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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
Standard Electrica 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 Alcatel Espana SA, Standard Electrica SAfiledCriticalAlcatel Espana SA
Priority to ES277984ApriorityCriticalpatent/ES277984A3/en
Publication of ES277984A3publicationCriticalpatent/ES277984A3/en
An automatic electronic switching system, comprising a number of subscriber apparatuses, line circuits associated with each of said apparatuses, connecting device means comprising a number of circuits for connecting those of said subscriber apparatuses that call with those of said so-called subscriber apparatuses, means of marker devices operated in response to direct signals from said calling apparatuses to dial said calling line circuit and said so-called line circuit, means for transmitting pilot signals from said so-called dialing line circuit to said marked line circuit called and from said called marked line circuit to said marked line circuit which, through all the available ones of said circuits, calls selection means to progressively block a part of said available circuits while leaving circuits for said pilot signals through dic connection device, said progressive blocking only a selected circuit and means responsive to said selection of a circuit to completely switch said connection means to connect said apparatus calling said called device on said selected circuit. (Machine-translation by Google Translate, not legally binding)
ES277984A1962-06-051962-06-05Automatic electronic switch system (Machine-translation by Google Translate, not legally binding)
ExpiredES277984A3
(en)
Improvements introduced in the telephone circuits that allow the warning of calls in occupied appliances or in conversation (Machine-translation by Google Translate, not legally binding)