BE747683A - SIGNAL TRANSMISSION DEVICE BY TELEPHONE LINE - Google Patents

SIGNAL TRANSMISSION DEVICE BY TELEPHONE LINE

Info

Publication number
BE747683A
BE747683A BE747683A BE747683A BE747683A BE 747683 A BE747683 A BE 747683A BE 747683 A BE747683 A BE 747683A BE 747683 A BE747683 A BE 747683A BE 747683 A BE747683 A BE 747683A
Authority
BE
Belgium
Prior art keywords
transmission device
signal transmission
telephone line
telephone
line
Prior art date
Application number
BE747683A
Other languages
French (fr)
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of BE747683A publication Critical patent/BE747683A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
    • 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
    • H04M19/026—Arrangements for interrupting the ringing current

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
BE747683A 1969-03-21 1970-03-20 SIGNAL TRANSMISSION DEVICE BY TELEPHONE LINE BE747683A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE395669A SE329647B (en) 1969-03-21 1969-03-21

Publications (1)

Publication Number Publication Date
BE747683A true BE747683A (en) 1970-08-31

Family

ID=20263217

Family Applications (1)

Application Number Title Priority Date Filing Date
BE747683A BE747683A (en) 1969-03-21 1970-03-20 SIGNAL TRANSMISSION DEVICE BY TELEPHONE LINE

Country Status (6)

Country Link
AU (1) AU1164370A (en)
BE (1) BE747683A (en)
DE (1) DE2010463A1 (en)
FR (1) FR2039824A5 (en)
NL (1) NL7002271A (en)
SE (1) SE329647B (en)

Also Published As

Publication number Publication date
FR2039824A5 (en) 1971-01-15
SE329647B (en) 1970-10-19
DE2010463A1 (en) 1970-09-24
AU1164370A (en) 1971-08-26
NL7002271A (en) 1970-09-23

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