JPS56119569A - Communication line switching system - Google Patents

Communication line switching system

Info

Publication number
JPS56119569A
JPS56119569A JP2257080A JP2257080A JPS56119569A JP S56119569 A JPS56119569 A JP S56119569A JP 2257080 A JP2257080 A JP 2257080A JP 2257080 A JP2257080 A JP 2257080A JP S56119569 A JPS56119569 A JP S56119569A
Authority
JP
Japan
Prior art keywords
line
switching
remote
cpu1
signal
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
JP2257080A
Other languages
Japanese (ja)
Inventor
Masami Shimizu
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 JP2257080A priority Critical patent/JPS56119569A/en
Publication of JPS56119569A publication Critical patent/JPS56119569A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

PURPOSE:To facilitate a switching operation without requiring a manual operation in a remote side, by switching a line automatically for a fault of a leased line by the operation from the center side. CONSTITUTION:By two-line dialing from center-side CPU1 to remote-side data terminal equipment 21, remote-side automatic line switching device 10 is switched from leased line 5 to exchange line 6 automatically. Switching of the remote side is confirmed in CPU1 by the ANS signal generated from device 10 to perform data communication through line 6. When the leased line is released, the ER signal of CPU1 is turned off, and CPU1 transmits the switching signal to the remote side. The remote side detects this signal to perform the switching operation easily without the manual operation.
JP2257080A 1980-02-25 1980-02-25 Communication line switching system Pending JPS56119569A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2257080A JPS56119569A (en) 1980-02-25 1980-02-25 Communication line switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2257080A JPS56119569A (en) 1980-02-25 1980-02-25 Communication line switching system

Publications (1)

Publication Number Publication Date
JPS56119569A true JPS56119569A (en) 1981-09-19

Family

ID=12086527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2257080A Pending JPS56119569A (en) 1980-02-25 1980-02-25 Communication line switching system

Country Status (1)

Country Link
JP (1) JPS56119569A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02105648A (en) * 1988-10-13 1990-04-18 Nec Corp Fault detecting line switching system
US5367562A (en) * 1990-04-23 1994-11-22 Alcatel Cit Method and device for returning to a normal communication link after using a standby link

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02105648A (en) * 1988-10-13 1990-04-18 Nec Corp Fault detecting line switching system
US5367562A (en) * 1990-04-23 1994-11-22 Alcatel Cit Method and device for returning to a normal communication link after using a standby link

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