JPS6449454A - Multidrop communication system - Google Patents

Multidrop communication system

Info

Publication number
JPS6449454A
JPS6449454A JP20694387A JP20694387A JPS6449454A JP S6449454 A JPS6449454 A JP S6449454A JP 20694387 A JP20694387 A JP 20694387A JP 20694387 A JP20694387 A JP 20694387A JP S6449454 A JPS6449454 A JP S6449454A
Authority
JP
Japan
Prior art keywords
signal
station
terminal
slave station
turned
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
JP20694387A
Other languages
Japanese (ja)
Other versions
JPH0561823B2 (en
Inventor
Junichi Ishida
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 JP20694387A priority Critical patent/JPS6449454A/en
Publication of JPS6449454A publication Critical patent/JPS6449454A/en
Publication of JPH0561823B2 publication Critical patent/JPH0561823B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Time-Division Multiplex Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To perform multidrop communication, by calling the terminal of a slave station from the desired line of a master station by a polling system via a time divisional multiplexing device 30, and sending only a signal being synchronized with the frame bit of the corresponding terminal of a called slave station to the time divisional multiplexing device of the master station via an AND circuit. CONSTITUTION:The transmission side line of the master station A is branched to the slave stations B, C..., and as a reception side line, a digital dedicated line branch network to which information can be inserted via the AND circuits 10, 11,... is used, and the device 30 which performs the time divisional multiplexing of the information of a terminal at a multiplexing part 20 on the mastar station, and the multiplexing part 20 and terminal interface 21 of the time divisional multiplexing device 31 of each slave station set a frame format signal at all 1s when the control signal of the terminal is turned OFF, and send the frame format signal in synchronism with the frame bit when it is turned ON. The slave station called by the polling system sends a response signal when the control signal is turned ON, and the slave station not being called sends a signal of all 1s when the control signal is turned OFF, and only the response signal of the called slave station is inputted to the master station via the AND circuit.
JP20694387A 1987-08-20 1987-08-20 Multidrop communication system Granted JPS6449454A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20694387A JPS6449454A (en) 1987-08-20 1987-08-20 Multidrop communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20694387A JPS6449454A (en) 1987-08-20 1987-08-20 Multidrop communication system

Publications (2)

Publication Number Publication Date
JPS6449454A true JPS6449454A (en) 1989-02-23
JPH0561823B2 JPH0561823B2 (en) 1993-09-07

Family

ID=16531603

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20694387A Granted JPS6449454A (en) 1987-08-20 1987-08-20 Multidrop communication system

Country Status (1)

Country Link
JP (1) JPS6449454A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04115640A (en) * 1990-08-31 1992-04-16 Fujitsu Ltd Signal transmitting system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04115640A (en) * 1990-08-31 1992-04-16 Fujitsu Ltd Signal transmitting system

Also Published As

Publication number Publication date
JPH0561823B2 (en) 1993-09-07

Similar Documents

Publication Publication Date Title
SE8900642L (en) CONNECTION OF SUBSCRIPTION DATA SYSTEMS
KR870002707A (en) System for Network Activation Sequence Control
EP0364082A3 (en) Auto isolation circuit for malfunctioning current loop
JPS6449454A (en) Multidrop communication system
JPS57119541A (en) Retrieval system for communication state
EP0049045A3 (en) A multi-master station, multi-channel digital communication system with channel selection provided at each terminal
JPS5730436A (en) Frame synchronism system
JPS56161750A (en) Synchronizing system in telephone set
JPS56125141A (en) Pulse signal transmission system
JPS5650660A (en) Incoming call centralized answer system
US2707211A (en) Adapter circuit
JPS6473851A (en) Terminal connection identifying system
JPS57176441A (en) Data transfer system
JPS5780847A (en) Loop data transmission system
JPS6455931A (en) Multi-direction multiplex communication system
JPS55123269A (en) Data transmission multiplex system
JPS575446A (en) Polling system in radio telephone system
JPS5577251A (en) Time-division multi-directional multiplex transmission system
JPS5737962A (en) Serially transmitting system for dial information
JPS553222A (en) Signal transmission/reception system
GB1418085A (en) Circuit arrangement for generating prefix signals in telecommuni cation and particularly telephone systems
JPS54157422A (en) Multiplied transmission system
JPS6482749A (en) Announcement machine
JPS5784644A (en) Detection system of transmission line termination state
JPS574650A (en) System for confirming termination of data transfer using tone signal