Telephonic communications – Centralized switching system – Switching controlled in response to called station...
Patent
1995-05-24
1997-08-19
Zele, Krista M.
Telephonic communications
Centralized switching system
Switching controlled in response to called station...
379386, 370526, H04M 100
Patent
active
056596065
ABSTRACT:
A circuit and method for detecting identification signals in a digital input signal (Rx) having signal parameter values which are provided to a signal memory (54). The values provided to the signal memory (54) are updated at a sampling frequency. The circuit includes a set of processing units (50) which are arranged so as to be freely programmable by a user. The signal memory (54) stores values of input signal (Rx) and output signals of the processing units. A programmation memory (56) stores at predetermined locations associated with the inputs of the processing units, the signal memory addresses associated with the signals that the user desires to connect to these inputs. A controller (64) sequentially reads the addresses stored in the programmation memory (56) and provides the values stored in the signal memory (54) corresponding to the read addresses to inputs of respective processing units in an order corresponding to the predetermined locations.
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Proceedings of the National Communications Forum, vol. 31, Oct. 10, 1977, Oak Brook, IL US pp. 267-272 R, Cano et al. "Implementation Of A Universal Receiver-Sender For Multifrequency Signalling".
Morris James H.
SGS-Thomson Microelectronics S.A.
Wolinsky Scott
Zele Krista M.
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