FR864985A - Method and device for calling for telephone communications - Google Patents

Method and device for calling for telephone communications

Info

Publication number
FR864985A
FR864985A FR864985DA FR864985A FR 864985 A FR864985 A FR 864985A FR 864985D A FR864985D A FR 864985DA FR 864985 A FR864985 A FR 864985A
Authority
FR
France
Prior art keywords
calling
telephone communications
telephone
communications
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
Other languages
French (fr)
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.)
SOC ET LIAISONS TELEPHONIQUES
Original Assignee
SOC ET LIAISONS TELEPHONIQUES
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 SOC ET LIAISONS TELEPHONIQUES filed Critical SOC ET LIAISONS TELEPHONIQUES
Application granted granted Critical
Publication of FR864985A publication Critical patent/FR864985A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/14—Arrangements providing for calling or supervisory signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
FR864985D 1940-01-03 1940-01-03 Method and device for calling for telephone communications Expired FR864985A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR864985T 1940-01-03

Publications (1)

Publication Number Publication Date
FR864985A true FR864985A (en) 1941-05-09

Family

ID=9344142

Family Applications (1)

Application Number Title Priority Date Filing Date
FR864985D Expired FR864985A (en) 1940-01-03 1940-01-03 Method and device for calling for telephone communications

Country Status (1)

Country Link
FR (1) FR864985A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1001708B (en) * 1951-04-27 1957-01-31 Int Standard Electric Corp Audio frequency signal receivers for wide area systems in which audio frequency signals are transmitted for calling and dialing purposes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1001708B (en) * 1951-04-27 1957-01-31 Int Standard Electric Corp Audio frequency signal receivers for wide area systems in which audio frequency signals are transmitted for calling and dialing purposes

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