JPS5648742A - Multipoint system - Google Patents

Multipoint system

Info

Publication number
JPS5648742A
JPS5648742A JP12504279A JP12504279A JPS5648742A JP S5648742 A JPS5648742 A JP S5648742A JP 12504279 A JP12504279 A JP 12504279A JP 12504279 A JP12504279 A JP 12504279A JP S5648742 A JPS5648742 A JP S5648742A
Authority
JP
Japan
Prior art keywords
circuit
sent
code
signal
data transmission
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.)
Pending
Application number
JP12504279A
Other languages
Japanese (ja)
Inventor
Hiroshi Kokubo
Noritaka Nakano
Kazuhisa Yoshimura
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP12504279A priority Critical patent/JPS5648742A/en
Publication of JPS5648742A publication Critical patent/JPS5648742A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/50—Circuit switching systems, i.e. systems in which the path is physically permanent during the communication
    • H04L12/52—Circuit switching systems, i.e. systems in which the path is physically permanent during the communication using time division techniques
    • H04L12/525—Circuit switching systems, i.e. systems in which the path is physically permanent during the communication using time division techniques involving a stored program control

Abstract

PURPOSE:To attain data transmission between random MODEMs by connecting multiplexers to modems, by sending a party number code out of the control circuit of the multiplexer, and by outputting a sent-back signal when the identity of the code is recognized at a reception side. CONSTITUTION:For access from terminal T1 connected to time-division multiplexer TDM1, control circuit 1a in multiplexer 1 sends a transmission request signal to MODEM 5 and then changeover switch 9 operates to connect terminal S of MODEM 5 to terminals R of MODEMs 6, 7 and 8. Next, start signal ST, a circuit set code and a party number code of (n) continuous bits are sent out of circuit 1a via modem 5. In a station whose number agress with the sent number code, its changeover switch is put into operation and a sent-back signal consisting of signal ST, a circuit confirmation code and its station number code is sent to TDM1 to establish a circuit for data transmission. After data transmission is finished, a circuit release signal is transmitted from TDM1 to party TDM to release the circuit and the next data transmission is held in readiness.
JP12504279A 1979-09-28 1979-09-28 Multipoint system Pending JPS5648742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12504279A JPS5648742A (en) 1979-09-28 1979-09-28 Multipoint system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12504279A JPS5648742A (en) 1979-09-28 1979-09-28 Multipoint system

Publications (1)

Publication Number Publication Date
JPS5648742A true JPS5648742A (en) 1981-05-02

Family

ID=14900391

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12504279A Pending JPS5648742A (en) 1979-09-28 1979-09-28 Multipoint system

Country Status (1)

Country Link
JP (1) JPS5648742A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60242757A (en) * 1984-05-17 1985-12-02 Fujitsu Ltd Dc modem

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60242757A (en) * 1984-05-17 1985-12-02 Fujitsu Ltd Dc modem
JPH0417576B2 (en) * 1984-05-17 1992-03-26 Fujitsu Ltd

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