JPS5277617A - Pilot current supply unit in telephon exchange - Google Patents

Pilot current supply unit in telephon exchange

Info

Publication number
JPS5277617A
JPS5277617A JP15442575A JP15442575A JPS5277617A JP S5277617 A JPS5277617 A JP S5277617A JP 15442575 A JP15442575 A JP 15442575A JP 15442575 A JP15442575 A JP 15442575A JP S5277617 A JPS5277617 A JP S5277617A
Authority
JP
Japan
Prior art keywords
exchange
telephon
supply unit
current supply
pilot current
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
JP15442575A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5413324B2 (enExample
Inventor
Akira Ishizawa
Takao Ueno
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 JP15442575A priority Critical patent/JPS5277617A/ja
Publication of JPS5277617A publication Critical patent/JPS5277617A/ja
Publication of JPS5413324B2 publication Critical patent/JPS5413324B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
JP15442575A 1975-12-24 1975-12-24 Pilot current supply unit in telephon exchange Granted JPS5277617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15442575A JPS5277617A (en) 1975-12-24 1975-12-24 Pilot current supply unit in telephon exchange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15442575A JPS5277617A (en) 1975-12-24 1975-12-24 Pilot current supply unit in telephon exchange

Publications (2)

Publication Number Publication Date
JPS5277617A true JPS5277617A (en) 1977-06-30
JPS5413324B2 JPS5413324B2 (enExample) 1979-05-30

Family

ID=15583878

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15442575A Granted JPS5277617A (en) 1975-12-24 1975-12-24 Pilot current supply unit in telephon exchange

Country Status (1)

Country Link
JP (1) JPS5277617A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5474609A (en) * 1977-11-28 1979-06-14 Hitachi Ltd Night changeover circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5474609A (en) * 1977-11-28 1979-06-14 Hitachi Ltd Night changeover circuit

Also Published As

Publication number Publication date
JPS5413324B2 (enExample) 1979-05-30

Similar Documents

Publication Publication Date Title
ES474718A1 (es) Perfeccionamientos en sistemas de comunicaciones con una pluralidad de estaciones
JPS5277617A (en) Pilot current supply unit in telephon exchange
JPS5215372A (en) Electronic watch
JPS52143068A (en) Solar battery timepiece
JPS52152273A (en) Action checking method of light dimming type smoke sensor
JPS5212514A (en) Power supply converting method
JPS51114003A (en) Automatic information unit
JPS5385596A (en) Electrospark machining device
JPS53138251A (en) Ternary detection circuit
JPS5327072A (en) Light emitting diode display watch
JPS52115106A (en) Telephone state detection system
JPS528287A (en) Anti-skid controller with abnormality detecting circuit
JPS5217372A (en) Diaphragm process electrolytic cell
JPS5229591A (en) Concentrated monitoring device
JPS5386274A (en) Solar battey driven timepiece
JPS53109408A (en) Identificating system for two party line telephone
JPS51116648A (en) Automatic balancing hybrid circuit
JPS523767A (en) Wet electric dust collecting method and aparatus
JPS51148316A (en) Ringing trunk
JPS51146840A (en) Photogyrator circuit
JPS5216099A (en) Plte carber
JPS5281513A (en) Multiioutput switching regulator equipped with positive and negative power source
JPS53113407A (en) Loop detection circuit
JPS5366108A (en) Trouble supervisory system of switch matrix device
JPS5263870A (en) Diaphragm type electrolytic cell