JPS5748859A - Network controller - Google Patents

Network controller

Info

Publication number
JPS5748859A
JPS5748859A JP12350080A JP12350080A JPS5748859A JP S5748859 A JPS5748859 A JP S5748859A JP 12350080 A JP12350080 A JP 12350080A JP 12350080 A JP12350080 A JP 12350080A JP S5748859 A JPS5748859 A JP S5748859A
Authority
JP
Japan
Prior art keywords
hook
signal
restored
exchanger
relay
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
JP12350080A
Other languages
Japanese (ja)
Inventor
Kyoichi Nakakawara
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12350080A priority Critical patent/JPS5748859A/en
Publication of JPS5748859A publication Critical patent/JPS5748859A/en
Pending 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
    • H04M11/066—Telephone sets adapted for data transmision

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To perform data communication through the use of an idle time of telephone, by providing a network controller with priority over calls, at the presence of off-hook of a telephone set, even during the operation of a data terminal device. CONSTITUTION:When a telephone set 200 is at off-hook, a current flows to a photo coupler 111 in an off-hook detector 110 through a resistor 173 for current limit. The photo detection side of the photo coupler 111 in which one end is grounded is conductive and a signal F changes to ''0''. An automatic dial section 140 detects off-hook through the signal change and off-hook is informed to a data terminal device 300 via a connection terminal 106. The device 300 stops the data communication through this result. On the other hand, when the signal F changes to ''0'', the output of an AND circuit 165 is changed to ''0'' and a relay 170 is restored. Thus, a loop current is cut off and the exchanger is restored after a prescribed time. The relay 167 restores through a delay circuit 150 after the end of restoration of the exchanger.
JP12350080A 1980-09-08 1980-09-08 Network controller Pending JPS5748859A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12350080A JPS5748859A (en) 1980-09-08 1980-09-08 Network controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12350080A JPS5748859A (en) 1980-09-08 1980-09-08 Network controller

Publications (1)

Publication Number Publication Date
JPS5748859A true JPS5748859A (en) 1982-03-20

Family

ID=14862150

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12350080A Pending JPS5748859A (en) 1980-09-08 1980-09-08 Network controller

Country Status (1)

Country Link
JP (1) JPS5748859A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5792964A (en) * 1980-11-28 1982-06-09 Japanese National Railways<Jnr> Network control device
JPS5792963A (en) * 1980-11-28 1982-06-09 Japanese National Railways<Jnr> Network control device
JPS6249758A (en) * 1985-08-29 1987-03-04 Toshiba Corp Transmission terminal equipment
JPS62193449A (en) * 1986-02-20 1987-08-25 Fujitsu Ltd Hook-off detecting system
JPS62234454A (en) * 1986-04-04 1987-10-14 Nippon Telegr & Teleph Corp <Ntt> Plural-terminal storing circuit interface equipment
JPS6468172A (en) * 1987-09-09 1989-03-14 Canon Kk Computer
JPH01231467A (en) * 1987-11-04 1989-09-14 Ricoh Co Ltd Communication control equipment
JPH01177646U (en) * 1988-06-03 1989-12-19
US5304752A (en) * 1991-09-18 1994-04-19 Mitsubishi Denki Kabushiki Kaisha Elevator call allocation system based upon passenger waiting time

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5555654A (en) * 1978-10-20 1980-04-23 Nippon Telegr & Teleph Corp <Ntt> Selection unit for telephone line

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5555654A (en) * 1978-10-20 1980-04-23 Nippon Telegr & Teleph Corp <Ntt> Selection unit for telephone line

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5792964A (en) * 1980-11-28 1982-06-09 Japanese National Railways<Jnr> Network control device
JPS5792963A (en) * 1980-11-28 1982-06-09 Japanese National Railways<Jnr> Network control device
JPS6249758A (en) * 1985-08-29 1987-03-04 Toshiba Corp Transmission terminal equipment
JPS62193449A (en) * 1986-02-20 1987-08-25 Fujitsu Ltd Hook-off detecting system
JPS62234454A (en) * 1986-04-04 1987-10-14 Nippon Telegr & Teleph Corp <Ntt> Plural-terminal storing circuit interface equipment
JPS6468172A (en) * 1987-09-09 1989-03-14 Canon Kk Computer
JPH01231467A (en) * 1987-11-04 1989-09-14 Ricoh Co Ltd Communication control equipment
JPH01177646U (en) * 1988-06-03 1989-12-19
US5304752A (en) * 1991-09-18 1994-04-19 Mitsubishi Denki Kabushiki Kaisha Elevator call allocation system based upon passenger waiting time

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