FR2487611B1 - VOICE FREQUENCY KEYBOARD INTERFACE CIRCUIT - Google Patents

VOICE FREQUENCY KEYBOARD INTERFACE CIRCUIT

Info

Publication number
FR2487611B1
FR2487611B1 FR8016112A FR8016112A FR2487611B1 FR 2487611 B1 FR2487611 B1 FR 2487611B1 FR 8016112 A FR8016112 A FR 8016112A FR 8016112 A FR8016112 A FR 8016112A FR 2487611 B1 FR2487611 B1 FR 2487611B1
Authority
FR
France
Prior art keywords
interface circuit
keyboard interface
voice frequency
frequency keyboard
voice
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.)
Expired
Application number
FR8016112A
Other languages
French (fr)
Other versions
FR2487611A1 (en
Inventor
Jean Montenot
Desire Beyhurst
Serge Giorgetti
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.)
ALE International SAS
Original Assignee
La Telephone Industrielle et Commerciale Telic Alcatel SA
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 La Telephone Industrielle et Commerciale Telic Alcatel SA filed Critical La Telephone Industrielle et Commerciale Telic Alcatel SA
Priority to FR8016112A priority Critical patent/FR2487611B1/en
Publication of FR2487611A1 publication Critical patent/FR2487611A1/en
Application granted granted Critical
Publication of FR2487611B1 publication Critical patent/FR2487611B1/en
Expired 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
    • H04M1/26—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
FR8016112A 1980-07-22 1980-07-22 VOICE FREQUENCY KEYBOARD INTERFACE CIRCUIT Expired FR2487611B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8016112A FR2487611B1 (en) 1980-07-22 1980-07-22 VOICE FREQUENCY KEYBOARD INTERFACE CIRCUIT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8016112A FR2487611B1 (en) 1980-07-22 1980-07-22 VOICE FREQUENCY KEYBOARD INTERFACE CIRCUIT

Publications (2)

Publication Number Publication Date
FR2487611A1 FR2487611A1 (en) 1982-01-29
FR2487611B1 true FR2487611B1 (en) 1987-10-30

Family

ID=9244387

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8016112A Expired FR2487611B1 (en) 1980-07-22 1980-07-22 VOICE FREQUENCY KEYBOARD INTERFACE CIRCUIT

Country Status (1)

Country Link
FR (1) FR2487611B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525056A1 (en) * 1982-04-09 1983-10-14 Telephonie Ind Commerciale LINE-OFF PLUG-OUT DEVICE FOR A TELEPHONE STATION COMPRISING A MICROPROCESSOR
FR2529419A1 (en) * 1982-06-29 1983-12-30 Thomson Csf Mat Tel UNIVERSAL TELEPHONE STATION WITH CUSTOMIZABLE FUNCTION KEYS
US20040145358A1 (en) * 2001-04-19 2004-07-29 Rogers Terrence Edwards Method and apparatus for minimizing power dissipation in series connected voltage regulators

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1056970A (en) * 1977-01-10 1979-06-19 Northern Telecom Limited Electronic network for telephone set

Also Published As

Publication number Publication date
FR2487611A1 (en) 1982-01-29

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Legal Events

Date Code Title Description
ST Notification of lapse