JPS6453662A - Redundancy circuit system - Google Patents

Redundancy circuit system

Info

Publication number
JPS6453662A
JPS6453662A JP20917087A JP20917087A JPS6453662A JP S6453662 A JPS6453662 A JP S6453662A JP 20917087 A JP20917087 A JP 20917087A JP 20917087 A JP20917087 A JP 20917087A JP S6453662 A JPS6453662 A JP S6453662A
Authority
JP
Japan
Prior art keywords
switch
line interface
circuit system
redundancy circuit
constitution
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
JP20917087A
Other languages
Japanese (ja)
Other versions
JPH0821976B2 (en
Inventor
Hirotsugu Kudo
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
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 filed Critical NEC Corp
Priority to JP62209170A priority Critical patent/JPH0821976B2/en
Publication of JPS6453662A publication Critical patent/JPS6453662A/en
Publication of JPH0821976B2 publication Critical patent/JPH0821976B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Detection And Prevention Of Errors In Transmission (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To simplify the circuit of a line interface part by using a switch in a switch part for a protection switch circuit at the switch part side of a line interface part. CONSTITUTION:Switches 7 and 9 are respectively made into 17X31 and 31X17, one spare port is connected to line interface elements (SIE)10 and 11, and for example, when an interface element (IE1)13 is troubled, a protection switch 12 of a line interface part 1 and the switch 7 are interlocked. Thus, an interface element 10 for a standby port can be used and the redundant constitution can be executed. The same operation is executed even in a line interface part 5.
JP62209170A 1987-08-25 1987-08-25 Redundant circuit method Expired - Lifetime JPH0821976B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62209170A JPH0821976B2 (en) 1987-08-25 1987-08-25 Redundant circuit method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62209170A JPH0821976B2 (en) 1987-08-25 1987-08-25 Redundant circuit method

Publications (2)

Publication Number Publication Date
JPS6453662A true JPS6453662A (en) 1989-03-01
JPH0821976B2 JPH0821976B2 (en) 1996-03-04

Family

ID=16568490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62209170A Expired - Lifetime JPH0821976B2 (en) 1987-08-25 1987-08-25 Redundant circuit method

Country Status (1)

Country Link
JP (1) JPH0821976B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04112535U (en) * 1991-03-15 1992-09-30 日本電気株式会社 Transmission line switching device for communication testing between transmission lines

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55115786A (en) * 1979-02-28 1980-09-05 Fujitsu Ltd N+1 spare system
JPS62136155A (en) * 1985-12-09 1987-06-19 Nec Corp Redundancy device for subscriber's circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55115786A (en) * 1979-02-28 1980-09-05 Fujitsu Ltd N+1 spare system
JPS62136155A (en) * 1985-12-09 1987-06-19 Nec Corp Redundancy device for subscriber's circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04112535U (en) * 1991-03-15 1992-09-30 日本電気株式会社 Transmission line switching device for communication testing between transmission lines

Also Published As

Publication number Publication date
JPH0821976B2 (en) 1996-03-04

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