Multiplex communications – Diagnostic testing – Fault detection
Reexamination Certificate
1997-10-30
2001-04-03
Nguyen, Chau (Department: 2663)
Multiplex communications
Diagnostic testing
Fault detection
C370S248000, C370S251000, C370S395430
Reexamination Certificate
active
06212168
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a subscriber control module having a test apparatus which is suitable for testing internal routes in an Asynchronous Transfer Mode ATM exchange system, so that improved reliability and effective maintenance thereof are secured.
2. Description of the Conventional Art
For the use of test apparatus modules for Asynchronous Transfer Mode exchange system, there has been, conventionally, used different test apparatus modules for different rates subscribers. However, relatively bulky modules can be coupled thereto only from the external of the exchange system, without being installed inside ATM exchange system.
Thus, it is required to use the number of test apparatus modules corresponding to the subscribers with different rates, respectively, selected to be tested, and further such many modules are to be coupled from the external of the exchange system.
There occurs the problem in that internal routes in the exchange system cannot be tested under the control of a maintenance control module existing inside the system.
SUMMARY OF THE INVENTION
Therefore, the present invention aimed to solve the above-mentionend problem provides a subscriber control module having testing functions by which all internal routes in the exchange system under the control by maintenance control module inside the system can be tested through the use of subscriber switching network and connection switching network. A test apparatus of the present invention placed inside the exchange system can test ATM subscribers at individually different rates, configured in such a way to be identical with boards used in the exchange system so that the test apparatus can be installed inside the exchange system.
To achieve the object of the present invention, there is provided a subscriber control module comprising: cell multiplexing/demultiplexing means which is coupled to a subscriber switching network module through the connections between internal modules, multiplexes and transports cells into the subscriber switching network module, demultiplexes cells received through the subscriber switching network module and transports them depending upon the destinations; call-connecting control means coupled to the cell multiplexing/demultiplexing means and for receiving and tansporting the internal control cells, outputting warning messages of Off_Alm and Fun_Alm, and communication with a maintenance control module in a central exchange subsystem to control the call connections; test functioning means which analyzes the received control cells in response to the receipt of internal route testing commands through the control cells incoming from the call-connecting control means and generates and transports the test cells appropriate to the internal testing routes and which analyzes the test cells received through the internal routes, and by which the results under the internal control cell format are reported to the call-connecting control means, and which outputs the Off_Alm, Fun_Alm warning messages; and warning message collecting means which collects warning messages generated from the test functioning means, call-connecting control means and cell multiplexing/demultiplexing means, and also collects warning messages generated from respective modules in the local exchange subsystem, and by which the results under the internal message format are reported to the call-collecting control means.
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Kim Hae Geun
Kim Jin Tae
Lee Seung Han
So Woon Seob
Yang Sung Mo
Electronics and Telecommunications Research Institute
Hyun Soon-Dong
Jacobson Price Holman & Stern PLLC
Nguyen Chau
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