JPS57131192A - Private branch exchange - Google Patents

Private branch exchange

Info

Publication number
JPS57131192A
JPS57131192A JP1644481A JP1644481A JPS57131192A JP S57131192 A JPS57131192 A JP S57131192A JP 1644481 A JP1644481 A JP 1644481A JP 1644481 A JP1644481 A JP 1644481A JP S57131192 A JPS57131192 A JP S57131192A
Authority
JP
Japan
Prior art keywords
subscriber
incoming
extension
circuit
private branch
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
JP1644481A
Other languages
Japanese (ja)
Inventor
Atsutake Sanagi
Hiroshi Tominaga
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 JP1644481A priority Critical patent/JPS57131192A/en
Publication of JPS57131192A publication Critical patent/JPS57131192A/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)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To directly connect an outgoing subscriber from a trunk line and an incoming subscriber of an extension, by constituting so that it can be instructed to the outgoing subscriber connected through the trunk line to dial an extension number. CONSTITUTION:When the private branch exchange as shown in the figure receives an incoming call from an outgoing subscriber 1 through a trunk line 3, a call signal detecting circuit 4 detects this incoming, and informs a sequence controlling circuit 5 of its incoming. The controlling circuit 5 operates an off- hooking circuit 6, makes it respond to its incoming, subsequently operates a talking circuit 7, and instructs the calling subscriber 1 to dial an extension number. After that, the controlling circuit 5 connects the outgoing subscriber 1 to the private branch exchange 9 which is capable of connecting extensions to each other, through the extension off-hooking circuit. The private branch exchange 9 connects the outgoing subscriber 1 and an extension incoming subscriber 10 in the same way as the case when each extension is connected regulary, in accordance with the extension number from the outgoing subscriber 1.
JP1644481A 1981-02-06 1981-02-06 Private branch exchange Pending JPS57131192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1644481A JPS57131192A (en) 1981-02-06 1981-02-06 Private branch exchange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1644481A JPS57131192A (en) 1981-02-06 1981-02-06 Private branch exchange

Publications (1)

Publication Number Publication Date
JPS57131192A true JPS57131192A (en) 1982-08-13

Family

ID=11916402

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1644481A Pending JPS57131192A (en) 1981-02-06 1981-02-06 Private branch exchange

Country Status (1)

Country Link
JP (1) JPS57131192A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63254848A (en) * 1987-04-10 1988-10-21 Nippon Telegr & Teleph Corp <Ntt> Individual incoming connection system
JPH06225021A (en) * 1993-01-25 1994-08-12 Nec Corp Single number call receiving method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63254848A (en) * 1987-04-10 1988-10-21 Nippon Telegr & Teleph Corp <Ntt> Individual incoming connection system
JPH06225021A (en) * 1993-01-25 1994-08-12 Nec Corp Single number call receiving method

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