IE41753L - Speech immunity arrangement - Google Patents

Speech immunity arrangement

Info

Publication number
IE41753L
IE41753L IE224575A IE224575A IE41753L IE 41753 L IE41753 L IE 41753L IE 224575 A IE224575 A IE 224575A IE 224575 A IE224575 A IE 224575A IE 41753 L IE41753 L IE 41753L
Authority
IE
Ireland
Prior art keywords
arrangement
speech immunity
immunity
speech
immunity arrangement
Prior art date
Application number
IE224575A
Other versions
IE41753B1 (en
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of IE41753L publication Critical patent/IE41753L/en
Publication of IE41753B1 publication Critical patent/IE41753B1/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q1/00Details of selecting apparatus or arrangements
    • H04Q1/18Electrical details
    • H04Q1/30Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/46Signalling 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)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
IE224575A 1974-10-29 1975-10-15 Improvements in or relating to voice frequency receiver IE41753B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4674574A GB1479166A (en) 1974-10-29 1974-10-29 Voice frequency receiver

Publications (2)

Publication Number Publication Date
IE41753L true IE41753L (en) 1976-04-29
IE41753B1 IE41753B1 (en) 1980-03-12

Family

ID=10442428

Family Applications (1)

Application Number Title Priority Date Filing Date
IE224575A IE41753B1 (en) 1974-10-29 1975-10-15 Improvements in or relating to voice frequency receiver

Country Status (3)

Country Link
GB (1) GB1479166A (en)
HK (1) HK5978A (en)
IE (1) IE41753B1 (en)

Also Published As

Publication number Publication date
IE41753B1 (en) 1980-03-12
GB1479166A (en) 1977-07-06
HK5978A (en) 1978-02-03

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