ES440034A1 - Improvements in telephone systems and systems with one or more urban links to choice, and interior telephone communications with secret between various extensions (Machine-translation by Google Translate, not legally binding) - Google Patents

Improvements in telephone systems and systems with one or more urban links to choice, and interior telephone communications with secret between various extensions (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES440034A1
ES440034A1 ES0440034A ES440034A ES440034A1 ES 440034 A1 ES440034 A1 ES 440034A1 ES 0440034 A ES0440034 A ES 0440034A ES 440034 A ES440034 A ES 440034A ES 440034 A1 ES440034 A1 ES 440034A1
Authority
ES
Spain
Prior art keywords
links
extensions
systems
telephone
urban
Prior art date
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.)
Expired
Application number
ES0440034A
Other languages
Spanish (es)
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.)
Telefonia Y Electrica SA
Original Assignee
Telefonia Y 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 Telefonia Y Electrica SA filed Critical Telefonia Y Electrica SA
Priority to ES0440034A priority Critical patent/ES440034A1/en
Publication of ES440034A1 publication Critical patent/ES440034A1/en
Expired legal-status Critical Current

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  • Telephone Set Structure (AREA)

Abstract

Telephone system to obtain between a certain number of telephone devices (extensions) telephone communications with secret between them and communications through urban links or with private utomatic centralitas. We refer to the system called stai 4/10/5 (4 links, 10 extensions and 5 local conferences simultaneous as maximum). On the front panel of the device, the 4 push buttons are located in the urban links, the marker disk is on the right and the 10 buttons corresponding to the interior links in the bottom. An internal communication is established, the push-buttons corresponding to the 2 speaking extensions are turned on at all extensions, all the appliances are turned on and the conversation can not be heard from any extension. The power supply for the conferences between extensions and the luminous signaling (based on led on the push buttons) is made in continuous current. (Machine-translation by Google Translate, not legally binding)
ES0440034A 1975-08-05 1975-08-05 Improvements in telephone systems and systems with one or more urban links to choice, and interior telephone communications with secret between various extensions (Machine-translation by Google Translate, not legally binding) Expired ES440034A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES0440034A ES440034A1 (en) 1975-08-05 1975-08-05 Improvements in telephone systems and systems with one or more urban links to choice, and interior telephone communications with secret between various extensions (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES0440034A ES440034A1 (en) 1975-08-05 1975-08-05 Improvements in telephone systems and systems with one or more urban links to choice, and interior telephone communications with secret between various extensions (Machine-translation by Google Translate, not legally binding)

Publications (1)

Publication Number Publication Date
ES440034A1 true ES440034A1 (en) 1977-03-01

Family

ID=59033625

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0440034A Expired ES440034A1 (en) 1975-08-05 1975-08-05 Improvements in telephone systems and systems with one or more urban links to choice, and interior telephone communications with secret between various extensions (Machine-translation by Google Translate, not legally binding)

Country Status (1)

Country Link
ES (1) ES440034A1 (en)

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