JPS574691A - Remote control time-division switchboard - Google Patents

Remote control time-division switchboard

Info

Publication number
JPS574691A
JPS574691A JP7879080A JP7879080A JPS574691A JP S574691 A JPS574691 A JP S574691A JP 7879080 A JP7879080 A JP 7879080A JP 7879080 A JP7879080 A JP 7879080A JP S574691 A JPS574691 A JP S574691A
Authority
JP
Japan
Prior art keywords
circuit
time
multiplex
transmission line
control
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
JP7879080A
Other languages
Japanese (ja)
Inventor
Shige Matsuo
Mitsuru Ishikawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7879080A priority Critical patent/JPS574691A/en
Publication of JPS574691A publication Critical patent/JPS574691A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

PURPOSE:To ensure a normal call for subscribers although a fault occurs at a part of the transmission line between a remote station and a master station, by providing a time-division switch between a multiplying circuit and a multiplex separating circuit of the remote station. CONSTITUTION:A channel crossing is carried out by means of a time-divisionswitch 19 so that each 30CH multiplex signal passes through a transmission line. A 120CH multiplex signal arrives from a multiplying circuit 16 to be stored from the 0CH of a storage circuit 191 and in the order of 119CH. This stored signal is read at random at a time of necessary time slot under the control of a control circuit 192 to be delivered to a multiplex separating circuit 17. In such way, the channels are allotted (crossed) so that the multiplex signals passing through a coding/decoding circuit are decentralized to all transmission control circuits by the time-division switch. Thus if a certain transmission line has a fault, for instance, a call is possible with use of the rest transmission lines.
JP7879080A 1980-06-11 1980-06-11 Remote control time-division switchboard Pending JPS574691A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7879080A JPS574691A (en) 1980-06-11 1980-06-11 Remote control time-division switchboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7879080A JPS574691A (en) 1980-06-11 1980-06-11 Remote control time-division switchboard

Publications (1)

Publication Number Publication Date
JPS574691A true JPS574691A (en) 1982-01-11

Family

ID=13671670

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7879080A Pending JPS574691A (en) 1980-06-11 1980-06-11 Remote control time-division switchboard

Country Status (1)

Country Link
JP (1) JPS574691A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5991791A (en) * 1982-11-17 1984-05-26 Fujitsu Ltd Subscriber line concentrator
JPS62274998A (en) * 1986-05-23 1987-11-28 Nec Corp Subscriber line concentrating device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5991791A (en) * 1982-11-17 1984-05-26 Fujitsu Ltd Subscriber line concentrator
JPS62274998A (en) * 1986-05-23 1987-11-28 Nec Corp Subscriber line concentrating device

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