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IT1078731B - Telephone switching system with contacts for standard lines - has press button switches for relay coils and display giving line number - Google Patents

Telephone switching system with contacts for standard lines - has press button switches for relay coils and display giving line number

Info

Publication number
IT1078731B
IT1078731B IT5281775A IT5281775A IT1078731B IT 1078731 B IT1078731 B IT 1078731B IT 5281775 A IT5281775 A IT 5281775A IT 5281775 A IT5281775 A IT 5281775A IT 1078731 B IT1078731 B IT 1078731B
Authority
IT
Italy
Prior art keywords
contacts
switching system
line number
press button
button switches
Prior art date
Application number
IT5281775A
Other languages
Italian (it)
Original Assignee
Interconnect Planning Corp
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 Interconnect Planning Corp filed Critical Interconnect Planning Corp
Priority to IT5281775A priority Critical patent/IT1078731B/en
Application granted granted Critical
Publication of IT1078731B publication Critical patent/IT1078731B/en

Links

Landscapes

  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

A telephone extension is connected to a telephone line which is selected from a number of lines in order to establish communication with a second extension. This is performed by a switching system comprising a number of press buttons with contacts which operate relays to close a pair of contacts in the telephone lines. Each switch displays a number to indicate which telephone line is directly connected by generating a coded signal which is routed to the display. The push buttons have automatic return actions.
IT5281775A 1975-12-22 1975-12-22 Telephone switching system with contacts for standard lines - has press button switches for relay coils and display giving line number IT1078731B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT5281775A IT1078731B (en) 1975-12-22 1975-12-22 Telephone switching system with contacts for standard lines - has press button switches for relay coils and display giving line number

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5281775A IT1078731B (en) 1975-12-22 1975-12-22 Telephone switching system with contacts for standard lines - has press button switches for relay coils and display giving line number

Publications (1)

Publication Number Publication Date
IT1078731B true IT1078731B (en) 1985-05-08

Family

ID=11277698

Family Applications (1)

Application Number Title Priority Date Filing Date
IT5281775A IT1078731B (en) 1975-12-22 1975-12-22 Telephone switching system with contacts for standard lines - has press button switches for relay coils and display giving line number

Country Status (1)

Country Link
IT (1) IT1078731B (en)

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