JPS54139421A - Signal transmission system - Google Patents

Signal transmission system

Info

Publication number
JPS54139421A
JPS54139421A JP4751678A JP4751678A JPS54139421A JP S54139421 A JPS54139421 A JP S54139421A JP 4751678 A JP4751678 A JP 4751678A JP 4751678 A JP4751678 A JP 4751678A JP S54139421 A JPS54139421 A JP S54139421A
Authority
JP
Japan
Prior art keywords
signals
telautogram
output
circuit
aural
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP4751678A
Other languages
Japanese (ja)
Inventor
Akifumi Akiyama
Yukio Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP4751678A priority Critical patent/JPS54139421A/en
Publication of JPS54139421A publication Critical patent/JPS54139421A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/08—Arrangements for combining channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To reduce the transmission loss as well as to secure transmission of the aural signals without any disturbance of the higher harmonic wave for the signal transmission system which transmits the telautogram signals via the same channel as the aural signals by distributing the telautogram signals the reduction part of the aural signals. CONSTITUTION:In transmitting device S, the aural signals of telephone 1 are applied to one input of converter circuit 3 via PLF2, and the output signals of oscillator 4 are supplied to the other input of circuit 3. And the output of circuit 3 is applied to one side of compounding circuit 6 via LPF5. At the same time, the output of telautogram signal transmission part 7 is applied to the other side of circuit 6, and the telautogram signals are distributed at the low band part of the same channel as the aural signals for transmission. While in the receiving device R, the input given from the transmission line is combined to HPF11 and LPF12 each, and the output of HPF11 is applied to converter circuit 13 to be converted via the outpout given from oscillator 14. Then the aural signals are delivered to telephone 16 via LPF15. Also, the output of LPF12 is applied to telautogram signal receiving part 17, and the telautogram signals are delivered to the output of part 17.
JP4751678A 1978-04-21 1978-04-21 Signal transmission system Pending JPS54139421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4751678A JPS54139421A (en) 1978-04-21 1978-04-21 Signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4751678A JPS54139421A (en) 1978-04-21 1978-04-21 Signal transmission system

Publications (1)

Publication Number Publication Date
JPS54139421A true JPS54139421A (en) 1979-10-29

Family

ID=12777266

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4751678A Pending JPS54139421A (en) 1978-04-21 1978-04-21 Signal transmission system

Country Status (1)

Country Link
JP (1) JPS54139421A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0626168U (en) * 1992-07-10 1994-04-08 久勝 脇岡 Outlet for plug

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130517A (en) * 1976-04-26 1977-11-01 Kokusai Denshin Denwa Co Ltd Complex communication system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130517A (en) * 1976-04-26 1977-11-01 Kokusai Denshin Denwa Co Ltd Complex communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0626168U (en) * 1992-07-10 1994-04-08 久勝 脇岡 Outlet for plug

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