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FR749247A - Call transmission for automatic telephony on telecommunication lines - Google Patents

Call transmission for automatic telephony on telecommunication lines

Info

Publication number
FR749247A
FR749247A FR749247DA FR749247A FR 749247 A FR749247 A FR 749247A FR 749247D A FR749247D A FR 749247DA FR 749247 A FR749247 A FR 749247A
Authority
FR
France
Prior art keywords
call transmission
telecommunication lines
automatic telephony
telephony
automatic
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.)
Lignes Telegraphiques et Telephoniques LTT SA
Original Assignee
Lignes Telegraphiques et Telephoniques LTT 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 Lignes Telegraphiques et Telephoniques LTT SA filed Critical Lignes Telegraphiques et Telephoniques LTT SA
Application granted granted Critical
Publication of FR749247A publication Critical patent/FR749247A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR749247D 1932-04-08 1932-04-08 Call transmission for automatic telephony on telecommunication lines Expired FR749247A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR749247T 1932-04-08

Publications (1)

Publication Number Publication Date
FR749247A true FR749247A (en) 1933-07-20

Family

ID=9148938

Family Applications (1)

Application Number Title Priority Date Filing Date
FR749247D Expired FR749247A (en) 1932-04-08 1932-04-08 Call transmission for automatic telephony on telecommunication lines

Country Status (1)

Country Link
FR (1) FR749247A (en)

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