JPH01236840A - Line switching system - Google Patents

Line switching system

Info

Publication number
JPH01236840A
JPH01236840A JP6448388A JP6448388A JPH01236840A JP H01236840 A JPH01236840 A JP H01236840A JP 6448388 A JP6448388 A JP 6448388A JP 6448388 A JP6448388 A JP 6448388A JP H01236840 A JPH01236840 A JP H01236840A
Authority
JP
Japan
Prior art keywords
signal
line
control signal
switching
repeater
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
JP6448388A
Other languages
Japanese (ja)
Other versions
JP2664925B2 (en
Inventor
Fujio Hayashida
Mamoru Kikuchi
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
NEC Engineering Ltd
Original Assignee
NEC Corp
NEC Engineering 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, NEC Engineering Ltd filed Critical NEC Corp
Priority to JP6448388A priority Critical patent/JP2664925B2/en
Publication of JPH01236840A publication Critical patent/JPH01236840A/en
Application granted granted Critical
Publication of JP2664925B2 publication Critical patent/JP2664925B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To attain line switching without malfunction by sending a prescribed pattern signal including a supervising control signal to an excess bit after the line is switched when respective intermediate repeaters of the systems in current use receive a switching control signal and the abnormality of an input signal is detected.
CONSTITUTION: A means to detect the abnormality of an input signal and output a switching request signal A is provided for the terminal repeater 20 (or a terminal repeater 30) of the system in current use. When respective present use system intermediate repeaters 40 (or intermediate repeater 50) receive a switching control signal and the abnormality of the input signal is detected, a prescribed pattern signal including a supervising control signal is sent to an excess bit after the line is switched. Thus, the termination repeater 20 can surely detect the input signal and can execute the line switching without a malfunction.
COPYRIGHT: (C)1989,JPO&Japio
JP6448388A 1988-03-17 1988-03-17 Line switching method Expired - Lifetime JP2664925B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6448388A JP2664925B2 (en) 1988-03-17 1988-03-17 Line switching method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6448388A JP2664925B2 (en) 1988-03-17 1988-03-17 Line switching method

Publications (2)

Publication Number Publication Date
JPH01236840A true JPH01236840A (en) 1989-09-21
JP2664925B2 JP2664925B2 (en) 1997-10-22

Family

ID=13259509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6448388A Expired - Lifetime JP2664925B2 (en) 1988-03-17 1988-03-17 Line switching method

Country Status (1)

Country Link
JP (1) JP2664925B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04341028A (en) * 1991-05-17 1992-11-27 Nec Corp Transmitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04341028A (en) * 1991-05-17 1992-11-27 Nec Corp Transmitter

Also Published As

Publication number Publication date
JP2664925B2 (en) 1997-10-22

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