JPS56117445A - Telephone set for installation on travelling object - Google Patents

Telephone set for installation on travelling object

Info

Publication number
JPS56117445A
JPS56117445A JP2184980A JP2184980A JPS56117445A JP S56117445 A JPS56117445 A JP S56117445A JP 2184980 A JP2184980 A JP 2184980A JP 2184980 A JP2184980 A JP 2184980A JP S56117445 A JPS56117445 A JP S56117445A
Authority
JP
Japan
Prior art keywords
circuit
relay
microphone
actuated
switch
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
Application number
JP2184980A
Other languages
Japanese (ja)
Other versions
JPS5920208B2 (en
Inventor
Masakazu Nishino
Akio Sasaki
Masayuki Yamato
Hiroo Mafune
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.)
Nippon Telegraph and Telephone Corp
Panasonic Mobile Communications Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Matsushita Communication Industrial 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 Nippon Telegraph and Telephone Corp, Matsushita Communication Industrial Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP55021849A priority Critical patent/JPS5920208B2/en
Publication of JPS56117445A publication Critical patent/JPS56117445A/en
Publication of JPS5920208B2 publication Critical patent/JPS5920208B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

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

Abstract

PURPOSE:To realize a reduction of power consumption during the queuing time, by throwing in the main power source of a hand-free telephone only when necessary for a call. CONSTITUTION:In case the close-talking microphone 9 is used, the electrostatic switch 10 is turned on. Then the power supply control circuit 14 detects the ON of the switch 10 and switches the switch circuit to the side of the microphone 9. At the same time, the power supply control relay 15 is actuated by the circuit 14. Thus the power is supplied to the main control circuit 16 and the speaker driving amplifier 22 via the relay contact 17 to secure a call with the other side after a connection of the circuit secured by a dial operation of the key matrix 18. While in case a floor- type microphone is used, the voice is amplified by the microphone amplifier 12 and transmitted to the level deciding circuit 13. The relay 15 is actuated by the circuit 14 when the level of the voice is constant for a certain time. When an incoming arrives during the queuing time, the ringing tone is detected by the ringing tone and busy tone detecting circuit 21. Then the relay 15 is actuated by the circuit 14.
JP55021849A 1980-02-22 1980-02-22 Mobile tower telephone Expired JPS5920208B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55021849A JPS5920208B2 (en) 1980-02-22 1980-02-22 Mobile tower telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55021849A JPS5920208B2 (en) 1980-02-22 1980-02-22 Mobile tower telephone

Publications (2)

Publication Number Publication Date
JPS56117445A true JPS56117445A (en) 1981-09-14
JPS5920208B2 JPS5920208B2 (en) 1984-05-11

Family

ID=12066540

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55021849A Expired JPS5920208B2 (en) 1980-02-22 1980-02-22 Mobile tower telephone

Country Status (1)

Country Link
JP (1) JPS5920208B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63160426A (en) * 1986-12-23 1988-07-04 Matsushita Electric Works Ltd Cordless interphone

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205409A (en) * 1984-03-29 1985-10-17 Nippon Kogaku Kk <Nikon> Automatic focus adjusting adapter for interchangeable lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63160426A (en) * 1986-12-23 1988-07-04 Matsushita Electric Works Ltd Cordless interphone
JP2655259B2 (en) * 1986-12-23 1997-09-17 松下電工株式会社 Cordless intercom

Also Published As

Publication number Publication date
JPS5920208B2 (en) 1984-05-11

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