BE884369A - Circuit de clavier d'appel a impulsions reglees par le courant - Google Patents

Circuit de clavier d'appel a impulsions reglees par le courant

Info

Publication number
BE884369A
BE884369A BE2/58657A BE2058657A BE884369A BE 884369 A BE884369 A BE 884369A BE 2/58657 A BE2/58657 A BE 2/58657A BE 2058657 A BE2058657 A BE 2058657A BE 884369 A BE884369 A BE 884369A
Authority
BE
Belgium
Prior art keywords
current
keyboard circuit
controlled pulse
call keyboard
pulse call
Prior art date
Application number
BE2/58657A
Other languages
English (en)
Inventor
J D Sublette
Original Assignee
Gte Automatic Electric Lab Inc
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 Gte Automatic Electric Lab Inc filed Critical Gte Automatic Electric Lab Inc
Publication of BE884369A publication Critical patent/BE884369A/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
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
BE2/58657A 1979-10-15 1980-07-18 Circuit de clavier d'appel a impulsions reglees par le courant BE884369A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/084,960 US4286120A (en) 1979-10-15 1979-10-15 Current regulated pulse dialer circuit

Publications (1)

Publication Number Publication Date
BE884369A true BE884369A (fr) 1980-11-17

Family

ID=22188299

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2/58657A BE884369A (fr) 1979-10-15 1980-07-18 Circuit de clavier d'appel a impulsions reglees par le courant

Country Status (4)

Country Link
US (1) US4286120A (fr)
BE (1) BE884369A (fr)
CA (1) CA1145495A (fr)
IT (1) IT1133865B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8103419A (nl) * 1981-04-01 1982-11-01 Philips Nv Lijntestcircuit voor een abonneetelefoontoestel.
FR2518858A1 (fr) * 1981-12-23 1983-06-24 Jeumont Schneider Dispositif de transmission de signaux sur une ligne assurant egalement une alimentation en tension continue
US4413159A (en) * 1982-04-02 1983-11-01 Bell Telephone Laboratories, Incorporated Dial pulsing circuit
AU622744B2 (en) * 1989-02-02 1992-04-16 Alcatel Australia Limited Dialler chip mode signal
DE4009954A1 (de) * 1990-03-28 1991-10-10 Siemens Ag Schaltungsanordnung fuer eine eingangs- und stromversorgungsschaltung fuer digitale fernsprechendgeraete
US5216710A (en) * 1991-01-07 1993-06-01 Winbond Electronics Corp. Liquid crystal display driver and power supply
JPH04349761A (ja) * 1991-05-28 1992-12-04 Canon Inc 通信装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE363948B (fr) * 1973-03-05 1974-02-04 Ericsson Telefon Ab L M
GB1480341A (en) * 1973-10-25 1977-07-20 Gen Electric Co Ltd Electric impulse transmitters for telephone instruments
GB1515503A (en) * 1974-01-15 1978-06-28 Gen Electric Co Ltd Electric impulse transmitters for telephone instruments
SE386341B (sv) * 1974-03-29 1976-08-02 Ericsson Telefon Ab L M Kopplingsanordning vid en telefonapparat innefattande en likspenningsomvandlare.
DE2522957C3 (de) * 1975-05-23 1978-06-15 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung für über ihre Anschlußleitungen gespeiste Teilnehmerstationen mit Impulstastwahl in Fernmelde-, insbesondere Fernsprechanlagen
DE2541903C3 (de) * 1975-09-19 1979-09-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung für über ihre AnschluBleitiuigen gespeiste Teilnehmerstationen mit Impulstastwahl in Fernmelde-, insbesondere Fernsprechanlagen
US4167655A (en) * 1977-10-17 1979-09-11 United Networks Inc. Push button to rotary dial converter systems

Also Published As

Publication number Publication date
US4286120A (en) 1981-08-25
IT8025268A0 (it) 1980-10-13
CA1145495A (fr) 1983-04-26
IT1133865B (it) 1986-07-24

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: GTE AUTOMATIC ELECTRIC LABORATORIES INC.

Effective date: 19890731