FR976792A - Electronic device for simultaneous telephony and telegraphy - Google Patents

Electronic device for simultaneous telephony and telegraphy

Info

Publication number
FR976792A
FR976792A FR976792DA FR976792A FR 976792 A FR976792 A FR 976792A FR 976792D A FR976792D A FR 976792DA FR 976792 A FR976792 A FR 976792A
Authority
FR
France
Prior art keywords
telegraphy
electronic device
simultaneous telephony
telephony
simultaneous
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)
Inventor
Edouard Grand
Jean Goutelle
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.)
CONST RADIOPHONIQUES DU CT
Original Assignee
CONST RADIOPHONIQUES DU CT
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 CONST RADIOPHONIQUES DU CT filed Critical CONST RADIOPHONIQUES DU CT
Application granted granted Critical
Publication of FR976792A publication Critical patent/FR976792A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR976792D 1948-10-19 1948-10-19 Electronic device for simultaneous telephony and telegraphy Expired FR976792A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR976792T 1948-10-19

Publications (1)

Publication Number Publication Date
FR976792A true FR976792A (en) 1951-03-22

Family

ID=9519109

Family Applications (1)

Application Number Title Priority Date Filing Date
FR976792D Expired FR976792A (en) 1948-10-19 1948-10-19 Electronic device for simultaneous telephony and telegraphy

Country Status (1)

Country Link
FR (1) FR976792A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3226480A (en) * 1960-01-21 1965-12-28 Int Standard Electric Corp Duplex data transmission system utilizing a telephone channel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3226480A (en) * 1960-01-21 1965-12-28 Int Standard Electric Corp Duplex data transmission system utilizing a telephone channel

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