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
Links
Landscapes
- 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)
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) |
-
1975
- 1975-08-05 ES ES0440034A patent/ES440034A1/en not_active Expired
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