IT943299B - Ricevitore multiplex di segnali a multifrequenza - Google Patents

Ricevitore multiplex di segnali a multifrequenza

Info

Publication number
IT943299B
IT943299B IT71146/71A IT7114671A IT943299B IT 943299 B IT943299 B IT 943299B IT 71146/71 A IT71146/71 A IT 71146/71A IT 7114671 A IT7114671 A IT 7114671A IT 943299 B IT943299 B IT 943299B
Authority
IT
Italy
Prior art keywords
multiplex receiver
multifrequency signals
multifrequency
signals
multiplex
Prior art date
Application number
IT71146/71A
Other languages
English (en)
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Application granted granted Critical
Publication of IT943299B publication Critical patent/IT943299B/it

Links

Classifications

    • 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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
IT71146/71A 1970-12-18 1971-12-17 Ricevitore multiplex di segnali a multifrequenza IT943299B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9942170A 1970-12-18 1970-12-18

Publications (1)

Publication Number Publication Date
IT943299B true IT943299B (it) 1973-04-02

Family

ID=22274926

Family Applications (1)

Application Number Title Priority Date Filing Date
IT71146/71A IT943299B (it) 1970-12-18 1971-12-17 Ricevitore multiplex di segnali a multifrequenza

Country Status (7)

Country Link
US (1) US3692953A (it)
BE (1) BE776664A (it)
CA (1) CA953368A (it)
DE (1) DE2161979A1 (it)
FR (1) FR2118046B1 (it)
GB (1) GB1354010A (it)
IT (1) IT943299B (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6693957B1 (en) * 1998-12-31 2004-02-17 Nortel Networks Limited Adaptive front end for discrete multitone modem

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223783A (en) * 1960-05-09 1965-12-14 Fuji Tsushinki Seizo Kk Time-division multiplex voice-frequency discriminator
NL267564A (it) * 1960-08-22
US3296464A (en) * 1963-10-21 1967-01-03 Princeton Applied Res Corp Frequency responsive network
US3288940A (en) * 1963-10-24 1966-11-29 Automatic Elect Lab Multifrequency signal receiver
US3445606A (en) * 1966-03-21 1969-05-20 Stromberg Carlson Corp Multifrequency detection system including a frequency multiplying circuit
FR1536854A (fr) * 1966-09-17 1968-08-16 Int Standard Electric Corp Perfectionnements aux récepteurs de signaux électriques alternatifs

Also Published As

Publication number Publication date
FR2118046B1 (it) 1977-01-28
BE776664A (fr) 1972-04-04
CA953368A (en) 1974-08-20
FR2118046A1 (it) 1972-07-28
US3692953A (en) 1972-09-19
DE2161979A1 (de) 1972-07-06
GB1354010A (en) 1974-06-05

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