JPS55102960A - Signal transmission system - Google Patents
Signal transmission systemInfo
- Publication number
- JPS55102960A JPS55102960A JP1016479A JP1016479A JPS55102960A JP S55102960 A JPS55102960 A JP S55102960A JP 1016479 A JP1016479 A JP 1016479A JP 1016479 A JP1016479 A JP 1016479A JP S55102960 A JPS55102960 A JP S55102960A
- Authority
- JP
- Japan
- Prior art keywords
- office
- transmission
- frequencies
- reception
- information
- 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
Links
Abstract
PURPOSE: To exercise a supervision over a transmission line by the output of the detection of a specific signal, obtained by combining several frequencies, by a reception office when no information input arrives at the terminal of a transmission office.
CONSTITUTION: Corresponding to information inputs 2∼2''' from transmission office 1, a signal obtained by combining specific frequencies among several frequencies is transmitted to reception office 7 via transmission line 6, and reception office 7 extracts information outputs corresponding to information inputs. Between information inputs 2∼2''' of transmission office 1, and coding part 3, AND circuit 15 is connected and when none of information inputs 2∼2''' arrives, an output is generated by circuit 15 and coded by coding part 3, and frequencies of oscillation parts 4∼4''' are combined and sent to reception office 7. Those combined frequencies are applied to detection circuits 9∼9''' via band-pass filters 8∼8''' of reception office 7 and when a specific frequency is detected, decoding part 10 outputs information outputs 11∼11''' and transmission-line supervisory output 18 is sent out from OR circuit 17.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1016479A JPS55102960A (en) | 1979-01-31 | 1979-01-31 | Signal transmission system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1016479A JPS55102960A (en) | 1979-01-31 | 1979-01-31 | Signal transmission system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55102960A true JPS55102960A (en) | 1980-08-06 |
JPS6151816B2 JPS6151816B2 (en) | 1986-11-11 |
Family
ID=11742635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1016479A Granted JPS55102960A (en) | 1979-01-31 | 1979-01-31 | Signal transmission system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55102960A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5930064U (en) * | 1982-08-16 | 1984-02-24 | 神田通信工業株式会社 | Signal transmission device for elevator equipment |
-
1979
- 1979-01-31 JP JP1016479A patent/JPS55102960A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5930064U (en) * | 1982-08-16 | 1984-02-24 | 神田通信工業株式会社 | Signal transmission device for elevator equipment |
Also Published As
Publication number | Publication date |
---|---|
JPS6151816B2 (en) | 1986-11-11 |
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