AT299334B - Circuit arrangement for loudspeaker stations - Google Patents

Circuit arrangement for loudspeaker stations

Info

Publication number
AT299334B
AT299334B AT1180469A AT1180469A AT299334B AT 299334 B AT299334 B AT 299334B AT 1180469 A AT1180469 A AT 1180469A AT 1180469 A AT1180469 A AT 1180469A AT 299334 B AT299334 B AT 299334B
Authority
AT
Austria
Prior art keywords
circuit arrangement
loudspeaker stations
loudspeaker
stations
arrangement
Prior art date
Application number
AT1180469A
Other languages
German (de)
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
Application granted granted Critical
Publication of AT299334B publication Critical patent/AT299334B/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)
  • Control Of Amplification And Gain Control (AREA)
  • Telephonic Communication Services (AREA)
  • Mobile Radio Communication Systems (AREA)
AT1180469A 1968-12-20 1969-12-18 Circuit arrangement for loudspeaker stations AT299334B (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
AT299334B true AT299334B (en) 1972-06-12

Family

ID=5716962

Family Applications (1)

Application Number Title Priority Date Filing Date
AT1180469A AT299334B (en) 1968-12-20 1969-12-18 Circuit arrangement for loudspeaker stations

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
GB1228117A (en) 1971-04-15
NL149661B (en) 1976-05-17
NL6918526A (en) 1970-06-23
FR2026658A1 (en) 1970-09-18
BE743453A (en) 1970-06-19
CH502731A (en) 1971-01-31
DE1816146A1 (en) 1970-07-02
SE345362B (en) 1972-05-23
DE1816146B2 (en) 1972-02-10
LU60045A1 (en) 1970-02-18

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee