JPS57162862A - Callout signal control system - Google Patents

Callout signal control system

Info

Publication number
JPS57162862A
JPS57162862A JP4824581A JP4824581A JPS57162862A JP S57162862 A JPS57162862 A JP S57162862A JP 4824581 A JP4824581 A JP 4824581A JP 4824581 A JP4824581 A JP 4824581A JP S57162862 A JPS57162862 A JP S57162862A
Authority
JP
Japan
Prior art keywords
ringing
signal
inter
controller
control
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
JP4824581A
Other languages
Japanese (ja)
Other versions
JPS6310630B2 (en
Inventor
Shunichi Naito
Hiroshi Ishikawa
Shigeo Kodaira
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
Original Assignee
Fujitsu 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 filed Critical Fujitsu Ltd
Priority to JP4824581A priority Critical patent/JPS57162862A/en
Publication of JPS57162862A publication Critical patent/JPS57162862A/en
Publication of JPS6310630B2 publication Critical patent/JPS6310630B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To reduce noise at contacts, by making on/off of a ringing relay at zero crossing of a signal from a ringing signal source, in a ringing signal control system suitable for decentraized control system having a main controller and a sub-controller. CONSTITUTION:A ringing controller 8 having a detector 10 detecting a zero crosssing point of ringing to a signal waveform from a ringing signal source 13 is prpvided. The device 8 makes inter-control for the ringing signal at zero crosssing of ringing according to a inter-timing control signal from a main controller 7 and a signal from the detector 10 of zero crossing. Further, the ringing inter- controled is shared 6 corresponding to each line, and the inter timing added with the time of inter-delay is informed to a sub-controller 5, and ringer relay control 12 corresponding to the line is made to a dry period of the ringing signal under the control of the sub-controller 5 and a callout signal is transmitted to a subscriber.
JP4824581A 1981-03-31 1981-03-31 Callout signal control system Granted JPS57162862A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4824581A JPS57162862A (en) 1981-03-31 1981-03-31 Callout signal control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4824581A JPS57162862A (en) 1981-03-31 1981-03-31 Callout signal control system

Publications (2)

Publication Number Publication Date
JPS57162862A true JPS57162862A (en) 1982-10-06
JPS6310630B2 JPS6310630B2 (en) 1988-03-08

Family

ID=12798051

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4824581A Granted JPS57162862A (en) 1981-03-31 1981-03-31 Callout signal control system

Country Status (1)

Country Link
JP (1) JPS57162862A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6116661A (en) * 1984-07-03 1986-01-24 Fujitsu Ltd Call signal sending device
JPS6167345A (en) * 1984-09-11 1986-04-07 Rohm Co Ltd Duplexer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5328317A (en) * 1976-08-30 1978-03-16 Hitachi Ltd Control system of subscriber's calling signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5328317A (en) * 1976-08-30 1978-03-16 Hitachi Ltd Control system of subscriber's calling signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6116661A (en) * 1984-07-03 1986-01-24 Fujitsu Ltd Call signal sending device
JPH0318782B2 (en) * 1984-07-03 1991-03-13 Fujitsu Ltd
JPS6167345A (en) * 1984-09-11 1986-04-07 Rohm Co Ltd Duplexer

Also Published As

Publication number Publication date
JPS6310630B2 (en) 1988-03-08

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