CH286287A - Telephone installation. - Google Patents

Telephone installation.

Info

Publication number
CH286287A
CH286287A CH286287DA CH286287A CH 286287 A CH286287 A CH 286287A CH 286287D A CH286287D A CH 286287DA CH 286287 A CH286287 A CH 286287A
Authority
CH
Switzerland
Prior art keywords
telephone installation
telephone
installation
Prior art date
Application number
Other languages
French (fr)
Inventor
Incorporated Western E Company
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of CH286287A publication Critical patent/CH286287A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
CH286287D 1938-12-01 1947-08-08 Telephone installation. CH286287A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US243347A US2208765A (en) 1938-12-01 1938-12-01 Telephone system

Publications (1)

Publication Number Publication Date
CH286287A true CH286287A (en) 1952-10-15

Family

ID=22918388

Family Applications (2)

Application Number Title Priority Date Filing Date
CH276283D CH276283A (en) 1938-12-01 1947-08-08 Telephone installation.
CH286287D CH286287A (en) 1938-12-01 1947-08-08 Telephone installation.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CH276283D CH276283A (en) 1938-12-01 1947-08-08 Telephone installation.

Country Status (6)

Country Link
US (3) US2208765A (en)
BE (1) BE476596A (en)
CH (2) CH276283A (en)
FR (2) FR951758A (en)
GB (2) GB640033A (en)
NL (2) NL70515C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2586901A (en) * 1948-07-24 1952-02-26 Bell Telephone Labor Inc Two-way trunk circuit arranged for dial-back operations
US2691068A (en) * 1950-12-11 1954-10-05 Stromberg Carlson Co Two-way carrier type trunk circuit
US2715158A (en) * 1951-10-31 1955-08-09 Stromberg Carlson Co Signaling system
US2708692A (en) * 1952-06-14 1955-05-17 Automatic Elect Lab Toll switching telephone systems
US2726285A (en) * 1952-09-06 1955-12-06 Gen Dynamics Corp Dial cord circuit
US2769862A (en) * 1953-02-06 1956-11-06 Gen Dynamics Corp Convertible interoffice trunk

Also Published As

Publication number Publication date
CH276283A (en) 1951-06-30
USRE22440E (en) 1944-02-22
BE476596A (en)
USRE22441E (en) 1944-02-22
GB640032A (en) 1950-07-12
FR1031552A (en) 1953-06-24
US2208765A (en) 1940-07-23
NL72721C (en)
FR951758A (en) 1949-11-03
GB640033A (en) 1950-07-12
NL70515C (en)

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