FR64957E - Voice frequency receivers - Google Patents

Voice frequency receivers

Info

Publication number
FR64957E
FR64957E FR64957DA FR64957E FR 64957 E FR64957 E FR 64957E FR 64957D A FR64957D A FR 64957DA FR 64957 E FR64957 E FR 64957E
Authority
FR
France
Prior art keywords
voice frequency
frequency receivers
receivers
voice
frequency
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
Martin Janke
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 FR64957E publication Critical patent/FR64957E/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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Amplifiers (AREA)
FR64957D 1951-04-27 1952-06-27 Voice frequency receivers Expired FR64957E (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL160821 1951-04-27
DE303094X 1951-06-30
NL219653 1957-08-06

Publications (1)

Publication Number Publication Date
FR64957E true FR64957E (en) 1955-12-15

Family

ID=27188829

Family Applications (1)

Application Number Title Priority Date Filing Date
FR64957D Expired FR64957E (en) 1951-04-27 1952-06-27 Voice frequency receivers

Country Status (2)

Country Link
FR (1) FR64957E (en)
GB (1) GB712952A (en)

Also Published As

Publication number Publication date
GB712952A (en) 1954-08-04

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