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AssigneeCommunications Test Design, Inc.
InventorsDonald F. Parsons, Gerald J. Parsons, Brian D. Greenwald, Elizabeth A. Parsons
Estimating the term…
Multiple electrical path assembly as in a telephone grid, is rapidly and accurately checked by grounding one end of all but one of the path conductors, applying a test signal to that one end, detecting the presence or absence of signal on both ends of all conductors, and repeating the procedure for all the conductors, as with a computer containing a microprocessor. Where the conductors are individually switched, they can all be switched on beforehand. Detectors can also be connected to the conductors during the testing, to detect unusually high voltages, and testing can be interrupted when such voltages are detected. Switch actuation can be separately tested by detecting the passage of current that is used to actuate them.
A method of testing a telephone switching grid having a multiplicity of incoming telephone connectors, a multiplicity of outgoing telephone connectors, and switch selector means connected to establish individual interconnections between individual incoming connectors and individual outgoing connectors, in which method the switch selector means is actuated to establish in rapid sequence individual interconnections for all the incoming or outgoing connectors, grounding one end of all but one of the connectors, applying a signal to said one ungrounded connector end, and detecting the presence or absence of signal on both ends of all connectors.
A method of testing a telephone switching grid having a multiplicity of incoming telephone connectors, a multiplicity of outgoing telephone connectors, a multiplicity of interconnection links, a first set of electrically actuated switches greater in number than the number of incoming connectors for selectively connecting individual incoming connectors to individual links, and a second set of electrically actuated switches greater in number than the number of outgoing connectors for selectively connecting individual outgoing connectors to individual links, in which method different switch-actuating currents for the respective switches are momentarily generated in rapid sequence, a separate record is made of the actuating current for each switch, and additional records are made of the continuity through the switches subjected to the actuating currents, to show the operating action of the switches and to also show that all pairs of switches have been subjected to the actuating current.
An apparatus for rapidly testing a telephone switching grid having a multiplicity of incoming telephone connectors, a multiplicity of outgoing telephone connectors, and electric pulse controlled switch selector means connected to establish individual interconnections between individual incoming connectors and individual outgoing connectors, said apparatus having switch control means connected to a microprocessor programmed to rapidly actuate the switch selector means for successively interconnecting the individual connections for all incoming or outgoing connectors, ground one end of all but one of the connectors, apply a signal to said one ungrounded connector end, and check for the presence or absence of signal on both ends of all connectors.
A method of automatically testing at high speed the switching and continuity of an assembly of separately switched separate circuits, in which method all the circuits are first switched to conductive condition, and then the continuity of the circuits is tested by individually applying a voltage to one circuit after another with essentially simultaneous measurement at each such voltage application of the voltages on all the circuits.
A method for checking a high-speed automatic circuit tester that automatically tests a large number of circuits, which method is characterized by providing a diagnostic board having a correspondingly large number of dummy circuits in predetermined condition, and using the circuit tester to test the circuits on the diagnostic board.
A method for testing a telephone line grid containing grid circuits and a number of start circuits some of which start circuits may be loop start and other ground start, which method is characterized by the steps of:
A test circuit for testing telephone start circuits, the test circuit having input connectors for connection to the tip input and ring input, respectively, of a start circuit, a first switchable link and a current detector connected in series between the input connectors, and a second switchable link connected between the ring input connector and a telephone circuit ground.
An apparatus for rapidly testing a telephone switching grid having a multiplicity of incoming telephone connectors, a multiplicity of outgoing telephone connectors, a multiplicity of interconnection links, a first set of electrically actuated switches greater in number than the number of incoming connectors for selectively connecting individual incoming connectors to individual links, and a second set of electrically actuated switches greater in number than the number of outgoing connectors for selectively connecting individual outgoing connectors to individual links, the apparatus having microprocessor-operated switch pulsing means connected to sequentially momentarily close all the switches of the first and second sets in pairs for establishing individual interconnections between individual incoming connectors and individual outgoing connectors, the microprocessor-operated means being further connected to memory means to make an individual switch record of the sequence of switch pulsings and to also make a record of the condition of each of the individual interconnections as they are switched on.
Dependencies are inferred from the claim text.