Programmable automatic call-thru set

Details Programmable automatic call-thru set Programmable automatic call-thru set

1988-12-22

1990-06-26

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

With blocking of normal usage

379 10, 379 14, 379 18, 370 14, H04J 116, H04M 332

Patent

active

049378503

ABSTRACT:
The present invention provides a test set which checks the communication line from a central office to a telephone responder which has a predetermined telephone number and which generates an output signal consisting of a predetermined sequence of signals. The checking is performed from a central testing station from where an operator inputs a test signal which identifies the telephone number of the test set located in the central office from which the test is to be made. Once the connection is established, the telephone number of the responder to be called is transmitted. The test set includes a signal detector which identifies an input signal. The signal detector is interfaced to the responder transmission medium such that the signal detector receives responder output signal as an input signal. The test set further includes a memory which includes the correct signal which should be received from the responder with called telephone number, and a processor. The processor is interfaced to the memory and is coupled to receive the identification signal and the test signal. The processor includes a program which instructs the processor to access the correct signal which should be received and compare the identification signal to the correct signal. The processor then generates a result signal which indicates whether the correct signal was received from the responder with the telephone number which was dialed.

REFERENCES:
patent: 4566093 (1986-01-01), Diaz

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