NL274038A - - Google Patents

Info

Publication number
NL274038A
NL274038A NL274038DA NL274038A NL 274038 A NL274038 A NL 274038A NL 274038D A NL274038D A NL 274038DA NL 274038 A NL274038 A NL 274038A
Authority
NL
Netherlands
Application number
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.)
Publication of NL274038A publication Critical patent/NL274038A/xx

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
    • H04M1/654—Telephone line monitoring circuits therefor, e.g. ring detectors

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
NL274038D 1962-01-18 NL274038A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB65557A DE1172735B (de) 1962-01-18 1962-01-18 Schaltungsanordnung zur Abschaltung sprachaufzeichnender Geraete, wie Telefonanrufbeantworter

Publications (1)

Publication Number Publication Date
NL274038A true NL274038A (xx)

Family

ID=6974822

Family Applications (1)

Application Number Title Priority Date Filing Date
NL274038D NL274038A (xx) 1962-01-18

Country Status (2)

Country Link
DE (1) DE1172735B (xx)
NL (1) NL274038A (xx)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE838774C (de) * 1950-01-06 1952-06-23 Telefonbau & Normalzeit Gmbh Schaltungsanordnung fuer Tonfrequenzwahl in Fernsprechanlagen
DE939820C (de) * 1952-05-06 1956-03-01 Siemens Ag Schaltungsanordnung zum Empfang von Spannungen einer oder mehrerer Signalfrequenzen
NL235239A (xx) * 1959-01-19

Also Published As

Publication number Publication date
DE1172735B (de) 1964-06-25

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