JPS56123159A - Interruptive connection control system - Google Patents

Interruptive connection control system

Info

Publication number
JPS56123159A
JPS56123159A JP2693980A JP2693980A JPS56123159A JP S56123159 A JPS56123159 A JP S56123159A JP 2693980 A JP2693980 A JP 2693980A JP 2693980 A JP2693980 A JP 2693980A JP S56123159 A JPS56123159 A JP S56123159A
Authority
JP
Japan
Prior art keywords
extension subscriber
telephone set
trunk
line
call
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
JP2693980A
Other languages
Japanese (ja)
Inventor
Hideaki Yamanouchi
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2693980A priority Critical patent/JPS56123159A/en
Publication of JPS56123159A publication Critical patent/JPS56123159A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)

Abstract

PURPOSE:To exercise interruptive connection control over an extension subscriber's telephone set which is being connected to a trunk line for a call, by providing memory relays, discriminating the kind of a call, corresponding to extension subscriber's telephone sets. CONSTITUTION:When extension subscriber's telephone set STA performs trunk line origination, common controller MKR closes the link between extension subscriber's telephone set STA and office trunk COTA, but at this time, common controller MKR operates the memory relay that corresponds to extension subscriber's telephone set in a line circuit memory unit. When a trunk-line incoming call from trunk-line B board ATTCON is connected to extension subscriber's telephone set STA, the memory relay is also operated. When an interruptive connection with this extension subscriber's telephone set STA is to be made, seat device POSU sends a busy tone to trunk-line B board ATTCON and the extension subscriber telephone set with which the interruptive connection is made to show that it is being connected to the trunk line for a call.
JP2693980A 1980-03-04 1980-03-04 Interruptive connection control system Pending JPS56123159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2693980A JPS56123159A (en) 1980-03-04 1980-03-04 Interruptive connection control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2693980A JPS56123159A (en) 1980-03-04 1980-03-04 Interruptive connection control system

Publications (1)

Publication Number Publication Date
JPS56123159A true JPS56123159A (en) 1981-09-28

Family

ID=12207111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2693980A Pending JPS56123159A (en) 1980-03-04 1980-03-04 Interruptive connection control system

Country Status (1)

Country Link
JP (1) JPS56123159A (en)

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