JPS55110462A - Line selection system - Google Patents

Line selection system

Info

Publication number
JPS55110462A
JPS55110462A JP1825579A JP1825579A JPS55110462A JP S55110462 A JPS55110462 A JP S55110462A JP 1825579 A JP1825579 A JP 1825579A JP 1825579 A JP1825579 A JP 1825579A JP S55110462 A JPS55110462 A JP S55110462A
Authority
JP
Japan
Prior art keywords
line
terminals
branch
usage
state
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
JP1825579A
Other languages
Japanese (ja)
Inventor
Masao Terasawa
Makoto Omura
Yoshiyuki Ume
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 JP1825579A priority Critical patent/JPS55110462A/en
Publication of JPS55110462A publication Critical patent/JPS55110462A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/71—Substation extension arrangements
    • H04M1/715—Substation extension arrangements using two or more extensions per line

Landscapes

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

Abstract

PURPOSE:To prevent the deterioration of transmission characteristics, without losing the flexibility of line, by providing the control switch at the branch junction point, and separating the branch line not in use from the communication line through the control of the control switch in response to the state of usage of the terminals. CONSTITUTION:The switch sections 15 and 16 are placed between the main line station side terminal of the telephone station 1, main line terminal side terminal 9 and branch line terminal 10, and the state of usage is sensed with the current sensing sections 11-14 placed at the terminals 9 and 10, for the terminals 9 and 10. Further, in response to the state of usage of the terminals 9 and 10, the switch sections 15, 16 are controlled to separate the branch lines not in use, and the deterioration of the transmission characteristics can be prevented without losing the flexibility of line.
JP1825579A 1979-02-19 1979-02-19 Line selection system Pending JPS55110462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1825579A JPS55110462A (en) 1979-02-19 1979-02-19 Line selection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1825579A JPS55110462A (en) 1979-02-19 1979-02-19 Line selection system

Publications (1)

Publication Number Publication Date
JPS55110462A true JPS55110462A (en) 1980-08-25

Family

ID=11966564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1825579A Pending JPS55110462A (en) 1979-02-19 1979-02-19 Line selection system

Country Status (1)

Country Link
JP (1) JPS55110462A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6399484U (en) * 1986-12-18 1988-06-28

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6399484U (en) * 1986-12-18 1988-06-28

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