CH502731A - Circuit arrangement for a loudspeaker station - Google Patents

Circuit arrangement for a loudspeaker station

Info

Publication number
CH502731A
CH502731A CH1869569A CH1869569A CH502731A CH 502731 A CH502731 A CH 502731A CH 1869569 A CH1869569 A CH 1869569A CH 1869569 A CH1869569 A CH 1869569A CH 502731 A CH502731 A CH 502731A
Authority
CH
Switzerland
Prior art keywords
circuit arrangement
loudspeaker station
loudspeaker
station
arrangement
Prior art date
Application number
CH1869569A
Other languages
German (de)
Inventor
Schoen Siegfried
Plotzitzka Horst
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of CH502731A publication Critical patent/CH502731A/en

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)
  • Control Of Amplification And Gain Control (AREA)
  • Telephonic Communication Services (AREA)
CH1869569A 1968-12-20 1969-12-16 Circuit arrangement for a loudspeaker station CH502731A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681816146 DE1816146B2 (en) 1968-12-20 1968-12-20 CIRCUIT ARRANGEMENT FOR LOUD TELEPHONE STATIONS

Publications (1)

Publication Number Publication Date
CH502731A true CH502731A (en) 1971-01-31

Family

ID=5716962

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1869569A CH502731A (en) 1968-12-20 1969-12-16 Circuit arrangement for a loudspeaker station

Country Status (9)

Country Link
AT (1) AT299334B (en)
BE (1) BE743453A (en)
CH (1) CH502731A (en)
DE (1) DE1816146B2 (en)
FR (1) FR2026658A1 (en)
GB (1) GB1228117A (en)
LU (1) LU60045A1 (en)
NL (1) NL149661B (en)
SE (1) SE345362B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460575A1 (en) * 1979-06-29 1981-01-23 Trt Telecom Radio Electr Telephone set having earpiece amplifier - whose gain can be preset by user by dialling selected code using phone dial or pushbutton keyboard
DE2937638C2 (en) * 1979-09-18 1981-11-26 Krone Gmbh, 1000 Berlin Non-latching button as an on / off switch and for volume adjustment
US4497980A (en) * 1983-06-16 1985-02-05 Itt Corporation Handsfree circuit for telephone instrument

Also Published As

Publication number Publication date
AT299334B (en) 1972-06-12
NL6918526A (en) 1970-06-23
LU60045A1 (en) 1970-02-18
SE345362B (en) 1972-05-23
GB1228117A (en) 1971-04-15
FR2026658A1 (en) 1970-09-18
NL149661B (en) 1976-05-17
BE743453A (en) 1970-06-19
DE1816146B2 (en) 1972-02-10
DE1816146A1 (en) 1970-07-02

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Legal Events

Date Code Title Description
PL Patent ceased