JPS5868329A - Switching device for receiving speech volume of car telephone set - Google Patents

Switching device for receiving speech volume of car telephone set

Info

Publication number
JPS5868329A
JPS5868329A JP56166138A JP16613881A JPS5868329A JP S5868329 A JPS5868329 A JP S5868329A JP 56166138 A JP56166138 A JP 56166138A JP 16613881 A JP16613881 A JP 16613881A JP S5868329 A JPS5868329 A JP S5868329A
Authority
JP
Japan
Prior art keywords
switch
hook
volume
amplifier
gain
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
JP56166138A
Other languages
Japanese (ja)
Inventor
Takaaki Kikuchi
Katsumi Kobayashi
Hitoshi Komagata
Akio Sasaki
Original Assignee
Nippon Telegr & Teleph Corp <Ntt>
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 Telegr & Teleph Corp <Ntt> filed Critical Nippon Telegr & Teleph Corp <Ntt>
Priority to JP56166138A priority Critical patent/JPS5868329A/en
Publication of JPS5868329A publication Critical patent/JPS5868329A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/02Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone, busy tone
    • H04M19/04Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone, busy tone ringing-current generated at substation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/02Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone, busy tone
    • H04M19/04Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone, busy tone ringing-current generated at substation
    • H04M19/042Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone, busy tone ringing-current generated at substation with variable loudness of the ringing tone, e.g. variable envelope or amplitude of ring signal

Abstract

PURPOSE:To make a reset to standard sound volume without reference to a last call by providing a car telephone set with a sound volume changeover switch which resets automatically after operation, and also setting a speech amplifier to a standard gain during the switching of a hook switch. CONSTITUTION:When a volume changeover switch 7 is operated with a handset 9 off the hook, a control circuit 4 detects the state and operation of a hook switch 6 and the switch 7 and sends a signal for an increase in gain to a receiving speech amplifier 3. On receiving the signal, the amplifier 3 increases the gain by 6 dB higher than a standard gain, thereby increasing receiving speech volume. The switch 7 is of a momentary type and returns to its original position, but the speech volume is held large to allow a telephone call in this state. When the handset 9 is put on the hook after the telephone call and then put off the hook again for another call, the circuit 4 detects the state of the switch 6 and performs control so that the amplifier 3 is set to the standard gain. Then, the switch 7 is operated to increase the speech volume.
JP56166138A 1981-10-17 1981-10-17 Switching device for receiving speech volume of car telephone set Pending JPS5868329A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56166138A JPS5868329A (en) 1981-10-17 1981-10-17 Switching device for receiving speech volume of car telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56166138A JPS5868329A (en) 1981-10-17 1981-10-17 Switching device for receiving speech volume of car telephone set

Publications (1)

Publication Number Publication Date
JPS5868329A true JPS5868329A (en) 1983-04-23

Family

ID=15825737

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56166138A Pending JPS5868329A (en) 1981-10-17 1981-10-17 Switching device for receiving speech volume of car telephone set

Country Status (1)

Country Link
JP (1) JPS5868329A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60124157U (en) * 1984-01-28 1985-08-21
JPS61354U (en) * 1984-06-05 1986-01-06
JPS6167390A (en) * 1984-09-11 1986-04-07 Matsushita Electric Ind Co Ltd Key telephone set
EP0277031A2 (en) * 1987-01-30 1988-08-03 Nec Corporation Volume control circuit for use in portable telephone or the like
EP0283853A2 (en) * 1987-03-21 1988-09-28 Aisin Seiki Kabushiki Kaisha A telephone system on a vehicle
JPS63280551A (en) * 1987-05-13 1988-11-17 Hitachi Ltd Talking sound volume adjusting system for telephone set
GB2433380A (en) * 2005-12-16 2007-06-20 Motorola Inc Volume adjustment of received speech according to identification of caller especially in dispatcher networks

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50133711A (en) * 1974-04-08 1975-10-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50133711A (en) * 1974-04-08 1975-10-23

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60124157U (en) * 1984-01-28 1985-08-21
JPS61354U (en) * 1984-06-05 1986-01-06
JPH0537571Y2 (en) * 1984-06-05 1993-09-22
JPS6167390A (en) * 1984-09-11 1986-04-07 Matsushita Electric Ind Co Ltd Key telephone set
EP0277031A2 (en) * 1987-01-30 1988-08-03 Nec Corporation Volume control circuit for use in portable telephone or the like
EP0283853A2 (en) * 1987-03-21 1988-09-28 Aisin Seiki Kabushiki Kaisha A telephone system on a vehicle
JPS63280551A (en) * 1987-05-13 1988-11-17 Hitachi Ltd Talking sound volume adjusting system for telephone set
GB2433380A (en) * 2005-12-16 2007-06-20 Motorola Inc Volume adjustment of received speech according to identification of caller especially in dispatcher networks
GB2433380B (en) * 2005-12-16 2008-03-26 Motorola Inc Communication terminal,system and method of operation

Similar Documents

Publication Publication Date Title
JPS6096951A (en) Outgoing trunk equipment with automatic dial
JPH02209055A (en) Telephone set
JPS60242738A (en) Cordless telephone set
JPS63233638A (en) Vehicle telephone system
JPS6348043A (en) Data communication equipment
JPH01295554A (en) Hand-free circuit and hand-free control system
JPS58107761A (en) Monitoring system for automatic answering device
JPH0278348A (en) Radio telephone set and its control method
JPH0344222A (en) Radiotelephony equipment
JPH01114246A (en) Sound recording telephone device with remote controlled change-over switch
JPH01269327A (en) Mobile telephone terminal unit with clearing processing function
JPH0243855A (en) Radio telephone set
JPS5923961A (en) Controller of plural terminals
JPS6382047A (en) Cordless telephone set
JPS6027270A (en) Absence receiving device of facsimile
JPH04223718A (en) Automobile communication center system
JPS62199155A (en) Communication equipment
JPS613536A (en) Echo signal canceller
JPS63299415A (en) Cordless telephone
JPS61123349A (en) Message regenerating device in automatic answering telephone set
JPS60130931A (en) Transmission output control of mobile radio communication equipment
JPS6363262A (en) Fasimile equipment with automatic answering telephone function
JPS58120371A (en) Facsimile device
JPH03166894A (en) Key telephone system
JPS54114011A (en) Loudspeaker telephone device