JPS59104892A - 電流供給監視方式 - Google Patents

電流供給監視方式

Info

Publication number
JPS59104892A
JPS59104892A JP57214392A JP21439282A JPS59104892A JP S59104892 A JPS59104892 A JP S59104892A JP 57214392 A JP57214392 A JP 57214392A JP 21439282 A JP21439282 A JP 21439282A JP S59104892 A JPS59104892 A JP S59104892A
Authority
JP
Japan
Prior art keywords
circuit
terminal
subscriber
power supply
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.)
Granted
Application number
JP57214392A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6236432B2 (enrdf_load_stackoverflow
Inventor
Takeo Koinuma
濃沼　健夫
Kazuo Hamasato
和雄 浜里
Akira Ishizawa
石沢　昭
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 true JPS59104892A (ja) 1984-06-16
JPS6236432B2 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
JPS6236432B2 (enrdf_load_stackoverflow) 1987-08-06

Similar Documents

Publication Publication Date Title
US4723267A (en) Telephone line interface and dialer circuitry for telecommunications equipment
US4054941A (en) Range extender with gain
US4380687A (en) Power supply control circuit for subscriber carrier telephone system
US4306119A (en) Telephone outpulsing circuit
US4539438A (en) Active impedance transformer assisted line feed circuit with supervision filtering
JP2758088B2 (ja) ボタン電話用インタフェース装置
JPS59104892A (ja) 電流供給監視方式
US3851108A (en) Communication line supervisory circuit
US4674118A (en) Telephone line hold and hold release apparatus
US5191507A (en) Polarity inverting circuit
US4223186A (en) Circuit arrangement for line-supplied subscriber stations having dial devices
US4191859A (en) Loop, dial pulse and ring trip detection circuit with capacitive shunt network
US4388497A (en) Telephone power supply arrangement
US4234762A (en) Ring trip detector circuit
GB2037128A (en) Electronic telephone on a chip
US4017692A (en) Telephone call-diverter system
US4122312A (en) Loop extender
US4374303A (en) Power supply control circuit for subscriber carrier telephone system
US5317634A (en) Telephone subset arrangement
JPH0213988B2 (enrdf_load_stackoverflow)
EP0199865B1 (en) Active impedance transformer-assisted line feed circuit with filtering function of supervision signals
KR970004546A (ko) 임의 전화번호 자동삽입장치
US5400398A (en) Electronic telephone set with low power hook switch
JP2506104B2 (ja) 電話機における送話器切替方式
JP3001786B2 (ja) 電話回線インタフェース回路