JPS5748859A - Network controller - Google Patents
Network controllerInfo
- 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
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.
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)
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)
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 |
-
1980
- 1980-09-08 JP JP12350080A patent/JPS5748859A/en active Pending
Patent Citations (1)
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)
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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