IT7923377A0 - Circuito di comando della corrente dei doppini di utenti telefonici. - Google Patents

Circuito di comando della corrente dei doppini di utenti telefonici.

Info

Publication number
IT7923377A0
IT7923377A0 IT7923377A IT2337779A IT7923377A0 IT 7923377 A0 IT7923377 A0 IT 7923377A0 IT 7923377 A IT7923377 A IT 7923377A IT 2337779 A IT2337779 A IT 2337779A IT 7923377 A0 IT7923377 A0 IT 7923377A0
Authority
IT
Italy
Prior art keywords
cables
current
control circuit
telephone users
telephone
Prior art date
Application number
IT7923377A
Other languages
English (en)
Other versions
IT1121333B (it
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 IT7923377A0 publication Critical patent/IT7923377A0/it
Application granted granted Critical
Publication of IT1121333B publication Critical patent/IT1121333B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/008—Using DC/DC converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
IT23377/79A 1978-06-15 1979-06-08 Circuito di comando della corrente dei doppini di utenti telefonici IT1121333B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/915,634 US4197432A (en) 1978-06-15 1978-06-15 Telephone subscriber's loop power control circuit

Publications (2)

Publication Number Publication Date
IT7923377A0 true IT7923377A0 (it) 1979-06-08
IT1121333B IT1121333B (it) 1986-04-02

Family

ID=25436038

Family Applications (1)

Application Number Title Priority Date Filing Date
IT23377/79A IT1121333B (it) 1978-06-15 1979-06-08 Circuito di comando della corrente dei doppini di utenti telefonici

Country Status (4)

Country Link
US (1) US4197432A (it)
BE (1) BE876181A (it)
CA (1) CA1116330A (it)
IT (1) IT1121333B (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4393491A (en) * 1980-11-05 1983-07-12 Anaconda-Ericsson Automatic self-test system for a digital multiplexed telecommunication system
US4361731A (en) * 1981-02-13 1982-11-30 Bell Telephone Laboratories, Incorporated Coin telephone control circuit
US4410982A (en) * 1981-05-07 1983-10-18 Gte Automatic Electric Labs. Inc. Arrangement for extending digital signaling to telephone subscribers' substations
FR2519218A1 (fr) * 1981-12-24 1983-07-01 Telecommunications Sa Procede et dispositif d'alimentation d'une regie d'abonne
NL8202812A (nl) * 1982-07-12 1984-02-01 Philips Nv Voedingsinrichting voor het toevoeren van gelijkstroom aan abonneecircuits.
ES2100803B1 (es) * 1994-05-20 1998-04-16 Telefonica Nacional Espana Co Circuito integrado de actuacion y exploracion doble.
KR0168529B1 (ko) * 1996-02-12 1999-02-01 김광호 간이 교환장치의 정전시 메모리 보존 회로
JP3145942B2 (ja) * 1997-02-18 2001-03-12 日本電気株式会社 電源システム
US20060072740A1 (en) * 2004-09-30 2006-04-06 Tesu Ion C Selective analog signal sensing from a plurality of integrated circuits using a common node

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848094A (en) * 1972-12-29 1974-11-12 Stromberg Carlson Corp Telephone battery feed circuit
GB1563802A (en) * 1975-11-10 1980-04-02 Post Office Electronic current feed circuit
US4087647A (en) * 1977-05-25 1978-05-02 Bell Telephone Laboratories, Incorporated Circuit for supplying direct current to telephone station sets

Also Published As

Publication number Publication date
US4197432A (en) 1980-04-08
BE876181A (fr) 1979-09-03
CA1116330A (en) 1982-01-12
IT1121333B (it) 1986-04-02

Similar Documents

Publication Publication Date Title
IT7941624A0 (it) Interruttore di circuito di limitazione di corrente.
NL170071C (nl) Elektrische klemmenlijst.
PL214441A1 (pl) Przelacznik elektryczny
NL170477C (nl) Elektrische klemmenlijst.
DK284877A (da) Hermetisk ventilationsorgan til elektriske apparater
NL7806961A (nl) Elektrische midden- of hoogspanningskabel.
AR211824A1 (es) Terminal de conexion electrica
IT7923377A0 (it) Circuito di comando della corrente dei doppini di utenti telefonici.
NO764399L (no) Elektrisk reguleringsapparat.
IT7821634A0 (it) Circuito elettrico.
IT7923518A0 (it) Dispositivo limitatore di corrente.
BR7807581A (pt) Aparelho limitador da corrente
NO790584L (no) Elektrisk bryter.
NL7803607A (nl) Spanningsreferentieschakeling.
NO790585L (no) Elektrisk bryter.
NO783289L (no) Elektriske kabler.
ES244661Y (es) Dispositivo de conexion electrica.
PL213481A1 (pl) Przelacznik elektryczny
NL7901021A (nl) Elektrisch onderdeel.
NO790663L (no) Elektrisk bryter.
IT7923208V0 (it) Terminale elettrico.
IT7819136A0 (it) Commutatori elettrici.
NO772433L (no) Sterkstroemkabel.
SE7802165L (sv) Elektrisk styrkoppling
NO790797L (no) Elektrisk isoleringsanordning.