IT969934B - CIRCUITAL ARRANGEMENT FOR SELECTIVE VITOR RECEIVERS OF SELECTION SIGNALS PROTECTED BY AN ACCIDENTAL FUNCTION CAUSED BY VOICE IN TELECOMMUNICATION SYSTEMS SPECIES IN TELEPHONE SYSTEMS - Google Patents

CIRCUITAL ARRANGEMENT FOR SELECTIVE VITOR RECEIVERS OF SELECTION SIGNALS PROTECTED BY AN ACCIDENTAL FUNCTION CAUSED BY VOICE IN TELECOMMUNICATION SYSTEMS SPECIES IN TELEPHONE SYSTEMS

Info

Publication number
IT969934B
IT969934B IT3095672A IT3095672A IT969934B IT 969934 B IT969934 B IT 969934B IT 3095672 A IT3095672 A IT 3095672A IT 3095672 A IT3095672 A IT 3095672A IT 969934 B IT969934 B IT 969934B
Authority
IT
Italy
Prior art keywords
vitor
receivers
voice
selective
selection signals
Prior art date
Application number
IT3095672A
Other languages
Italian (it)
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 IT969934B publication Critical patent/IT969934B/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)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)
IT3095672A 1971-10-29 1972-10-26 CIRCUITAL ARRANGEMENT FOR SELECTIVE VITOR RECEIVERS OF SELECTION SIGNALS PROTECTED BY AN ACCIDENTAL FUNCTION CAUSED BY VOICE IN TELECOMMUNICATION SYSTEMS SPECIES IN TELEPHONE SYSTEMS IT969934B (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
IT969934B true IT969934B (en) 1974-04-10

Family

ID=5823799

Family Applications (1)

Application Number Title Priority Date Filing Date
IT3095672A IT969934B (en) 1971-10-29 1972-10-26 CIRCUITAL ARRANGEMENT FOR SELECTIVE VITOR RECEIVERS OF SELECTION SIGNALS PROTECTED BY AN ACCIDENTAL FUNCTION CAUSED BY VOICE IN TELECOMMUNICATION SYSTEMS SPECIES IN 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
GB1400630A (en) 1975-07-16
DE2154078A1 (en) 1973-05-03
DE2154078C3 (en) 1979-07-19
DE2154078B2 (en) 1978-11-16
BE790656A (en) 1973-04-27
LU66383A1 (en) 1973-01-23
CH545568A (en) 1974-01-31
SE377417B (en) 1975-06-30
AT323242B (en) 1975-06-25
FR2159024A5 (en) 1973-06-15
NL7214616A (en) 1973-05-02

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