JPS55134591A - Exchange control system - Google Patents

Exchange control system

Info

Publication number
JPS55134591A
JPS55134591A JP4133479A JP4133479A JPS55134591A JP S55134591 A JPS55134591 A JP S55134591A JP 4133479 A JP4133479 A JP 4133479A JP 4133479 A JP4133479 A JP 4133479A JP S55134591 A JPS55134591 A JP S55134591A
Authority
JP
Japan
Prior art keywords
trunk
dial
tone
srt
party
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
JP4133479A
Other languages
Japanese (ja)
Inventor
Kaoru Hashimoto
Norihiko Inomoto
Akio Sato
Kiyobumi Hayashi
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 JP4133479A priority Critical patent/JPS55134591A/en
Publication of JPS55134591A publication Critical patent/JPS55134591A/en
Pending 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

Landscapes

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

Abstract

PURPOSE:To realize flexible exchange control by simplifying, by enabling one service trunk to receive a dial tone and dial signal and to send out the dial signal and service signal tone on origination. CONSTITUTION:When subscriber EX of a private branch exchange is placed in an off-hook state, it is connected to a trunk equipped with service trunk SRT, from which a dial tone is sent out. Next, dialing sends dial number information to central controller CC, which analyzes it to discriminate subscriber EX for a connection to a called subscriber. When outgoing to the outside is discriminated, a connection to outgoing trunk OGT is made. Under the control of controller CC, trunk SRT sends the dial signal to the party side via trunk OGT and is connected to the party called side. When the party is busy, a busy tone is sent out from trunk SRT.
JP4133479A 1979-04-05 1979-04-05 Exchange control system Pending JPS55134591A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4133479A JPS55134591A (en) 1979-04-05 1979-04-05 Exchange control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4133479A JPS55134591A (en) 1979-04-05 1979-04-05 Exchange control system

Publications (1)

Publication Number Publication Date
JPS55134591A true JPS55134591A (en) 1980-10-20

Family

ID=12605616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4133479A Pending JPS55134591A (en) 1979-04-05 1979-04-05 Exchange control system

Country Status (1)

Country Link
JP (1) JPS55134591A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63193760A (en) * 1987-02-06 1988-08-11 Iwatsu Electric Co Ltd Network connection control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63193760A (en) * 1987-02-06 1988-08-11 Iwatsu Electric Co Ltd Network connection control device

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