CH251257A - Hörerschaltung in Teilnehmereinrichtung einer Wechselsprechanlage. - Google Patents

Hörerschaltung in Teilnehmereinrichtung einer Wechselsprechanlage.

Info

Publication number
CH251257A
CH251257A CH251257DA CH251257A CH 251257 A CH251257 A CH 251257A CH 251257D A CH251257D A CH 251257DA CH 251257 A CH251257 A CH 251257A
Authority
CH
Switzerland
Prior art keywords
subscriber equipment
intercom system
handset circuit
handset
circuit
Prior art date
Application number
Other languages
English (en)
Inventor
Aktiengesellschaft Autophon
Original Assignee
Autophon 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 Autophon Ag filed Critical Autophon Ag
Publication of CH251257A publication Critical patent/CH251257A/de

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
CH251257D 1943-11-03 1943-11-03 Hörerschaltung in Teilnehmereinrichtung einer Wechselsprechanlage. CH251257A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2461945X 1943-11-03

Publications (1)

Publication Number Publication Date
CH251257A true CH251257A (de) 1947-10-15

Family

ID=4569419

Family Applications (1)

Application Number Title Priority Date Filing Date
CH251257D CH251257A (de) 1943-11-03 1943-11-03 Hörerschaltung in Teilnehmereinrichtung einer Wechselsprechanlage.

Country Status (2)

Country Link
US (1) US2461945A (de)
CH (1) CH251257A (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577806A (en) * 1945-07-09 1951-12-11 Richard C Lindberg Network for intercommunication system
US2559778A (en) * 1948-04-02 1951-07-10 Modern Telephone Corp Intercommunication telephone system
DE1182304B (de) * 1963-06-22 1964-11-26 Standard Elektrik Lorenz Ag Konferenzschaltung mehrerer gleichberechtigter Zweidrahtteilnehmer fuer Gegensprechen
US3524936A (en) * 1964-11-10 1970-08-18 World Wide Electronics Inc Automatic telephone answering device having remote control and conference call capability

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1773776A (en) * 1928-03-02 1930-08-26 American Telephone & Telegraph Telephone conference arrangement
US1975932A (en) * 1933-01-09 1934-10-09 Albert L Mcafee Sound-receiving and transmitting system
US2030987A (en) * 1933-08-29 1936-02-18 American Telephone & Telegraph Oscillation control device
US2044305A (en) * 1935-07-01 1936-06-16 Turner Company Communication system
US2205142A (en) * 1937-02-03 1940-06-18 Holtzer Cabot Electric Co Loudspeaking telephone system
US2199220A (en) * 1939-07-18 1940-04-30 French Hubert Interstation communication system
US2214804A (en) * 1939-07-18 1940-09-17 Bell Telephone Labor Inc Two-way communication system
USRE22897E (en) * 1939-08-14 1947-07-15 Transmission system

Also Published As

Publication number Publication date
US2461945A (en) 1949-02-15

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