IT1173661B - Circuito per la produzione di impulsi di chiamata telefonica - Google Patents

Circuito per la produzione di impulsi di chiamata telefonica

Info

Publication number
IT1173661B
IT1173661B IT20418/83A IT2041883A IT1173661B IT 1173661 B IT1173661 B IT 1173661B IT 20418/83 A IT20418/83 A IT 20418/83A IT 2041883 A IT2041883 A IT 2041883A IT 1173661 B IT1173661 B IT 1173661B
Authority
IT
Italy
Prior art keywords
production
circuit
telephone call
impulses
call impulses
Prior art date
Application number
IT20418/83A
Other languages
English (en)
Other versions
IT8320418A0 (it
Inventor
Donald Dean Huizinga
Donald Richard Means
Edward William Underhill
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of IT8320418A0 publication Critical patent/IT8320418A0/it
Application granted granted Critical
Publication of IT1173661B publication Critical patent/IT1173661B/it

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)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
IT20418/83A 1982-04-02 1983-03-31 Circuito per la produzione di impulsi di chiamata telefonica IT1173661B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/364,752 US4413159A (en) 1982-04-02 1982-04-02 Dial pulsing circuit

Publications (2)

Publication Number Publication Date
IT8320418A0 IT8320418A0 (it) 1983-03-31
IT1173661B true IT1173661B (it) 1987-06-24

Family

ID=23435924

Family Applications (1)

Application Number Title Priority Date Filing Date
IT20418/83A IT1173661B (it) 1982-04-02 1983-03-31 Circuito per la produzione di impulsi di chiamata telefonica

Country Status (9)

Country Link
US (1) US4413159A (it)
EP (1) EP0105336B1 (it)
AU (1) AU1293283A (it)
CA (1) CA1190679A (it)
DE (1) DE3364482D1 (it)
ES (1) ES521112A0 (it)
GB (1) GB2117999B (it)
IT (1) IT1173661B (it)
WO (1) WO1983003508A1 (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4555597A (en) * 1983-12-05 1985-11-26 Gte Business Communication Systems Inc. Transient resistant key operated pulse generating calling device circuit
JPH0795773B2 (ja) * 1985-07-18 1995-10-11 アルカテル・エヌ・ブイ 電話機ラインスイッチ
US4675902A (en) * 1985-09-23 1987-06-23 Gte Communication Systems, Inc. High performance telephone instrument with combination pulse and tone dialing capacity
NL8601773A (nl) * 1986-07-08 1988-02-01 Philips Nv Telefoontoestel voorzien van een pulskeuzecircuit met een schakeltransistor met een met de lijnstroom meelopende basisstroom.
EP0318974A3 (de) * 1987-12-03 1991-04-03 Siemens Aktiengesellschaft Schaltungsanordnung für einen elektronischen NSI-Kontakt in einer Fernsprechstation

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT977993B (it) * 1973-01-03 1974-09-20 Sits Soc It Telecom Siemens Tastiera di selezione elettroni ca per apparecchi telefonici con emissione di impulsi decadici intercambiabile con il disco com binatore
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.
US4008379A (en) * 1975-02-14 1977-02-15 San/Bar Corporation Touch-pad to dial conversion unit
US4167655A (en) * 1977-10-17 1979-09-11 United Networks Inc. Push button to rotary dial converter systems
IT1202931B (it) * 1979-06-05 1989-02-15 Sits Soc It Telecom Siemens Circuito di interfaccia per tastiera elettronica con ripetizione della selezione
US4286120A (en) * 1979-10-15 1981-08-25 Gte Automatic Electric Labs Inc. Current regulated pulse dialer circuit
NL8001136A (nl) * 1980-02-26 1981-09-16 Philips Nv Schakeling voor toepassing in een telefoontoestel.

Also Published As

Publication number Publication date
GB2117999B (en) 1985-11-06
GB8307540D0 (en) 1983-04-27
AU1293283A (en) 1983-10-06
CA1190679A (en) 1985-07-16
ES8403680A1 (es) 1984-04-01
GB2117999A (en) 1983-10-19
ES521112A0 (es) 1984-04-01
US4413159A (en) 1983-11-01
EP0105336B1 (en) 1986-07-16
EP0105336A1 (en) 1984-04-18
DE3364482D1 (en) 1986-08-21
WO1983003508A1 (en) 1983-10-13
IT8320418A0 (it) 1983-03-31

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