IT1034753B - Generatore di impulsi per apparec chi telefonici - Google Patents

Generatore di impulsi per apparec chi telefonici

Info

Publication number
IT1034753B
IT1034753B IT21808/75A IT2180875A IT1034753B IT 1034753 B IT1034753 B IT 1034753B IT 21808/75 A IT21808/75 A IT 21808/75A IT 2180875 A IT2180875 A IT 2180875A IT 1034753 B IT1034753 B IT 1034753B
Authority
IT
Italy
Prior art keywords
pulse generator
telephone devices
telephone
devices
pulse
Prior art date
Application number
IT21808/75A
Other languages
English (en)
Italian (it)
Inventor
Erik Jakobsson Lars
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to DE7621008U priority Critical patent/DE7621008U1/de
Application granted granted Critical
Publication of IT1034753B publication Critical patent/IT1034753B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
    • 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)
  • Devices For Supply Of Signal Current (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
IT21808/75A 1974-03-29 1975-07-02 Generatore di impulsi per apparec chi telefonici IT1034753B (it)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE7621008U DE7621008U1 (de) 1975-07-02 1976-07-02 Tuer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7404278A SE386341B (sv) 1974-03-29 1974-03-29 Kopplingsanordning vid en telefonapparat innefattande en likspenningsomvandlare.

Publications (1)

Publication Number Publication Date
IT1034753B true IT1034753B (it) 1979-10-10

Family

ID=20320685

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21808/75A IT1034753B (it) 1974-03-29 1975-07-02 Generatore di impulsi per apparec chi telefonici

Country Status (10)

Country Link
US (1) US3980837A (US07902200-20110308-C00004.png)
CA (1) CA1007776A (US07902200-20110308-C00004.png)
CH (1) CH583490A5 (US07902200-20110308-C00004.png)
DK (1) DK139498B (US07902200-20110308-C00004.png)
FI (1) FI750726A (US07902200-20110308-C00004.png)
FR (1) FR2266391B1 (US07902200-20110308-C00004.png)
GB (1) GB1501235A (US07902200-20110308-C00004.png)
IT (1) IT1034753B (US07902200-20110308-C00004.png)
NO (1) NO136776C (US07902200-20110308-C00004.png)
SE (1) SE386341B (US07902200-20110308-C00004.png)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7608076L (sv) * 1975-07-25 1977-01-26 Carlo Baldoni Med tio siffror forsedd, digital nummertagare av tangenttyp
US4167655A (en) * 1977-10-17 1979-09-11 United Networks Inc. Push button to rotary dial converter systems
US4232200A (en) * 1978-10-23 1980-11-04 United Networks, Inc. Dialing system
IT1202931B (it) * 1979-06-05 1989-02-15 Sits Soc It Telecom Siemens Circuito di interfaccia per tastiera elettronica con ripetizione della selezione
DE2931456C2 (de) * 1979-08-02 1982-10-28 Siemens AG, 1000 Berlin und 8000 München Parallelregelschaltung
US4286120A (en) * 1979-10-15 1981-08-25 Gte Automatic Electric Labs Inc. Current regulated pulse dialer circuit
DE2946306A1 (de) * 1979-11-16 1981-05-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verstaerkerschaltung mit vogebbarem wechselstrominnenwiderstand
NL8001135A (nl) * 1980-02-26 1981-09-16 Philips Nv Lijnonderbrekingsinrichting.
FR2500691A1 (fr) * 1981-02-23 1982-08-27 Pays Gerard Cellule d'alimentation electrique a redressement et regulation, notamment pour sonneries electroniques
US4413159A (en) * 1982-04-02 1983-11-01 Bell Telephone Laboratories, Incorporated Dial pulsing circuit
FR2526252B1 (fr) * 1982-05-03 1986-12-19 Constr Telephoniques Circuit de commande du courant d'une ligne de transmission
DE3513625A1 (de) * 1985-04-16 1986-10-23 Nixdorf Computer Ag, 4790 Paderborn Schaltungsanordnung fuer die fernspeisung von teilnehmeranschluss-endgeraeten in fernmeldeanlagen
DE3628996A1 (de) * 1986-08-26 1988-03-10 Krone Ag Schaltungsanordnung fuer einen fernsprechapparat
AU606397B2 (en) * 1987-04-09 1991-02-07 Standard Telephones And Cables Pty. Limited Telephone subset circuit arrangement
DE3843083A1 (de) * 1988-12-21 1990-06-28 Siemens Ag Spannungsversorgung fuer den mikroprozessor einer leitungsgespeisten fernsprechstation
JP2002509683A (ja) * 1998-05-04 2002-03-26 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Ａｃ及びｄｃライン調整を有する電話線インタフェース回路
US7706526B2 (en) 2005-10-11 2010-04-27 Phylogy, Inc. Method and apparatus for powering electronics associated with a telephone line twisted pair

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1569618A (US07902200-20110308-C00004.png) * 1967-12-08 1969-06-06
GB1395577A (en) * 1972-05-11 1975-05-29 Standard Telephones Cables Ltd Telephones
US3787639A (en) * 1972-11-16 1974-01-22 Northern Electric Co Pushbutton electronic pulsing dial
US3881070A (en) * 1973-03-01 1975-04-29 Mel Tronix Lab Corp Train pulse generator

Also Published As

Publication number Publication date
DK134375A (US07902200-20110308-C00004.png) 1975-09-30
DK139498B (da) 1979-02-26
SE386341B (sv) 1976-08-02
NO136776B (US07902200-20110308-C00004.png) 1977-07-25
SE7404278L (US07902200-20110308-C00004.png) 1975-09-30
NO751089L (US07902200-20110308-C00004.png) 1975-09-30
GB1501235A (en) 1978-02-15
US3980837A (en) 1976-09-14
NO136776C (no) 1977-11-02
FR2266391B1 (US07902200-20110308-C00004.png) 1979-03-16
FI750726A (US07902200-20110308-C00004.png) 1975-09-30
DK139498C (US07902200-20110308-C00004.png) 1979-08-06
CA1007776A (en) 1977-03-29
CH583490A5 (US07902200-20110308-C00004.png) 1976-12-31
FR2266391A1 (US07902200-20110308-C00004.png) 1975-10-24

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