JPS5619235A - Ringing suppressing system using digital filter - Google Patents

Ringing suppressing system using digital filter

Info

Publication number
JPS5619235A
JPS5619235A JP9374779A JP9374779A JPS5619235A JP S5619235 A JPS5619235 A JP S5619235A JP 9374779 A JP9374779 A JP 9374779A JP 9374779 A JP9374779 A JP 9374779A JP S5619235 A JPS5619235 A JP S5619235A
Authority
JP
Japan
Prior art keywords
current
wire
digital filter
subscriber
ringing
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
JP9374779A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6214969B2 (enrdf_load_stackoverflow
Inventor
Kaoru Tokunaga
Kozo Kamata
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 JP9374779A priority Critical patent/JPS5619235A/ja
Publication of JPS5619235A publication Critical patent/JPS5619235A/ja
Publication of JPS6214969B2 publication Critical patent/JPS6214969B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/03—Hybrid circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
JP9374779A 1979-07-25 1979-07-25 Ringing suppressing system using digital filter Granted JPS5619235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9374779A JPS5619235A (en) 1979-07-25 1979-07-25 Ringing suppressing system using digital filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9374779A JPS5619235A (en) 1979-07-25 1979-07-25 Ringing suppressing system using digital filter

Publications (2)

Publication Number Publication Date
JPS5619235A true JPS5619235A (en) 1981-02-23
JPS6214969B2 JPS6214969B2 (enrdf_load_stackoverflow) 1987-04-04

Family

ID=14091007

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9374779A Granted JPS5619235A (en) 1979-07-25 1979-07-25 Ringing suppressing system using digital filter

Country Status (1)

Country Link
JP (1) JPS5619235A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6408070B2 (en) * 1998-04-30 2002-06-18 Nortel Networks Limited Method and apparatus for echo control in a communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6408070B2 (en) * 1998-04-30 2002-06-18 Nortel Networks Limited Method and apparatus for echo control in a communication system

Also Published As

Publication number Publication date
JPS6214969B2 (enrdf_load_stackoverflow) 1987-04-04

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