AR198437A1 - Receptor de senal con proteccion vocal y seleccion de frecuencia para instalaciones de telecomunicaciones particularmente instalaciones telefonicas - Google Patents

Receptor de senal con proteccion vocal y seleccion de frecuencia para instalaciones de telecomunicaciones particularmente instalaciones telefonicas

Info

Publication number
AR198437A1
AR198437A1 AR250254A AR25025473A AR198437A1 AR 198437 A1 AR198437 A1 AR 198437A1 AR 250254 A AR250254 A AR 250254A AR 25025473 A AR25025473 A AR 25025473A AR 198437 A1 AR198437 A1 AR 198437A1
Authority
AR
Argentina
Prior art keywords
installations
vocal
protection
signal receiver
frequency selection
Prior art date
Application number
AR250254A
Other languages
English (en)
Spanish (es)
Original Assignee
Siemens Ag
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
Priority claimed from DE19722247575 external-priority patent/DE2247575C3/de
Application filed by Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of AR198437A1 publication Critical patent/AR198437A1/es

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)
  • Noise Elimination (AREA)
  • Telephonic Communication Services (AREA)
  • Circuits Of Receivers In General (AREA)
  • Telephone Function (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
AR250254A 1972-09-28 1973-09-25 Receptor de senal con proteccion vocal y seleccion de frecuencia para instalaciones de telecomunicaciones particularmente instalaciones telefonicas AR198437A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722247575 DE2247575C3 (de) 1972-09-28 Sprachgeschützter frequenzselektiver Zeichenempfänger für Fernmelde-, insbesondere Fernsprechanlagen

Publications (1)

Publication Number Publication Date
AR198437A1 true AR198437A1 (es) 1974-06-21

Family

ID=5857625

Family Applications (1)

Application Number Title Priority Date Filing Date
AR250254A AR198437A1 (es) 1972-09-28 1973-09-25 Receptor de senal con proteccion vocal y seleccion de frecuencia para instalaciones de telecomunicaciones particularmente instalaciones telefonicas

Country Status (15)

Country Link
US (1) US3932708A (it)
JP (1) JPS5340287B2 (it)
AR (1) AR198437A1 (it)
AT (1) AT330252B (it)
BE (1) BE805472A (it)
BR (1) BR7307526D0 (it)
CH (1) CH566097A5 (it)
DK (1) DK141570C (it)
FR (1) FR2201599B1 (it)
GB (1) GB1440773A (it)
IT (1) IT993394B (it)
LU (1) LU68509A1 (it)
NL (1) NL7313199A (it)
NO (1) NO139195C (it)
SE (1) SE395213B (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157918B (en) * 1984-04-09 1987-12-02 Ricoh Kk Call signal detecting device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL267564A (it) * 1960-08-22
FR1511133A (fr) * 1966-12-16 1968-01-26 Ass Ouvriers Instr Precision Procédé d'identification de chacune des fréquences d'un groupe de plusieurs fréquences déterminées et appareil récepteur pour la mise en oeuvre de ce procédé
US3537001A (en) * 1968-12-05 1970-10-27 Bell Telephone Labor Inc Multifrequency tone detector
US3582565A (en) * 1969-01-13 1971-06-01 Automatic Elect Lab Tone channels for multifrequency receivers
US3582562A (en) * 1969-05-07 1971-06-01 Itt Key telephone intercommunication system
FR2141502B1 (it) * 1971-06-01 1973-06-29 Ibm France
US3812432A (en) * 1973-01-05 1974-05-21 Bell Telephone Labor Inc Tone detector

Also Published As

Publication number Publication date
BE805472A (fr) 1974-03-28
IT993394B (it) 1975-09-30
DE2247575B2 (de) 1975-09-04
GB1440773A (en) 1976-06-23
SE395213B (sv) 1977-08-01
CH566097A5 (it) 1975-08-29
DK141570B (da) 1980-04-21
AT330252B (de) 1976-06-25
LU68509A1 (it) 1973-12-07
JPS5340287B2 (it) 1978-10-26
DE2247575A1 (de) 1974-04-18
NO139195C (no) 1979-01-17
FR2201599A1 (it) 1974-04-26
NO139195B (no) 1978-10-09
ATA699873A (de) 1975-09-15
AU5990273A (en) 1975-03-06
US3932708A (en) 1976-01-13
DK141570C (da) 1980-10-06
BR7307526D0 (pt) 1974-08-29
JPS4973013A (it) 1974-07-15
NL7313199A (it) 1974-04-01
FR2201599B1 (it) 1979-05-11

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