FR922528A - Improvement in voice frequency signaling processes - Google Patents

Improvement in voice frequency signaling processes

Info

Publication number
FR922528A
FR922528A FR922528DA FR922528A FR 922528 A FR922528 A FR 922528A FR 922528D A FR922528D A FR 922528DA FR 922528 A FR922528 A FR 922528A
Authority
FR
France
Prior art keywords
improvement
voice frequency
signaling processes
frequency signaling
processes
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
Walter Brandt
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR922528A publication Critical patent/FR922528A/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
    • H04Q1/444—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)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
FR922528D 1945-02-21 1946-02-18 Improvement in voice frequency signaling processes Expired FR922528A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US579126A US2414440A (en) 1945-02-21 1945-02-21 Voice frequency ringer

Publications (1)

Publication Number Publication Date
FR922528A true FR922528A (en) 1947-06-11

Family

ID=24315671

Family Applications (1)

Application Number Title Priority Date Filing Date
FR922528D Expired FR922528A (en) 1945-02-21 1946-02-18 Improvement in voice frequency signaling processes

Country Status (5)

Country Link
US (1) US2414440A (en)
BE (1) BE467777A (en)
ES (1) ES172956A1 (en)
FR (1) FR922528A (en)
GB (1) GB608117A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1004860B (en) * 1952-12-18 1957-03-21 Roland Laraque Internal combustion engine with opposing pistons

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR960967A (en) * 1945-02-06 1950-04-28
US2751436A (en) * 1952-03-27 1956-06-19 Automatic Elect Lab Carrier current telephone systems
FR1098648A (en) * 1954-01-22 1955-08-16 Lignes Telegraph Telephon Telegraph signal reception device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1004860B (en) * 1952-12-18 1957-03-21 Roland Laraque Internal combustion engine with opposing pistons

Also Published As

Publication number Publication date
BE467777A (en)
ES172956A1 (en) 1946-05-01
US2414440A (en) 1947-01-21
GB608117A (en) 1948-09-09

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