JPS5494810A - Supply system for channel current - Google Patents

Supply system for channel current

Info

Publication number
JPS5494810A
JPS5494810A JP116678A JP116678A JPS5494810A JP S5494810 A JPS5494810 A JP S5494810A JP 116678 A JP116678 A JP 116678A JP 116678 A JP116678 A JP 116678A JP S5494810 A JPS5494810 A JP S5494810A
Authority
JP
Japan
Prior art keywords
channel current
central controller
telephone set
trunk
line resistance
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.)
Pending
Application number
JP116678A
Other languages
Japanese (ja)
Inventor
Takuji Mukaemachi
Kimifumi Kojima
Naohiko Yasui
Akira Kikuchi
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
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP116678A priority Critical patent/JPS5494810A/en
Publication of JPS5494810A publication Critical patent/JPS5494810A/en
Pending 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To realize the channel current supply system less in power loss, by selectively controlling the voltage of the DC supply current through the measurement of the line resistance of a subscriber and supplying channel current with the required minimum voltage. CONSTITUTION:When the telephone set 1 of the subscriber requested for the connection is determined, the central controller 18 closes the cross point switch 3 of the network 2 via switch driving unit 15 and connects and telephone set 1 with the line resistance measuring trunk 10. With this condition, the line resistance measuring trunk 10 measures the subscribing line resistor including the telephone set 1, converts the result into digital signal, and delivers it to the central controller 18 via the scanner 17. The central controller 18 selects the channel current supply trunk 11 or 12 with the resistance value read in. Thus, the power loss can be reduced by selecting optimum voltage.
JP116678A 1978-01-11 1978-01-11 Supply system for channel current Pending JPS5494810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP116678A JPS5494810A (en) 1978-01-11 1978-01-11 Supply system for channel current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP116678A JPS5494810A (en) 1978-01-11 1978-01-11 Supply system for channel current

Publications (1)

Publication Number Publication Date
JPS5494810A true JPS5494810A (en) 1979-07-26

Family

ID=11493845

Family Applications (1)

Application Number Title Priority Date Filing Date
JP116678A Pending JPS5494810A (en) 1978-01-11 1978-01-11 Supply system for channel current

Country Status (1)

Country Link
JP (1) JPS5494810A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH037460A (en) * 1989-06-05 1991-01-14 Fujitsu Denso Ltd Signal transmission level setting device
JPH037834A (en) * 1989-06-05 1991-01-16 Sanki Eng Co Ltd Cold heat accumulator system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5186904A (en) * 1974-12-23 1976-07-30 Ibm KANYUSHAKAISENINTAAFUEISUKAIRO

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5186904A (en) * 1974-12-23 1976-07-30 Ibm KANYUSHAKAISENINTAAFUEISUKAIRO

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH037460A (en) * 1989-06-05 1991-01-14 Fujitsu Denso Ltd Signal transmission level setting device
JPH037834A (en) * 1989-06-05 1991-01-16 Sanki Eng Co Ltd Cold heat accumulator system
JPH0610551B2 (en) * 1989-06-05 1994-02-09 三機工業株式会社 Cold storage system

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