In an administration system for a public switched telephone network, a service analysis system is provided for proactively analyzing the working status of customer network facilities including a communication line in a communication cable associated with a customer The service analysis system includes an automatic line insulation test (ALIT) system testing the communication line in the communication cable associated with the customer producing trouble indicators indicating a potentially defective communication line, and a mechanized loop testing (MLT) system testing groups prioritized for the communication line The service analysis system also includes a data processor filtering the trouble indicators received from the ALIT system from predetermined communication services associated with the communication line that provide potentially false trouble indicators producing valid trouble indicators, and generating a list of the valid trouble indicators to be considered when determining whether the communication line is potentially defective The data processor generates a report to be used for examining the potentially defective communication line using the prioritized groups

System for proactively maintaining telephone network facilities in a public switched telephone network

In an administration system for a public switched telephone network, a method of provisioning and maintaining the working status of customer network facilities is provided. The method includes the steps of receiving a service request from a customer at a living unit requesting service, and determining whether the service request from the living unit is eligible for processing by the adjunct processor. When the service request is eligible, the method automatically provisions customer equipment to execute the service request based upon information including customer identification data and customer facilities. The information is generally maintained without altering the customer facilities when a subsequent disconnect request is received from the customer. The method also includes one or more of receiving a customer request, retrieving related customer profile information, obtaining a description of the customer trouble and entering a trouble type associated therewith, building a trouble report, testing the communication line and generating test results. The method also includes the steps of grouping related open work requests and proactively determined troubles with the trouble report based on grouping rules, and building a work load for a technician.

Combination system for provisioning and maintaining telephone network facilities in a public switched telephone network

A system for performing broadband differential time domain measurement on a subscriber loop. The system comprises a waveform generator coupled to a sampling head. The sampling head includes positive and negative pulse generators each coupled to one of the lines of the subscriber loop. The subscriber lines are in turn also coupled to two inputs of a differential amplifier, whose output is connected to an oscilloscope or other detector.

System and circuitry for measuring echoes on subscriber loops

A loop back test system and method for providing local fault detection within the core or macrocell of an integrated I/O interface device on an integrated circuit is disclosed. The system and method of this invention is suitable for use in any I/O interface having both a transmitter and a receiver section. The loop back of input test data from the transmitters output directly to the receiver's input permits fault detection within the core of an integrated I/O interface. By illustration, in a serializer/deserializer I/O, the loop back of serialized, alignment pattern encoded parallel data from the output stage of the I/O transmitter to the receiver's input stage permits identifying faults occurring within the integrated I/O transceiver macrocell. The loop back test system and method of this invention permits fault isolation of within the boundaries of the I/O core and independent of external logic or testers.

Loop-back test system and method

A game system includes a plurality of game machines each of which has an LCD. A game world in which a plurality of characters individually operated by the plurality of game machines appear is displayed on a CRT as a common display and on the LCD as an individual display of each of players. Specifically, a game world having a fixed viewpoint capable of viewing the plurality of characters is displayed on the CRT, and a three-dimensional game world having a viewpoint with reference to one's character is displayed on the LCD. One of the CRT or one's LCD is changeably selected as an operation screen. When a direction instructing key is operated, a moving direction of one's character is determined with reference to the operation screen, and one's character is moved to the determined moving direction.

Game system displaying a game world on a common display and an individual display

A full duplex digital transmission, high-capacity digital, facility loop-back test, diagnostics and maintenance system having a digital transmission facility, transmission medium, and at least one microprocessor-based, full duplex facility loop-back diagnostics interface is located at predetermined end-user locations within the system. The system is capable of initiating a facility loop-back test and predetermined diagnostics for a predetermined digital transmission span and customer premises equipment at the location of the network interface for a specified end-user. The facility loop-back diagnostics interface has a performance monitoring mode of operation and a maintenance facility loop-back mode of operation. The diagnostics interface can be activated from a remote location and is compatible with and supports a particular protocol, specifically LAP-B protocol. The diagnostics interface has integral performance monitoring capabilities for nonintrusive multiple diagnostics testing and on-line monitoring of multiple predetermined performance characteristics for associated DS1 communications channels, or a specified DS1 communications channel, and customer premises equipment at the network interface. The microprocessor of the performance monitoring unit for the facility loop-back diagnostics interface is synchronized with an internal clock that is driven by conventional power. There is also a long-life battery for preventing historical performance data from being corrupted during a power loss. When the diagnostics interface is in the performance monitoring mode of operation, historical performance data pertaining to predetermined performance characteristics and criteria can be retrieved by utilizing the extended superframe, or superframe, embedded operations channel.

Arthur J. Varga

Papers

Full duplex digital transmission facility loop-back test, diagnostics and maintenance system