FI750726A - - Google Patents

Info

Publication number
FI750726A
FI750726A FI750726A FI750726A FI750726A FI 750726 A FI750726 A FI 750726A FI 750726 A FI750726 A FI 750726A FI 750726 A FI750726 A FI 750726A FI 750726 A FI750726 A FI 750726A
Authority
FI
Finland
Application number
FI750726A
Other languages
Finnish (fi)
Inventor
Lars Erik Jakobsson
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
Publication of FI750726A publication Critical patent/FI750726A/fi

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)
FI750726A 1974-03-29 1975-03-13 FI750726A (sv)

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
FI750726A true FI750726A (sv) 1975-09-30

Family

ID=20320685

Family Applications (1)

Application Number Title Priority Date Filing Date
FI750726A FI750726A (sv) 1974-03-29 1975-03-13

Country Status (10)

Country Link
US (1) US3980837A (sv)
CA (1) CA1007776A (sv)
CH (1) CH583490A5 (sv)
DK (1) DK139498B (sv)
FI (1) FI750726A (sv)
FR (1) FR2266391B1 (sv)
GB (1) GB1501235A (sv)
IT (1) IT1034753B (sv)
NO (1) NO136776C (sv)
SE (1) SE386341B (sv)

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
DE2946306C2 (de) * 1979-11-16 1987-02-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verstärkerschaltung mit vorgebbarem 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
WO1988008234A1 (en) * 1987-04-09 1988-10-20 Standard Telephones And Cables Pty. Ltd. 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 (sv) * 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
FR2266391B1 (sv) 1979-03-16
DK134375A (sv) 1975-09-30
FR2266391A1 (sv) 1975-10-24
NO136776B (sv) 1977-07-25
CA1007776A (en) 1977-03-29
DK139498C (sv) 1979-08-06
GB1501235A (en) 1978-02-15
CH583490A5 (sv) 1976-12-31
NO751089L (sv) 1975-09-30
SE7404278L (sv) 1975-09-30
SE386341B (sv) 1976-08-02
US3980837A (en) 1976-09-14
NO136776C (no) 1977-11-02
DK139498B (da) 1979-02-26
IT1034753B (it) 1979-10-10

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Legal Events

Date Code Title Description
FA Application withdrawn

Owner name: OY L M ERICSSON AB