JPS5553941A - Signal transmission device for double-series transmission lines - Google Patents

Signal transmission device for double-series transmission lines

Info

Publication number
JPS5553941A
JPS5553941A JP12734978A JP12734978A JPS5553941A JP S5553941 A JPS5553941 A JP S5553941A JP 12734978 A JP12734978 A JP 12734978A JP 12734978 A JP12734978 A JP 12734978A JP S5553941 A JPS5553941 A JP S5553941A
Authority
JP
Japan
Prior art keywords
lines
double
transmission
transmission lines
hybrid
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
JP12734978A
Other languages
Japanese (ja)
Inventor
Yoshio Shionaga
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12734978A priority Critical patent/JPS5553941A/en
Publication of JPS5553941A publication Critical patent/JPS5553941A/en
Pending 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)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

PURPOSE:To secure a simple switching for the double transmission lines by forming the communication control unit of the master station into the double-series structure and gathering the signals at the slave station via the hybrid branching circuit provided in the opposite direction to the control unit. CONSTITUTION:Two units of communication control units 2 and 2' of the master station are connected to transmission lines A13 and B14 via MODEM 3 and 3'. Transmitter 12 of the slave station performs transmission with branching by hybrid 5 and via MODEM 8. At the reception side hybrid 4 is used in backward way to gather the signals and then to supply them to MODEM 8. Either one of lines A and B is decided to use for transmission by centralized control computer 1 of the master station, and the carrier is transmitted to only one of the two lines for the signal transmission. In such way, the switching is possible between the two transmission lines in a simple structure and without using any special automatic switching device.
JP12734978A 1978-10-18 1978-10-18 Signal transmission device for double-series transmission lines Pending JPS5553941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12734978A JPS5553941A (en) 1978-10-18 1978-10-18 Signal transmission device for double-series transmission lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12734978A JPS5553941A (en) 1978-10-18 1978-10-18 Signal transmission device for double-series transmission lines

Publications (1)

Publication Number Publication Date
JPS5553941A true JPS5553941A (en) 1980-04-19

Family

ID=14957722

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12734978A Pending JPS5553941A (en) 1978-10-18 1978-10-18 Signal transmission device for double-series transmission lines

Country Status (1)

Country Link
JP (1) JPS5553941A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6184135A (en) * 1984-10-01 1986-04-28 Fujitsu Ltd Base band switching circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6184135A (en) * 1984-10-01 1986-04-28 Fujitsu Ltd Base band switching circuit

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