JPS55154850A - Circuit control system of data transmitter - Google Patents

Circuit control system of data transmitter

Info

Publication number
JPS55154850A
JPS55154850A JP6156579A JP6156579A JPS55154850A JP S55154850 A JPS55154850 A JP S55154850A JP 6156579 A JP6156579 A JP 6156579A JP 6156579 A JP6156579 A JP 6156579A JP S55154850 A JPS55154850 A JP S55154850A
Authority
JP
Japan
Prior art keywords
circuits
circuit
series
parallel
over
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.)
Granted
Application number
JP6156579A
Other languages
Japanese (ja)
Other versions
JPS5840383B2 (en
Inventor
Yoshimasa Tagami
Mitsuhiro Matsue
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6156579A priority Critical patent/JPS5840383B2/en
Publication of JPS55154850A publication Critical patent/JPS55154850A/en
Publication of JPS5840383B2 publication Critical patent/JPS5840383B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To make it possible to use circuits while circuit quality is held high by changing circuits over when the density of error occurrence exceeds a fixed value. CONSTITUTION:Parallel digital data (a), after parity bits are added by parity bit adding circuits 11 and 11', are converted by parallel-series converting circuits 12 and 12' into series data, which are sent out by way of modulating circuits 13 and 13'. In receiver 2, the data are separately demodulated by demodulating circuits 21 and 21' and then series/parallel-converted by series/parallel converting circuits 22 and 22', but output data (b) are output from either of two systems. Receiving error word detection signal (c) from circuit 22, error word testing circuit 23 exercises a supervision over the generation density of error words and, when this generation density exceeds a fixed value, switches change-over circuit 24 to disallow signals to pass. Simultaneously, control signal (d) from circuit 24 places change-over circuit 24' in a signal passable state.
JP6156579A 1979-05-21 1979-05-21 Line control method for data transmission equipment Expired JPS5840383B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6156579A JPS5840383B2 (en) 1979-05-21 1979-05-21 Line control method for data transmission equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6156579A JPS5840383B2 (en) 1979-05-21 1979-05-21 Line control method for data transmission equipment

Publications (2)

Publication Number Publication Date
JPS55154850A true JPS55154850A (en) 1980-12-02
JPS5840383B2 JPS5840383B2 (en) 1983-09-05

Family

ID=13174759

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6156579A Expired JPS5840383B2 (en) 1979-05-21 1979-05-21 Line control method for data transmission equipment

Country Status (1)

Country Link
JP (1) JPS5840383B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57162551A (en) * 1981-03-13 1982-10-06 Thomson Csf Switching device for tata tansmission channel
JPS5941971A (en) * 1982-09-01 1984-03-08 Sanyo Electric Co Ltd Facsimile device
JPS59174042A (en) * 1983-03-23 1984-10-02 Hitachi Ltd Detecting circuit for pcm code error factor
JPS60109945A (en) * 1983-11-18 1985-06-15 Japanese National Railways<Jnr> Automatic switching device of multiplex transmission system
JPS60125032A (en) * 1983-12-09 1985-07-04 Fujitsu Ltd Switching system for information collection route
JPH0332850U (en) * 1990-08-09 1991-03-29

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57162551A (en) * 1981-03-13 1982-10-06 Thomson Csf Switching device for tata tansmission channel
JPH031857B2 (en) * 1981-03-13 1991-01-11 Thomson Csf
JPS5941971A (en) * 1982-09-01 1984-03-08 Sanyo Electric Co Ltd Facsimile device
JPS638671B2 (en) * 1982-09-01 1988-02-24 Sanyo Denki Kk
JPS59174042A (en) * 1983-03-23 1984-10-02 Hitachi Ltd Detecting circuit for pcm code error factor
JPS60109945A (en) * 1983-11-18 1985-06-15 Japanese National Railways<Jnr> Automatic switching device of multiplex transmission system
JPS60125032A (en) * 1983-12-09 1985-07-04 Fujitsu Ltd Switching system for information collection route
JPH0244439B2 (en) * 1983-12-09 1990-10-03 Fujitsu Ltd
JPH0332850U (en) * 1990-08-09 1991-03-29

Also Published As

Publication number Publication date
JPS5840383B2 (en) 1983-09-05

Similar Documents

Publication Publication Date Title
AU529926B2 (en) Paged receiver battery saver
JPS5555412A (en) Signal recording and reproducing device
JPS55154850A (en) Circuit control system of data transmitter
GB1504177A (en) Dictation system
EP0165048A3 (en) Railway track circuit equipment
JPS537352A (en) Data collection system in digital telemeter system
US3175157A (en) Statistical framing of code words in a pulse code receiver
JPS5537005A (en) Communication mode setting system
JPS5666947A (en) Data transmission method
JPS6330035A (en) Digital data transmission method
JPS56122567A (en) Digital talking equipment
JPS57136845A (en) Coding and transfer system of information data
JPS56122251A (en) Synchronous control system
SU1088144A1 (en) Bipulse signal receiver
JPS5630347A (en) Single-speed digital subscriber&#39;s line transmission system
SU853810A1 (en) Discrete signal receiving device
SU543192A1 (en) Device for transmitting digital signals
JPS55165051A (en) Transmitting method of pcm signal
JPS5451417A (en) Facsimile receiver
SU631973A1 (en) Trainer for radiotelegraphist
SU720773A1 (en) Device for transmitting discrete information
JPS5485020A (en) Digital signal processing unit
JPS5765939A (en) Digital information communication system
JPS556961A (en) Error control system
JPS556909A (en) Error correction system