JPS5577269A - Information transmitter - Google Patents

Information transmitter

Info

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
Application number
JP15036478A
Other languages
Japanese (ja)
Inventor
Hideki Yoshihara
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15036478A priority Critical patent/JPS5577269A/en
Publication of JPS5577269A publication Critical patent/JPS5577269A/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

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.
JP15036478A 1978-12-04 1978-12-04 Information transmitter Pending JPS5577269A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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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