Impulse signal convertor

Details Impulse signal convertor Impulse signal convertor

1995-05-12

1997-06-10

Zele, Krista M.

Telephonic communications

Centralized switching system

Switching controlled in response to called station...

379353, 379418, H04M 126

Patent

active

056384351

ABSTRACT:
An impulse convertor for converting a received telephone impulse dialing signal into a restored dialing signal has a limiter-amplifier, a signal detector, an output formatter, and a controller. The limiter-amplifier receives the impulse dialing signal from an interface b to a communication system such as a public switched telephone network or a cellular network, limits the amplitude range of the received impulse dialing signal, and compensates for attenuation of the received impulse dialing signal. The signal detector analyzes successive portions of an output signal generated by the limiter-amplifier and determines dialed digits represented by the received impulse dialing signal. The output formatter converts the dialed digits determined by the signal detector into the restored dialing signal that is provided to a device C such as a PABX. The controller coordinates operation of the limiter-amplifier, signal detector, and output formatter.

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Patent Abstracts of Japan vol. 14, No. 9 (E-870), Jan. 10, 1989 & JP, A, 01 255393 (Eiichi Yamazaki), Oct. 12, 1989.
P. Horowitz et al., The Art of Electronics, 2d ed., pp. 580-582, 669, Cambridge University Press (1989).

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