JPS5666959A - Network control system - Google Patents

Network control system

Info

Publication number
JPS5666959A
JPS5666959A JP14308379A JP14308379A JPS5666959A JP S5666959 A JPS5666959 A JP S5666959A JP 14308379 A JP14308379 A JP 14308379A JP 14308379 A JP14308379 A JP 14308379A JP S5666959 A JPS5666959 A JP S5666959A
Authority
JP
Japan
Prior art keywords
cut
signal
section
subscriber terminal
network 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.)
Pending
Application number
JP14308379A
Other languages
Japanese (ja)
Inventor
Kiyoshi Aizawa
Ikuo Hongo
Minoru Ooyama
Akihiro Fukui
Mitsuo Kawada
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
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone 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 Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14308379A priority Critical patent/JPS5666959A/en
Publication of JPS5666959A publication Critical patent/JPS5666959A/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

Landscapes

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

Abstract

PURPOSE:To detect the cut-off of remote subscriber on the way of various services, by providing the cut-off detection means of subscriber terminals with a network control device. CONSTITUTION:A network control device 2 is provided with a cut-off detection section 12 which detects the frequency component of BT signal delivered from a subscriber terminal 5 having the function of transmission of BT signal transiently at open wire or from an exchanger terminal 4 due to the cut-off of the subscriber terminal 5 on the way. At PB signal input timing 6 and timing 7 between digits, a control section 9 controls a change-over switch 11 via an interface section 15 to connect the said cut-off detection section 12 with a PB signal reception section 13 which receives the PB signal from the subscriber terminal 5 alternately to the line connection section 10, allowing to detect the presence of the frequency component of BT signal at the cut-off detection section 12 and to monitor the cut-off on the way of called subscriber terminal 5.
JP14308379A 1979-11-05 1979-11-05 Network control system Pending JPS5666959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14308379A JPS5666959A (en) 1979-11-05 1979-11-05 Network control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14308379A JPS5666959A (en) 1979-11-05 1979-11-05 Network control system

Publications (1)

Publication Number Publication Date
JPS5666959A true JPS5666959A (en) 1981-06-05

Family

ID=15330510

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14308379A Pending JPS5666959A (en) 1979-11-05 1979-11-05 Network control system

Country Status (1)

Country Link
JP (1) JPS5666959A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63188673U (en) * 1987-05-22 1988-12-02

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63188673U (en) * 1987-05-22 1988-12-02

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