JPS645131A - Supervisory system for repeater - Google Patents

Supervisory system for repeater

Info

Publication number
JPS645131A
JPS645131A JP15969187A JP15969187A JPS645131A JP S645131 A JPS645131 A JP S645131A JP 15969187 A JP15969187 A JP 15969187A JP 15969187 A JP15969187 A JP 15969187A JP S645131 A JPS645131 A JP S645131A
Authority
JP
Japan
Prior art keywords
incoming
outgoing
control instruction
instruction signal
transmission
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
JP15969187A
Other languages
Japanese (ja)
Other versions
JPH0761047B2 (en
Inventor
Hiroharu Wakabayashi
Shu Yamamoto
Masakuni Kuwazuru
Yoshinao Iwamoto
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Priority to JP15969187A priority Critical patent/JPH0761047B2/en
Publication of JPS645131A publication Critical patent/JPS645131A/en
Publication of JPH0761047B2 publication Critical patent/JPH0761047B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Optical Communication System (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To prevent duplicated reception of a control instruction signal by receiving selectively the control instruction signal so as to make the titled system operative stably even when a loop cable exists anywhere in the transmission system. CONSTITUTION:A preamble P longer than the recoprocated transmission delay of the transmission system is added to the head of the control instruction signal S1 sent from an incoming or outgoing transmission terminal station 10 through optical fibers 3, 4. Then incoming/outgoing monitor circuits 8, 9 check the two incoming/outgoing control instruction signal states after a prescribed time elapsed from the detection of control instruction signals S1, S2 from the incoming or outgoing transmission line in advance to apply the advanced switching so as to receive the control instruction signal of incoming or outgoing line decided in advance when the two incoming/outgoing control instruction signals S1, S2 exist. Thus, the duplicated reception of the incoming/outgoing supervisory circuits is effectively avoided.
JP15969187A 1987-06-29 1987-06-29 Repeater monitoring method Expired - Fee Related JPH0761047B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15969187A JPH0761047B2 (en) 1987-06-29 1987-06-29 Repeater monitoring method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15969187A JPH0761047B2 (en) 1987-06-29 1987-06-29 Repeater monitoring method

Publications (2)

Publication Number Publication Date
JPS645131A true JPS645131A (en) 1989-01-10
JPH0761047B2 JPH0761047B2 (en) 1995-06-28

Family

ID=15699211

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15969187A Expired - Fee Related JPH0761047B2 (en) 1987-06-29 1987-06-29 Repeater monitoring method

Country Status (1)

Country Link
JP (1) JPH0761047B2 (en)

Also Published As

Publication number Publication date
JPH0761047B2 (en) 1995-06-28

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees