Constructive module of an electronic telecommunications...

Details Constructive module of an electronic telecommunications... Constructive module of an electronic telecommunications...

1998-08-05

2001-02-27

Nguyen, Vinh P. (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C324S073100, C324S1540PB

Reexamination Certificate

active

06194909

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to electronic telecommunications equipment and in particular, to a module for such equipment it concerns a constructive module for such an equipment, which module is The invention deals with a module which equipped with means for interfacing it with a testing and diagnosing system via pre-determined insertion or monitoring points in the module, which means can be mounted at least temporarily and in a non-invasive fashion onto the module itself. Such a constructive module is known from U.S. Pat. No. 5,252,914.
BACKGROUND OF THE INVENTION
A module is known from U.S. Pat. No. 5,252,914 which can be connected to such a system,
In electronic telecommunications equipment (e.g. switching exchanges) it is often necessary to check and test the behavior of the equipment or of parts thereof, both during the testing phase and during its regular operation. One of the tests carried out on the system consists in creating fault conditions and in monitoring and analyzing the response of the equipment. The fault condition is generally obtained by forcing some points of the equipment to a pre-set signal level, e.g. corresponding to logic 0 or logic 1, depending on the manufacturing technology employed for the logic circuits mounted on the module. Other tests may require injecting current noisew.
Hereinafter, the terms “actuation” (with no other specifications) or “signal insertions” shall be used to indicate both fault actuation and noise injection.
Tests need to be automated, and this requires that the equipment parts to be tested (hereinafter referred to as “modules”) may be associated, at least temporarily, with interfacing means which on the one hand are driven by a testing and diagnosing system sending the signal insertion commands in a programmed fashion, and which on the other hand transfer the responses of the modules to the testing and diagnosing system. During the tests it is necessary to obtain conditions exactly corresponding, from the electrical point of view, with those which may occur during equipment operation, the normal operation of the equipment must not be disturbed in the absence of signal insertion and, conversely, the insertion commands and the responses must not be altered by signals present in a module under test. Moreover, mounting the interface means on the module must not require modifications to the construction or design of the module.
In the above-mentioned prior art In U.S. Pat. No. 5,252,914 which concerns a transceiver on a circuit board with a series of modules, diagnosis is carried out by coupling test equipment to some pins of the permanent connectors of the circuit board and additional pressure pins placed so as to provide for connections with the input and output pins of the modules on the board. The diagnosis facilities are thus restricted to what can be tested by contacting these pins.
OBJECTS OF THE INVENTION
It is the object of the present invention to provide a module of electronic equipment for telecommunications which allows tests to be performed in such a way as to meet the aforesaid requirements, without placing particular constraints on the module design rules.
SUMMARY OF THE INVENTION
According to the invention actuation probes, driven by control signals provided by a testing and diagnosing system for the automatic and programmed insertion of test signals into the pre-determined insertion points of the module are provided. Monitoring probes to collect signals present in the module from the monitoring points and transfer such signals to the testing and diagnosing system. Shielded micro-coaxial cables, connected on the one side to the actuation and monitoring probes and on the other side to connectors provided on the module, are used for signal transfer between the connectors and the probes. Conditioning means, associated with the connectors for the cables intended to provide the control signals to the actuation probes, allow signal insertion into modules based on different technologies by using the same type of control signal provided by the testing and diagnosing system and to provide a galvanic isolation between the testing and diagnosing system and the modules under test.


REFERENCES:
patent: 4498196 (1985-02-01), Holoyda et al.
patent: 4646299 (1987-02-01), Schinabeck et al.
patent: 4731879 (1988-03-01), Sepp et al.
patent: 4810956 (1989-03-01), Hvezda et al.
patent: 5252914 (1993-10-01), Bobbit et al.
patent: 33 22 914 (1984-02-01), None
International Test Conferrence 1988 Proceedings, Washington, Sep. 1988, pp. 13-22, Sheng-Jen Tsai et al: “GaAs Driver and Sensor for a High Speed Test System”.

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