[go: up one dir, main page]

IT1149225B - Disposizione circuitale per utenti duplex in centrali di commutazione telefonica di tipo elettronico - Google Patents

Disposizione circuitale per utenti duplex in centrali di commutazione telefonica di tipo elettronico

Info

Publication number
IT1149225B
IT1149225B IT25213/80A IT2521380A IT1149225B IT 1149225 B IT1149225 B IT 1149225B IT 25213/80 A IT25213/80 A IT 25213/80A IT 2521380 A IT2521380 A IT 2521380A IT 1149225 B IT1149225 B IT 1149225B
Authority
IT
Italy
Prior art keywords
circuitive
arrangement
switching units
telephone switching
electronic telephone
Prior art date
Application number
IT25213/80A
Other languages
English (en)
Other versions
IT8025213A0 (it
Inventor
Ennio Bonaparte
Virgilio Mosca
Original Assignee
Italtel Spa
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 Italtel Spa filed Critical Italtel Spa
Priority to IT25213/80A priority Critical patent/IT1149225B/it
Publication of IT8025213A0 publication Critical patent/IT8025213A0/it
Priority to US06/309,479 priority patent/US4435619A/en
Priority to FR8119022A priority patent/FR2492206A1/fr
Priority to DE19813140182 priority patent/DE3140182A1/de
Priority to BR8106570A priority patent/BR8106570A/pt
Application granted granted Critical
Publication of IT1149225B publication Critical patent/IT1149225B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/24—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange for two-party-line systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
IT25213/80A 1980-10-09 1980-10-09 Disposizione circuitale per utenti duplex in centrali di commutazione telefonica di tipo elettronico IT1149225B (it)

Priority Applications (5)

Application Number Priority Date Filing Date Title
IT25213/80A IT1149225B (it) 1980-10-09 1980-10-09 Disposizione circuitale per utenti duplex in centrali di commutazione telefonica di tipo elettronico
US06/309,479 US4435619A (en) 1980-10-09 1981-10-07 Switching network interfacing telephone-exchange equipment with two-subscriber party line
FR8119022A FR2492206A1 (fr) 1980-10-09 1981-10-09 Disposition de circuit pour usagers duplex dans des centres de commutation telephonique du type electronique
DE19813140182 DE3140182A1 (de) 1980-10-09 1981-10-09 "schaltungsanordnung fuer ueber eine zweieranschlusseinrichtung an eine fernsprechvermittlungsstelle angeschlossene teilnehmer"
BR8106570A BR8106570A (pt) 1980-10-09 1981-10-09 Disposicao de circuito

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT25213/80A IT1149225B (it) 1980-10-09 1980-10-09 Disposizione circuitale per utenti duplex in centrali di commutazione telefonica di tipo elettronico

Publications (2)

Publication Number Publication Date
IT8025213A0 IT8025213A0 (it) 1980-10-09
IT1149225B true IT1149225B (it) 1986-12-03

Family

ID=11216022

Family Applications (1)

Application Number Title Priority Date Filing Date
IT25213/80A IT1149225B (it) 1980-10-09 1980-10-09 Disposizione circuitale per utenti duplex in centrali di commutazione telefonica di tipo elettronico

Country Status (5)

Country Link
US (1) US4435619A (it)
BR (1) BR8106570A (it)
DE (1) DE3140182A1 (it)
FR (1) FR2492206A1 (it)
IT (1) IT1149225B (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3517088C1 (de) * 1985-05-11 1986-09-04 Neumann Elektronik GmbH, 4330 Mülheim Einrichtung an einem Fernsprech-Teilnehmeranschluss zur Abschaltung einer von zwei wechselweise automatisch anschaltbaren Sprechstellen von der Vermittlungsstelle aus bei ungewolltem Schleifenanschluss in dieser Sprechstelle
DE3532960C1 (de) * 1985-09-16 1987-02-05 Neumann Elektronik Gmbh Einrichtung an einem Fernsprech-Teilnehmeranschluss mit zwei wechselweise automatisch anschaltbaren Sprechstellen zur Abschaltung einer,einen ungewollten Schleifenschluss aufweisenden Sprechstelle von der Vermittlungsstelle aus
US5245654A (en) * 1991-10-10 1993-09-14 Cermetek Microelectronics, Inc. Solid state isolation device using opto-isolators

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE756800A (fr) * 1969-09-29 1971-03-29 Siemens Ag Montage pour installations de telecommunications a commande centrale, plus particulierement pour installations telephoniques a branchement double
DE1950427B2 (de) * 1969-10-07 1976-12-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltungsanordnung fuer zweieranschluesse in fernmelde-, insbesondere fernsprechanlagen
DE2147732C3 (de) * 1971-09-24 1978-10-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltungsanordnung zum Prüfen der Teilnehmeranschlußleitungen in Fernmelde- insbesondere Fernsprechanlagen mit jeweils zwei über eine gemeinsame Anschlußleitung angeschlossenen Teilnehmerstellen
AT336090B (de) * 1974-09-20 1977-04-12 Kapsch Telephon Telegraph Gesellschaftsanschluss

Also Published As

Publication number Publication date
BR8106570A (pt) 1982-06-29
DE3140182A1 (de) 1982-06-09
FR2492206A1 (fr) 1982-04-16
US4435619A (en) 1984-03-06
FR2492206B3 (it) 1983-07-29
IT8025213A0 (it) 1980-10-09

Similar Documents

Publication Publication Date Title
GB2134749B (en) Telephone call cost calculator
GB2107554B (en) Telephone line circuit
IT1214371B (it) Dispositivo di commutazione elettronica
GB2122454B (en) Loudspeaking telephone
IT1138554B (it) Dispositivo elettronico di commutazione,di tipo analogico
JPS56158592A (en) Telephone set circuit netword
DK63281A (da) Telefonkredsloeb
GB2091066B (en) Electronic key telephone set
EP0102111A3 (en) Telephone circuit
GB2068613B (en) Acoustically operable electrical switching circuits
IT1149225B (it) Disposizione circuitale per utenti duplex in centrali di commutazione telefonica di tipo elettronico
DE3379859D1 (en) Telephone circuit
ZA816703B (en) Telephone subscriber connection circuits
ES543466A0 (es) Perfeccionamientos en los circuitos telefonicos
IT1211024B (it) Circuito conferenza per centrali telefoniche di commutazione di tipo numerico.
ES503476A0 (es) Perfeccionamientos en instalaciones conmutadoras telefonicasde gobierno central
IT8312538A0 (it) Ricevitore supplementare per apparecchi telefonici
GB2122843B (en) Telephone interface unit
IT1192941B (it) Interruttore elettronico per linea telefonica
IT8211909V0 (it) Interruttore elettronico per linea telefonica
AU88351S (en) Key telephone set
CA49730S (en) Telephone set with keyboard
KR840002490U (ko) 전화 송수화기
CA49548S (en) Telephone index
JPS5764067A (en) Electronic desk type calculator