JPS5555647A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS5555647A
JPS5555647A JP12908078A JP12908078A JPS5555647A JP S5555647 A JPS5555647 A JP S5555647A JP 12908078 A JP12908078 A JP 12908078A JP 12908078 A JP12908078 A JP 12908078A JP S5555647 A JPS5555647 A JP S5555647A
Authority
JP
Japan
Prior art keywords
data
transmission
center frequency
reception
station
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.)
Granted
Application number
JP12908078A
Other languages
Japanese (ja)
Other versions
JPS6123700B2 (en
Inventor
Toshiharu Takatsuki
Kenichi Fujiwara
Shinobu Yanagisawa
Shigeru Okamura
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.)
Mitsubishi Electric Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Mitsubishi Electric Corp
Nippon Telegraph and Telephone 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 Mitsubishi Electric Corp, Nippon Telegraph and Telephone Corp filed Critical Mitsubishi Electric Corp
Priority to JP12908078A priority Critical patent/JPS5555647A/en
Publication of JPS5555647A publication Critical patent/JPS5555647A/en
Priority to US06/214,282 priority patent/US4366572A/en
Publication of JPS6123700B2 publication Critical patent/JPS6123700B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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

Abstract

PURPOSE:To make small the size of transmission system, by making unnecessary the function of transmission and reception of ''data transmission request code''. CONSTITUTION:The start is requested to the transmission station 1a by the reception station 2x, the coding section 19 starts the operation with the start of transmission line between the network control sections 21 and 11, the scanning section 20 sequentially selects data, convertes 19 it into sequential serial pulse train, and modulates it into FS signal. In this case, the modulation center frequency of each data is selected every data depending on the selection signal of the coder 19 to be sequentially delivered to each reception station 2x... via the exchange network 3. The demodulation section 28 of the reception station 2x is set to the modulation center frequency fx for the demodulation center frequency, then the dats X only in FS signal transmitted is modulated, the seiral train obtained is decoded 26 to reproduce parallel data X. Thus, the hardware for the entire transmission system is reduced to make small the system size.
JP12908078A 1978-10-20 1978-10-20 Data transmission system Granted JPS5555647A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP12908078A JPS5555647A (en) 1978-10-20 1978-10-20 Data transmission system
US06/214,282 US4366572A (en) 1978-10-20 1980-12-08 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12908078A JPS5555647A (en) 1978-10-20 1978-10-20 Data transmission system

Publications (2)

Publication Number Publication Date
JPS5555647A true JPS5555647A (en) 1980-04-23
JPS6123700B2 JPS6123700B2 (en) 1986-06-06

Family

ID=15000576

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12908078A Granted JPS5555647A (en) 1978-10-20 1978-10-20 Data transmission system

Country Status (1)

Country Link
JP (1) JPS5555647A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5213379A (en) * 1975-07-22 1977-02-01 Jeol Ltd Spectrophtometer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5213379A (en) * 1975-07-22 1977-02-01 Jeol Ltd Spectrophtometer

Also Published As

Publication number Publication date
JPS6123700B2 (en) 1986-06-06

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