CA1018601A - Receivers for plural frequency signalling systems - Google Patents

Receivers for plural frequency signalling systems

Info

Publication number
CA1018601A
CA1018601A CA160,452A CA160452A CA1018601A CA 1018601 A CA1018601 A CA 1018601A CA 160452 A CA160452 A CA 160452A CA 1018601 A CA1018601 A CA 1018601A
Authority
CA
Canada
Prior art keywords
receivers
signalling systems
plural frequency
frequency signalling
plural
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
CA160,452A
Other languages
French (fr)
Other versions
CA160452S (en
Inventor
Eugenius Antoszewski
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Application granted granted Critical
Publication of CA1018601A publication Critical patent/CA1018601A/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Manipulation Of Pulses (AREA)
CA160,452A 1972-01-06 1973-01-03 Receivers for plural frequency signalling systems Expired CA1018601A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB71372A GB1360301A (en) 1972-01-06 1972-01-06 Receivers for plural f'equency signalling systems

Publications (1)

Publication Number Publication Date
CA1018601A true CA1018601A (en) 1977-10-04

Family

ID=9709243

Family Applications (1)

Application Number Title Priority Date Filing Date
CA160,452A Expired CA1018601A (en) 1972-01-06 1973-01-03 Receivers for plural frequency signalling systems

Country Status (6)

Country Link
CA (1) CA1018601A (en)
CH (1) CH567312A5 (en)
DE (1) DE2300262B2 (en)
FR (1) FR2167750B1 (en)
GB (1) GB1360301A (en)
IT (1) IT976274B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3328027A1 (en) * 1983-08-03 1985-02-21 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for detecting frequencies of a supplied signal

Also Published As

Publication number Publication date
DE2300262B2 (en) 1974-07-25
FR2167750B1 (en) 1977-12-30
FR2167750A1 (en) 1973-08-24
AU5044172A (en) 1973-08-23
CH567312A5 (en) 1975-09-30
IT976274B (en) 1974-08-20
DE2300262A1 (en) 1973-07-19
DE2300262C3 (en) 1975-04-03
GB1360301A (en) 1974-07-17

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