FI870286A - ANORDINATION OF THE COMMITTEE ON COMMUNICATIONS IN THE UNDERTAKING. - Google Patents

ANORDINATION OF THE COMMITTEE ON COMMUNICATIONS IN THE UNDERTAKING. Download PDF

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Publication number
FI870286A
FI870286A FI870286A FI870286A FI870286A FI 870286 A FI870286 A FI 870286A FI 870286 A FI870286 A FI 870286A FI 870286 A FI870286 A FI 870286A FI 870286 A FI870286 A FI 870286A
Authority
FI
Finland
Prior art keywords
anordination
undertaking
committee
communications
Prior art date
Application number
FI870286A
Other languages
Finnish (fi)
Other versions
FI870286A0 (en
FI77131B (en
FI77131C (en
Inventor
Antti Berg
Original Assignee
Outokumpu Oy
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 Outokumpu Oy filed Critical Outokumpu Oy
Priority to FI870286A priority Critical patent/FI77131C/en
Publication of FI870286A0 publication Critical patent/FI870286A0/en
Priority to DE19873741866 priority patent/DE3741866C2/en
Priority to JP62315437A priority patent/JPH07118680B2/en
Priority to GB8729449A priority patent/GB2200270B/en
Priority to FR8800580A priority patent/FR2610156B1/en
Publication of FI870286A publication Critical patent/FI870286A/en
Publication of FI77131B publication Critical patent/FI77131B/en
Application granted granted Critical
Publication of FI77131C publication Critical patent/FI77131C/en
Priority to US08/123,691 priority patent/US5345473A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Radio Transmission System (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Transmitters (AREA)
FI870286A 1987-01-22 1987-01-22 Device for providing bi-directional communication in underground spaces FI77131C (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FI870286A FI77131C (en) 1987-01-22 1987-01-22 Device for providing bi-directional communication in underground spaces
DE19873741866 DE3741866C2 (en) 1987-01-22 1987-12-10 Device for two-way radio communication in underground systems
JP62315437A JPH07118680B2 (en) 1987-01-22 1987-12-15 Two-way communication device for underground facility
GB8729449A GB2200270B (en) 1987-01-22 1987-12-17 Apparatus for providing two-way communication in underground facilities
FR8800580A FR2610156B1 (en) 1987-01-22 1988-01-20 APPARATUS FOR TWO-WAY COMMUNICATION IN UNDERGROUND FACILITIES
US08/123,691 US5345473A (en) 1987-01-22 1993-09-17 Apparatus for providing two-way communication in underground facilities

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI870286A FI77131C (en) 1987-01-22 1987-01-22 Device for providing bi-directional communication in underground spaces
FI870286 1987-01-22

Publications (4)

Publication Number Publication Date
FI870286A0 FI870286A0 (en) 1987-01-22
FI870286A true FI870286A (en) 1988-07-23
FI77131B FI77131B (en) 1988-09-30
FI77131C FI77131C (en) 1989-01-10

Family

ID=8523819

Family Applications (1)

Application Number Title Priority Date Filing Date
FI870286A FI77131C (en) 1987-01-22 1987-01-22 Device for providing bi-directional communication in underground spaces

Country Status (5)

Country Link
JP (1) JPH07118680B2 (en)
DE (1) DE3741866C2 (en)
FI (1) FI77131C (en)
FR (1) FR2610156B1 (en)
GB (1) GB2200270B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3942320A1 (en) * 1989-10-10 1991-04-11 Wk Elektronik Gmbh Communication system esp. for salt mine - uses single frequency phase locked loop radio system at base stations connected by wire to central station

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3825829A (en) * 1973-01-29 1974-07-23 Motorola Inc Radio system employing simultaneously triggered pulse repeaters
JPS599041B2 (en) * 1976-10-05 1984-02-29 三菱電機株式会社 thin film mirror
JPS54123819A (en) * 1978-03-17 1979-09-26 Kiyoshi Takizawa Under soil or water signal transmitter
JPS5726942A (en) * 1980-07-25 1982-02-13 Tokyo Gas Co Ltd Data transmission system
GB2083977B (en) * 1980-08-26 1984-08-22 Standard Telephones Cables Ltd Single channel duplex radio system
GB2109197B (en) * 1981-10-13 1985-12-04 Standard Telephones Cables Ltd Radio system
US4777652A (en) * 1982-07-27 1988-10-11 A.R.F. Products Radio communication systems for underground mines
FR2538645B1 (en) * 1982-12-28 1986-04-11 Thomson Csf METHOD AND DEVICE FOR INTERPOLATING SPEECH IN A DIGITAL SPEECH TRANSMISSION SYSTEM

Also Published As

Publication number Publication date
FR2610156B1 (en) 1994-06-10
GB8729449D0 (en) 1988-02-03
FI870286A0 (en) 1987-01-22
JPS63194425A (en) 1988-08-11
DE3741866C2 (en) 1997-04-03
GB2200270A (en) 1988-07-27
GB2200270B (en) 1991-06-26
DE3741866A1 (en) 1988-08-04
FR2610156A1 (en) 1988-07-29
FI77131B (en) 1988-09-30
FI77131C (en) 1989-01-10
JPH07118680B2 (en) 1995-12-18

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Legal Events

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MM Patent lapsed
MM Patent lapsed

Owner name: OUTOKUMPU OY