AT323242B - CIRCUIT ARRANGEMENT FOR VOICE-PROTECTED PREQUENCE-SELECTIVE DIAL RECEIVERS IN TELEVISION SYSTEMS, IN PARTICULAR TELEPHONE SYSTEMS - Google Patents

CIRCUIT ARRANGEMENT FOR VOICE-PROTECTED PREQUENCE-SELECTIVE DIAL RECEIVERS IN TELEVISION SYSTEMS, IN PARTICULAR TELEPHONE SYSTEMS

Info

Publication number
AT323242B
AT323242B AT830572A AT830572A AT323242B AT 323242 B AT323242 B AT 323242B AT 830572 A AT830572 A AT 830572A AT 830572 A AT830572 A AT 830572A AT 323242 B AT323242 B AT 323242B
Authority
AT
Austria
Prior art keywords
systems
prequence
voice
protected
circuit arrangement
Prior art date
Application number
AT830572A
Other languages
German (de)
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
Application filed by Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of AT323242B publication Critical patent/AT323242B/en

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
    • H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Function (AREA)
  • Telephonic Communication Services (AREA)
  • Mobile Radio Communication Systems (AREA)
AT830572A 1971-10-29 1972-09-27 CIRCUIT ARRANGEMENT FOR VOICE-PROTECTED PREQUENCE-SELECTIVE DIAL RECEIVERS IN TELEVISION SYSTEMS, IN PARTICULAR TELEPHONE SYSTEMS AT323242B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712154078 DE2154078C3 (en) 1971-10-29 1971-10-29 Circuit arrangement for voice-protected, frequency-selective dialing identifier receivers in telecommunications, in particular telephone systems

Publications (1)

Publication Number Publication Date
AT323242B true AT323242B (en) 1975-06-25

Family

ID=5823799

Family Applications (1)

Application Number Title Priority Date Filing Date
AT830572A AT323242B (en) 1971-10-29 1972-09-27 CIRCUIT ARRANGEMENT FOR VOICE-PROTECTED PREQUENCE-SELECTIVE DIAL RECEIVERS IN TELEVISION SYSTEMS, IN PARTICULAR TELEPHONE SYSTEMS

Country Status (10)

Country Link
AT (1) AT323242B (en)
BE (1) BE790656A (en)
CH (1) CH545568A (en)
DE (1) DE2154078C3 (en)
FR (1) FR2159024A5 (en)
GB (1) GB1400630A (en)
IT (1) IT969934B (en)
LU (1) LU66383A1 (en)
NL (1) NL7214616A (en)
SE (1) SE377417B (en)

Also Published As

Publication number Publication date
LU66383A1 (en) 1973-01-23
NL7214616A (en) 1973-05-02
BE790656A (en) 1973-04-27
FR2159024A5 (en) 1973-06-15
IT969934B (en) 1974-04-10
DE2154078C3 (en) 1979-07-19
GB1400630A (en) 1975-07-16
DE2154078A1 (en) 1973-05-03
SE377417B (en) 1975-06-30
DE2154078B2 (en) 1978-11-16
CH545568A (en) 1974-01-31

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee