ES386797A1 - Tone signalling apparatus - Google Patents

Tone signalling apparatus

Info

Publication number
ES386797A1
ES386797A1 ES386797A ES386797A ES386797A1 ES 386797 A1 ES386797 A1 ES 386797A1 ES 386797 A ES386797 A ES 386797A ES 386797 A ES386797 A ES 386797A ES 386797 A1 ES386797 A1 ES 386797A1
Authority
ES
Spain
Prior art keywords
hum
sequence
station
hums
generators
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
ES386797A
Other languages
Spanish (es)
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.)
FANTRON CORP
Original Assignee
FANTRON 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
Priority claimed from US887971A external-priority patent/US3649770A/en
Application filed by FANTRON CORP filed Critical FANTRON CORP
Publication of ES386797A1 publication Critical patent/ES386797A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/185—Selective call encoders for paging networks, e.g. paging centre devices
    • H04W88/188—Selective call encoders for paging networks, e.g. paging centre devices using frequency address codes
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/12—Electric signal transmission systems in which the signal transmitted is frequency or phase of AC
    • G08C19/14—Electric signal transmission systems in which the signal transmitted is frequency or phase of AC using combination of fixed frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Selective Calling Equipment (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Filters And Equalizers (AREA)

Abstract

Refinements in hum frequency current signal transmission systems of the hum type comprising a transmitter station providing a sequence of hum signals and a receiver station comprising means for detecting the hum signal, characterized in that, in At the transmitting station there are a plurality of hum generators each operating at a separate frequency and means operating to effect sequential timed operation of said hum generators to provide a sequence of hum or vibrating current signals of uniform frequency and by that at the receiving station there are a plurality of hum detectors for detecting such hums, whose hum detectors are activated in sequence to react to a chosen sequence of received hums and means that operate to provide a signal indicative of receipt of a full sequence of himself ñales. (Machine-translation by Google Translate, not legally binding)
ES386797A 1969-12-24 1970-12-23 Tone signalling apparatus Expired ES386797A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US887971A US3649770A (en) 1969-12-24 Tone signaling system

Publications (1)

Publication Number Publication Date
ES386797A1 true ES386797A1 (en) 1973-04-01

Family

ID=25392253

Family Applications (1)

Application Number Title Priority Date Filing Date
ES386797A Expired ES386797A1 (en) 1969-12-24 1970-12-23 Tone signalling apparatus

Country Status (8)

Country Link
BE (1) BE760766A (en)
CA (1) CA928818A (en)
DE (1) DE2062957A1 (en)
ES (1) ES386797A1 (en)
FR (1) FR2072054B1 (en)
GB (1) GB1328665A (en)
NL (1) NL7018746A (en)
ZA (1) ZA708418B (en)

Also Published As

Publication number Publication date
CA928818A (en) 1973-06-19
FR2072054B1 (en) 1973-02-02
GB1328665A (en) 1973-08-30
BE760766A (en) 1971-05-27
DE2062957A1 (en) 1971-07-08
FR2072054A1 (en) 1971-09-24
ZA708418B (en) 1972-07-26
NL7018746A (en) 1971-06-28

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