JPS5693474A - Data transmission line release control system - Google Patents

Data transmission line release control system

Info

Publication number
JPS5693474A
JPS5693474A JP17083079A JP17083079A JPS5693474A JP S5693474 A JPS5693474 A JP S5693474A JP 17083079 A JP17083079 A JP 17083079A JP 17083079 A JP17083079 A JP 17083079A JP S5693474 A JPS5693474 A JP S5693474A
Authority
JP
Japan
Prior art keywords
mod3
modem
line
telephone line
detection signal
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
JP17083079A
Other languages
Japanese (ja)
Other versions
JPS5833745B2 (en
Inventor
Noriaki Fujimura
Tsuneo Kinoshita
Masa Aono
Hiroya Tanaka
Takashi Kako
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 JP54170830A priority Critical patent/JPS5833745B2/en
Publication of JPS5693474A publication Critical patent/JPS5693474A/en
Publication of JPS5833745B2 publication Critical patent/JPS5833745B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Communication Control (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

PURPOSE:To prevent charging, by detecting break of a carrier detection signal of the MODEM to release the telephone line in a transmission line where data is transmitted through a prescribed line and the telephone line. CONSTITUTION:Central processing unit CPU is connected to the terminl equipment through adapter ADP1, MODEM MOD1, MODEM MOD3, MODEM MOD3', and exchange LF. When MODEMs MOD3 and MOD3' are connected, the carrier detection signal is output under the turn-on state. When the line becomes faulty, the carrier detection signal is turned off. When this state continues for a prescribed time, network control unit NCU releases the telephone line. Consequently, since the telephone line is released when the specific line becomes faulty, charging is prevented.
JP54170830A 1979-12-27 1979-12-27 Data transmission path restoration control method Expired JPS5833745B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54170830A JPS5833745B2 (en) 1979-12-27 1979-12-27 Data transmission path restoration control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54170830A JPS5833745B2 (en) 1979-12-27 1979-12-27 Data transmission path restoration control method

Publications (2)

Publication Number Publication Date
JPS5693474A true JPS5693474A (en) 1981-07-29
JPS5833745B2 JPS5833745B2 (en) 1983-07-21

Family

ID=15912110

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54170830A Expired JPS5833745B2 (en) 1979-12-27 1979-12-27 Data transmission path restoration control method

Country Status (1)

Country Link
JP (1) JPS5833745B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63305657A (en) * 1987-06-08 1988-12-13 Nippon Telegr & Teleph Corp <Ntt> Signal line monitoring/control system for communication control equipment
KR100480240B1 (en) * 1997-08-27 2005-07-04 삼성전자주식회사 How to dismiss a modem at a private exchange

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63305657A (en) * 1987-06-08 1988-12-13 Nippon Telegr & Teleph Corp <Ntt> Signal line monitoring/control system for communication control equipment
KR100480240B1 (en) * 1997-08-27 2005-07-04 삼성전자주식회사 How to dismiss a modem at a private exchange

Also Published As

Publication number Publication date
JPS5833745B2 (en) 1983-07-21

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