JPS56119539A - Four-wire transmission system - Google Patents

Four-wire transmission system

Info

Publication number
JPS56119539A
JPS56119539A JP2247580A JP2247580A JPS56119539A JP S56119539 A JPS56119539 A JP S56119539A JP 2247580 A JP2247580 A JP 2247580A JP 2247580 A JP2247580 A JP 2247580A JP S56119539 A JPS56119539 A JP S56119539A
Authority
JP
Japan
Prior art keywords
signal
transmission
crosstalk
telephone
telephone signal
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
JP2247580A
Other languages
Japanese (ja)
Inventor
Hiroichi Murase
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2247580A priority Critical patent/JPS56119539A/en
Publication of JPS56119539A publication Critical patent/JPS56119539A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/32—Reducing cross-talk, e.g. by compensating

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To reduce the influence of crosstalk to make wide-band transmission possible, by arranging frequencies so that frequency bands of the up transmission signal and the down transmission signal do not overlap each other, in the four-wire transmission system using the balance cable. CONSTITUTION:In case that the telephone signal and the commercial television signal are transmitted simultaneously, down telephone signal 1 is arranged in the frequency band between up telephone signal 1 and commercial television signal 2. When crosstalk is generated on the down transmission line by up telephone signal 1, crosstalk has no influence upon the transmission signal because the transmission signal exists in up idle band 3 corresponding to down telephone signal 1.
JP2247580A 1980-02-25 1980-02-25 Four-wire transmission system Pending JPS56119539A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2247580A JPS56119539A (en) 1980-02-25 1980-02-25 Four-wire transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2247580A JPS56119539A (en) 1980-02-25 1980-02-25 Four-wire transmission system

Publications (1)

Publication Number Publication Date
JPS56119539A true JPS56119539A (en) 1981-09-19

Family

ID=12083738

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2247580A Pending JPS56119539A (en) 1980-02-25 1980-02-25 Four-wire transmission system

Country Status (1)

Country Link
JP (1) JPS56119539A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6376629A (en) * 1986-09-19 1988-04-06 Hitachi Zosen Corp Signal transmitting method for towing type responder
US6802362B2 (en) 2002-02-21 2004-10-12 Thermal Corp. Fin with elongated hole and heat pipe with elongated cross section

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6376629A (en) * 1986-09-19 1988-04-06 Hitachi Zosen Corp Signal transmitting method for towing type responder
US6802362B2 (en) 2002-02-21 2004-10-12 Thermal Corp. Fin with elongated hole and heat pipe with elongated cross section

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