JPS5652989A - Incoming trunk switch control system - Google Patents

Incoming trunk switch control system

Info

Publication number
JPS5652989A
JPS5652989A JP12786879A JP12786879A JPS5652989A JP S5652989 A JPS5652989 A JP S5652989A JP 12786879 A JP12786879 A JP 12786879A JP 12786879 A JP12786879 A JP 12786879A JP S5652989 A JPS5652989 A JP S5652989A
Authority
JP
Japan
Prior art keywords
switch
circuit
current
driven
driving
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
JP12786879A
Other languages
Japanese (ja)
Other versions
JPS5948598B2 (en
Inventor
Hideo Mizutani
Takehiro Tachibana
Masami Miura
Shige Miyoshi
Takaaki Osaki
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.)
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Oki Electric Industry Co Ltd
NTT Inc
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP12786879A priority Critical patent/JPS5948598B2/en
Publication of JPS5652989A publication Critical patent/JPS5652989A/en
Publication of JPS5948598B2 publication Critical patent/JPS5948598B2/en
Expired 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)
  • Exchange Systems With Centralized Control (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To reduce the driving power consumption of the switch, by supervising a current by the current supervisory circuit as soon as the switch is driven, confirming that the switch is driven, by a current flowing into the circuit intermittently, and stopping driving the switch by the said fact. CONSTITUTION:In case ''call'' is being made, a logical signal ''1'' is input as input signals 13, 15, and it is held by the holding circuits 10, 12. The DC supplying circuit 8 is driven by the holding circuit 12, in order that a current is supplied to the trunk line 2. In this state, an output of the current supervisory circuit 7 is logical ''0'', and the gate 21 is opened and the reverse direction switch 4 is driven. As a result, the incoming trank 1 starts to make a current flow into the trunk line 2 through the outgoing trunk 3. Subsequently, when it reaches the circuit time constant, the circuit 7 detects a current flow, and stops driving the reverse direction switch 4. Since the switch 4 has the self-holding function, however, it remains conducting. Also, in case of driving the forward direction switch 5, too, the same control is executed.
JP12786879A 1979-10-05 1979-10-05 Incoming trunk switch control method Expired JPS5948598B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12786879A JPS5948598B2 (en) 1979-10-05 1979-10-05 Incoming trunk switch control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12786879A JPS5948598B2 (en) 1979-10-05 1979-10-05 Incoming trunk switch control method

Publications (2)

Publication Number Publication Date
JPS5652989A true JPS5652989A (en) 1981-05-12
JPS5948598B2 JPS5948598B2 (en) 1984-11-27

Family

ID=14970631

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12786879A Expired JPS5948598B2 (en) 1979-10-05 1979-10-05 Incoming trunk switch control method

Country Status (1)

Country Link
JP (1) JPS5948598B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5875364A (en) * 1981-10-29 1983-05-07 Oki Electric Ind Co Ltd Time series type exclusive logic system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61188594A (en) * 1985-02-18 1986-08-22 カシオ計算機株式会社 automatic rhythm playing device
JPS6238698U (en) * 1985-08-26 1987-03-07
JPH01179089A (en) * 1988-01-06 1989-07-17 Yamaha Corp Automatic playing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5875364A (en) * 1981-10-29 1983-05-07 Oki Electric Ind Co Ltd Time series type exclusive logic system

Also Published As

Publication number Publication date
JPS5948598B2 (en) 1984-11-27

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