IT8321806A0 - Commutatore centrale elettronico. - Google Patents

Commutatore centrale elettronico.

Info

Publication number
IT8321806A0
IT8321806A0 IT8321806A IT2180683A IT8321806A0 IT 8321806 A0 IT8321806 A0 IT 8321806A0 IT 8321806 A IT8321806 A IT 8321806A IT 2180683 A IT2180683 A IT 2180683A IT 8321806 A0 IT8321806 A0 IT 8321806A0
Authority
IT
Italy
Prior art keywords
central switch
electronic central
electronic
switch
central
Prior art date
Application number
IT8321806A
Other languages
English (en)
Other versions
IT1163604B (it
Inventor
Gary Grantland
Original Assignee
Gte Automatic Electric 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 Inc filed Critical Gte Automatic Electric Inc
Publication of IT8321806A0 publication Critical patent/IT8321806A0/it
Application granted granted Critical
Publication of IT1163604B publication Critical patent/IT1163604B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
IT21806/83A 1982-07-07 1983-06-27 Commutatore centrale elettronico IT1163604B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/395,885 US4442322A (en) 1982-07-07 1982-07-07 Electronic common switch having an improved receiver mating arrangement

Publications (2)

Publication Number Publication Date
IT8321806A0 true IT8321806A0 (it) 1983-06-27
IT1163604B IT1163604B (it) 1987-04-08

Family

ID=23564946

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21806/83A IT1163604B (it) 1982-07-07 1983-06-27 Commutatore centrale elettronico

Country Status (4)

Country Link
US (1) US4442322A (it)
JP (1) JPS5923665A (it)
CA (1) CA1193775A (it)
IT (1) IT1163604B (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01141451A (ja) * 1987-11-27 1989-06-02 Sharp Corp 電話機
JP2658270B2 (ja) * 1988-09-30 1997-09-30 日本電気株式会社 ダイヤル確認音出力回路
US5191606A (en) * 1990-05-08 1993-03-02 Industrial Technology Research Institute Electrical telephone speech network
KR0138189B1 (ko) * 1995-05-31 1998-07-01 김광호 디지탈키폰전화기에서 스피커폰 사용시 톤신호 노이즈 제거방법

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315108A (en) * 1975-09-29 1982-02-09 Mostek Corporation Integrated circuit chip telephone communication system
US4087638A (en) * 1976-10-01 1978-05-02 Telaris Telecommunications Inc. DTMF Communication system
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
JPS5923665A (ja) 1984-02-07
CA1193775A (en) 1985-09-17
IT1163604B (it) 1987-04-08
US4442322A (en) 1984-04-10

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