JPS56132858A - Subscriber's line signal system - Google Patents

Subscriber's line signal system

Info

Publication number
JPS56132858A
JPS56132858A JP3709180A JP3709180A JPS56132858A JP S56132858 A JPS56132858 A JP S56132858A JP 3709180 A JP3709180 A JP 3709180A JP 3709180 A JP3709180 A JP 3709180A JP S56132858 A JPS56132858 A JP S56132858A
Authority
JP
Japan
Prior art keywords
control signal
data
subscriber
signals
terminals
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
JP3709180A
Other languages
Japanese (ja)
Inventor
Takashi Akao
Shuji Tomita
Yukio Hiramatsu
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
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP3709180A priority Critical patent/JPS56132858A/en
Publication of JPS56132858A publication Critical patent/JPS56132858A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

PURPOSE:To connect two or more terminals at the same time, by time division- multiplexing a network control signal and a communication data between terminals, and making independent both the signals. CONSTITUTION:When a subscriber sends out a request signal to the switchboard 2 in the course of communication a data between data terminals, the request signal is transferred to the switchboard through the connection route of the network control signal transmission and receiving circuit 5-multidemultiplexer 4-subscriber's line 11-demultiplexer 6-the control signal transmission and receiving circuit 8. That is to say, the network control signal and the communication data are time division- multiplexed, both the signals are made independent, and both the signals are not restricted mutually. Accordingly, a control signal is sent freely when a data is being communicated.
JP3709180A 1980-03-24 1980-03-24 Subscriber's line signal system Pending JPS56132858A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3709180A JPS56132858A (en) 1980-03-24 1980-03-24 Subscriber's line signal system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3709180A JPS56132858A (en) 1980-03-24 1980-03-24 Subscriber's line signal system

Publications (1)

Publication Number Publication Date
JPS56132858A true JPS56132858A (en) 1981-10-17

Family

ID=12487886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3709180A Pending JPS56132858A (en) 1980-03-24 1980-03-24 Subscriber's line signal system

Country Status (1)

Country Link
JP (1) JPS56132858A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5399803A (en) * 1977-02-12 1978-08-31 Nippon Telegr & Teleph Corp <Ntt> Separating signal system for subscriber's line

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5399803A (en) * 1977-02-12 1978-08-31 Nippon Telegr & Teleph Corp <Ntt> Separating signal system for subscriber's line

Similar Documents

Publication Publication Date Title
EP0139405A3 (en) Data transmission system
ES8601598A1 (en) Switching system with separate supervisory links
JPS55136742A (en) Multiplex communication system
EP0143650A3 (en) Vehicle multiplex system
JPS645153A (en) Private line connection system
JPS56132858A (en) Subscriber&#39;s line signal system
JPS55123248A (en) Light loop data transmission system
JPS54116802A (en) Privacy communication system
JPS5728494A (en) Private branch of exchange system
JPS54156407A (en) Information communication system
JPS577655A (en) General multiple address transmission system
JPS5757041A (en) Relay transmission system
JPS56119557A (en) Communication mode switching system
JPS5455306A (en) Multi-address communication system of time-division switchboard
JPS5781758A (en) Signal transmitting system of switchboard
JPS5780847A (en) Loop data transmission system
JPS56156064A (en) Transmitting system of interruption sound
JPS6455927A (en) Multi-direction multiplex communication system
JPS574651A (en) Audible signal transmitting system
JPS5735450A (en) Communication speed switching system for modulation and demodulation device
JPS52120709A (en) Common line signal system
JPS56119564A (en) Key telephone system
JPS56132037A (en) Two-way time division multiple signal transmitting and receiving system
JPS5672552A (en) Multiplex transmission system
JPS56149146A (en) Message communication network