CH266521A - Device for monitoring voice-controlled apparatus. - Google Patents

Device for monitoring voice-controlled apparatus.

Info

Publication number
CH266521A
CH266521A CH266521DA CH266521A CH 266521 A CH266521 A CH 266521A CH 266521D A CH266521D A CH 266521DA CH 266521 A CH266521 A CH 266521A
Authority
CH
Switzerland
Prior art keywords
controlled apparatus
monitoring voice
voice
monitoring
controlled
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Ipsophon Patentgesellschaft
Original Assignee
Ag Ipsophon Patentgesellschaft
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 Ag Ipsophon Patentgesellschaft filed Critical Ag Ipsophon Patentgesellschaft
Publication of CH266521A publication Critical patent/CH266521A/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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party
    • H04M1/654—Telephone line monitoring circuits therefor, e.g. ring detectors

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Meter Arrangements (AREA)
CH266521D 1946-01-29 1946-01-29 Device for monitoring voice-controlled apparatus. CH266521A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH655937X 1946-01-29

Publications (1)

Publication Number Publication Date
CH266521A true CH266521A (en) 1950-01-31

Family

ID=4526497

Family Applications (1)

Application Number Title Priority Date Filing Date
CH266521D CH266521A (en) 1946-01-29 1946-01-29 Device for monitoring voice-controlled apparatus.

Country Status (3)

Country Link
CH (1) CH266521A (en)
GB (1) GB655937A (en)
NL (1) NL67819C (en)

Also Published As

Publication number Publication date
NL67819C (en)
GB655937A (en) 1951-08-08

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