JPS5693497A - Line concentration stage channel device - Google Patents

Line concentration stage channel device

Info

Publication number
JPS5693497A
JPS5693497A JP17085979A JP17085979A JPS5693497A JP S5693497 A JPS5693497 A JP S5693497A JP 17085979 A JP17085979 A JP 17085979A JP 17085979 A JP17085979 A JP 17085979A JP S5693497 A JPS5693497 A JP S5693497A
Authority
JP
Japan
Prior art keywords
line
station
master station
break
slave
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
JP17085979A
Other languages
Japanese (ja)
Inventor
Toshimasa Fukui
Hiroshi Kitano
Ichio Kawasaki
Shizuo Ito
Susumu Obara
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
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP17085979A priority Critical patent/JPS5693497A/en
Publication of JPS5693497A publication Critical patent/JPS5693497A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/60—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to satellites or concentrators which connect one or more exchange lines with a group of local lines
    • H04Q3/605—Arrangements in the satellite or concentrator

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To secure subscriber mutual communications stored in the same slave station even for break of communication, by providing the monitor circuit, which detects the disconnection state of the PCM line, and an intra-office folding connection device in the slave station, in the digital exchange system where slave stations and the master station are connected. CONSTITUTION:Various signals transmitted from or received by subscriber SL are converted to digital signals by line concentrating device SC and are transferred to the master station through the idle time slot of PCM highway HW by the control of control processing device RLNP and line concentration control device SCC. If the transmission line is faulty to break the communication with the master station, the fault of the transmission line is detected by transmission terminal station interface device TIF, and highway HW input and output to line concentrating device SC is connected to intraoffice folding connection device IOE by change-over switch SW to perform mutual connection in the slave station.
JP17085979A 1979-12-27 1979-12-27 Line concentration stage channel device Pending JPS5693497A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17085979A JPS5693497A (en) 1979-12-27 1979-12-27 Line concentration stage channel device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17085979A JPS5693497A (en) 1979-12-27 1979-12-27 Line concentration stage channel device

Publications (1)

Publication Number Publication Date
JPS5693497A true JPS5693497A (en) 1981-07-29

Family

ID=15912634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17085979A Pending JPS5693497A (en) 1979-12-27 1979-12-27 Line concentration stage channel device

Country Status (1)

Country Link
JP (1) JPS5693497A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950690A (en) * 1982-09-16 1984-03-23 Fujitsu Ltd Folding system in intra-office
JPS6072396A (en) * 1983-09-28 1985-04-24 Hitachi Ltd Intra-office returning system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52102607A (en) * 1976-02-25 1977-08-29 Hitachi Ltd Remote device control system
JPS54111701A (en) * 1978-02-21 1979-09-01 Nec Corp Control system for remote station

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52102607A (en) * 1976-02-25 1977-08-29 Hitachi Ltd Remote device control system
JPS54111701A (en) * 1978-02-21 1979-09-01 Nec Corp Control system for remote station

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950690A (en) * 1982-09-16 1984-03-23 Fujitsu Ltd Folding system in intra-office
JPS6321399B2 (en) * 1982-09-16 1988-05-06 Fujitsu Ltd
JPS6072396A (en) * 1983-09-28 1985-04-24 Hitachi Ltd Intra-office returning system

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