JPS5671344A - Car telephone with speaker - Google Patents

Car telephone with speaker

Info

Publication number
JPS5671344A
JPS5671344A JP14809779A JP14809779A JPS5671344A JP S5671344 A JPS5671344 A JP S5671344A JP 14809779 A JP14809779 A JP 14809779A JP 14809779 A JP14809779 A JP 14809779A JP S5671344 A JPS5671344 A JP S5671344A
Authority
JP
Japan
Prior art keywords
speaker
relay
telephone set
connection line
car
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
JP14809779A
Other languages
Japanese (ja)
Inventor
Hidekazu Matsumoto
Takuo Nakamura
Akio Sasaki
Shinichi Shinohara
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.)
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone Corp
Nippon Electric Co 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 NEC Corp, Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14809779A priority Critical patent/JPS5671344A/en
Publication of JPS5671344A publication Critical patent/JPS5671344A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To enable to use the speaker for car radio also for the telephone set, by providing the means which switches the speaker coupled to an audio signal generator to a telephone set sound amplifier in response to the intermittent connection of hook switch of a car telephone set or incoming call. CONSTITUTION:When an incoming call is given to a car telephone set 1, a connection line 12 is at high level to switch a relay 7 via a relay drive circuit 6. In this case, the call one signal is fed to the connection line 13, and this signal is amplified at an output amplifier 8 to sound the speaker 3 of a car radio 2 through the contacts of the relay 7 after switching and via an external terminal 4. When a hook switch FS in the receiver 1 is off, the incoming call information is off and the connection line 12 is at low level. But the connection line 11 is at high level with the hook information and the contacts of the relay 7 are held via an OR gate 5. When FS is on, the connection lines 11, 12 are at low level, the relay 7 is restored and the speaker 3 is connected to the radio 2.
JP14809779A 1979-11-15 1979-11-15 Car telephone with speaker Pending JPS5671344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14809779A JPS5671344A (en) 1979-11-15 1979-11-15 Car telephone with speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14809779A JPS5671344A (en) 1979-11-15 1979-11-15 Car telephone with speaker

Publications (1)

Publication Number Publication Date
JPS5671344A true JPS5671344A (en) 1981-06-13

Family

ID=15445172

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14809779A Pending JPS5671344A (en) 1979-11-15 1979-11-15 Car telephone with speaker

Country Status (1)

Country Link
JP (1) JPS5671344A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491694A (en) * 1981-10-23 1985-01-01 Michael Harmeyer Telephone to stereo amplifier interface coupling
JPS6226938A (en) * 1985-07-26 1987-02-04 Toyoda Gosei Co Ltd Automobile telephone set
JPS63176052A (en) * 1987-01-16 1988-07-20 Oki Electric Ind Co Ltd Telephone set for automobile
EP0531094A2 (en) * 1991-09-06 1993-03-10 Ford Motor Company Limited Integrated cellular telephone and vehicular audio system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491694A (en) * 1981-10-23 1985-01-01 Michael Harmeyer Telephone to stereo amplifier interface coupling
JPS6226938A (en) * 1985-07-26 1987-02-04 Toyoda Gosei Co Ltd Automobile telephone set
JPH0371819B2 (en) * 1985-07-26 1991-11-14 Toyoda Gosei Kk
JPS63176052A (en) * 1987-01-16 1988-07-20 Oki Electric Ind Co Ltd Telephone set for automobile
EP0531094A2 (en) * 1991-09-06 1993-03-10 Ford Motor Company Limited Integrated cellular telephone and vehicular audio system

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