JPS645131A - Supervisory system for repeater - Google Patents
Supervisory system for repeaterInfo
- 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
Links
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
- Optical Communication System (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.
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) |
-
1987
- 1987-06-29 JP JP15969187A patent/JPH0761047B2/en not_active Expired - Fee Related
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 |