |
Method and apparatus for remote maintenance procedures
A programmable multi-function telecommunications device starts a timer when it detects a first signaling signal, such as a test signal, on a communication channel. If a second signaling signal,...
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5680391 |
Arrangement for testing telephone subscriber line circuit via B-ISDN channel linking central office test system and metallic channel unit installed in digital loop carrier remote terminal
A subscriber line circuit test and conditioning arrangement for use with a non-metallic (fiber optic) digital communication path-based digital communication network employs a single (basic rate...
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5675508 |
Transcoder test method
A method of testing a speech transcoder is provided for testing a speech transcoder including at least a speech decoder module connected to a PCM format conversion module where the method of...
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5675579 |
Method for verifying responses to messages using a barrier message
A processing system includes a number of communicatively interconnected system elements structured to send and receive data in the form of message packets. Message packets sent to a destination...
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5654751 |
Testing jig and method of testing video using testing jig
A testing jig is comprised of a circuit board which replaces and emulates the data transfer between a network interface module and a decoder engine of a settop box in a digital network. The testing...
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5649109 |
Apparatus and method for maintaining forwarding information in a bridge or router using multiple free queues having associated free space sizes
A forwarding information management system for a bridge or router is disclosed, including a method and apparatus for maintaining forwarding entries within a forwarding table. The forwarding table...
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5648965 |
Method and apparatus for dynamic distributed packet tracing and analysis
A packet filter can be programmed by a remote controller to detect packets meeting a particular criterion and to report detection of these packets to the controller. The reports from the packet...
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5646956 |
System and method for estimating top contributors
A system and method for estimating top contributing stations of a local area network. A traffic analyzer of the present invention determines the top N stations producing and receiving traffic on a...
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5640512 |
Maintenance method and apparatus for providing a high-integrity, unidirectional, standardized ATM/SONET/DS3 transport signal link for a video distribution network
A high-integrity video distribution signal is provided unidirectionally from one network node to another network node according to a standard digital communications format (ATM; SONET; DS3) that...
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5636202 |
Test system for detecting ISDN NT1-U interfaces
The invention is a test method for testing ISDN interfaces from a remote location. The test method of the invention applies predetermined energy signals to the tip and ring leads of the customer...
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5633537 |
Multiplex transmission apparatus
When it is detected that the state of an electrical component connected to a communication node has not changed in the OFF state of an ignition key switch, it is determined that a vehicle equipped...
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5629931 |
Information transmission system
In an information transmission system, in particular a telephone system, the subscribers can be connected to a dial exchange over a line. At the dial exchange end and at the subscriber end of the...
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5627766 |
Performance and status monitoring in a computer network
Provided is a method and a system for computer network monitoring, implemented in a network in which processes communicate using message queuing. Each node of the network has a network management...
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5627834 |
Code division multiple access (CDMA) automatic call simulator
An automatic call simulator for simulating call processing capacity and performance between a base station and a mobile station of a CDMA mobile communication system is disclosed. A mobile station...
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5623480 |
System and method for accessing embedded channels
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 substrate channels in a DS3...
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5621720 |
Multichannel alignment system and method
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....
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5619489 |
Hand-held telecommunication tester
A graphically configurable method and device for testing high-frequency (DS0, DS1, DS3, and SONET) communication networks is disclosed. The foregoing is accomplished by a microprocessor controlled...
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5619532 |
Digital communication system
A digital communication system includes a first station, a second station and a network therebetween. The first station includes a clock selecting device for selecting one clock from a plurality of...
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5619490 |
Line set-up system
Line set-up detection circuit 22-1 detects N successive conformities in line information Sa from a network side line terminating set 1 and a signal Sb representing the result of detecting N...
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5617420 |
Hierarchical connection method, apparatus, and protocol
A protocol and associated circuitry operable for efficiently extending serial bus capability into multi-level system environments is disclosed. The protocol is designed to coexist and be fully...
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5615225 |
Remote measurement unit containing integrated line measurement and conditioning functionality for performing remotely commanded testing and conditioning of telephone line circuits
A processor-controlled integrated telephone line measurement and conditioning apparatus installable at a remote site provides a multiplicity of measurement and conditioning functions that are...
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5608733 |
ATM inverse multiplexing
In ATM networks, digital data in ATM cells are sent to a destination node over more than one transmission link in round robin fashion. This is called inverse multiplexing. At connection start-up,...
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5604728 |
Method for testing a transceiver, and base station of a time-divisional radicommunication system
A method for testing a transceiver unit of a time-divisional radiocommunication system includes assigning at least two free time slots for use, selected in such a manner that when the transmitter...
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5602826 |
Test system in an ATM system
A test system exactly checks the integrity of data in an ATM system, and generates a test cell of a desired band. In the first aspect of the system in which data stored in an ATM cell are...
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5596568 |
Apparatus for protecting a telecommunications network from false alarm conditions due to T1 line signal interruption
An apparatus continuously monitors the T1 output signal from a customer telecommunications equipment to a telecommunications network and provides a substitute input signal to the network whenever...
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5586111 |
In-line test switch for communications network
A communications network wherein the individual communication lines extend to peripheral user devices from a central hub. A test switch is interposed in the communication lines in the vicinity of...
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5570373 |
Method and apparatus for testing a radio in a base station without using a radio test unit
Testing of the operation of a radio in a base station of a wireless communication network may be achieved without removing the radio from service and without utilizing a separate test radio. Data...
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5544166 |
Electrical circuit arrangement having at least two local transmitting units for receiving and coding local measuring signals and for transmitting the coded measuring signals to a central unit
The present invention relates to an electrical circuit arrangement having at least two local transmitting units (2) for receiving and coding local measuring signals and for transmitting the coded...
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5537099 |
Receiving port security in a network concentrator
A method and apparatus for preventing intrusive access to a network. The method and apparatus are implemented in a network having a star topology. Utilizing a network management module of a network...
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5506709 |
Electro-optical communication station with built-in test means
A station-to-station communication system with a built-in testing arrangement in at least one of the stations. The testing arrangement includes a transmitter/receiver pair with associated...
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5506832 |
Remote confidence testing for computer-based conferencing system
A conferencing server accepts a conferencing session call from a conferencing node over a communications link. The conferencing server receives a message from the conferencing node requesting...
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5504779 |
Redundancy modem
A communication system providing for the duplication of data and information transmission between programmable controllers is disclosed. A modem is provided for each programmable controller and...
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5504736 |
Non-invasive link monitor
A non-invasive directional coupler (51) comprising a voltage probe (300) and a current probe (301) is used to detect and separate from each other digital pulses (quats) being transmitted in...
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5499338 |
Bus system having a system bus, an internal bus with functional units coupled therebetween and a logic unit for use in such system
A bus system has a main bus and an internal bus. The main bus is coupled to a number of driver units which drive data onto the main bus and to receiver units which respond to that data and provide...
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5477529 |
ISDN signal transmission performance monitoring
During ISDN signal transmission from a network trunk line (21) to an access line (18), a word (202) provided from the network trunk line is broken into two bytes including a data byte (205) and a...
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5475696 |
Remote alarm transfer method and system
An asynchronous transfer mode (ATM) cross-connect unit is used in an ATM communication system which includes at least two communication stations which may be coupled via a plurality of ATM...
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5475709 |
Adjacent and alternate channels power measurement apparatus
A signal processing unit selects signal components included in the frequency bands of respective channels from a burst signal input from a terminal, and outputs the selected signal components to a...
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5473596 |
Method and system for monitoring telecommunication network element alarms
A method of monitoring DS-0 alarm signals generated by telecommunication network elements, where the network elements include multiple network processing circuits connected to DS-1 facilities. The...
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5471399 |
Network management system and network status display method
In a network management system, information items respectively of connection relationships, containment relationships, and display priority of a plurality of managed object instances (resources)...
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5463317 |
Shield integrity monitor
An apparatus which can non-intrusively verify the integrity of shielding on electrical wiring. The method utilizes the natural resonance of the voltage transfer function of the shielded wire. The...
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5459772 |
External apparatus for monitoring a communication system
An external monitoring system operating for a communication system comprising a common channel signaling unit for separating a message communication function from a communication function and for...
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5453989 |
Subscriber digital transmission system
A subscriber digital transmission system has a central office terminal and a remote terminal coupled to the central office terminal by a digital line, the remote terminal accommodating a plurality...
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5440565 |
Test method and apparatus capable of testing reception of a desired cell through a virtual path
In a test method and apparatus for testing a virtual path in an asynchronous transfer mode system, a sequence number is included in an operation administrating monitoring (OAM) cell to specify the...
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5438528 |
Method and apparatus for testing an interactive network board in a local area network (LAN).
Method and apparatus for testing an interactive network board having a local area network interface, a Small Computer System Interface, and a test interface comprises supplying power to the...
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5434846 |
Process and apparatus for supervision and/or testing of an ATM-type telecommunications network
A process for monitoring a network which conforms to an Asynchronous Transfer Mode process standard including reading conveyed cells at a point (P) in the network (R), performing a preprocessing...
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5430708 |
Control channel terminating interface and its testing device for sending and receiving signal
A system includes private lines for carrying respective signals which each have at least one D channel for control information, and plural B channels for data. The system also includes a...
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5430709 |
Network monitoring method and apparatus
A network monitoring method and apparatus (61) is disclosed for monitoring communication connections temporarily established over a network (60) between respective pairs of entities for passing...
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5425052 |
High impedance directional signal separator for extracting and separating respective signalling components of a wireline full-duplex digital data link
A wireline bridge tap device and an associated signal processing mechanism are capable of successfully extracting and recovering the respective signalling components of a full-duplex wireline...
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