JPS56120251A - Generating system for call tone and alarm tone - Google Patents

Generating system for call tone and alarm tone

Info

Publication number
JPS56120251A
JPS56120251A JP2365880A JP2365880A JPS56120251A JP S56120251 A JPS56120251 A JP S56120251A JP 2365880 A JP2365880 A JP 2365880A JP 2365880 A JP2365880 A JP 2365880A JP S56120251 A JPS56120251 A JP S56120251A
Authority
JP
Japan
Prior art keywords
tone
alarm
signal
call
speaker
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
JP2365880A
Other languages
Japanese (ja)
Inventor
Shinichi Tsuchida
Masao Takeda
Shinichi Miwa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2365880A priority Critical patent/JPS56120251A/en
Publication of JPS56120251A publication Critical patent/JPS56120251A/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
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

PURPOSE:To exclude the duplicated functions and to make effective use of device, by producing call tone and alarm from the same speaker in different tone which can be distinguished. CONSTITUTION:In case of the call from a device A, the output signal of an oscilltor 3 is coupled to a transmission circuit 2 by contacting a callout switch 1. In the device B, the signal fed via the transmission line is input to a reception circuit 9' and fed to a handset 10' and amplified 7' and connected to a speaker 8'. On the other hand, in the device A, if alarm is to be made, when an alarm switch 6 is constacted, the synthesis signal 5 between the signal from the oscillator 3 and the signal from the oscillator 4 is fed to the speaker 8 to produce the alarm tone.
JP2365880A 1980-02-27 1980-02-27 Generating system for call tone and alarm tone Pending JPS56120251A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2365880A JPS56120251A (en) 1980-02-27 1980-02-27 Generating system for call tone and alarm tone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2365880A JPS56120251A (en) 1980-02-27 1980-02-27 Generating system for call tone and alarm tone

Publications (1)

Publication Number Publication Date
JPS56120251A true JPS56120251A (en) 1981-09-21

Family

ID=12116604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2365880A Pending JPS56120251A (en) 1980-02-27 1980-02-27 Generating system for call tone and alarm tone

Country Status (1)

Country Link
JP (1) JPS56120251A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62117695U (en) * 1986-01-10 1987-07-25

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245304B2 (en) * 1974-05-06 1977-11-15

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245304B2 (en) * 1974-05-06 1977-11-15

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62117695U (en) * 1986-01-10 1987-07-25

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