SU575780A1 - Method of protecting audio signal receiver from untimely operation at multifrequency transmission of data through telephone channels with two frequency signalling - Google Patents

Method of protecting audio signal receiver from untimely operation at multifrequency transmission of data through telephone channels with two frequency signalling

Info

Publication number
SU575780A1
SU575780A1 SU7301934416A SU1934416A SU575780A1 SU 575780 A1 SU575780 A1 SU 575780A1 SU 7301934416 A SU7301934416 A SU 7301934416A SU 1934416 A SU1934416 A SU 1934416A SU 575780 A1 SU575780 A1 SU 575780A1
Authority
SU
USSR - Soviet Union
Prior art keywords
data
audio signal
signal receiver
telephone channels
frequency signalling
Prior art date
Application number
SU7301934416A
Other languages
Russian (ru)
Inventor
Иосиф Исакович Нахимович
Original Assignee
Ленинградский Филиал Центрального Научно-Исследовательского Института Связи
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 Ленинградский Филиал Центрального Научно-Исследовательского Института Связи filed Critical Ленинградский Филиал Центрального Научно-Исследовательского Института Связи
Priority to SU7301934416A priority Critical patent/SU575780A1/en
Application granted granted Critical
Publication of SU575780A1 publication Critical patent/SU575780A1/en

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Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Mobile Radio Communication Systems (AREA)

Description

бора отсчете времени непрерьшного при-частот, наход щихс  в полосе частот присутстви  в передаваемом сигнале частот,емника тонального набора, прерывают, наход щихс  в полосе частот приемникаесли врем  присутстви  этих частот тонального набора, отличаю-достигло предела, определ емого врещ и и с   тем, что, с целью обеспе- 5менем срабатывани  приемника тональчени  целостности установленного соеди-ного набора, и возобновл ют через нени  при наличии в передаваемом сигна-промежуток времени, определ емый вреле частот, наход щихс  в полосе частотменем возвращени  приемника тональноприемника тонального набора, передачуго набора в исходное состо ние.Boron counting the time of the continuous at-frequencies in the frequency band of the presence in the transmitted signal of frequencies that, in order to ensure that the receiver triggers the integrity integrity of the set up dial-up set, and renews it when the transmitted signal-period is determined by the frequency The receiver will reset the tone receiver to a tonal set, the transmission to the initial state.

SU7301934416A 1973-06-18 1973-06-18 Method of protecting audio signal receiver from untimely operation at multifrequency transmission of data through telephone channels with two frequency signalling SU575780A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU7301934416A SU575780A1 (en) 1973-06-18 1973-06-18 Method of protecting audio signal receiver from untimely operation at multifrequency transmission of data through telephone channels with two frequency signalling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU7301934416A SU575780A1 (en) 1973-06-18 1973-06-18 Method of protecting audio signal receiver from untimely operation at multifrequency transmission of data through telephone channels with two frequency signalling

Publications (1)

Publication Number Publication Date
SU575780A1 true SU575780A1 (en) 1977-10-05

Family

ID=20557219

Family Applications (1)

Application Number Title Priority Date Filing Date
SU7301934416A SU575780A1 (en) 1973-06-18 1973-06-18 Method of protecting audio signal receiver from untimely operation at multifrequency transmission of data through telephone channels with two frequency signalling

Country Status (1)

Country Link
SU (1) SU575780A1 (en)

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