IE37045B1 - Telephone subscriber equipment - Google Patents

Telephone subscriber equipment

Info

Publication number
IE37045B1
IE37045B1 IE1420/72A IE142072A IE37045B1 IE 37045 B1 IE37045 B1 IE 37045B1 IE 1420/72 A IE1420/72 A IE 1420/72A IE 142072 A IE142072 A IE 142072A IE 37045 B1 IE37045 B1 IE 37045B1
Authority
IE
Ireland
Prior art keywords
amplifier
transistor
line
circuit
line current
Prior art date
Application number
IE1420/72A
Other languages
English (en)
Other versions
IE37045L (en
Original Assignee
Standard Telephones Cables Ltd
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 Standard Telephones Cables Ltd filed Critical Standard Telephones Cables Ltd
Publication of IE37045L publication Critical patent/IE37045L/xx
Publication of IE37045B1 publication Critical patent/IE37045B1/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)
  • Amplifiers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
IE1420/72A 1971-12-09 1972-10-19 Telephone subscriber equipment IE37045B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5719671 1971-12-09

Publications (2)

Publication Number Publication Date
IE37045L IE37045L (en) 1973-06-09
IE37045B1 true IE37045B1 (en) 1977-04-27

Family

ID=10478595

Family Applications (1)

Application Number Title Priority Date Filing Date
IE1420/72A IE37045B1 (en) 1971-12-09 1972-10-19 Telephone subscriber equipment

Country Status (11)

Country Link
US (1) US3823272A (enExample)
AU (1) AU473401B2 (enExample)
BE (1) BE792329A (enExample)
CA (1) CA972887A (enExample)
CH (1) CH557626A (enExample)
DE (1) DE2259993A1 (enExample)
ES (1) ES409421A1 (enExample)
FR (1) FR2164377A5 (enExample)
GB (1) GB1328917A (enExample)
IE (1) IE37045B1 (enExample)
ZA (1) ZA727502B (enExample)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1406663A (en) * 1972-08-22 1975-09-17 Standard Telephones Cables Ltd Telphone subset circuits
NL7307296A (enExample) * 1973-05-25 1974-11-27
US4031331A (en) * 1976-01-15 1977-06-21 Northern Electric Company Limited Telephone speech network
BE841105A (nl) * 1976-04-26 1976-10-26 Telekommunikatie toestel
JPS5356903A (en) * 1976-11-02 1978-05-23 Nippon Telegr & Teleph Corp <Ntt> Automatic level control circuit for telephone set
GB1546046A (en) * 1976-12-03 1979-05-16 Cselt Centro Studi Lab Telecom Transmitting and receiving circuit for subscriber telephone sets
US4071713A (en) * 1976-12-27 1978-01-31 Northern Telecom Limited Telephone speech network
JPS53105105A (en) * 1977-02-24 1978-09-13 San Terehon Kk Semiconductor telephone set
US4303805A (en) * 1979-05-21 1981-12-01 United Networks, Inc. Subscriber station network
US4400589A (en) * 1979-05-21 1983-08-23 United Networks, Inc. Subscriber station network
US4326109A (en) * 1980-04-11 1982-04-20 Northern Telecom Limited Apparatus for coupling a two-way transmission path to a one-way transmitting path and a one-way receiving path
DE3014187C2 (de) * 1980-04-14 1983-11-17 Nixdorf Computer Ag, 4790 Paderborn Schaltungsanordnung zum zweidrähtigen Anschluß eines Fernsprechteilnehmers an je eine Leitung für angehende und ankommende Signale
DE3019835C2 (de) * 1980-05-23 1983-12-01 Siemens AG, 1000 Berlin und 8000 München Übertragerfreie Gabelschaltung
GB8317706D0 (en) * 1983-06-29 1983-08-03 Standard Telephones Cables Ltd Telephone subsets

Also Published As

Publication number Publication date
GB1328917A (en) 1973-09-05
US3823272A (en) 1974-07-09
AU473401B2 (en) 1976-06-24
CH557626A (de) 1974-12-31
BE792329A (fr) 1973-06-06
AU4919072A (en) 1974-05-23
DE2259993A1 (de) 1973-06-14
ZA727502B (en) 1973-07-25
IE37045L (en) 1973-06-09
CA972887A (en) 1975-08-12
ES409421A1 (es) 1975-12-16
FR2164377A5 (enExample) 1973-07-27

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