JPS57190442A - Branch line communication system - Google Patents
Branch line communication systemInfo
- Publication number
- JPS57190442A JPS57190442A JP7341681A JP7341681A JPS57190442A JP S57190442 A JPS57190442 A JP S57190442A JP 7341681 A JP7341681 A JP 7341681A JP 7341681 A JP7341681 A JP 7341681A JP S57190442 A JPS57190442 A JP S57190442A
- Authority
- JP
- Japan
- Prior art keywords
- center
- communication
- terminal device
- line
- interrupt
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40143—Bus networks involving priority mechanisms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/403—Bus networks with centralised control, e.g. polling
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Time-Division Multiplex Systems (AREA)
- Small-Scale Networks (AREA)
Abstract
PURPOSE:To interrupt communication with high priority by connecting a switch enabling the line to be interrupted only in calling to a terminal device. CONSTITUTION:Many terminal devices like the one shown in the drawing and a center device are connected to a line Li. In the shown terminal device, a polling signal from the center device is received by a control part 2 through a signal receiving part 1 and the status of the self terminal device is sent to the center device through a transmission part 5 and a switching part 6. When the communication with the center is permitted, the communication with the center is performed by a device such as a telephone 3 through a communication controlling deice 7. No polling signal from the center device informs the control part 2 that the line Li is being used by another terminal device. If a communication request with high priority is generated in the self terminal device in said status and an interrupt switch 9 is depressed, an interrupt signal is sent to the center device through a switching circuit controlling part 8 and the line Li.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7341681A JPS57190442A (en) | 1981-05-18 | 1981-05-18 | Branch line communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7341681A JPS57190442A (en) | 1981-05-18 | 1981-05-18 | Branch line communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57190442A true JPS57190442A (en) | 1982-11-24 |
Family
ID=13517575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7341681A Pending JPS57190442A (en) | 1981-05-18 | 1981-05-18 | Branch line communication system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57190442A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59231947A (en) * | 1983-06-15 | 1984-12-26 | Matsushita Electric Works Ltd | Time division multiplex transmission system |
-
1981
- 1981-05-18 JP JP7341681A patent/JPS57190442A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59231947A (en) * | 1983-06-15 | 1984-12-26 | Matsushita Electric Works Ltd | Time division multiplex transmission system |
JPH038617B2 (en) * | 1983-06-15 | 1991-02-06 | Matsushita Electric Works Ltd |
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