Apparatus and method for performing and controlling testing of electrical equipment

• US 5,511,108 A
• Filed: 12/04/1992
• Issued: 04/23/1996
• Est. Priority Date: 05/31/1991
• Status: Expired due to Term

• Current Assignee: Viavi Solutions, Inc. (Lumentum Holdings Inc.)
• Original Assignee: Itronix Corp. (General Dynamics Corporation)
• Inventors: Anselmo, James, Upchurch, Daren, Erler, William, Severt, David, Siegner, George
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): Shankar, Vijay
• Application Number:
  US07/987,480
• Time in Patent Office: 1,236 Days
• Field of Search: 379/1, 379/11, 379/18, 379/21, 379/22, 379/29
• US Class Current: 379/21
• CPC Class Codes: G01R 15/12 Circuits for multi-testers , i.e. multimeters, e.g. for measuring voltage, current, or impedance at will
• CPC Class Codes: H04M 1/24 Arrangements for testing
• CPC Class Codes: H04M 3/30 for subscriber's lines , for the local loop

Abstract

An administrative computer and testing apparatus device is provided. The administrative computer is coupled to the testing apparatus so that the test data can be correlated with administrative information such as the location of the equipment tested. The testing apparatus can be configured as a slice for insertion between upper and lower portions of the administrative computer. The administrative computer can control the testing apparatus to provide testing in accordance with predefined test procedures. The administrative computer is user-programmable to permit user-defined test procedures to be established. Test data, e.g. test data correlated with the location information, can be communicated to a remote computer for further processing or analysis. Communication can be implemented through a modem, which can be a land-line modem or an RF or other wireless modem.

Claims

1. Apparatus for performing and controlling testing of electrical equipment, comprising:

a computer configured in matable, separable first and second cases with at least a first wire coupling said first and second cases for conveying at least a first electrical signal, said first and second cases being matable to provide a single rigid computer device;

a test circuit housing, containing circuitry for testing electrical equipment, said test circuit housing being selectively and removably positioned between and separating said first and second cases, said test circuit housing being mated to said first and second cases to provide a single rigid device; and

at least a first wire coupling said circuitry for testing with said computer for conveying at least a second electrical signal for control of said circuitry for testing;

said computer being functional even if said test circuit housing is removed.

2. Apparatus, as claimed in claim 1, wherein said circuitry for testing comprises circuitry for testing a telephone subscriber loop, and includes a plurality of contacts selectively coupled to the subscriber loop, a plurality of selectable signal conditioning circuits, selectively coupled to selected contacts to provide a conditioned signal, and an instrumentation processor including instrumentation circuits and a voltage measuring device selectively coupled to the conditioned signal, and providing data representative of an electrical parameter measurement.

3. Apparatus, as claimed in claim 1 wherein said electrical equipment is telephone equipment and wherein said circuitry for testing including at least a first tone generator for transmitting a tone to said telephone equipment.

4. Apparatus, as claimed in claim 1, further comprising an RF modem, coupled to said computer, for transmitting data from and receiving data in said computer without the need to convey said data over a physical medium during the full pathway of said data.

5. Apparatus for performing and controlling testing of electrical equipment, comprising:

matable, separable first and second cases;

a computer configured in the first and second cases, the computer including a power supply housed in said second case, and a central processing unit housed in said first case;

first means coupling said first and second cases for conveying at least a first electrical signal;

second means for attaching said first and second cases to provide a single rigid computer device, said second means including interconnecting tabs and slots in said first and second cases;

a housing selectively and removably positioned between and separating said first and second cases;

third means for testing electrical equipment, said third means being disposed in said housing;

fourth means for attaching said housing to said first and second cases to provide a single rigid device, said fourth means including interconnecting tabs and slots in said housing which are located and configured to engage said tabs and slots in said first and second cases; and

fifth means, coupling said third means with said computer for conveying at least a second electrical signal for control of said third means for testing.

6. Apparatus for performing and controlling testing of a telephone subscriber loop and communicating results, comprising:

a computer;

a test circuit housing;

circuitry, supported in said housing, for testing a telephone subscriber loop and including a plurality of contacts selectively coupled to the subscriber loop, a plurality of selectable signal conditioning circuits, selectively coupled to selected contacts to provide a conditioned signal, and an instrumentation processor including instrumentation circuits and a voltage measuring device selectively coupled to the conditioned signal and providing data representative of an electrical parameter measurement, said circuitry being coupled to said computer for conveying testing results to said computer; and

an RF modem coupled to said computer, for transmitting said testing results from said computer along a data pathway to a remote computer without the need to convey said testing results over a physical medium during the full extent of said data pathway.

7. Apparatus for performing and controlling testing of a telephone subscriber loop and communicating results, comprising:

a computer;

a test circuit housing;

circuitry, under the control of the computer and supported in said housing, for testing a telephone subscriber loop and including first and second test leads for connecting said circuitry to at least tip and ring lines of the subscriber loop, a signal conditioning circuit, selectively coupled to selected contacts to provide a conditioned signal, and an instrumentation processor including instrumentation circuits and a voltage measuring device selectively coupled to the conditioned signal and providing data representative of an electrical parameter measurement, said circuitry being coupled to said computer for conveying testing results to said computer;

a first fuse coupled in-line with said first test lead; and

a second fuse coupled in-line with said second test lead.

8. Apparatus, as claimed in claim 7 wherein said first and second fuses are disposed in a fuse holder contained in said housing, said fuse holder also containing at least one spare fuse, said fuse holder configured to permit replacement of at least one of said first and second fuses with said at least one spare fuse by withdrawal, movement and reinsertion of said fuse holder.

9. Apparatus, as claimed in claim 8 wherein said fuse holder is configured to permit replacement wherein said movement includes rotation of said fuse holder.

10. Apparatus for permitting a user to obtain electrical test results relating to equipment which is to be tested comprising:

an administrative computer programmed to store and communicate information related to the location of the equipment which is to be tested;

a keyboard, coupled to the administrative computer, permitting user input to the administrative computer;

testing apparatus operable under control of the administrative computer, the testing apparatus configured to obtain data indicating values of a plurality of electrical parameters of the equipment which is to be tested;

a memory for storing information coupled to the testing apparatus;

data transfer apparatus coupled between the memory and the testing apparatus for transferring information based on the data into memory, in the absence of manually inputting the information using the keyboard;

an RF modem, coupled to said administrative computer, for transmitting data from and receiving data in said administrative computer without the need to convey said data over a physical medium during the full pathway of said data.

11. Apparatus for providing results of electrical tests correlated with location information, comprising:

an administrative computer which includes

a central processing unit;

a memory, coupled to the central processing unit;

a display, coupled to the central processing unit, for displaying information relating to the location of equipment to be tested;

a keyboard, coupled to the central processing unit, for receiving user commands to control the display;

a serial port, coupled to the central processing unit, for transmitting serial data signals;

a power supply means; and

RF modem means, for providing serial communication from the administrative computer;

an instrumentation processor, coupled to the serial port using an optical interface to permit communication between the administrative computer and the instrumentation processor;

a read-only memory coupled to the instrumentation processor for storing program information for the instrumentation processor;

a random-access memory, coupled to the instrumentation processor, for temporary storage of data processed by the instrumentation processor;

an I/O register coupled to the instrumentation processor;

signal processors, having inputs and outputs, which include

a plurality of selectable signal filters;

a plurality of selectable terminator resistances; and

tip, ring and ground test leads;

a matrix of latchable, controllable relay switches for selectably connecting the test leads to the inputs of the signal processors;

a plurality of relay drivers coupled to the matrix of relay switches and to the I/O register to permit the instrumentation processor to control the controllable relay switches in response to serial data signals received over the serial port from the administrative computer;

an input protection network for coupling the test leads to the matrix of relay switches;

controllable power control means including transformer means for coupling the power supply to the instrumentation processor and to the matrix of relay switches;

means for coupling the RF modem means to a telephone line;

a controllable-gain amplifier, coupled to the RF modem means, and a speaker, coupled to the controllable-gain amplifier, for reproducing audio signals provided over the RF modem means;

control logic, coupled to the administrative computer, for transmitting a first control signal to the controllable-gain amplifier and for transmitting a second control signal from the administrative computer to the controllable power control; and

an isolation transformer coupling the RF modem means to the matrix of relay switches.

12. Apparatus, as claimed in claim 11, wherein said display has both a character display capability and a graphics display capability.

13. In an administrative computer, the computer including

a central processing unit;

a memory, coupled to the central processing unit;

a display, coupled to the central processing unit, for displaying information relating to the location of equipment to be tested;

a keyboard, coupled to the central processing unit, for receiving user commands to control the display;

said administrative computer disposed in upper and lower matable, separable upper and lower cases;

a method for performing testing on the equipment to be tested, the method comprising;

providing a means for measuring electrical parameters of said equipment to be tested;

separating said upper and lower cases of said administrative computer;

inserting said means for measuring electrical parameters between said upper and lower cases;

electrically coupling said means for measuring electrical parameters to said administrative computer along an electrical pathway;

attaching said means for measuring electrical parameters to said upper and lower cases to provide a single substantially rigid device;

providing control signals from the administrative computer to the means for measuring electrical parameters;

receiving signals from the equipment to be tested;

selectively storing information related to the signals received from the equipment to be tested in the memory of the administrative computer;

reading, from the memory, the information related to the signals received from the equipment;

correlating the information read from the memory with the information relating to the location of the equipment to be tested.

14. A method, as claimed in claim 13, further comprising:

providing a test lead, coupled to said means for measuring electrical parameters;

providing a fuse drawer holding at least first and second fuses, said fuse drawer configured to be removably insertable into said first means to position said first fuse in a location to engage at least said first fuse in-line with said test lead;

withdrawing said fuse drawer;

rotating said fuse drawer to align said second fuse with said location; and

inserting said fuse drawer into said first means to engage said second fuse in-line with said test lead.

15. A method, as claimed in claim 13, further comprising:

displaying a plurality of values of an electrical parameter, as the electrical parameters of the equipment to be tested changes, according to a pre-determined display format.

16. A method, as claimed in claim 15, wherein the pre-determined format includes a line-graph of the electrical parameter having time as one axis of the line graph.

17. A method of communicating between a central computer and a field service computer, comprising:

providing a field service computer programmed to store and communicate information related to the location of equipment which is to be tested;

providing a keyboard, coupled to the administrative computer, permitting user input to the administrative computer;

providing a testing apparatus operable under control of the administrative computer, the testing apparatus configured to test a field device needing service and to obtain data indicating values of a plurality of electrical parameters of the equipment which is to be tested;

providing a memory for storing information coupled to the testing apparatus;

providing a data transfer apparatus coupled between the memory and the testing apparatus for transferring information into the memory from the testing apparatus, in the absence of manually inputting the information using the keyboard;

transmitting first administrative information from said central computer to said field service computer over a radio data link, said first administrative information including at least information relating to the location of a field device needing service;

testing said field device with said testing apparatus and storing test data in said field service computer; and

transmitting second administrative information from said field service computer to said central computer over a radio data link, said second administrative information including at least information relating to servicing of said field device.

18. A method, as claimed in claim 17, wherein said second administrative information includes at least a portion of said test data.

19. A method, as claimed in claim 17, wherein said step of transmitting second administrative information includes using an RF modem, coupled to said field service computer, to transmit said second administrative information.