BE756930A - EQUIPMENT FOR MONITORING TELECOMMUNICATION LINES AND RADIO-CHANNELS USING ACOUSTIC FREQUENCY - Google Patents

EQUIPMENT FOR MONITORING TELECOMMUNICATION LINES AND RADIO-CHANNELS USING ACOUSTIC FREQUENCY

Info

Publication number
BE756930A
BE756930A BE756930DA BE756930A BE 756930 A BE756930 A BE 756930A BE 756930D A BE756930D A BE 756930DA BE 756930 A BE756930 A BE 756930A
Authority
BE
Belgium
Prior art keywords
channels
radio
equipment
acoustic frequency
telecommunication lines
Prior art date
Application number
Other languages
French (fr)
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.)
Publication date
Publication of BE756930A publication Critical patent/BE756930A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Alarm Systems (AREA)
BE756930D 1969-10-02 EQUIPMENT FOR MONITORING TELECOMMUNICATION LINES AND RADIO-CHANNELS USING ACOUSTIC FREQUENCY BE756930A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691949792 DE1949792A1 (en) 1969-10-02 1969-10-02 Device for monitoring telecommunication lines and radio lines by means of audio frequency

Publications (1)

Publication Number Publication Date
BE756930A true BE756930A (en) 1971-03-16

Family

ID=5747174

Family Applications (1)

Application Number Title Priority Date Filing Date
BE756930D BE756930A (en) 1969-10-02 EQUIPMENT FOR MONITORING TELECOMMUNICATION LINES AND RADIO-CHANNELS USING ACOUSTIC FREQUENCY

Country Status (4)

Country Link
BE (1) BE756930A (en)
CH (1) CH526237A (en)
DE (1) DE1949792A1 (en)
NL (1) NL7012398A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2838816A1 (en) * 1978-09-06 1980-03-20 Tekade Felten & Guilleaume LOOP TEST FOR DATA TRANSFER ROUTES
AT406435B (en) * 1996-07-16 2000-05-25 Ericsson Austria Ag METHOD FOR DETERMINING THE LINE CONDITION OF A TRANSMISSION LINE AND CIRCUIT ARRANGEMENT FOR IMPLEMENTING THE METHOD

Also Published As

Publication number Publication date
DE1949792A1 (en) 1971-04-08
CH526237A (en) 1972-07-31
NL7012398A (en) 1971-04-06

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: NEUMANN ELEKTRONIK G.M.B.H.

Effective date: 19881031