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BE815522A - Circuit d'adaptation de lignes destine a un appareil telephonique a boutons-poussoirs muni d'un generateur de son - Google Patents

Circuit d'adaptation de lignes destine a un appareil telephonique a boutons-poussoirs muni d'un generateur de son

Info

Publication number
BE815522A
BE815522A BE144739A BE144739A BE815522A BE 815522 A BE815522 A BE 815522A BE 144739 A BE144739 A BE 144739A BE 144739 A BE144739 A BE 144739A BE 815522 A BE815522 A BE 815522A
Authority
BE
Belgium
Prior art keywords
push
telephone device
sound generator
adaptation circuit
circuit intended
Prior art date
Application number
BE144739A
Other languages
English (en)
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
Publication of BE815522A publication Critical patent/BE815522A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE144739A 1973-05-25 1974-05-24 Circuit d'adaptation de lignes destine a un appareil telephonique a boutons-poussoirs muni d'un generateur de son BE815522A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7307296A NL7307296A (fr) 1973-05-25 1973-05-25

Publications (1)

Publication Number Publication Date
BE815522A true BE815522A (fr) 1974-11-25

Family

ID=19818945

Family Applications (1)

Application Number Title Priority Date Filing Date
BE144739A BE815522A (fr) 1973-05-25 1974-05-24 Circuit d'adaptation de lignes destine a un appareil telephonique a boutons-poussoirs muni d'un generateur de son

Country Status (11)

Country Link
US (1) US3982078A (fr)
JP (1) JPS5022507A (fr)
BE (1) BE815522A (fr)
CA (1) CA997079A (fr)
DE (1) DE2424335A1 (fr)
DK (1) DK280374A (fr)
ES (1) ES426575A1 (fr)
FR (1) FR2231167A1 (fr)
GB (1) GB1438263A (fr)
IT (1) IT1012756B (fr)
NL (1) NL7307296A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2034555B (en) * 1978-11-08 1983-03-02 Standard Telephones Cables Ltd Bridge amplifier
JPS5973510A (ja) * 1982-10-19 1984-04-25 Pola Chem Ind Inc 化粧料
US5172410A (en) * 1990-04-26 1992-12-15 Sound Control Technologies, Inc. Conference telephone system and method
JPH0561237A (ja) * 1991-05-30 1993-03-12 Fuji Xerox Co Ltd マイクロカプセルおよびその製造方法
JPH05142847A (ja) * 1991-11-15 1993-06-11 Fuji Xerox Co Ltd マイクロカプセルおよびマイクロカプセルトナー並びにそ の製造法
JP2800558B2 (ja) * 1992-04-22 1998-09-21 富士ゼロックス株式会社 静電荷像現像用マイクロカプセルトナーおよびマイクロカプセルの形成法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA915763A (en) * 1971-05-28 1972-11-28 C. J. Cowpland Michael Impedance matching circuit for driving a tone ringer or the like
BE792329A (fr) * 1971-12-09 1973-06-06 Int Standard Electric Corp Circuit de transmission electronique pour poste telephonique

Also Published As

Publication number Publication date
ES426575A1 (es) 1976-09-01
JPS5022507A (fr) 1975-03-11
FR2231167A1 (fr) 1974-12-20
CA997079A (en) 1976-09-14
NL7307296A (fr) 1974-11-27
US3982078A (en) 1976-09-21
DK280374A (fr) 1975-01-20
DE2424335A1 (de) 1974-12-19
GB1438263A (en) 1976-06-03
IT1012756B (it) 1977-03-10
USB472284I5 (fr) 1976-01-13

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