AT245985B - Circuit arrangement for combined house telephone and door loudspeaker systems - Google Patents

Circuit arrangement for combined house telephone and door loudspeaker systems

Info

Publication number
AT245985B
AT245985B AT389763A AT389763A AT245985B AT 245985 B AT245985 B AT 245985B AT 389763 A AT389763 A AT 389763A AT 389763 A AT389763 A AT 389763A AT 245985 B AT245985 B AT 245985B
Authority
AT
Austria
Prior art keywords
circuit arrangement
loudspeaker systems
house telephone
combined house
door loudspeaker
Prior art date
Application number
AT389763A
Other languages
German (de)
Original Assignee
Int Standard Electric 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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Application granted granted Critical
Publication of AT245985B publication Critical patent/AT245985B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/025—Door telephones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
AT389763A 1962-09-05 1963-05-14 Circuit arrangement for combined house telephone and door loudspeaker systems AT245985B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST19676A DE1169523B (en) 1962-09-05 1962-09-05 Circuit arrangement for combined house telephone and door intercom systems

Publications (1)

Publication Number Publication Date
AT245985B true AT245985B (en) 1966-03-25

Family

ID=7458306

Family Applications (1)

Application Number Title Priority Date Filing Date
AT389763A AT245985B (en) 1962-09-05 1963-05-14 Circuit arrangement for combined house telephone and door loudspeaker systems

Country Status (2)

Country Link
AT (1) AT245985B (en)
DE (1) DE1169523B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1938095B1 (en) 2005-09-29 2016-04-13 Alltech Associates Inc. Composite chromatography column

Also Published As

Publication number Publication date
DE1169523B (en) 1964-05-06

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