Nothing Special   »   [go: up one dir, main page]

JPS57212853A - Subscriber's telephone electronic voice circuit - Google Patents

Subscriber's telephone electronic voice circuit

Info

Publication number
JPS57212853A
JPS57212853A JP57098603A JP9860382A JPS57212853A JP S57212853 A JPS57212853 A JP S57212853A JP 57098603 A JP57098603 A JP 57098603A JP 9860382 A JP9860382 A JP 9860382A JP S57212853 A JPS57212853 A JP S57212853A
Authority
JP
Japan
Prior art keywords
subscriber
voice circuit
electronic voice
telephone electronic
telephone
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP57098603A
Other languages
English (en)
Inventor
Sutobusu Uiriamu
Hainzu Chiyaaruzu
Daburiyuu Raito Ritsukii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GTE Automatic Electric Laboratories Inc
Verizon Laboratories Inc
Original Assignee
GTE Automatic Electric Laboratories Inc
GTE Laboratories 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 Laboratories Inc, GTE Laboratories Inc filed Critical GTE Automatic Electric Laboratories Inc
Publication of JPS57212853A publication Critical patent/JPS57212853A/ja
Pending legal-status Critical Current

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
    • 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)
JP57098603A 1981-06-15 1982-06-10 Subscriber's telephone electronic voice circuit Pending JPS57212853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/273,700 US4400588A (en) 1981-06-15 1981-06-15 Electronic voice network for a telephone subscriber's substation

Publications (1)

Publication Number Publication Date
JPS57212853A true JPS57212853A (en) 1982-12-27

Family

ID=23045045

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57098603A Pending JPS57212853A (en) 1981-06-15 1982-06-10 Subscriber's telephone electronic voice circuit

Country Status (6)

Country Link
US (1) US4400588A (ja)
JP (1) JPS57212853A (ja)
AU (1) AU547301B2 (ja)
BE (1) BE893498A (ja)
CA (1) CA1186084A (ja)
IT (1) IT1153526B (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8200666A (nl) * 1982-02-19 1983-09-16 Philips Nv Transmissieschakeling voor een elektronisch telefoontoestel.
US4495382A (en) * 1982-04-23 1985-01-22 Fairchild Camera And Instrument Corporation Telephone regulator circuitry
DE3237681C2 (de) * 1982-10-12 1986-03-27 Standard Elektrik Lorenz Ag, 7000 Stuttgart Speiseschaltung für einen veränderlichen Verbraucherwiderstand und mit unterschiedlich wirkendem Ausgangswiderstand
US4550226A (en) * 1983-05-02 1985-10-29 Gte Communication Systems Corporation Subscriber's telephone circuit arranged to present constant impedance to a telephone line
US4633217A (en) * 1984-06-04 1986-12-30 Yamatake Honeywell Communication apparatus
KR0143313B1 (ko) * 1995-07-08 1998-08-01 김광호 키폰시스템에서의 밸런스 네트워크
US6529450B1 (en) * 1998-08-03 2003-03-04 Dictaphone Corporation Hand microphone interfaced to game controller port of personal computer
US6763107B1 (en) * 1999-11-02 2004-07-13 Agere Systems Inc. Method and apparatus for reducing distortion in a line powered modulator circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1350205A (en) * 1970-07-24 1974-04-18 Post Office Telephone subscribers instrument circuits
JPS5356903A (en) * 1976-11-02 1978-05-23 Nippon Telegr & Teleph Corp <Ntt> Automatic level control circuit for telephone set
US4332984A (en) * 1979-12-13 1982-06-01 Bell Telephone Laboratories, Incorporated Active speech network circuit for a telephone set

Also Published As

Publication number Publication date
BE893498A (fr) 1982-10-01
AU547301B2 (en) 1985-10-17
CA1186084A (en) 1985-04-23
IT8221844A0 (it) 1982-06-14
IT1153526B (it) 1987-01-14
US4400588A (en) 1983-08-23
AU8315882A (en) 1982-12-23

Similar Documents

Publication Publication Date Title
GB2102249B (en) Telephone line circuit
JPS57109436A (en) Subscriber&#39;s telephone set
EP0484051A3 (en) Telephone interface circuit
GB2107554B (en) Telephone line circuit
GB2091973B (en) Subscriber line interface circuit
GB2091521B (en) Telephone subscriber&#39;s line circuit with overvoltage protection
GB2007463B (en) Telephone subscriber&#39;s line circuit
DE3274509D1 (en) Telephone line circuit
DE3260124D1 (en) Subscriber circuit
JPS57212853A (en) Subscriber&#39;s telephone electronic voice circuit
ZA816703B (en) Telephone subscriber connection circuits
GB2018093B (en) Telephone subscriber&#39;s line circuit
ZA826239B (en) A telephone subscriber connection circuit
GB2097632B (en) Telephone subscriber&#39;s set and circuit therefor
GB2146873B (en) Telephone subscriber line circuit
GB2132448B (en) Telephone subscribers&#39; line interface circuit
ZA854193B (en) Telephone subscribers&#39;circuits
JPS56164660A (en) Subscriber&#39;s line interface circuit
GB2098429B (en) Electronic tone ringer
GB2034557B (en) Transmission bridge for telephone subscriber&#39;s line circuit
ZA825392B (en) Telephone subscriber&#39;s apparatus
HUT39303A (en) Flash-key circuit for breaking the subscriber&#39;s signalling line of telephone set with multifrequency change
GB2138655B (en) Telephone subscriber&#39;s apparatus
PL261209A1 (en) Electronic individual subscriber&#39;s line telephone set
GB2115650B (en) Telephone subscriber&#39;s instrument circuit