JPS5577269A - Information transmitter - Google Patents
Information transmitterInfo
- Publication number
- JPS5577269A JPS5577269A JP15036478A JP15036478A JPS5577269A JP S5577269 A JPS5577269 A JP S5577269A JP 15036478 A JP15036478 A JP 15036478A JP 15036478 A JP15036478 A JP 15036478A JP S5577269 A JPS5577269 A JP S5577269A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- call
- terminal
- contact
- detector
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To make it possible to constitute a transmitter economically with the need for LPF eliminated by providing a function, which recovers certain-time after operation, at a control contact where a call control signal is sent out. CONSTITUTION:To call a 2nd terminal from a 1st terminal, contact 121 is closed to send out the output of call control signal oscillator 61. The 2nd terminal detects this signal by detector 72. To answer to the call, the 2nd terminal colse contact 122 for a short time to send a call signal. The transmission time of this signal should be long enough for detector 71 to detect the signal. On detecting the signal, detector 71 breaks contact 121 and connects contacts 91 and 101 to receiver 21 and transmitter 11 to have a talk. Therefore, any other signal than the sound is not transmitted at the time of calling, and consequently there is no need to make a connection between LPF and receivers 21 and 22, so that a call control part can be constituted at low cost.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15036478A JPS5577269A (en) | 1978-12-04 | 1978-12-04 | Information transmitter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15036478A JPS5577269A (en) | 1978-12-04 | 1978-12-04 | Information transmitter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5577269A true JPS5577269A (en) | 1980-06-10 |
Family
ID=15495371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15036478A Pending JPS5577269A (en) | 1978-12-04 | 1978-12-04 | Information transmitter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5577269A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5088904A (en) * | 1973-10-24 | 1975-07-17 | ||
JPS5136805A (en) * | 1974-09-25 | 1976-03-27 | Omron Tateisi Electronics Co | DEETAT SUSHINSHISUTEMU |
-
1978
- 1978-12-04 JP JP15036478A patent/JPS5577269A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5088904A (en) * | 1973-10-24 | 1975-07-17 | ||
JPS5136805A (en) * | 1974-09-25 | 1976-03-27 | Omron Tateisi Electronics Co | DEETAT SUSHINSHISUTEMU |
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