NO743914L - - Google Patents

Info

Publication number
NO743914L
NO743914L NO743914A NO743914A NO743914L NO 743914 L NO743914 L NO 743914L NO 743914 A NO743914 A NO 743914A NO 743914 A NO743914 A NO 743914A NO 743914 L NO743914 L NO 743914L
Authority
NO
Norway
Prior art keywords
alternating current
emergency telephone
telephone box
signal line
box
Prior art date
Application number
NO743914A
Other languages
English (en)
Norwegian (no)
Inventor
G Neumann
Original Assignee
Neumann Elektronik Gmbh
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 Neumann Elektronik Gmbh filed Critical Neumann Elektronik Gmbh
Publication of NO743914L publication Critical patent/NO743914L/no

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)
NO743914A 1973-11-30 1974-10-30 NO743914L (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2359669A DE2359669A1 (de) 1973-11-30 1973-11-30 Verfahren zum betrieb einer notrufsaeule, insbesondere an landstrassen, sowie einrichtung zur durchfuehrung des verfahrens

Publications (1)

Publication Number Publication Date
NO743914L true NO743914L (de) 1975-06-23

Family

ID=5899497

Family Applications (1)

Application Number Title Priority Date Filing Date
NO743914A NO743914L (de) 1973-11-30 1974-10-30

Country Status (4)

Country Link
DE (1) DE2359669A1 (de)
FI (1) FI68174A (de)
NO (1) NO743914L (de)
SE (1) SE7414903L (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2440129A1 (fr) * 1978-10-26 1980-05-23 Clavel Roger Perfectionnements aux postes telephoniques d'appel d'urgence
FR2468260B1 (fr) * 1979-10-25 1987-11-27 Seriee Installation et procede de controle automatique de l'etat d'une ligne telephonique
DE19541400C1 (de) * 1995-11-07 1997-02-13 Neumann Elektronik Gmbh Informations-Notrufanlage

Also Published As

Publication number Publication date
FI68174A (de) 1975-05-31
SE7414903L (de) 1975-06-02
DE2359669A1 (de) 1975-06-05

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