SE7702418L - Mottagare for flerfrekvenssignalering - Google Patents

Mottagare for flerfrekvenssignalering

Info

Publication number
SE7702418L
SE7702418L SE7702418A SE7702418A SE7702418L SE 7702418 L SE7702418 L SE 7702418L SE 7702418 A SE7702418 A SE 7702418A SE 7702418 A SE7702418 A SE 7702418A SE 7702418 L SE7702418 L SE 7702418L
Authority
SE
Sweden
Prior art keywords
signals
band
low
high band
frequency
Prior art date
Application number
SE7702418A
Other languages
Unknown language ( )
English (en)
Other versions
SE424129B (sv
Inventor
D E Rittenhouse
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of SE7702418L publication Critical patent/SE7702418L/sv
Publication of SE424129B publication Critical patent/SE424129B/sv

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
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Stereo-Broadcasting Methods (AREA)
SE7702418A 1976-03-03 1977-03-03 Mottagare for flerfrekvenssignaler SE424129B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA247,035A CA1031086A (en) 1976-03-03 1976-03-03 Method and apparatus for translating multiple frequency signalling

Publications (2)

Publication Number Publication Date
SE7702418L true SE7702418L (sv) 1977-09-04
SE424129B SE424129B (sv) 1982-06-28

Family

ID=4105372

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7702418A SE424129B (sv) 1976-03-03 1977-03-03 Mottagare for flerfrekvenssignaler

Country Status (11)

Country Link
JP (1) JPS52107708A (sv)
AU (1) AU508271B2 (sv)
BE (1) BE852056A (sv)
CA (1) CA1031086A (sv)
DE (1) DE2709370A1 (sv)
DK (1) DK88877A (sv)
FR (1) FR2343377A1 (sv)
GB (1) GB1532103A (sv)
NL (1) NL186057C (sv)
NO (1) NO770696L (sv)
SE (1) SE424129B (sv)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5831140B2 (ja) * 1978-11-10 1983-07-04 株式会社日立製作所 信号受信器
DE3629907A1 (de) * 1986-09-03 1988-03-10 Standard Elektrik Lorenz Ag Signalisierungsempfaenger

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743945A (en) * 1970-12-23 1973-07-03 Itt Limiter for multi frequency voice receiver
FR2127450A5 (sv) * 1971-03-03 1972-10-13 Ibm France
DE2116635C3 (de) * 1971-04-05 1978-10-05 Ibm Deutschland Gmbh, 7000 Stuttgart Verfahren zur digitalen Decodierung frequenzcodierter Signale und Schaltungsanordnung zur Durchführung des Verfahrens
CA976675A (en) * 1972-10-16 1975-10-21 Microsystems International Limited Dual tone receiver
US3914557A (en) * 1973-04-11 1975-10-21 Bell Telephone Labor Inc Multifrequency tone detecting arrangement
US3936801A (en) * 1974-09-12 1976-02-03 Bell Telephone Laboratories, Incorporated Multifrequency signal receiver timing circuit

Also Published As

Publication number Publication date
FR2343377B1 (sv) 1983-08-12
NL186057C (nl) 1990-09-03
FR2343377A1 (fr) 1977-09-30
NO770696L (no) 1977-09-06
BE852056A (fr) 1977-07-01
DK88877A (da) 1977-09-04
NL7702219A (nl) 1977-09-06
AU508271B2 (en) 1980-03-13
DE2709370A1 (de) 1977-09-08
NL186057B (nl) 1990-04-02
JPS52107708A (en) 1977-09-09
AU2244877A (en) 1978-08-24
SE424129B (sv) 1982-06-28
CA1031086A (en) 1978-05-09
GB1532103A (en) 1978-11-15

Similar Documents

Publication Publication Date Title
KR890006012A (ko) 무선전화장치
ES8206935A1 (es) Circuito de control de onda de senal
SE9202065D0 (sv) Saett att foerbaettra mottagarens kaenslighet och talimmuniteten vid dtmf-mottagning
IT8220586A0 (it) Disposizione di rivelazione di rumore e ricezione di segnali per un ricevitore modulato in frequenza.
FR2648661B1 (fr) Detecteur de signaux alternatifs basse frequence notamment pour joncteur telephonique
ES486655A1 (es) Perfeccionamientos en aparatos para detectar senales de mul-tifrecuencia en una senal entrante
IT8220713A0 (it) Apparecchiatura per rivelare la presenza di segnali multifrequenziali in un segnale ricevuto.
SE7702418L (sv) Mottagare for flerfrekvenssignalering
KR970704308A (ko) 개선된 음을 갖는 전송 시스템
US4028501A (en) Method and apparatus for translating multiple frequency signalling
YU62277A (en) Receiver for detecting two frequencies from the range in a multifrequency tone signal
JPS57125550A (en) Data collecting system
FR2384390A1 (fr) Circuit de silence pour recepteur radio
JPS5363910A (en) Audible signal sound signal detection system
IT1140634B (it) Ricevitore digitale di chiamata,per la ricezione di tono segnali modulati impulsivamente in codice
IT8022021A0 (it) Impianto ricevitore di segnali radio avente un combinatore accoppiato con una pluralita' di sezioni riceventi.
JPS5474617A (en) Receiver
JPS56111332A (en) Caller discrimination system
JPS535916A (en) Disturbance signal elimination unit
JPS53110408A (en) Detection circuit for digital signal
JPS56128057A (en) Automatic circuit supervisory unit
JPS56168450A (en) Fault detecting system of fm radio receiver
JPS5772451A (en) Frequency detection system
JPS5627541A (en) Signal transmission-reception system
JPS6439900A (en) Receiver

Legal Events

Date Code Title Description
NUG Patent has lapsed

Ref document number: 7702418-0

Effective date: 19911009

Format of ref document f/p: F