CH579335A5 - - Google Patents

Info

Publication number
CH579335A5
CH579335A5 CH145075A CH145075A CH579335A5 CH 579335 A5 CH579335 A5 CH 579335A5 CH 145075 A CH145075 A CH 145075A CH 145075 A CH145075 A CH 145075A CH 579335 A5 CH579335 A5 CH 579335A5
Authority
CH
Switzerland
Application number
CH145075A
Original Assignee
Sits Soc It Telecom Siemens
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 Sits Soc It Telecom Siemens filed Critical Sits Soc It Telecom Siemens
Publication of CH579335A5 publication Critical patent/CH579335A5/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits
    • H04M1/585—Anti-side-tone circuits implemented without inductive element

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
CH145075A 1974-03-21 1975-02-06 CH579335A5 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT67890/74A IT1024529B (it) 1974-03-21 1974-03-21 Forchetta telefonica simmetrica

Publications (1)

Publication Number Publication Date
CH579335A5 true CH579335A5 (it) 1976-08-31

Family

ID=11306120

Family Applications (1)

Application Number Title Priority Date Filing Date
CH145075A CH579335A5 (it) 1974-03-21 1975-02-06

Country Status (6)

Country Link
US (1) US3987253A (it)
CA (1) CA1026477A (it)
CH (1) CH579335A5 (it)
DE (1) DE2512562B2 (it)
FR (1) FR2265233B1 (it)
IT (1) IT1024529B (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048647A (en) * 1976-09-10 1977-09-13 Northern Telecom Limited Solid state disconnect device
IT1110111B (it) * 1979-01-12 1985-12-23 Acet Srl Impianto citofonico a portiere elettrico a due fili,suscettibile di utilizzare un pressistente impianto a campanello,senza necessita' di ulteriori linee di alimentazione
DE3309822C2 (de) * 1983-03-18 1985-11-14 Siemens AG, 1000 Berlin und 8000 München Gabelschaltung für eine zentralgespeiste Teilnehmerstation
US4598396A (en) * 1984-04-03 1986-07-01 Itt Corporation Duplex transmission mechanism for digital telephones
JPH03296359A (ja) * 1990-04-16 1991-12-27 Fujitsu Ltd Ｉｓｄｎインタフェース回路

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3033940A (en) * 1960-09-09 1962-05-08 Itt Operator telephone circuit
US3440367A (en) * 1966-05-06 1969-04-22 Bell Telephone Labor Inc Nonreactive antisidetone network for a telephone set
DE1919111B1 (de) * 1969-04-15 1970-10-29 Siemens Ag Schaltungsanordnung fuer einen Transistorhoerverstaerker mit Daempfungsausgleich in Fernsprechteilnehmerstellen
GB1257878A (it) * 1970-04-10 1971-12-22

Also Published As

Publication number Publication date
FR2265233A1 (it) 1975-10-17
FR2265233B1 (it) 1979-04-27
DE2512562A1 (de) 1975-10-02
IT1024529B (it) 1978-07-20
CA1026477A (en) 1978-02-14
US3987253A (en) 1976-10-19
DE2512562B2 (de) 1980-04-24

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Legal Events

Date Code Title Description
PFA Name/firm changed

Owner name: ITALTEL S.P.A.

PL Patent ceased