JPS554183A - Circuit control system - Google Patents

Circuit control system

Info

Publication number
JPS554183A
JPS554183A JP7770378A JP7770378A JPS554183A JP S554183 A JPS554183 A JP S554183A JP 7770378 A JP7770378 A JP 7770378A JP 7770378 A JP7770378 A JP 7770378A JP S554183 A JPS554183 A JP S554183A
Authority
JP
Japan
Prior art keywords
circuit
converter
controlling
control
gate
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
JP7770378A
Other languages
Japanese (ja)
Other versions
JPS628996B2 (en
Inventor
Takashi Tabu
Toru Masuda
Yukio Ozawa
Kazuo Saito
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
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu 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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP7770378A priority Critical patent/JPS554183A/en
Publication of JPS554183A publication Critical patent/JPS554183A/en
Publication of JPS628996B2 publication Critical patent/JPS628996B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To simplify the unit constitution with control signal lines prevented from increasing in number by using some or all of digital signals transmitted via a call channel as signals for circuit control when a subscriber's circuit is not loop-detected. CONSTITUTION:Since the output of loop detection circuit LD is zero and gate G1 is conducting at the circuit corresponding part when the circuit is in the on-hook state, control signal CBIT is inputted by PCM code form digital channel DGLM to circuit control circuit LCC via gate G1. The PCM code is built in the D/A converter. As gate G2 stays open corresponding to input signal CBIT, circuit LCC has ON-OFF timing of a ringer controlled. Two control lines are only needed for controlling A/D converter A/D and D/A converter D/A. This system can be applied to various circuit corresponding parts such as an inter-office trunk. In addition, controlling the call of the trunk, controlling a leading-in relay in testing lines, etc., can be applied to all functions to be controlled with circuits unused.
JP7770378A 1978-06-27 1978-06-27 Circuit control system Granted JPS554183A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7770378A JPS554183A (en) 1978-06-27 1978-06-27 Circuit control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7770378A JPS554183A (en) 1978-06-27 1978-06-27 Circuit control system

Publications (2)

Publication Number Publication Date
JPS554183A true JPS554183A (en) 1980-01-12
JPS628996B2 JPS628996B2 (en) 1987-02-25

Family

ID=13641250

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7770378A Granted JPS554183A (en) 1978-06-27 1978-06-27 Circuit control system

Country Status (1)

Country Link
JP (1) JPS554183A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130116A (en) * 1973-04-13 1974-12-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130116A (en) * 1973-04-13 1974-12-13

Also Published As

Publication number Publication date
JPS628996B2 (en) 1987-02-25

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