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Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04M—TELEPHONIC COMMUNICATION
H04M19/00—Current supply arrangements for telephone systems
H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Two-Way Televisions, Distribution Of Moving Picture Or The Like
(AREA)
Dispositif de detection de parasites en forme d'impulsion et dispositif de suppression de parasites en forme d'impulsion muni d'un dispositif de detection de parasites en forme d'impulsion