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.)
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Nokia Spain SA
Original Assignee
Alcatel Espana SA
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Filing date
Publication date
Application filed by Alcatel Espana SAfiledCriticalAlcatel Espana SA
Publication of ES182193A1publicationCriticalpatent/ES182193A1/en
Sub-Exchange Stations And Push- Button Telephones
(AREA)
Abstract
Mejoras en sistemas telefónicos, una pluralidad de centrales, líneas uniendo a los aparatos de abonado y a las posiciones de operador a dichas centrales, enlaces entre centrales, medios para establecer conexión de conversación a dos hilos, entre una línea que llama en una central y una línea llamada en otra central por un enlace entre centrales como mínimo, suministros de potencial en dichas centrales y medios gobernados por una línea llamada sobre dichos conductores de conversación para retener la conexión originada desde la línea que llama.Improvements in telephone systems, a plurality of exchanges, lines linking subscriber apparatuses and operator positions to said exchanges, links between exchanges, means to establish a two-wire conversation connection, between a line calling in a central and a line called in another exchange by a link between at least exchanges, potential supplies in said exchanges and means governed by a called line on said conversation conductors to retain the connection originated from the calling line.
ES0182193A1941-07-211948-02-09
IMPROVEMENTS IN TELEPHONE SYSTEMS
ExpiredES182193A1
(en)
Circuit provision for telecommunication link installations, particularly for telephone installations, with coupling fields. (Machine-translation by Google Translate, not legally binding)