NL58054C - Seinstelsel waarbij spreekfrequenties en seinfrequenties in het spreekfrequentiegebied gelijktijdig kunnen voorkomen - Google Patents

Seinstelsel waarbij spreekfrequenties en seinfrequenties in het spreekfrequentiegebied gelijktijdig kunnen voorkomen

Info

Publication number
NL58054C
NL58054C NL93366A NL93366A NL58054C NL 58054 C NL58054 C NL 58054C NL 93366 A NL93366 A NL 93366A NL 93366 A NL93366 A NL 93366A NL 58054 C NL58054 C NL 58054C
Authority
NL
Netherlands
Prior art keywords
speaking
frequencies
frequency range
occur simultaneously
signaling system
Prior art date
Application number
NL93366A
Other languages
English (en)
Dutch (nl)
Original Assignee
Bell Telephone Mfg Co 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 Bell Telephone Mfg Co Sa filed Critical Bell Telephone Mfg Co Sa
Application granted granted Critical
Publication of NL58054C publication Critical patent/NL58054C/nl

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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
    • H04Q1/4535—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted with an additional signal transmitted for voice protection

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
NL93366A 1938-05-20 1939-05-12 Seinstelsel waarbij spreekfrequenties en seinfrequenties in het spreekfrequentiegebied gelijktijdig kunnen voorkomen NL58054C (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15102/38A GB516114A (en) 1938-05-20 1938-05-20 Improvements in or relating to alternating current signalling systems

Publications (1)

Publication Number Publication Date
NL58054C true NL58054C (nl) 1946-06-17

Family

ID=10053070

Family Applications (1)

Application Number Title Priority Date Filing Date
NL93366A NL58054C (nl) 1938-05-20 1939-05-12 Seinstelsel waarbij spreekfrequenties en seinfrequenties in het spreekfrequentiegebied gelijktijdig kunnen voorkomen

Country Status (4)

Country Link
BE (1) BE434428A (fr)
FR (1) FR854916A (fr)
GB (1) GB516114A (fr)
NL (1) NL58054C (fr)

Also Published As

Publication number Publication date
BE434428A (fr) 1939-06-30
FR854916A (fr) 1940-04-27
GB516114A (en) 1939-12-22

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