JPS6236432B2 - - Google Patents

Info

Publication number
JPS6236432B2
JPS6236432B2 JP57214392A JP21439282A JPS6236432B2 JP S6236432 B2 JPS6236432 B2 JP S6236432B2 JP 57214392 A JP57214392 A JP 57214392A JP 21439282 A JP21439282 A JP 21439282A JP S6236432 B2 JPS6236432 B2 JP S6236432B2
Authority
JP
Japan
Prior art keywords
terminal
circuit
power supply
subscriber
switch
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
JP57214392A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59104892A (ja
Inventor
Takeo Koinuma
Kazuo Hamasato
Akira Ishizawa
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 JP57214392A priority Critical patent/JPS59104892A/ja
Publication of JPS59104892A publication Critical patent/JPS59104892A/ja
Publication of JPS6236432B2 publication Critical patent/JPS6236432B2/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
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
JP57214392A 1982-12-07 1982-12-07 電流供給監視方式 Granted JPS59104892A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57214392A JPS59104892A (ja) 1982-12-07 1982-12-07 電流供給監視方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57214392A JPS59104892A (ja) 1982-12-07 1982-12-07 電流供給監視方式

Publications (2)

Publication Number Publication Date
JPS59104892A JPS59104892A (ja) 1984-06-16
JPS6236432B2 true JPS6236432B2 (enrdf_load_stackoverflow) 1987-08-06

Family

ID=16655024

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57214392A Granted JPS59104892A (ja) 1982-12-07 1982-12-07 電流供給監視方式

Country Status (1)

Country Link
JP (1) JPS59104892A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS59104892A (ja) 1984-06-16

Similar Documents

Publication Publication Date Title
JPS59501239A (ja) 電話機内の電話線電力供給制御装置
US4376876A (en) DC Supply for an electronic signalling device
US4380687A (en) Power supply control circuit for subscriber carrier telephone system
JPS6196862A (ja) 加入者のための前置回路装置
JPS58187061A (ja) マイクロプロセツサを備えた電話機用の受話器オフフツク無用回線捕捉装置
US4539438A (en) Active impedance transformer assisted line feed circuit with supervision filtering
JPS6236432B2 (enrdf_load_stackoverflow)
US3906162A (en) Loop extender with bypass capacitor discharge
JPS6351319B2 (enrdf_load_stackoverflow)
WO1988008234A1 (en) Telephone subset circuit arrangement
US4223186A (en) Circuit arrangement for line-supplied subscriber stations having dial devices
US4609782A (en) Solid state signal insertion circuit and method for use in a telephony system or the like
US5317634A (en) Telephone subset arrangement
CA1196433A (en) Active impedance transformer assisted line feed circuit with supervision filtering
JPH0318382B2 (enrdf_load_stackoverflow)
US4122312A (en) Loop extender
JPS6196861A (ja) 電話ライン回路のための２重電圧源給電回路
JP2865181B2 (ja) 通信線遠隔切分装置
JPS60144062A (ja) 片線地気検出方式
JP2506104B2 (ja) 電話機における送話器切替方式
US5400398A (en) Electronic telephone set with low power hook switch
JP3525480B2 (ja) 側音低減回路
JPS63234653A (ja) 極性反転検出回路
JPH01264038A (ja) 信号伝達装置
JPS6313564A (ja) 加入者接続線路の心線を給電回路から分離する回路装置