FR657642A - Improvements in electric wave signaling systems - Google Patents

Improvements in electric wave signaling systems

Info

Publication number
FR657642A
FR657642A FR657642DA FR657642A FR 657642 A FR657642 A FR 657642A FR 657642D A FR657642D A FR 657642DA FR 657642 A FR657642 A FR 657642A
Authority
FR
France
Prior art keywords
electric wave
signaling systems
wave signaling
systems
electric
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR657642A publication Critical patent/FR657642A/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)
  • Mobile Radio Communication Systems (AREA)
FR657642D 1928-06-06 1928-07-18 Improvements in electric wave signaling systems Expired FR657642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1641928A GB318569A (en) 1928-06-06 1928-06-06 Improvements in signalling arrangements, particularly for use in telephone systems

Publications (1)

Publication Number Publication Date
FR657642A true FR657642A (en) 1929-06-06

Family

ID=10076976

Family Applications (1)

Application Number Title Priority Date Filing Date
FR657642D Expired FR657642A (en) 1928-06-06 1928-07-18 Improvements in electric wave signaling systems

Country Status (2)

Country Link
FR (1) FR657642A (en)
GB (1) GB318569A (en)

Also Published As

Publication number Publication date
GB318569A (en) 1929-09-06

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