Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CSF Compagnie Generale de Telegraphie sans Fil SAfiledCriticalCSF Compagnie Generale de Telegraphie sans Fil SA
Priority to FR7613123ApriorityCriticalpatent/FR2350753A1/fr
Priority to ES458361Aprioritypatent/ES458361A1/es
Publication of FR2350753A1publicationCriticalpatent/FR2350753A1/fr
Application grantedgrantedCritical
Publication of FR2350753B1publicationCriticalpatent/FR2350753B1/fr
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
H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges
(AREA)
Devices For Supply Of Signal Current
(AREA)
FR7613123A1976-05-031976-05-03Generateur de frequences
GrantedFR2350753A1
(fr)