CH343462A - Telephon-Teilnehmerapparat - Google Patents

Telephon-Teilnehmerapparat

Info

Publication number
CH343462A
CH343462A CH343462DA CH343462A CH 343462 A CH343462 A CH 343462A CH 343462D A CH343462D A CH 343462DA CH 343462 A CH343462 A CH 343462A
Authority
CH
Switzerland
Prior art keywords
telephone subscriber
subscriber set
telephone
subscriber
Prior art date
Application number
Other languages
English (en)
Inventor
Spence Leman Hugh
Original Assignee
Standard Telephon & Radio Ag
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 Standard Telephon & Radio Ag filed Critical Standard Telephon & Radio Ag
Publication of CH343462A publication Critical patent/CH343462A/de

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
CH343462D 1955-05-06 1956-04-17 Telephon-Teilnehmerapparat CH343462A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB343462X 1955-05-06

Publications (1)

Publication Number Publication Date
CH343462A true CH343462A (de) 1959-12-31

Family

ID=10364494

Family Applications (1)

Application Number Title Priority Date Filing Date
CH343462D CH343462A (de) 1955-05-06 1956-04-17 Telephon-Teilnehmerapparat

Country Status (3)

Country Link
US (1) US2916558A (de)
CH (1) CH343462A (de)
GB (1) GB793543A (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3046353A (en) * 1956-11-10 1962-07-24 Autophon Ag Telephone sub-station including microphone amplifier
US3066195A (en) * 1958-09-15 1962-11-27 Gen Dynamics Corp Signal transmitting and receiving station
GB956356A (en) * 1960-07-21 1964-04-22 Standard Telephones Cables Ltd Improvements in or relating to signalling methods between subscriber's sets and exchage
GB989232A (en) * 1961-12-08 1965-04-14 Post Office Improvements in or relating to signalling circuits

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1495295A (en) * 1924-05-27 Telephone circuits
US2283646A (en) * 1939-07-21 1942-05-19 Edna Levi Telephone apparatus and circuit therefor
US2332551A (en) * 1942-06-22 1943-10-26 Bell Telephone Labor Inc Telephone set circuit
US2487455A (en) * 1945-01-29 1949-11-08 Stromberg Carlson Co Telephone circuit
US2604545A (en) * 1950-05-19 1952-07-22 Bell Telephone Labor Inc Party line station signaling system
US2759179A (en) * 1952-12-05 1956-08-14 Bell Telephone Labor Inc Ringing circuit
US2761909A (en) * 1953-01-28 1956-09-04 Bell Telephone Labor Inc Multifrequency oscillator
US2818470A (en) * 1956-03-29 1957-12-31 Bell Telephone Labor Inc Compensated transistor circuit

Also Published As

Publication number Publication date
GB793543A (en) 1958-04-16
US2916558A (en) 1959-12-08

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