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FR774586A - auxiliary equipment for telephone devices - Google Patents

auxiliary equipment for telephone devices

Info

Publication number
FR774586A
FR774586A FR774586DA FR774586A FR 774586 A FR774586 A FR 774586A FR 774586D A FR774586D A FR 774586DA FR 774586 A FR774586 A FR 774586A
Authority
FR
France
Prior art keywords
auxiliary equipment
telephone devices
telephone
devices
auxiliary
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.)
Expired
Application number
Other languages
French (fr)
Inventor
Hans Clemens Schmidt
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 filed Critical
Application granted granted Critical
Publication of FR774586A publication Critical patent/FR774586A/en
Expired 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
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party
    • H04M1/652—Means for playing back the recorded messages by remote control over a telephone line
    • 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)
FR774586D 1932-08-24 1933-08-24 auxiliary equipment for telephone devices Expired FR774586A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE774586X 1932-08-24

Publications (1)

Publication Number Publication Date
FR774586A true FR774586A (en) 1934-12-08

Family

ID=6686103

Family Applications (1)

Application Number Title Priority Date Filing Date
FR774586D Expired FR774586A (en) 1932-08-24 1933-08-24 auxiliary equipment for telephone devices

Country Status (1)

Country Link
FR (1) FR774586A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036323B (en) * 1955-05-05 1958-08-14 Matthijs Leonardus Michel Soug Device for the amplification of speech signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036323B (en) * 1955-05-05 1958-08-14 Matthijs Leonardus Michel Soug Device for the amplification of speech signals

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