SE436239B - Automatisk signalnivareleringskrets for en telefonapparat - Google Patents

Automatisk signalnivareleringskrets for en telefonapparat

Info

Publication number
SE436239B
SE436239B SE7712127A SE7712127A SE436239B SE 436239 B SE436239 B SE 436239B SE 7712127 A SE7712127 A SE 7712127A SE 7712127 A SE7712127 A SE 7712127A SE 436239 B SE436239 B SE 436239B
Authority
SE
Sweden
Prior art keywords
signal level
phone device
level circuit
automatic signal
automatic
Prior art date
Application number
SE7712127A
Other languages
English (en)
Other versions
SE7712127L (sv
Inventor
M Yoshitoshi
I Kawashima
H Kishimoto
M Terai
K Kato
Original Assignee
Nippon Telegraph & Telephone
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 Nippon Telegraph & Telephone filed Critical Nippon Telegraph & Telephone
Publication of SE7712127L publication Critical patent/SE7712127L/sv
Publication of SE436239B publication Critical patent/SE436239B/sv

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
SE7712127A 1976-11-02 1977-10-27 Automatisk signalnivareleringskrets for en telefonapparat SE436239B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13206176A JPS5356903A (en) 1976-11-02 1976-11-02 Automatic level control circuit for telephone set

Publications (2)

Publication Number Publication Date
SE7712127L SE7712127L (sv) 1978-05-03
SE436239B true SE436239B (sv) 1984-11-19

Family

ID=15072587

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7712127A SE436239B (sv) 1976-11-02 1977-10-27 Automatisk signalnivareleringskrets for en telefonapparat

Country Status (8)

Country Link
US (1) US4143247A (sv)
JP (1) JPS5356903A (sv)
CA (1) CA1088687A (sv)
DE (1) DE2749049C2 (sv)
DK (1) DK159234C (sv)
FR (1) FR2369758A1 (sv)
GB (1) GB1565887A (sv)
SE (1) SE436239B (sv)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5591255A (en) * 1978-12-29 1980-07-10 Nippon Telegr & Teleph Corp <Ntt> Talking method via telephone set
JPS5831122B2 (ja) * 1979-01-19 1983-07-04 仁 伊藤 混合回路
US4268723A (en) * 1979-09-04 1981-05-19 Western Electric Company Circuits and methods for initializing the loop current of a telephone set
US4332984A (en) * 1979-12-13 1982-06-01 Bell Telephone Laboratories, Incorporated Active speech network circuit for a telephone set
US4343971A (en) * 1981-02-17 1982-08-10 Reliance Electric Company Subscriber drop circuit for controlling drop current with load and maximizing power usage
NL8103419A (nl) * 1981-04-01 1982-11-01 Philips Nv Lijntestcircuit voor een abonneetelefoontoestel.
US4400588A (en) * 1981-06-15 1983-08-23 Gte Automatic Electric Labs Inc. Electronic voice network for a telephone subscriber's substation
US4495382A (en) * 1982-04-23 1985-01-22 Fairchild Camera And Instrument Corporation Telephone regulator circuitry
GB2126046A (en) * 1982-08-25 1984-03-14 Philips Electronic Associated Telephone circuit
JPS59178058A (ja) * 1983-03-29 1984-10-09 Nitsuko Ltd 受話自動音量調節回路
JPS61208951A (ja) * 1985-03-13 1986-09-17 Sharp Corp 拡声電話機
US5898756A (en) * 1995-10-13 1999-04-27 Zoom Telephonics, Inc. Parallel-connected dialing signal transmission-inhibiting device for data transfer over a telephone link
CA2266322C (en) * 1998-04-03 2011-10-25 Wayne Kwok-Wai Wong High current protection circuit for telephone interface

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251951A (en) * 1962-02-26 1966-05-17 Philips Corp Circuit for automatic adjustment of impedance of a telephone loop
US3508009A (en) * 1967-09-06 1970-04-21 Bell Telephone Labor Inc Range extension circuit
BE792329A (fr) * 1971-12-09 1973-06-06 Int Standard Electric Corp Circuit de transmission electronique pour poste telephonique
CA1032221A (en) * 1974-06-14 1978-05-30 Mitel Canada Limited Telephone line impedance regulator

Also Published As

Publication number Publication date
SE7712127L (sv) 1978-05-03
DK159234B (da) 1990-09-17
GB1565887A (en) 1980-04-23
JPS5356903A (en) 1978-05-23
DK159234C (da) 1991-02-25
DE2749049C2 (de) 1983-06-09
FR2369758B1 (sv) 1981-12-18
DE2749049A1 (de) 1978-05-03
JPS5528630B2 (sv) 1980-07-29
FR2369758A1 (fr) 1978-05-26
CA1088687A (en) 1980-10-28
DK463077A (da) 1978-05-03
US4143247A (en) 1979-03-06

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