JPS6231543B2 - - Google Patents

Info

Publication number
JPS6231543B2
JPS6231543B2 JP4140879A JP4140879A JPS6231543B2 JP S6231543 B2 JPS6231543 B2 JP S6231543B2 JP 4140879 A JP4140879 A JP 4140879A JP 4140879 A JP4140879 A JP 4140879A JP S6231543 B2 JPS6231543 B2 JP S6231543B2
Authority
JP
Japan
Prior art keywords
circuit
terminal
subscriber
input
output
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.)
Expired
Application number
JP4140879A
Other languages
English (en)
Japanese (ja)
Other versions
JPS55134571A (en
Inventor
Kunio Nagashima
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
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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP4140879A priority Critical patent/JPS55134571A/ja
Publication of JPS55134571A publication Critical patent/JPS55134571A/ja
Publication of JPS6231543B2 publication Critical patent/JPS6231543B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
JP4140879A 1979-04-05 1979-04-05 Subscriber's circuit Granted JPS55134571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4140879A JPS55134571A (en) 1979-04-05 1979-04-05 Subscriber's circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4140879A JPS55134571A (en) 1979-04-05 1979-04-05 Subscriber's circuit

Publications (2)

Publication Number Publication Date
JPS55134571A JPS55134571A (en) 1980-10-20
JPS6231543B2 true JPS6231543B2 (OSRAM) 1987-07-09

Family

ID=12607523

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4140879A Granted JPS55134571A (en) 1979-04-05 1979-04-05 Subscriber's circuit

Country Status (1)

Country Link
JP (1) JPS55134571A (OSRAM)

Also Published As

Publication number Publication date
JPS55134571A (en) 1980-10-20

Similar Documents

Publication Publication Date Title
US5255317A (en) Subscriber line interface circuit for serving ISDN subscribers using echo cancellers and POTS subscribers
JP2645022B2 (ja) 加入者回路
US3855431A (en) Electronic hybrid amplifier
CA1111586A (en) Circuit for electronic subscriber feed
JPH0671343B2 (ja) ２線式伝送路中の縦及び横方向電流測定回路
US3823273A (en) Subscriber's telephone circuit
JPS6231543B2 (OSRAM)
JPS628997B2 (OSRAM)
CA1240089A (en) Circuit for maintaining hybrid cancellation of signals in a communication system
US4358644A (en) Bilateral current source for a multi-terminal intercom
JPS6256691B2 (OSRAM)
US4178484A (en) Long line telephone system with an amplifying substation
JPS628983B2 (OSRAM)
US3894192A (en) DX signaling circuit
JPS6230546B2 (OSRAM)
KR100446529B1 (ko) 키폰시스템에서 측음 상쇄 하이브리드 인터페이스회로
KR910003301B1 (ko) 교환시스템과 교환시스템간의 임피던스 정합 및 자동이득 조절회로
JPS6126740B2 (OSRAM)
JPS637691B2 (OSRAM)
JPH0290887A (ja) ボタン電話装置における防側音装置
US4230904A (en) Signal control circuit
JP2646669B2 (ja) 電子式ハイブリッド回路
SU1241487A1 (ru) Абонентское соединительное устройство
JPS6044855B2 (ja) 側音防止回路
JPS6160021A (ja) 電子化ハイブリツド回路