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IT1176002B - SIMULTANEOUS TRANSMISSION OF VOICE SIGNALS AND DATA ON A VOICE CHANNELS AND DATA ON AN ANALOG CHANNEL - Google Patents

SIMULTANEOUS TRANSMISSION OF VOICE SIGNALS AND DATA ON A VOICE CHANNELS AND DATA ON AN ANALOG CHANNEL

Info

Publication number
IT1176002B
IT1176002B IT20477/84A IT2047784A IT1176002B IT 1176002 B IT1176002 B IT 1176002B IT 20477/84 A IT20477/84 A IT 20477/84A IT 2047784 A IT2047784 A IT 2047784A IT 1176002 B IT1176002 B IT 1176002B
Authority
IT
Italy
Prior art keywords
data
voice
simultaneous transmission
analog channel
channels
Prior art date
Application number
IT20477/84A
Other languages
Italian (it)
Other versions
IT8420477A0 (en
Inventor
Edward Ashford Lee
David Goodwin Shaw
Original Assignee
American Telephone & Telegraph
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 American Telephone & Telegraph filed Critical American Telephone & Telegraph
Publication of IT8420477A0 publication Critical patent/IT8420477A0/en
Application granted granted Critical
Publication of IT1176002B publication Critical patent/IT1176002B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/20—Frequency-division multiplex systems in which at least one carrier is angle-modulated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
IT20477/84A 1983-04-11 1984-04-10 SIMULTANEOUS TRANSMISSION OF VOICE SIGNALS AND DATA ON A VOICE CHANNELS AND DATA ON AN ANALOG CHANNEL IT1176002B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US48392383A 1983-04-11 1983-04-11

Publications (2)

Publication Number Publication Date
IT8420477A0 IT8420477A0 (en) 1984-04-10
IT1176002B true IT1176002B (en) 1987-08-12

Family

ID=23922041

Family Applications (1)

Application Number Title Priority Date Filing Date
IT20477/84A IT1176002B (en) 1983-04-11 1984-04-10 SIMULTANEOUS TRANSMISSION OF VOICE SIGNALS AND DATA ON A VOICE CHANNELS AND DATA ON AN ANALOG CHANNEL

Country Status (5)

Country Link
EP (1) EP0138975A4 (en)
JP (1) JPS60501086A (en)
CA (1) CA1203030A (en)
IT (1) IT1176002B (en)
WO (1) WO1984004216A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4512013A (en) * 1983-04-11 1985-04-16 At&T Bell Laboratories Simultaneous transmission of speech and data over an analog channel
US5636282A (en) * 1994-06-20 1997-06-03 Paradyne Corporation Method for dial-in access security using a multimedia modem
KR102231093B1 (en) 2012-10-09 2021-03-22 페어차일드 세미컨덕터 코포레이션 Data during analog audio

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718767A (en) * 1971-05-20 1973-02-27 Itt Multiplex out-of-band signaling system
US3875339A (en) * 1972-09-05 1975-04-01 I I Communications Inc Variable bandwidth voice and data telephone communication system
US3824347A (en) * 1973-02-01 1974-07-16 Ii Communications Corp Voice and data multiplexing system with improved signalling
DE2757171C3 (en) * 1977-12-22 1980-07-10 Standard Elektrik Lorenz Ag, 7000 Stuttgart Method and arrangement for the transmission of two different pieces of information in a single transmission channel with a given bandwidth on a carrier wave
US4346380A (en) * 1978-12-11 1982-08-24 National Semiconductor Corporation Simultaneous communication of analog and binary information in a single frame of a pulse count modulated digital signal
US4280020A (en) * 1979-01-09 1981-07-21 Essex County Council Radio telephone system with direct digital carrier modulation for data transmission
US4379947A (en) * 1979-02-02 1983-04-12 Teleprompter Corporation System for transmitting data simultaneously with audio
JPS5648732A (en) * 1979-09-28 1981-05-02 Nec Corp Radio equipment
US4313197A (en) * 1980-04-09 1982-01-26 Bell Telephone Laboratories, Incorporated Spread spectrum arrangement for (de)multiplexing speech signals and nonspeech signals
US4512013A (en) * 1983-04-11 1985-04-16 At&T Bell Laboratories Simultaneous transmission of speech and data over an analog channel

Also Published As

Publication number Publication date
CA1203030A (en) 1986-04-08
EP0138975A4 (en) 1988-03-30
EP0138975A1 (en) 1985-05-02
JPS60501086A (en) 1985-07-11
IT8420477A0 (en) 1984-04-10
WO1984004216A1 (en) 1984-10-25

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